2507 lines
86 KiB
Python
2507 lines
86 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright (c) 2013, 2014 Paul Tagliamonte <paultag@debian.org>
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# Copyright (c) 2013 Julien Danjou <julien@danjou.info>
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# Copyright (c) 2013 Nicolas Dandrimont <nicolas.dandrimont@crans.org>
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# Copyright (c) 2013 James King <james@agentultra.com>
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# Copyright (c) 2013, 2014 Bob Tolbert <bob@tolbert.org>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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from hy.models.expression import HyExpression
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from hy.models.keyword import HyKeyword
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from hy.models.integer import HyInteger
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from hy.models.complex import HyComplex
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from hy.models.string import HyString
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from hy.models.symbol import HySymbol
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from hy.models.float import HyFloat
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from hy.models.list import HyList
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from hy.models.set import HySet
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from hy.models.dict import HyDict
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from hy.models.cons import HyCons
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from hy.errors import HyCompileError, HyTypeError
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import hy.macros
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from hy._compat import (
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str_type, long_type, PY27, PY33, PY3, PY34, PY35, raise_empty)
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from hy.macros import require, macroexpand, reader_macroexpand
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import hy.importer
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import traceback
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import importlib
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import codecs
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import ast
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import sys
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import keyword
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from collections import defaultdict
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_compile_time_ns = {}
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def compile_time_ns(module_name):
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ns = _compile_time_ns.get(module_name)
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if ns is None:
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ns = {'hy': hy, '__name__': module_name}
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_compile_time_ns[module_name] = ns
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return ns
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_stdlib = {}
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def load_stdlib():
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import hy.core
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for module in hy.core.STDLIB:
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mod = importlib.import_module(module)
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for e in mod.EXPORTS:
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_stdlib[e] = module
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# True, False and None included here since they
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# are assignable in Python 2.* but become
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# keywords in Python 3.*
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def _is_hy_builtin(name, module_name):
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extras = ['True', 'False', 'None',
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'true', 'false', 'nil']
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if name in extras or keyword.iskeyword(name):
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return True
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# for non-Hy modules, check for pre-existing name in
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# _compile_table
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if not module_name.startswith("hy."):
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return name in _compile_table
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return False
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_compile_table = {}
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def ast_str(foobar):
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if PY3:
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return str(foobar)
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try:
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return str(foobar)
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except UnicodeEncodeError:
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pass
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enc = codecs.getencoder('punycode')
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foobar, _ = enc(foobar)
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return "hy_%s" % (str(foobar).replace("-", "_"))
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def builds(_type):
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unpythonic_chars = ["-"]
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really_ok = ["-"]
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if any(x in unpythonic_chars for x in str_type(_type)):
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if _type not in really_ok:
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raise TypeError("Dear Hypster: `build' needs to be *post* "
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"translated strings... `%s' sucks." % (_type))
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def _dec(fn):
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_compile_table[_type] = fn
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return fn
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return _dec
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def builds_if(_type, condition):
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if condition:
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return builds(_type)
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else:
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return lambda fn: fn
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class Result(object):
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"""
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Smart representation of the result of a hy->AST compilation
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This object tries to reconcile the hy world, where everything can be used
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as an expression, with the Python world, where statements and expressions
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need to coexist.
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To do so, we represent a compiler result as a list of statements `stmts`,
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terminated by an expression context `expr`. The expression context is used
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when the compiler needs to use the result as an expression.
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Results are chained by addition: adding two results together returns a
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Result representing the succession of the two Results' statements, with
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the second Result's expression context.
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We make sure that a non-empty expression context does not get clobbered by
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adding more results, by checking accesses to the expression context. We
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assume that the context has been used, or deliberately ignored, if it has
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been accessed.
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The Result object is interoperable with python AST objects: when an AST
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object gets added to a Result object, it gets converted on-the-fly.
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"""
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__slots__ = ("imports", "stmts", "temp_variables",
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"_expr", "__used_expr", "contains_yield")
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def __init__(self, *args, **kwargs):
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if args:
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# emulate kw-only args for future bits.
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raise TypeError("Yo: Hacker: don't pass me real args, dingus")
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self.imports = defaultdict(set)
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self.stmts = []
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self.temp_variables = []
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self._expr = None
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self.contains_yield = False
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self.__used_expr = False
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# XXX: Make sure we only have AST where we should.
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for kwarg in kwargs:
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if kwarg not in ["imports", "contains_yield", "stmts", "expr",
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"temp_variables"]:
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raise TypeError(
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"%s() got an unexpected keyword argument '%s'" % (
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self.__class__.__name__, kwarg))
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setattr(self, kwarg, kwargs[kwarg])
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@property
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def expr(self):
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self.__used_expr = True
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return self._expr
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@expr.setter
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def expr(self, value):
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self.__used_expr = False
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self._expr = value
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def add_imports(self, mod, imports):
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"""Autoimport `imports` from `mod`"""
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self.imports[mod].update(imports)
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def is_expr(self):
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"""Check whether I am a pure expression"""
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return self._expr and not (self.imports or self.stmts)
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@property
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def force_expr(self):
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"""Force the expression context of the Result.
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If there is no expression context, we return a "None" expression.
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"""
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if self.expr:
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return self.expr
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# Spoof the position of the last statement for our generated None
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lineno = 0
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col_offset = 0
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if self.stmts:
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lineno = self.stmts[-1].lineno
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col_offset = self.stmts[-1].col_offset
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return ast.Name(id=ast_str("None"),
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arg=ast_str("None"),
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ctx=ast.Load(),
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lineno=lineno,
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col_offset=col_offset)
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# XXX: Likely raise Exception here - this will assertionfail
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# pypy since the ast will be out of numerical order.
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def expr_as_stmt(self):
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"""Convert the Result's expression context to a statement
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This is useful when we want to use the stored expression in a
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statement context (for instance in a code branch).
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We drop ast.Names if they are appended to statements, as they
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can't have any side effect. "Bare" names still get converted to
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statements.
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If there is no expression context, return an empty result.
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"""
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if self.expr and not (isinstance(self.expr, ast.Name) and self.stmts):
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return Result() + ast.Expr(lineno=self.expr.lineno,
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col_offset=self.expr.col_offset,
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value=self.expr)
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return Result()
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def rename(self, new_name):
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"""Rename the Result's temporary variables to a `new_name`.
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We know how to handle ast.Names and ast.FunctionDefs.
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"""
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new_name = ast_str(new_name)
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for var in self.temp_variables:
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if isinstance(var, ast.Name):
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var.id = new_name
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var.arg = new_name
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elif isinstance(var, ast.FunctionDef):
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var.name = new_name
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else:
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raise TypeError("Don't know how to rename a %s!" % (
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var.__class__.__name__))
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self.temp_variables = []
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def __add__(self, other):
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# If we add an ast statement, convert it first
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if isinstance(other, ast.stmt):
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return self + Result(stmts=[other])
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# If we add an ast expression, clobber the expression context
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if isinstance(other, ast.expr):
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return self + Result(expr=other)
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if isinstance(other, ast.excepthandler):
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return self + Result(stmts=[other])
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if not isinstance(other, Result):
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raise TypeError("Can't add %r with non-compiler result %r" % (
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self, other))
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# Check for expression context clobbering
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if self.expr and not self.__used_expr:
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traceback.print_stack()
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print("Bad boy clobbered expr %s with %s" % (
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ast.dump(self.expr),
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ast.dump(other.expr)))
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# Fairly obvious addition
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result = Result()
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result.imports = other.imports
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result.stmts = self.stmts + other.stmts
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result.expr = other.expr
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result.temp_variables = other.temp_variables
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result.contains_yield = False
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if self.contains_yield or other.contains_yield:
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result.contains_yield = True
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return result
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def __str__(self):
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return (
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"Result(imports=[%s], stmts=[%s], "
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"expr=%s, contains_yield=%s)"
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) % (
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", ".join(ast.dump(x) for x in self.imports),
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", ".join(ast.dump(x) for x in self.stmts),
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ast.dump(self.expr) if self.expr else None,
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self.contains_yield
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)
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def _branch(results):
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"""Make a branch out of a list of Result objects
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This generates a Result from the given sequence of Results, forcing each
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expression context as a statement before the next result is used.
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We keep the expression context of the last argument for the returned Result
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"""
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results = list(results)
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ret = Result()
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for result in results[:-1]:
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ret += result
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ret += result.expr_as_stmt()
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for result in results[-1:]:
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ret += result
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return ret
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def _raise_wrong_args_number(expression, error):
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raise HyTypeError(expression,
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error % (expression.pop(0),
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len(expression)))
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def checkargs(exact=None, min=None, max=None, even=None, multiple=None):
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def _dec(fn):
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def checker(self, expression):
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if exact is not None and (len(expression) - 1) != exact:
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_raise_wrong_args_number(
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expression, "`%%s' needs %d arguments, got %%d" % exact)
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if min is not None and (len(expression) - 1) < min:
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_raise_wrong_args_number(
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expression,
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"`%%s' needs at least %d arguments, got %%d." % (min))
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if max is not None and (len(expression) - 1) > max:
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_raise_wrong_args_number(
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expression,
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"`%%s' needs at most %d arguments, got %%d" % (max))
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is_even = not((len(expression) - 1) % 2)
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if even is not None and is_even != even:
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even_str = "even" if even else "odd"
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_raise_wrong_args_number(
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expression,
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"`%%s' needs an %s number of arguments, got %%d"
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% (even_str))
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if multiple is not None:
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if not (len(expression) - 1) in multiple:
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choices = ", ".join([str(val) for val in multiple[:-1]])
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choices += " or %s" % multiple[-1]
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_raise_wrong_args_number(
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expression,
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"`%%s' needs %s arguments, got %%d" % choices)
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return fn(self, expression)
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return checker
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return _dec
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class HyASTCompiler(object):
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def __init__(self, module_name):
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self.anon_fn_count = 0
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self.anon_var_count = 0
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self.imports = defaultdict(set)
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self.module_name = module_name
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if not module_name.startswith("hy.core"):
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# everything in core needs to be explicit.
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load_stdlib()
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def get_anon_var(self):
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self.anon_var_count += 1
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return "_hy_anon_var_%s" % self.anon_var_count
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def get_anon_fn(self):
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self.anon_fn_count += 1
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return "_hy_anon_fn_%d" % self.anon_fn_count
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def update_imports(self, result):
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"""Retrieve the imports from the result object"""
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for mod in result.imports:
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self.imports[mod].update(result.imports[mod])
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def imports_as_stmts(self, expr):
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"""Convert the Result's imports to statements"""
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ret = Result()
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for module, names in self.imports.items():
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if None in names:
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ret += self.compile([
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HyExpression([
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HySymbol("import"),
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HySymbol(module),
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]).replace(expr)
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])
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names = sorted(name for name in names if name)
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if names:
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ret += self.compile([
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HyExpression([
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HySymbol("import"),
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HyList([
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HySymbol(module),
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HyList([HySymbol(name) for name in names])
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])
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]).replace(expr)
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])
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self.imports = defaultdict(set)
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return ret.stmts
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def compile_atom(self, atom_type, atom):
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if atom_type in _compile_table:
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ret = _compile_table[atom_type](self, atom)
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if not isinstance(ret, Result):
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ret = Result() + ret
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return ret
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def compile(self, tree):
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try:
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_type = type(tree)
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ret = self.compile_atom(_type, tree)
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if ret:
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self.update_imports(ret)
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return ret
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except HyCompileError:
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# compile calls compile, so we're going to have multiple raise
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# nested; so let's re-raise this exception, let's not wrap it in
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# another HyCompileError!
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raise
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except HyTypeError as e:
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raise
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except Exception as e:
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raise_empty(HyCompileError, e, sys.exc_info()[2])
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raise HyCompileError(Exception("Unknown type: `%s'" % _type))
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def _compile_collect(self, exprs, with_kwargs=False):
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"""Collect the expression contexts from a list of compiled expression.
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This returns a list of the expression contexts, and the sum of the
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Result objects passed as arguments.
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"""
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compiled_exprs = []
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ret = Result()
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keywords = []
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exprs_iter = iter(exprs)
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for expr in exprs_iter:
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if with_kwargs and isinstance(expr, HyKeyword):
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try:
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value = next(exprs_iter)
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except StopIteration:
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raise HyTypeError(expr,
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"Keyword argument {kw} needs "
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"a value.".format(kw=str(expr[1:])))
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compiled_value = self.compile(value)
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ret += compiled_value
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# no unicode for py2 in ast names
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keyword = str(expr[2:])
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if "-" in keyword and keyword != "-":
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keyword = keyword.replace("-", "_")
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keywords.append(ast.keyword(arg=keyword,
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value=compiled_value.force_expr,
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lineno=expr.start_line,
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col_offset=expr.start_column))
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else:
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ret += self.compile(expr)
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compiled_exprs.append(ret.force_expr)
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return compiled_exprs, ret, keywords
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def _compile_branch(self, exprs):
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return _branch(self.compile(expr) for expr in exprs)
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def _parse_lambda_list(self, exprs):
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""" Return FunctionDef parameter values from lambda list."""
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ll_keywords = ("&rest", "&optional", "&key", "&kwonly", "&kwargs")
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ret = Result()
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args = []
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defaults = []
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varargs = None
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kwonlyargs = []
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kwonlydefaults = []
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kwargs = None
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lambda_keyword = None
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for expr in exprs:
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if expr in ll_keywords:
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if expr == "&rest" and lambda_keyword is None:
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lambda_keyword = expr
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elif expr == "&optional":
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if len(defaults) > 0:
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raise HyTypeError(expr,
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"There can only be &optional "
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"arguments or one &key argument")
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lambda_keyword = expr
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elif expr == "&key":
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lambda_keyword = expr
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elif expr == "&kwonly":
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lambda_keyword = expr
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elif expr == "&kwargs":
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lambda_keyword = expr
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else:
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raise HyTypeError(expr,
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"{0} is in an invalid "
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"position.".format(repr(expr)))
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# we don't actually care about this token, so we set
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# our state and continue to the next token...
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continue
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|
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if lambda_keyword is None:
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args.append(expr)
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elif lambda_keyword == "&rest":
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if varargs:
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raise HyTypeError(expr,
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"There can only be one "
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"&rest argument")
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varargs = str(expr)
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elif lambda_keyword == "&key":
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if type(expr) != HyDict:
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raise HyTypeError(expr,
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"There can only be one &key "
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"argument")
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|
else:
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if len(defaults) > 0:
|
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raise HyTypeError(expr,
|
|
"There can only be &optional "
|
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"arguments or one &key argument")
|
|
# As you can see, Python has a funny way of
|
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# defining keyword arguments.
|
|
it = iter(expr)
|
|
for k, v in zip(it, it):
|
|
args.append(k)
|
|
ret += self.compile(v)
|
|
defaults.append(ret.force_expr)
|
|
elif lambda_keyword == "&optional":
|
|
if isinstance(expr, HyList):
|
|
if not len(expr) == 2:
|
|
raise HyTypeError(expr,
|
|
"optional args should be bare names "
|
|
"or 2-item lists")
|
|
k, v = expr
|
|
else:
|
|
k = expr
|
|
v = HySymbol("None").replace(k)
|
|
args.append(k)
|
|
ret += self.compile(v)
|
|
defaults.append(ret.force_expr)
|
|
elif lambda_keyword == "&kwonly":
|
|
if not PY3:
|
|
raise HyTypeError(expr,
|
|
"keyword-only arguments are only "
|
|
"available under Python 3")
|
|
if isinstance(expr, HyList):
|
|
if len(expr) != 2:
|
|
raise HyTypeError(expr,
|
|
"keyword-only args should be bare "
|
|
"names or 2-item lists")
|
|
k, v = expr
|
|
kwonlyargs.append(k)
|
|
ret += self.compile(v)
|
|
kwonlydefaults.append(ret.force_expr)
|
|
else:
|
|
k = expr
|
|
kwonlyargs.append(k)
|
|
kwonlydefaults.append(None)
|
|
elif lambda_keyword == "&kwargs":
|
|
if kwargs:
|
|
raise HyTypeError(expr,
|
|
"There can only be one "
|
|
"&kwargs argument")
|
|
kwargs = str(expr)
|
|
|
|
return ret, args, defaults, varargs, kwonlyargs, kwonlydefaults, kwargs
|
|
|
|
def _storeize(self, name, func=None):
|
|
"""Return a new `name` object with an ast.Store() context"""
|
|
if not func:
|
|
func = ast.Store
|
|
|
|
if isinstance(name, Result):
|
|
if not name.is_expr():
|
|
raise TypeError("Can't assign / delete a non-expression")
|
|
name = name.expr
|
|
|
|
if isinstance(name, (ast.Tuple, ast.List)):
|
|
typ = type(name)
|
|
new_elts = []
|
|
for x in name.elts:
|
|
new_elts.append(self._storeize(x, func))
|
|
new_name = typ(elts=new_elts)
|
|
elif isinstance(name, ast.Name):
|
|
new_name = ast.Name(id=name.id, arg=name.arg)
|
|
elif isinstance(name, ast.Subscript):
|
|
new_name = ast.Subscript(value=name.value, slice=name.slice)
|
|
elif isinstance(name, ast.Attribute):
|
|
new_name = ast.Attribute(value=name.value, attr=name.attr)
|
|
else:
|
|
raise TypeError("Can't assign / delete a %s object" % type(name))
|
|
|
|
new_name.ctx = func()
|
|
ast.copy_location(new_name, name)
|
|
return new_name
|
|
|
|
@builds(list)
|
|
def compile_raw_list(self, entries):
|
|
ret = self._compile_branch(entries)
|
|
ret += ret.expr_as_stmt()
|
|
return ret
|
|
|
|
def _render_quoted_form(self, form, level):
|
|
"""
|
|
Render a quoted form as a new HyExpression.
|
|
|
|
`level` is the level of quasiquoting of the current form. We can
|
|
unquote if level is 0.
|
|
|
|
Returns a three-tuple (`imports`, `expression`, `splice`).
|
|
|
|
The `splice` return value is used to mark `unquote-splice`d forms.
|
|
We need to distinguish them as want to concatenate them instead of
|
|
just nesting them.
|
|
"""
|
|
if level == 0:
|
|
if isinstance(form, HyExpression):
|
|
if form and form[0] in ("unquote", "unquote_splice"):
|
|
if len(form) != 2:
|
|
raise HyTypeError(form,
|
|
("`%s' needs 1 argument, got %s" %
|
|
form[0], len(form) - 1))
|
|
return set(), form[1], (form[0] == "unquote_splice")
|
|
|
|
if isinstance(form, HyExpression):
|
|
if form and form[0] == "quasiquote":
|
|
level += 1
|
|
if form and form[0] in ("unquote", "unquote_splice"):
|
|
level -= 1
|
|
|
|
name = form.__class__.__name__
|
|
imports = set([name])
|
|
|
|
if isinstance(form, (HyList, HyDict, HySet)):
|
|
if not form:
|
|
contents = HyList()
|
|
else:
|
|
# If there are arguments, they can be spliced
|
|
# so we build a sum...
|
|
contents = HyExpression([HySymbol("+"), HyList()])
|
|
|
|
for x in form:
|
|
f_imports, f_contents, splice = self._render_quoted_form(x,
|
|
level)
|
|
imports.update(f_imports)
|
|
if splice:
|
|
to_add = HyExpression([HySymbol("list"), f_contents])
|
|
else:
|
|
to_add = HyList([f_contents])
|
|
|
|
contents.append(to_add)
|
|
|
|
return imports, HyExpression([HySymbol(name),
|
|
contents]).replace(form), False
|
|
|
|
elif isinstance(form, HyCons):
|
|
ret = HyExpression([HySymbol(name)])
|
|
nimport, contents, splice = self._render_quoted_form(form.car,
|
|
level)
|
|
if splice:
|
|
raise HyTypeError(form, "Can't splice dotted lists yet")
|
|
imports.update(nimport)
|
|
ret.append(contents)
|
|
|
|
nimport, contents, splice = self._render_quoted_form(form.cdr,
|
|
level)
|
|
if splice:
|
|
raise HyTypeError(form, "Can't splice the cdr of a cons")
|
|
imports.update(nimport)
|
|
ret.append(contents)
|
|
|
|
return imports, ret.replace(form), False
|
|
|
|
elif isinstance(form, HySymbol):
|
|
return imports, HyExpression([HySymbol(name),
|
|
HyString(form)]).replace(form), False
|
|
|
|
return imports, HyExpression([HySymbol(name),
|
|
form]).replace(form), False
|
|
|
|
@builds("quote")
|
|
@builds("quasiquote")
|
|
@checkargs(exact=1)
|
|
def compile_quote(self, entries):
|
|
if entries[0] == "quote":
|
|
# Never allow unquoting
|
|
level = float("inf")
|
|
else:
|
|
level = 0
|
|
imports, stmts, splice = self._render_quoted_form(entries[1], level)
|
|
ret = self.compile(stmts)
|
|
ret.add_imports("hy", imports)
|
|
return ret
|
|
|
|
@builds("unquote")
|
|
@builds("unquote_splicing")
|
|
def compile_unquote(self, expr):
|
|
raise HyTypeError(expr,
|
|
"`%s' can't be used at the top-level" % expr[0])
|
|
|
|
@builds("eval")
|
|
@checkargs(min=1, max=3)
|
|
def compile_eval(self, expr):
|
|
expr.pop(0)
|
|
|
|
if not isinstance(expr[0], (HyExpression, HySymbol)):
|
|
raise HyTypeError(expr, "expression expected as first argument")
|
|
|
|
elist = [HySymbol("hy_eval")] + [expr[0]]
|
|
if len(expr) >= 2:
|
|
if not isinstance(expr[1], (HyDict, HySymbol)):
|
|
raise HyTypeError(expr, "Globals must be a dictionary")
|
|
elist.append(expr[1])
|
|
else:
|
|
elist.append(HyExpression([HySymbol("locals")]))
|
|
|
|
if len(expr) == 3:
|
|
if not isinstance(expr[2], HyString):
|
|
raise HyTypeError(expr, "Module name must be a string")
|
|
elist.append(expr[2])
|
|
else:
|
|
elist.append(HyString(self.module_name))
|
|
|
|
ret = self.compile(HyExpression(elist).replace(expr))
|
|
|
|
ret.add_imports("hy.importer", ["hy_eval"])
|
|
|
|
return ret
|
|
|
|
@builds("do")
|
|
def compile_do(self, expression):
|
|
expression.pop(0)
|
|
return self._compile_branch(expression)
|
|
|
|
@builds("raise")
|
|
@checkargs(multiple=[0, 1, 3])
|
|
def compile_raise_expression(self, expr):
|
|
expr.pop(0)
|
|
ret = Result()
|
|
if expr:
|
|
ret += self.compile(expr.pop(0))
|
|
|
|
cause = None
|
|
if len(expr) == 2 and expr[0] == HyKeyword(":from"):
|
|
if not PY3:
|
|
raise HyCompileError(
|
|
"raise from only supported in python 3")
|
|
expr.pop(0)
|
|
cause = self.compile(expr.pop(0))
|
|
cause = cause.expr
|
|
|
|
# Use ret.expr to get a literal `None`
|
|
ret += ast.Raise(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
type=ret.expr,
|
|
exc=ret.expr,
|
|
inst=None,
|
|
tback=None,
|
|
cause=cause)
|
|
|
|
return ret
|
|
|
|
@builds("try")
|
|
def compile_try_expression(self, expr):
|
|
expr.pop(0) # try
|
|
|
|
try:
|
|
body = expr.pop(0)
|
|
except IndexError:
|
|
body = []
|
|
|
|
# (try something…)
|
|
body = self.compile(body)
|
|
|
|
var = self.get_anon_var()
|
|
name = ast.Name(id=ast_str(var), arg=ast_str(var),
|
|
ctx=ast.Store(),
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
expr_name = ast.Name(id=ast_str(var), arg=ast_str(var),
|
|
ctx=ast.Load(),
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
returnable = Result(expr=expr_name, temp_variables=[expr_name, name],
|
|
contains_yield=body.contains_yield)
|
|
|
|
body += ast.Assign(targets=[name],
|
|
value=body.force_expr,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
body = body.stmts
|
|
if not body:
|
|
body = [ast.Pass(lineno=expr.start_line,
|
|
col_offset=expr.start_column)]
|
|
|
|
orelse = []
|
|
finalbody = []
|
|
handlers = []
|
|
handler_results = Result()
|
|
|
|
for e in expr:
|
|
if not len(e):
|
|
raise HyTypeError(e, "Empty list not allowed in `try'")
|
|
|
|
if e[0] == HySymbol("except"):
|
|
handler_results += self._compile_catch_expression(e, name)
|
|
handlers.append(handler_results.stmts.pop())
|
|
elif e[0] == HySymbol("else"):
|
|
orelse = self.try_except_helper(e, HySymbol("else"), orelse)
|
|
elif e[0] == HySymbol("finally"):
|
|
finalbody = self.try_except_helper(e, HySymbol("finally"),
|
|
finalbody)
|
|
else:
|
|
raise HyTypeError(e, "Unknown expression in `try'")
|
|
|
|
# Using (else) without (except) is verboten!
|
|
if orelse and not handlers:
|
|
raise HyTypeError(
|
|
e,
|
|
"`try' cannot have `else' without `except'")
|
|
|
|
# (try) or (try BODY)
|
|
# Generate a default handler for Python >= 3.3 and pypy
|
|
if not handlers and not finalbody and not orelse:
|
|
handlers = [ast.ExceptHandler(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
type=None,
|
|
name=None,
|
|
body=[ast.Raise(lineno=expr.start_line,
|
|
col_offset=expr.start_column)])]
|
|
|
|
ret = handler_results
|
|
|
|
if PY33:
|
|
# Python 3.3 features a merge of TryExcept+TryFinally into Try.
|
|
return ret + ast.Try(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
body=body,
|
|
handlers=handlers,
|
|
orelse=orelse,
|
|
finalbody=finalbody) + returnable
|
|
|
|
if finalbody:
|
|
if handlers:
|
|
return ret + ast.TryFinally(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
body=[ast.TryExcept(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
handlers=handlers,
|
|
body=body,
|
|
orelse=orelse)],
|
|
finalbody=finalbody) + returnable
|
|
|
|
return ret + ast.TryFinally(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
body=body,
|
|
finalbody=finalbody) + returnable
|
|
|
|
return ret + ast.TryExcept(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
handlers=handlers,
|
|
body=body,
|
|
orelse=orelse) + returnable
|
|
|
|
def try_except_helper(self, hy_obj, symbol, accumulated):
|
|
if accumulated:
|
|
raise HyTypeError(
|
|
hy_obj,
|
|
"`try' cannot have more than one `%s'" % symbol)
|
|
else:
|
|
accumulated = self._compile_branch(hy_obj[1:])
|
|
accumulated += accumulated.expr_as_stmt()
|
|
accumulated = accumulated.stmts
|
|
return accumulated
|
|
|
|
@builds("except")
|
|
def magic_internal_form(self, expr):
|
|
raise HyTypeError(expr,
|
|
"Error: `%s' can't be used like that." % (expr[0]))
|
|
|
|
def _compile_catch_expression(self, expr, var):
|
|
catch = expr.pop(0) # catch
|
|
|
|
try:
|
|
exceptions = expr.pop(0)
|
|
except IndexError:
|
|
exceptions = HyList()
|
|
|
|
# exceptions catch should be either:
|
|
# [[list of exceptions]]
|
|
# or
|
|
# [variable [list of exceptions]]
|
|
# or
|
|
# [variable exception]
|
|
# or
|
|
# [exception]
|
|
# or
|
|
# []
|
|
|
|
if not isinstance(exceptions, HyList):
|
|
raise HyTypeError(exceptions,
|
|
"`%s' exceptions list is not a list" % catch)
|
|
if len(exceptions) > 2:
|
|
raise HyTypeError(exceptions,
|
|
"`%s' exceptions list is too long" % catch)
|
|
|
|
# [variable [list of exceptions]]
|
|
# let's pop variable and use it as name
|
|
if len(exceptions) == 2:
|
|
name = exceptions.pop(0)
|
|
if not isinstance(name, HySymbol):
|
|
raise HyTypeError(
|
|
exceptions,
|
|
"Exception storage target name must be a symbol.")
|
|
|
|
if PY3:
|
|
# Python3 features a change where the Exception handler
|
|
# moved the name from a Name() to a pure Python String type.
|
|
#
|
|
# We'll just make sure it's a pure "string", and let it work
|
|
# it's magic.
|
|
name = ast_str(name)
|
|
else:
|
|
# Python2 requires an ast.Name, set to ctx Store.
|
|
name = self._storeize(self.compile(name))
|
|
else:
|
|
name = None
|
|
|
|
try:
|
|
exceptions_list = exceptions.pop(0)
|
|
except IndexError:
|
|
exceptions_list = []
|
|
|
|
if isinstance(exceptions_list, list):
|
|
if len(exceptions_list):
|
|
# [FooBar BarFoo] → catch Foobar and BarFoo exceptions
|
|
elts, _type, _ = self._compile_collect(exceptions_list)
|
|
_type += ast.Tuple(elts=elts,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
ctx=ast.Load())
|
|
else:
|
|
# [] → all exceptions catched
|
|
_type = Result()
|
|
elif isinstance(exceptions_list, HySymbol):
|
|
_type = self.compile(exceptions_list)
|
|
else:
|
|
raise HyTypeError(exceptions,
|
|
"`%s' needs a valid exception list" % catch)
|
|
|
|
body = self._compile_branch(expr)
|
|
body += ast.Assign(targets=[var],
|
|
value=body.force_expr,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
body += body.expr_as_stmt()
|
|
|
|
body = body.stmts
|
|
if not body:
|
|
body = [ast.Pass(lineno=expr.start_line,
|
|
col_offset=expr.start_column)]
|
|
|
|
# use _type.expr to get a literal `None`
|
|
return _type + ast.ExceptHandler(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
type=_type.expr,
|
|
name=name,
|
|
body=body)
|
|
|
|
@builds("if")
|
|
@checkargs(min=2, max=3)
|
|
def compile_if(self, expression):
|
|
expression.pop(0)
|
|
cond = self.compile(expression.pop(0))
|
|
|
|
body = self.compile(expression.pop(0))
|
|
orel = Result()
|
|
if expression:
|
|
orel = self.compile(expression.pop(0))
|
|
|
|
# We want to hoist the statements from the condition
|
|
ret = cond
|
|
|
|
if body.stmts or orel.stmts:
|
|
# We have statements in our bodies
|
|
# Get a temporary variable for the result storage
|
|
var = self.get_anon_var()
|
|
name = ast.Name(id=ast_str(var), arg=ast_str(var),
|
|
ctx=ast.Store(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
# Store the result of the body
|
|
body += ast.Assign(targets=[name],
|
|
value=body.force_expr,
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
# and of the else clause
|
|
orel += ast.Assign(targets=[name],
|
|
value=orel.force_expr,
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
# Then build the if
|
|
ret += ast.If(test=ret.force_expr,
|
|
body=body.stmts,
|
|
orelse=orel.stmts,
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
# And make our expression context our temp variable
|
|
expr_name = ast.Name(id=ast_str(var), arg=ast_str(var),
|
|
ctx=ast.Load(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
ret += Result(expr=expr_name, temp_variables=[expr_name, name])
|
|
else:
|
|
# Just make that an if expression
|
|
ret += ast.IfExp(test=ret.force_expr,
|
|
body=body.force_expr,
|
|
orelse=orel.force_expr,
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
return ret
|
|
|
|
@builds("break")
|
|
def compile_break_expression(self, expr):
|
|
ret = ast.Break(lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
return ret
|
|
|
|
@builds("continue")
|
|
def compile_continue_expression(self, expr):
|
|
ret = ast.Continue(lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
return ret
|
|
|
|
@builds("assert")
|
|
@checkargs(min=1, max=2)
|
|
def compile_assert_expression(self, expr):
|
|
expr.pop(0) # assert
|
|
e = expr.pop(0)
|
|
if len(expr) == 1:
|
|
msg = self.compile(expr.pop(0)).force_expr
|
|
else:
|
|
msg = None
|
|
ret = self.compile(e)
|
|
ret += ast.Assert(test=ret.force_expr,
|
|
msg=msg,
|
|
lineno=e.start_line,
|
|
col_offset=e.start_column)
|
|
|
|
return ret
|
|
|
|
@builds("global")
|
|
@checkargs(min=1)
|
|
def compile_global_expression(self, expr):
|
|
expr.pop(0) # global
|
|
names = []
|
|
while len(expr) > 0:
|
|
identifier = expr.pop(0)
|
|
name = ast_str(identifier)
|
|
names.append(name)
|
|
if not isinstance(identifier, HySymbol):
|
|
raise HyTypeError(identifier, "(global) arguments must "
|
|
" be Symbols")
|
|
|
|
return ast.Global(names=names,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
@builds("nonlocal")
|
|
@checkargs(min=1)
|
|
def compile_nonlocal_expression(self, expr):
|
|
if not PY3:
|
|
raise HyCompileError(
|
|
"nonlocal only supported in python 3!")
|
|
|
|
expr.pop(0) # nonlocal
|
|
names = []
|
|
while len(expr) > 0:
|
|
identifier = expr.pop(0)
|
|
name = ast_str(identifier)
|
|
names.append(name)
|
|
if not isinstance(identifier, HySymbol):
|
|
raise HyTypeError(identifier, "(nonlocal) arguments must "
|
|
"be Symbols.")
|
|
|
|
return ast.Nonlocal(names=names,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
@builds("yield")
|
|
@checkargs(max=1)
|
|
def compile_yield_expression(self, expr):
|
|
expr.pop(0)
|
|
if PY33:
|
|
ret = Result(contains_yield=False)
|
|
else:
|
|
ret = Result(contains_yield=True)
|
|
|
|
value = None
|
|
if expr != []:
|
|
ret += self.compile(expr.pop(0))
|
|
value = ret.force_expr
|
|
|
|
ret += ast.Yield(
|
|
value=value,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
return ret
|
|
|
|
@builds("yield_from")
|
|
@checkargs(max=1)
|
|
def compile_yield_from_expression(self, expr):
|
|
if not PY33:
|
|
raise HyCompileError(
|
|
"yield-from only supported in python 3.3+!")
|
|
|
|
expr.pop(0)
|
|
ret = Result(contains_yield=True)
|
|
|
|
value = None
|
|
if expr != []:
|
|
ret += self.compile(expr.pop(0))
|
|
value = ret.force_expr
|
|
|
|
ret += ast.YieldFrom(
|
|
value=value,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
return ret
|
|
|
|
@builds("import")
|
|
def compile_import_expression(self, expr):
|
|
def _compile_import(expr, module, names=None, importer=ast.Import):
|
|
if not names:
|
|
names = [ast.alias(name=ast_str(module), asname=None)]
|
|
ret = importer(lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
module=ast_str(module),
|
|
names=names,
|
|
level=0)
|
|
return Result() + ret
|
|
|
|
expr.pop(0) # index
|
|
rimports = Result()
|
|
while len(expr) > 0:
|
|
iexpr = expr.pop(0)
|
|
|
|
if not isinstance(iexpr, (HySymbol, HyList)):
|
|
raise HyTypeError(iexpr, "(import) requires a Symbol "
|
|
"or a List.")
|
|
|
|
if isinstance(iexpr, HySymbol):
|
|
rimports += _compile_import(expr, iexpr)
|
|
continue
|
|
|
|
if isinstance(iexpr, HyList) and len(iexpr) == 1:
|
|
rimports += _compile_import(expr, iexpr.pop(0))
|
|
continue
|
|
|
|
if isinstance(iexpr, HyList) and iexpr:
|
|
module = iexpr.pop(0)
|
|
entry = iexpr[0]
|
|
if isinstance(entry, HyKeyword) and entry == HyKeyword(":as"):
|
|
if not len(iexpr) == 2:
|
|
raise HyTypeError(iexpr,
|
|
"garbage after aliased import")
|
|
iexpr.pop(0) # :as
|
|
alias = iexpr.pop(0)
|
|
names = [ast.alias(name=ast_str(module),
|
|
asname=ast_str(alias))]
|
|
rimports += _compile_import(expr, ast_str(module), names)
|
|
continue
|
|
|
|
if isinstance(entry, HyList):
|
|
names = []
|
|
while entry:
|
|
sym = entry.pop(0)
|
|
if entry and isinstance(entry[0], HyKeyword):
|
|
entry.pop(0)
|
|
alias = ast_str(entry.pop(0))
|
|
else:
|
|
alias = None
|
|
names.append(ast.alias(name=ast_str(sym),
|
|
asname=alias))
|
|
|
|
rimports += _compile_import(expr, module,
|
|
names, ast.ImportFrom)
|
|
continue
|
|
|
|
raise HyTypeError(
|
|
entry,
|
|
"Unknown entry (`%s`) in the HyList" % (entry)
|
|
)
|
|
|
|
return rimports
|
|
|
|
@builds("get")
|
|
@checkargs(min=2)
|
|
def compile_index_expression(self, expr):
|
|
expr.pop(0) # index
|
|
|
|
val = self.compile(expr.pop(0))
|
|
slices, ret, _ = self._compile_collect(expr)
|
|
|
|
if val.stmts:
|
|
ret += val
|
|
|
|
for sli in slices:
|
|
val = Result() + ast.Subscript(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
value=val.force_expr,
|
|
slice=ast.Index(value=sli),
|
|
ctx=ast.Load())
|
|
|
|
return ret + val
|
|
|
|
@builds(".")
|
|
@checkargs(min=1)
|
|
def compile_attribute_access(self, expr):
|
|
expr.pop(0) # dot
|
|
|
|
ret = self.compile(expr.pop(0))
|
|
|
|
for attr in expr:
|
|
if isinstance(attr, HySymbol):
|
|
ret += ast.Attribute(lineno=attr.start_line,
|
|
col_offset=attr.start_column,
|
|
value=ret.force_expr,
|
|
attr=ast_str(attr),
|
|
ctx=ast.Load())
|
|
elif type(attr) == HyList:
|
|
if len(attr) != 1:
|
|
raise HyTypeError(
|
|
attr,
|
|
"The attribute access DSL only accepts HySymbols "
|
|
"and one-item lists, got {0}-item list instead".format(
|
|
len(attr),
|
|
),
|
|
)
|
|
compiled_attr = self.compile(attr.pop(0))
|
|
ret = compiled_attr + ret + ast.Subscript(
|
|
lineno=attr.start_line,
|
|
col_offset=attr.start_column,
|
|
value=ret.force_expr,
|
|
slice=ast.Index(value=compiled_attr.force_expr),
|
|
ctx=ast.Load())
|
|
else:
|
|
raise HyTypeError(
|
|
attr,
|
|
"The attribute access DSL only accepts HySymbols "
|
|
"and one-item lists, got {0} instead".format(
|
|
type(attr).__name__,
|
|
),
|
|
)
|
|
|
|
return ret
|
|
|
|
@builds("del")
|
|
@checkargs(min=1)
|
|
def compile_del_expression(self, expr):
|
|
expr.pop(0)
|
|
ld_targets, ret, _ = self._compile_collect(expr)
|
|
|
|
del_targets = []
|
|
for target in ld_targets:
|
|
del_targets.append(self._storeize(target, ast.Del))
|
|
|
|
return ret + ast.Delete(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
targets=del_targets)
|
|
|
|
@builds("cut")
|
|
@checkargs(min=1, max=4)
|
|
def compile_cut_expression(self, expr):
|
|
expr.pop(0) # index
|
|
val = self.compile(expr.pop(0)) # target
|
|
|
|
low = Result()
|
|
if expr != []:
|
|
low = self.compile(expr.pop(0))
|
|
|
|
high = Result()
|
|
if expr != []:
|
|
high = self.compile(expr.pop(0))
|
|
|
|
step = Result()
|
|
if expr != []:
|
|
step = self.compile(expr.pop(0))
|
|
|
|
# use low.expr, high.expr and step.expr to use a literal `None`.
|
|
return val + low + high + step + ast.Subscript(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
value=val.force_expr,
|
|
slice=ast.Slice(lower=low.expr,
|
|
upper=high.expr,
|
|
step=step.expr),
|
|
ctx=ast.Load())
|
|
|
|
@builds("assoc")
|
|
@checkargs(min=3, even=False)
|
|
def compile_assoc_expression(self, expr):
|
|
expr.pop(0) # assoc
|
|
# (assoc foo bar baz) => foo[bar] = baz
|
|
target = self.compile(expr.pop(0))
|
|
ret = target
|
|
i = iter(expr)
|
|
for (key, val) in ((self.compile(x), self.compile(y))
|
|
for (x, y) in zip(i, i)):
|
|
|
|
ret += key + val + ast.Assign(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
targets=[
|
|
ast.Subscript(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
value=target.force_expr,
|
|
slice=ast.Index(value=key.force_expr),
|
|
ctx=ast.Store())],
|
|
value=val.force_expr)
|
|
return ret
|
|
|
|
@builds("with_decorator")
|
|
@checkargs(min=1)
|
|
def compile_decorate_expression(self, expr):
|
|
expr.pop(0) # with-decorator
|
|
fn = self.compile(expr.pop(-1))
|
|
if not fn.stmts or not (isinstance(fn.stmts[-1], ast.FunctionDef) or
|
|
isinstance(fn.stmts[-1], ast.ClassDef)):
|
|
raise HyTypeError(expr, "Decorated a non-function")
|
|
decorators, ret, _ = self._compile_collect(expr)
|
|
fn.stmts[-1].decorator_list = decorators + fn.stmts[-1].decorator_list
|
|
return ret + fn
|
|
|
|
@builds("with*")
|
|
@checkargs(min=2)
|
|
def compile_with_expression(self, expr):
|
|
expr.pop(0) # with*
|
|
|
|
args = expr.pop(0)
|
|
if not isinstance(args, HyList):
|
|
raise HyTypeError(expr,
|
|
"with expects a list, received `{0}'".format(
|
|
type(args).__name__))
|
|
if len(args) < 1:
|
|
raise HyTypeError(expr, "with needs [[arg (expr)]] or [[(expr)]]]")
|
|
|
|
args.reverse()
|
|
ctx = self.compile(args.pop(0))
|
|
|
|
thing = None
|
|
if args != []:
|
|
thing = self._storeize(self.compile(args.pop(0)))
|
|
|
|
body = self._compile_branch(expr)
|
|
|
|
var = self.get_anon_var()
|
|
name = ast.Name(id=ast_str(var), arg=ast_str(var),
|
|
ctx=ast.Store(),
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
# Store the result of the body in a tempvar
|
|
body += ast.Assign(targets=[name],
|
|
value=body.force_expr,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
the_with = ast.With(context_expr=ctx.force_expr,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
optional_vars=thing,
|
|
body=body.stmts)
|
|
|
|
if PY33:
|
|
the_with.items = [ast.withitem(context_expr=ctx.force_expr,
|
|
optional_vars=thing)]
|
|
|
|
ret = ctx + the_with
|
|
# And make our expression context our temp variable
|
|
expr_name = ast.Name(id=ast_str(var), arg=ast_str(var),
|
|
ctx=ast.Load(),
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
ret += Result(expr=expr_name, temp_variables=[expr_name, name])
|
|
|
|
return ret
|
|
|
|
@builds(",")
|
|
def compile_tuple(self, expr):
|
|
expr.pop(0)
|
|
elts, ret, _ = self._compile_collect(expr)
|
|
ret += ast.Tuple(elts=elts,
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
ctx=ast.Load())
|
|
return ret
|
|
|
|
def _compile_generator_iterables(self, trailers):
|
|
"""Helper to compile the "trailing" parts of comprehensions:
|
|
generators and conditions"""
|
|
|
|
generators = trailers.pop(0)
|
|
|
|
cond = self.compile(trailers.pop(0)) if trailers != [] else Result()
|
|
|
|
gen_it = iter(generators)
|
|
paired_gens = zip(gen_it, gen_it)
|
|
|
|
gen_res = Result()
|
|
gen = []
|
|
for target, iterable in paired_gens:
|
|
comp_target = self.compile(target)
|
|
target = self._storeize(comp_target)
|
|
gen_res += self.compile(iterable)
|
|
gen.append(ast.comprehension(
|
|
target=target,
|
|
iter=gen_res.force_expr,
|
|
ifs=[]))
|
|
|
|
if cond.expr:
|
|
gen[-1].ifs.append(cond.expr)
|
|
|
|
return gen_res + cond, gen
|
|
|
|
@builds("list_comp")
|
|
@checkargs(min=2, max=3)
|
|
def compile_list_comprehension(self, expr):
|
|
# (list-comp expr (target iter) cond?)
|
|
expr.pop(0)
|
|
expression = expr.pop(0)
|
|
gen_gen = expr[0]
|
|
|
|
if not isinstance(gen_gen, HyList):
|
|
raise HyTypeError(gen_gen, "Generator expression must be a list.")
|
|
|
|
gen_res, gen = self._compile_generator_iterables(expr)
|
|
|
|
if len(gen) == 0:
|
|
raise HyTypeError(gen_gen, "Generator expression cannot be empty.")
|
|
|
|
compiled_expression = self.compile(expression)
|
|
ret = compiled_expression + gen_res
|
|
ret += ast.ListComp(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
elt=compiled_expression.force_expr,
|
|
generators=gen)
|
|
|
|
return ret
|
|
|
|
@builds("set_comp")
|
|
@checkargs(min=2, max=3)
|
|
def compile_set_comprehension(self, expr):
|
|
if PY27:
|
|
ret = self.compile_list_comprehension(expr)
|
|
expr = ret.expr
|
|
ret.expr = ast.SetComp(
|
|
lineno=expr.lineno,
|
|
col_offset=expr.col_offset,
|
|
elt=expr.elt,
|
|
generators=expr.generators)
|
|
|
|
return ret
|
|
|
|
expr[0] = HySymbol("list_comp").replace(expr[0])
|
|
expr = HyExpression([HySymbol("set"), expr]).replace(expr)
|
|
return self.compile(expr)
|
|
|
|
@builds("dict_comp")
|
|
@checkargs(min=3, max=4)
|
|
def compile_dict_comprehension(self, expr):
|
|
if PY27:
|
|
expr.pop(0) # dict-comp
|
|
key = expr.pop(0)
|
|
value = expr.pop(0)
|
|
|
|
gen_res, gen = self._compile_generator_iterables(expr)
|
|
|
|
compiled_key = self.compile(key)
|
|
compiled_value = self.compile(value)
|
|
ret = compiled_key + compiled_value + gen_res
|
|
ret += ast.DictComp(
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column,
|
|
key=compiled_key.force_expr,
|
|
value=compiled_value.force_expr,
|
|
generators=gen)
|
|
|
|
return ret
|
|
|
|
# In Python 2.6, turn (dict-comp key value [foo]) into
|
|
# (dict (list-comp (, key value) [foo]))
|
|
|
|
expr[0] = HySymbol("list_comp").replace(expr[0])
|
|
expr[1:3] = [HyExpression(
|
|
[HySymbol(",")] +
|
|
expr[1:3]
|
|
).replace(expr[1])]
|
|
expr = HyExpression([HySymbol("dict"), expr]).replace(expr)
|
|
return self.compile(expr)
|
|
|
|
@builds("genexpr")
|
|
def compile_genexpr(self, expr):
|
|
ret = self.compile_list_comprehension(expr)
|
|
expr = ret.expr
|
|
ret.expr = ast.GeneratorExp(
|
|
lineno=expr.lineno,
|
|
col_offset=expr.col_offset,
|
|
elt=expr.elt,
|
|
generators=expr.generators)
|
|
return ret
|
|
|
|
@builds("apply")
|
|
@checkargs(min=1, max=3)
|
|
def compile_apply_expression(self, expr):
|
|
expr.pop(0) # apply
|
|
|
|
ret = Result()
|
|
|
|
fun = expr.pop(0)
|
|
|
|
# We actually defer the compilation of the function call to
|
|
# @builds(HyExpression), allowing us to work on method calls
|
|
call = HyExpression([fun]).replace(fun)
|
|
|
|
if isinstance(fun, HySymbol) and fun.startswith("."):
|
|
# (apply .foo lst) needs to work as lst[0].foo(*lst[1:])
|
|
if not expr:
|
|
raise HyTypeError(
|
|
expr, "apply of a method needs to have an argument"
|
|
)
|
|
|
|
# We need to grab the arguments, and split them.
|
|
|
|
# Assign them to a variable if they're not one already
|
|
if type(expr[0]) == HyList:
|
|
if len(expr[0]) == 0:
|
|
raise HyTypeError(
|
|
expr, "apply of a method needs to have an argument"
|
|
)
|
|
call.append(expr[0].pop(0))
|
|
else:
|
|
if isinstance(expr[0], HySymbol):
|
|
tempvar = expr[0]
|
|
else:
|
|
tempvar = HySymbol(self.get_anon_var()).replace(expr[0])
|
|
assignment = HyExpression(
|
|
[HySymbol("setv"), tempvar, expr[0]]
|
|
).replace(expr[0])
|
|
|
|
# and add the assignment to our result
|
|
ret += self.compile(assignment)
|
|
|
|
# The first argument is the object on which to call the method
|
|
# So we translate (apply .foo args) to (.foo (get args 0))
|
|
call.append(HyExpression(
|
|
[HySymbol("get"), tempvar, HyInteger(0)]
|
|
).replace(tempvar))
|
|
|
|
# We then pass the other arguments to the function
|
|
expr[0] = HyExpression(
|
|
[HySymbol("cut"), tempvar, HyInteger(1)]
|
|
).replace(expr[0])
|
|
|
|
ret += self.compile(call)
|
|
|
|
if not isinstance(ret.expr, ast.Call):
|
|
raise HyTypeError(
|
|
fun, "compiling the application of `{}' didn't return a "
|
|
"function call, but `{}'".format(fun, type(ret.expr).__name__)
|
|
)
|
|
if ret.expr.starargs or ret.expr.kwargs:
|
|
raise HyTypeError(
|
|
expr, "compiling the function application returned a function "
|
|
"call with arguments"
|
|
)
|
|
|
|
if expr:
|
|
stargs = expr.pop(0)
|
|
if stargs is not None:
|
|
stargs = self.compile(stargs)
|
|
if PY35:
|
|
stargs_expr = stargs.force_expr
|
|
ret.expr.args.append(
|
|
ast.Starred(stargs_expr, ast.Load(),
|
|
lineno=stargs_expr.lineno,
|
|
col_offset=stargs_expr.col_offset)
|
|
)
|
|
else:
|
|
ret.expr.starargs = stargs.force_expr
|
|
ret = stargs + ret
|
|
|
|
if expr:
|
|
kwargs = self.compile(expr.pop(0))
|
|
if PY35:
|
|
kwargs_expr = kwargs.force_expr
|
|
ret.expr.keywords.append(
|
|
ast.keyword(None, kwargs_expr,
|
|
lineno=kwargs_expr.lineno,
|
|
col_offset=kwargs_expr.col_offset)
|
|
)
|
|
else:
|
|
ret.expr.kwargs = kwargs.force_expr
|
|
ret = kwargs + ret
|
|
|
|
return ret
|
|
|
|
@builds("not")
|
|
@builds("~")
|
|
@checkargs(1)
|
|
def compile_unary_operator(self, expression):
|
|
ops = {"not": ast.Not,
|
|
"~": ast.Invert}
|
|
operator = expression.pop(0)
|
|
operand = self.compile(expression.pop(0))
|
|
|
|
operand += ast.UnaryOp(op=ops[operator](),
|
|
operand=operand.expr,
|
|
lineno=operator.start_line,
|
|
col_offset=operator.start_column)
|
|
return operand
|
|
|
|
@builds("require")
|
|
def compile_require(self, expression):
|
|
"""
|
|
TODO: keep track of what we've imported in this run and then
|
|
"unimport" it after we've completed `thing' so that we don't pollute
|
|
other envs.
|
|
"""
|
|
expression.pop(0)
|
|
for entry in expression:
|
|
__import__(entry) # Import it fo' them macros.
|
|
require(entry, self.module_name)
|
|
return Result()
|
|
|
|
@builds("and")
|
|
@builds("or")
|
|
def compile_logical_or_and_and_operator(self, expression):
|
|
ops = {"and": (ast.And, "True"),
|
|
"or": (ast.Or, "None")}
|
|
operator = expression.pop(0)
|
|
opnode, default = ops[operator]
|
|
root_line, root_column = operator.start_line, operator.start_column
|
|
if len(expression) == 0:
|
|
return ast.Name(id=default,
|
|
ctx=ast.Load(),
|
|
lineno=root_line,
|
|
col_offset=root_column)
|
|
elif len(expression) == 1:
|
|
return self.compile(expression[0])
|
|
ret = Result()
|
|
values = list(map(self.compile, expression))
|
|
has_stmt = any(value.stmts for value in values)
|
|
if has_stmt:
|
|
# Compile it to an if...else sequence
|
|
var = self.get_anon_var()
|
|
name = ast.Name(id=var,
|
|
ctx=ast.Store(),
|
|
lineno=root_line,
|
|
col_offset=root_column)
|
|
expr_name = ast.Name(id=var,
|
|
ctx=ast.Load(),
|
|
lineno=root_line,
|
|
col_offset=root_column)
|
|
|
|
def make_assign(value, node=None):
|
|
if node is None:
|
|
line, column = root_line, root_column
|
|
else:
|
|
line, column = node.lineno, node.col_offset
|
|
return ast.Assign(targets=[ast.Name(id=var,
|
|
ctx=ast.Store(),
|
|
lineno=line,
|
|
col_offset=column)],
|
|
value=value,
|
|
lineno=line,
|
|
col_offset=column)
|
|
root = []
|
|
current = root
|
|
for i, value in enumerate(values):
|
|
if value.stmts:
|
|
node = value.stmts[0]
|
|
current.extend(value.stmts)
|
|
else:
|
|
node = value.expr
|
|
current.append(make_assign(value.force_expr, value.force_expr))
|
|
if i == len(values)-1:
|
|
# Skip a redundant 'if'.
|
|
break
|
|
if operator == "and":
|
|
cond = expr_name
|
|
elif operator == "or":
|
|
cond = ast.UnaryOp(op=ast.Not(),
|
|
operand=expr_name,
|
|
lineno=node.lineno,
|
|
col_offset=node.col_offset)
|
|
current.append(ast.If(test=cond,
|
|
body=[],
|
|
lineno=node.lineno,
|
|
col_offset=node.col_offset,
|
|
orelse=[]))
|
|
current = current[-1].body
|
|
ret = sum(root, ret)
|
|
ret += Result(expr=expr_name, temp_variables=[expr_name, name])
|
|
else:
|
|
ret += ast.BoolOp(op=opnode(),
|
|
lineno=root_line,
|
|
col_offset=root_column,
|
|
values=[value.force_expr for value in values])
|
|
return ret
|
|
|
|
@builds("=")
|
|
@builds("!=")
|
|
@builds("<")
|
|
@builds("<=")
|
|
@builds(">")
|
|
@builds(">=")
|
|
@builds("is")
|
|
@builds("in")
|
|
@builds("is_not")
|
|
@builds("not_in")
|
|
@checkargs(min=2)
|
|
def compile_compare_op_expression(self, expression):
|
|
ops = {"=": ast.Eq, "!=": ast.NotEq,
|
|
"<": ast.Lt, "<=": ast.LtE,
|
|
">": ast.Gt, ">=": ast.GtE,
|
|
"is": ast.Is, "is_not": ast.IsNot,
|
|
"in": ast.In, "not_in": ast.NotIn}
|
|
|
|
inv = expression.pop(0)
|
|
op = ops[inv]
|
|
ops = [op() for x in range(1, len(expression))]
|
|
|
|
e = expression[0]
|
|
exprs, ret, _ = self._compile_collect(expression)
|
|
|
|
return ret + ast.Compare(left=exprs[0],
|
|
ops=ops,
|
|
comparators=exprs[1:],
|
|
lineno=e.start_line,
|
|
col_offset=e.start_column)
|
|
|
|
@builds("%")
|
|
@builds("**")
|
|
@builds("<<")
|
|
@builds(">>")
|
|
@builds("|")
|
|
@builds("^")
|
|
@builds("&")
|
|
@builds_if("@", PY35)
|
|
@checkargs(min=2)
|
|
def compile_maths_expression(self, expression):
|
|
ops = {"+": ast.Add,
|
|
"/": ast.Div,
|
|
"//": ast.FloorDiv,
|
|
"*": ast.Mult,
|
|
"-": ast.Sub,
|
|
"%": ast.Mod,
|
|
"**": ast.Pow,
|
|
"<<": ast.LShift,
|
|
">>": ast.RShift,
|
|
"|": ast.BitOr,
|
|
"^": ast.BitXor,
|
|
"&": ast.BitAnd}
|
|
if PY35:
|
|
ops.update({"@": ast.MatMult})
|
|
|
|
inv = expression.pop(0)
|
|
op = ops[inv]
|
|
|
|
ret = self.compile(expression.pop(0))
|
|
for child in expression:
|
|
left_expr = ret.force_expr
|
|
ret += self.compile(child)
|
|
right_expr = ret.force_expr
|
|
ret += ast.BinOp(left=left_expr,
|
|
op=op(),
|
|
right=right_expr,
|
|
lineno=child.start_line,
|
|
col_offset=child.start_column)
|
|
return ret
|
|
|
|
@builds("+")
|
|
@builds("*")
|
|
@builds("/")
|
|
@builds("//")
|
|
def compile_maths_expression_mul(self, expression):
|
|
if len(expression) > 2:
|
|
return self.compile_maths_expression(expression)
|
|
else:
|
|
id_op = {"+": HyInteger(0), "*": HyInteger(1), "/": HyInteger(1),
|
|
"//": HyInteger(1)}
|
|
|
|
op = expression.pop(0)
|
|
arg = expression.pop(0) if expression else id_op[op]
|
|
expr = HyExpression([
|
|
HySymbol(op),
|
|
id_op[op],
|
|
arg
|
|
]).replace(expression)
|
|
return self.compile_maths_expression(expr)
|
|
|
|
@builds("-")
|
|
@checkargs(min=1)
|
|
def compile_maths_expression_sub(self, expression):
|
|
if len(expression) > 2:
|
|
return self.compile_maths_expression(expression)
|
|
else:
|
|
arg = expression[1]
|
|
ret = self.compile(arg)
|
|
ret += ast.UnaryOp(op=ast.USub(),
|
|
operand=ret.force_expr,
|
|
lineno=arg.start_line,
|
|
col_offset=arg.start_column)
|
|
return ret
|
|
|
|
@builds("+=")
|
|
@builds("/=")
|
|
@builds("//=")
|
|
@builds("*=")
|
|
@builds("_=")
|
|
@builds("%=")
|
|
@builds("**=")
|
|
@builds("<<=")
|
|
@builds(">>=")
|
|
@builds("|=")
|
|
@builds("^=")
|
|
@builds("&=")
|
|
@builds_if("@=", PY35)
|
|
@checkargs(2)
|
|
def compile_augassign_expression(self, expression):
|
|
ops = {"+=": ast.Add,
|
|
"/=": ast.Div,
|
|
"//=": ast.FloorDiv,
|
|
"*=": ast.Mult,
|
|
"_=": ast.Sub,
|
|
"%=": ast.Mod,
|
|
"**=": ast.Pow,
|
|
"<<=": ast.LShift,
|
|
">>=": ast.RShift,
|
|
"|=": ast.BitOr,
|
|
"^=": ast.BitXor,
|
|
"&=": ast.BitAnd}
|
|
if PY35:
|
|
ops.update({"@=": ast.MatMult})
|
|
|
|
op = ops[expression[0]]
|
|
|
|
target = self._storeize(self.compile(expression[1]))
|
|
ret = self.compile(expression[2])
|
|
|
|
ret += ast.AugAssign(
|
|
target=target,
|
|
value=ret.force_expr,
|
|
op=op(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
return ret
|
|
|
|
@checkargs(1)
|
|
def _compile_keyword_call(self, expression):
|
|
expression.append(expression.pop(0))
|
|
expression.insert(0, HySymbol("get"))
|
|
return self.compile(expression)
|
|
|
|
@builds(HyExpression)
|
|
def compile_expression(self, expression):
|
|
# Perform macro expansions
|
|
expression = macroexpand(expression, self.module_name)
|
|
if not isinstance(expression, HyExpression):
|
|
# Go through compile again if the type changed.
|
|
return self.compile(expression)
|
|
|
|
if expression == []:
|
|
return self.compile_list(expression)
|
|
|
|
fn = expression[0]
|
|
func = None
|
|
if isinstance(fn, HyKeyword):
|
|
return self._compile_keyword_call(expression)
|
|
|
|
if isinstance(fn, HyString):
|
|
ret = self.compile_atom(fn, expression)
|
|
if ret:
|
|
return ret
|
|
|
|
if fn.startswith("."):
|
|
# (.split "test test") -> "test test".split()
|
|
|
|
# Get the attribute name
|
|
ofn = fn
|
|
fn = HySymbol(ofn[1:])
|
|
fn.replace(ofn)
|
|
|
|
# Get the object we want to take an attribute from
|
|
if len(expression) < 2:
|
|
raise HyTypeError(expression,
|
|
"attribute access requires object")
|
|
func = self.compile(expression.pop(1))
|
|
|
|
# And get the attribute
|
|
func += ast.Attribute(lineno=fn.start_line,
|
|
col_offset=fn.start_column,
|
|
value=func.force_expr,
|
|
attr=ast_str(fn),
|
|
ctx=ast.Load())
|
|
|
|
if not func:
|
|
func = self.compile(fn)
|
|
|
|
# An exception for pulling together keyword args is if we're doing
|
|
# a typecheck, eg (type :foo)
|
|
if fn in ("type", "HyKeyword", "keyword", "name", "is_keyword"):
|
|
with_kwargs = False
|
|
else:
|
|
with_kwargs = True
|
|
|
|
args, ret, kwargs = self._compile_collect(expression[1:],
|
|
with_kwargs)
|
|
|
|
ret += ast.Call(func=func.expr,
|
|
args=args,
|
|
keywords=kwargs,
|
|
starargs=None,
|
|
kwargs=None,
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
return func + ret
|
|
|
|
@builds("def")
|
|
@builds("setv")
|
|
@checkargs(min=2)
|
|
def compile_def_expression(self, expression):
|
|
expression.pop(0)
|
|
if len(expression) == 2:
|
|
return self._compile_assign(expression[0], expression[1],
|
|
expression.start_line,
|
|
expression.start_column)
|
|
elif len(expression) % 2 != 0:
|
|
raise HyTypeError(expression,
|
|
"setv needs an even number of arguments")
|
|
else:
|
|
result = Result()
|
|
exprs = []
|
|
for tgt, target in zip(expression[::2], expression[1::2]):
|
|
item = self._compile_assign(tgt, target,
|
|
tgt.start_line, tgt.start_column)
|
|
result += item
|
|
exprs.append(item.force_expr)
|
|
|
|
result += ast.Tuple(elts=exprs, lineno=expression.start_line,
|
|
col_offset=expression.start_column,
|
|
ctx=ast.Load())
|
|
return result
|
|
|
|
def _compile_assign(self, name, result,
|
|
start_line, start_column):
|
|
|
|
str_name = "%s" % name
|
|
if _is_hy_builtin(str_name, self.module_name):
|
|
raise HyTypeError(name,
|
|
"Can't assign to a builtin: `%s'" % str_name)
|
|
|
|
result = self.compile(result)
|
|
ld_name = self.compile(name)
|
|
|
|
if isinstance(ld_name.expr, ast.Call):
|
|
raise HyTypeError(name,
|
|
"Can't assign to a callable: `%s'" % str_name)
|
|
|
|
if result.temp_variables \
|
|
and isinstance(name, HyString) \
|
|
and '.' not in name:
|
|
result.rename(name)
|
|
else:
|
|
st_name = self._storeize(ld_name)
|
|
result += ast.Assign(
|
|
lineno=start_line,
|
|
col_offset=start_column,
|
|
targets=[st_name],
|
|
value=result.force_expr)
|
|
|
|
result += ld_name
|
|
return result
|
|
|
|
@builds("for*")
|
|
@checkargs(min=1)
|
|
def compile_for_expression(self, expression):
|
|
expression.pop(0) # for
|
|
|
|
args = expression.pop(0)
|
|
|
|
if not isinstance(args, HyList):
|
|
raise HyTypeError(expression,
|
|
"for expects a list, received `{0}'".format(
|
|
type(args).__name__))
|
|
|
|
try:
|
|
target_name, iterable = args
|
|
except ValueError:
|
|
raise HyTypeError(expression,
|
|
"for requires two forms in the list")
|
|
|
|
target = self._storeize(self.compile(target_name))
|
|
|
|
ret = Result()
|
|
|
|
orel = Result()
|
|
# (for* [] body (else …))
|
|
if expression and expression[-1][0] == HySymbol("else"):
|
|
else_expr = expression.pop()
|
|
if len(else_expr) > 2:
|
|
raise HyTypeError(
|
|
else_expr,
|
|
"`else' statement in `for' is too long")
|
|
elif len(else_expr) == 2:
|
|
orel += self.compile(else_expr[1])
|
|
orel += orel.expr_as_stmt()
|
|
|
|
ret += self.compile(iterable)
|
|
|
|
body = self._compile_branch(expression)
|
|
body += body.expr_as_stmt()
|
|
|
|
ret += ast.For(lineno=expression.start_line,
|
|
col_offset=expression.start_column,
|
|
target=target,
|
|
iter=ret.force_expr,
|
|
body=body.stmts,
|
|
orelse=orel.stmts)
|
|
|
|
ret.contains_yield = body.contains_yield
|
|
|
|
return ret
|
|
|
|
@builds("while")
|
|
@checkargs(min=2)
|
|
def compile_while_expression(self, expr):
|
|
expr.pop(0) # "while"
|
|
ret = self.compile(expr.pop(0))
|
|
|
|
body = self._compile_branch(expr)
|
|
body += body.expr_as_stmt()
|
|
|
|
ret += ast.While(test=ret.force_expr,
|
|
body=body.stmts,
|
|
orelse=[],
|
|
lineno=expr.start_line,
|
|
col_offset=expr.start_column)
|
|
|
|
ret.contains_yield = body.contains_yield
|
|
|
|
return ret
|
|
|
|
@builds(HyList)
|
|
def compile_list(self, expression):
|
|
elts, ret, _ = self._compile_collect(expression)
|
|
ret += ast.List(elts=elts,
|
|
ctx=ast.Load(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
return ret
|
|
|
|
@builds(HySet)
|
|
def compile_set(self, expression):
|
|
elts, ret, _ = self._compile_collect(expression)
|
|
if PY27:
|
|
ret += ast.Set(elts=elts,
|
|
ctx=ast.Load(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
else:
|
|
ret += ast.Call(func=ast.Name(id='set',
|
|
ctx=ast.Load(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column),
|
|
args=[
|
|
ast.List(elts=elts,
|
|
ctx=ast.Load(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)],
|
|
keywords=[],
|
|
starargs=None,
|
|
kwargs=None,
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
return ret
|
|
|
|
@builds("lambda")
|
|
@builds("fn")
|
|
@checkargs(min=1)
|
|
def compile_function_def(self, expression):
|
|
called_as = expression.pop(0)
|
|
|
|
arglist = expression.pop(0)
|
|
if not isinstance(arglist, HyList):
|
|
raise HyTypeError(expression,
|
|
"First argument to (fn) must be a list")
|
|
|
|
(ret, args, defaults, stararg,
|
|
kwonlyargs, kwonlydefaults, kwargs) = self._parse_lambda_list(arglist)
|
|
for i, arg in enumerate(args):
|
|
if isinstance(arg, HyList):
|
|
# Destructuring argument
|
|
if not arg:
|
|
raise HyTypeError(arglist,
|
|
"Cannot destruct empty list")
|
|
args[i] = var = HySymbol(self.get_anon_var())
|
|
expression = HyExpression([
|
|
HyExpression([
|
|
HyString("setv"), arg, var
|
|
])]
|
|
) + expression
|
|
expression = expression.replace(arg[0])
|
|
|
|
if PY34:
|
|
# Python 3.4+ requires that args are an ast.arg object, rather
|
|
# than an ast.Name or bare string.
|
|
args = [ast.arg(arg=ast_str(x),
|
|
annotation=None, # Fix me!
|
|
lineno=x.start_line,
|
|
col_offset=x.start_column) for x in args]
|
|
|
|
kwonlyargs = [ast.arg(arg=ast_str(x), annotation=None,
|
|
lineno=x.start_line,
|
|
col_offset=x.start_column)
|
|
for x in kwonlyargs]
|
|
|
|
# XXX: Beware. Beware. This wasn't put into the parse lambda
|
|
# list because it's really just an internal parsing thing.
|
|
|
|
if kwargs:
|
|
kwargs = ast.arg(arg=kwargs, annotation=None)
|
|
|
|
if stararg:
|
|
stararg = ast.arg(arg=stararg, annotation=None)
|
|
|
|
# Let's find a better home for these guys.
|
|
else:
|
|
args = [ast.Name(arg=ast_str(x), id=ast_str(x),
|
|
ctx=ast.Param(),
|
|
lineno=x.start_line,
|
|
col_offset=x.start_column) for x in args]
|
|
|
|
if PY3:
|
|
kwonlyargs = [ast.Name(arg=ast_str(x), id=ast_str(x),
|
|
ctx=ast.Param(), lineno=x.start_line,
|
|
col_offset=x.start_column)
|
|
for x in kwonlyargs]
|
|
|
|
args = ast.arguments(
|
|
args=args,
|
|
vararg=stararg,
|
|
kwarg=kwargs,
|
|
kwonlyargs=kwonlyargs,
|
|
kw_defaults=kwonlydefaults,
|
|
defaults=defaults)
|
|
|
|
body = self._compile_branch(expression)
|
|
if not body.stmts and called_as == "lambda":
|
|
ret += ast.Lambda(
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column,
|
|
args=args,
|
|
body=body.force_expr)
|
|
|
|
return ret
|
|
|
|
if body.expr:
|
|
if body.contains_yield:
|
|
body += body.expr_as_stmt()
|
|
else:
|
|
body += ast.Return(value=body.expr,
|
|
lineno=body.expr.lineno,
|
|
col_offset=body.expr.col_offset)
|
|
|
|
if not body.stmts:
|
|
body += ast.Pass(lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
name = self.get_anon_fn()
|
|
|
|
ret += ast.FunctionDef(name=name,
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column,
|
|
args=args,
|
|
body=body.stmts,
|
|
decorator_list=[])
|
|
|
|
ast_name = ast.Name(id=name,
|
|
arg=name,
|
|
ctx=ast.Load(),
|
|
lineno=expression.start_line,
|
|
col_offset=expression.start_column)
|
|
|
|
ret += Result(expr=ast_name, temp_variables=[ast_name, ret.stmts[-1]])
|
|
|
|
return ret
|
|
|
|
@builds("defclass")
|
|
@checkargs(min=1)
|
|
def compile_class_expression(self, expressions):
|
|
expressions.pop(0) # class
|
|
|
|
class_name = expressions.pop(0)
|
|
|
|
if expressions:
|
|
base_list = expressions.pop(0)
|
|
if not isinstance(base_list, HyList):
|
|
raise HyTypeError(expressions,
|
|
"Bases class must be a list")
|
|
bases_expr, bases, _ = self._compile_collect(base_list)
|
|
else:
|
|
bases_expr = []
|
|
bases = Result()
|
|
|
|
body = Result()
|
|
|
|
# grab the doc string, if there is one
|
|
if expressions and isinstance(expressions[0], HyString):
|
|
docstring = expressions.pop(0)
|
|
symb = HySymbol("__doc__")
|
|
symb.start_line = docstring.start_line
|
|
symb.start_column = docstring.start_column
|
|
body += self._compile_assign(symb, docstring,
|
|
docstring.start_line,
|
|
docstring.start_column)
|
|
body += body.expr_as_stmt()
|
|
|
|
if expressions and isinstance(expressions[0], HyList) \
|
|
and not isinstance(expressions[0], HyExpression):
|
|
expr = expressions.pop(0)
|
|
body += self.compile(
|
|
HyExpression([
|
|
HySymbol("setv")
|
|
] + expr).replace(expr)
|
|
)
|
|
|
|
for expression in expressions:
|
|
body += self.compile(macroexpand(expression, self.module_name))
|
|
|
|
if not body.stmts:
|
|
body += ast.Pass(lineno=expressions.start_line,
|
|
col_offset=expressions.start_column)
|
|
|
|
return bases + ast.ClassDef(
|
|
lineno=expressions.start_line,
|
|
col_offset=expressions.start_column,
|
|
decorator_list=[],
|
|
name=ast_str(class_name),
|
|
keywords=[],
|
|
starargs=None,
|
|
kwargs=None,
|
|
bases=bases_expr,
|
|
body=body.stmts)
|
|
|
|
def _compile_time_hack(self, expression):
|
|
"""Compile-time hack: we want to get our new macro now
|
|
We must provide __name__ in the namespace to make the Python
|
|
compiler set the __module__ attribute of the macro function."""
|
|
hy.importer.hy_eval(expression,
|
|
compile_time_ns(self.module_name),
|
|
self.module_name)
|
|
|
|
# We really want to have a `hy` import to get hy.macro in
|
|
ret = self.compile(expression)
|
|
ret.add_imports('hy', [None])
|
|
return ret
|
|
|
|
@builds("defmacro")
|
|
@checkargs(min=1)
|
|
def compile_macro(self, expression):
|
|
expression.pop(0)
|
|
name = expression.pop(0)
|
|
if not isinstance(name, HySymbol):
|
|
raise HyTypeError(name, ("received a `%s' instead of a symbol "
|
|
"for macro name" % type(name).__name__))
|
|
name = HyString(name).replace(name)
|
|
new_expression = HyExpression([
|
|
HySymbol("with_decorator"),
|
|
HyExpression([HySymbol("hy.macros.macro"), name]),
|
|
HyExpression([HySymbol("fn")] + expression),
|
|
]).replace(expression)
|
|
|
|
ret = self._compile_time_hack(new_expression)
|
|
|
|
return ret
|
|
|
|
@builds("defreader")
|
|
@checkargs(min=2)
|
|
def compile_reader(self, expression):
|
|
expression.pop(0)
|
|
name = expression.pop(0)
|
|
NOT_READERS = [":", "&"]
|
|
if name in NOT_READERS or len(name) > 1:
|
|
raise NameError("%s can't be used as a macro reader symbol" % name)
|
|
if not isinstance(name, HySymbol):
|
|
raise HyTypeError(name,
|
|
("received a `%s' instead of a symbol "
|
|
"for reader macro name" % type(name).__name__))
|
|
name = HyString(name).replace(name)
|
|
new_expression = HyExpression([
|
|
HySymbol("with_decorator"),
|
|
HyExpression([HySymbol("hy.macros.reader"), name]),
|
|
HyExpression([HySymbol("fn")] + expression),
|
|
]).replace(expression)
|
|
|
|
ret = self._compile_time_hack(new_expression)
|
|
|
|
return ret
|
|
|
|
@builds("dispatch_reader_macro")
|
|
@checkargs(exact=2)
|
|
def compile_dispatch_reader_macro(self, expression):
|
|
expression.pop(0) # dispatch-reader-macro
|
|
str_char = expression.pop(0)
|
|
if not type(str_char) == HyString:
|
|
raise HyTypeError(
|
|
str_char,
|
|
"Trying to expand a reader macro using `{0}' instead "
|
|
"of string".format(type(str_char).__name__),
|
|
)
|
|
|
|
module = self.module_name
|
|
expr = reader_macroexpand(str_char, expression.pop(0), module)
|
|
|
|
return self.compile(expr)
|
|
|
|
@builds("eval_and_compile")
|
|
def compile_eval_and_compile(self, expression):
|
|
expression[0] = HySymbol("do")
|
|
hy.importer.hy_eval(expression,
|
|
compile_time_ns(self.module_name),
|
|
self.module_name)
|
|
expression.pop(0)
|
|
return self._compile_branch(expression)
|
|
|
|
@builds("eval_when_compile")
|
|
def compile_eval_when_compile(self, expression):
|
|
expression[0] = HySymbol("do")
|
|
hy.importer.hy_eval(expression,
|
|
compile_time_ns(self.module_name),
|
|
self.module_name)
|
|
return Result()
|
|
|
|
@builds(HyCons)
|
|
def compile_cons(self, cons):
|
|
raise HyTypeError(cons, "Can't compile a top-level cons cell")
|
|
|
|
@builds(HyInteger)
|
|
def compile_integer(self, number):
|
|
return ast.Num(n=long_type(number),
|
|
lineno=number.start_line,
|
|
col_offset=number.start_column)
|
|
|
|
@builds(HyFloat)
|
|
def compile_float(self, number):
|
|
return ast.Num(n=float(number),
|
|
lineno=number.start_line,
|
|
col_offset=number.start_column)
|
|
|
|
@builds(HyComplex)
|
|
def compile_complex(self, number):
|
|
return ast.Num(n=complex(number),
|
|
lineno=number.start_line,
|
|
col_offset=number.start_column)
|
|
|
|
@builds(HySymbol)
|
|
def compile_symbol(self, symbol):
|
|
if "." in symbol:
|
|
glob, local = symbol.rsplit(".", 1)
|
|
glob = HySymbol(glob).replace(symbol)
|
|
ret = self.compile_symbol(glob)
|
|
|
|
ret = ast.Attribute(
|
|
lineno=symbol.start_line,
|
|
col_offset=symbol.start_column,
|
|
value=ret,
|
|
attr=ast_str(local),
|
|
ctx=ast.Load()
|
|
)
|
|
return ret
|
|
|
|
if symbol in _stdlib:
|
|
self.imports[_stdlib[symbol]].add(symbol)
|
|
|
|
return ast.Name(id=ast_str(symbol),
|
|
arg=ast_str(symbol),
|
|
ctx=ast.Load(),
|
|
lineno=symbol.start_line,
|
|
col_offset=symbol.start_column)
|
|
|
|
@builds(HyString)
|
|
def compile_string(self, string):
|
|
return ast.Str(s=str_type(string),
|
|
lineno=string.start_line,
|
|
col_offset=string.start_column)
|
|
|
|
@builds(HyKeyword)
|
|
def compile_keyword(self, keyword):
|
|
return ast.Str(s=str_type(keyword),
|
|
lineno=keyword.start_line,
|
|
col_offset=keyword.start_column)
|
|
|
|
@builds(HyDict)
|
|
def compile_dict(self, m):
|
|
keyvalues, ret, _ = self._compile_collect(m)
|
|
|
|
ret += ast.Dict(lineno=m.start_line,
|
|
col_offset=m.start_column,
|
|
keys=keyvalues[::2],
|
|
values=keyvalues[1::2])
|
|
return ret
|
|
|
|
|
|
def hy_compile(tree, module_name, root=ast.Module, get_expr=False):
|
|
"""
|
|
Compile a HyObject tree into a Python AST Module.
|
|
|
|
If `get_expr` is True, return a tuple (module, last_expression), where
|
|
`last_expression` is the.
|
|
"""
|
|
|
|
if hasattr(sys, "subversion"):
|
|
implementation = sys.subversion[0].lower()
|
|
elif hasattr(sys, "implementation"):
|
|
implementation = sys.implementation.name.lower()
|
|
|
|
body = []
|
|
expr = None
|
|
|
|
if tree:
|
|
compiler = HyASTCompiler(module_name)
|
|
result = compiler.compile(tree)
|
|
expr = result.force_expr
|
|
|
|
if not get_expr:
|
|
result += result.expr_as_stmt()
|
|
|
|
if isinstance(tree, list):
|
|
spoof_tree = tree[0]
|
|
else:
|
|
spoof_tree = tree
|
|
body = compiler.imports_as_stmts(spoof_tree) + result.stmts
|
|
|
|
ret = root(body=body)
|
|
|
|
# PyPy _really_ doesn't like the ast going backwards...
|
|
if implementation != "cpython":
|
|
for node in ast.walk(ret):
|
|
node.lineno = 1
|
|
node.col_offset = 1
|
|
|
|
if get_expr:
|
|
expr = ast.Expression(body=expr)
|
|
ret = (ret, expr)
|
|
|
|
return ret
|