2205 lines
79 KiB
Python
Executable File
2205 lines
79 KiB
Python
Executable File
# -*- encoding: utf-8 -*-
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# Copyright 2018 the authors.
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# This file is part of Hy, which is free software licensed under the Expat
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# license. See the LICENSE.
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from hy.models import (HyObject, HyExpression, HyKeyword, HyInteger, HyComplex,
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HyString, HyBytes, HySymbol, HyFloat, HyList, HySet,
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HyDict, HySequence, wrap_value)
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from hy.errors import HyCompileError, HyTypeError
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from hy.lex.parser import mangle
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import hy.macros
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from hy._compat import (
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str_type, string_types, bytes_type, long_type, PY3, PY35, PY37,
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raise_empty)
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from hy.macros import require, macroexpand, tag_macroexpand
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import hy.importer
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import hy.inspect
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import traceback
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import importlib
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import ast
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import sys
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import copy
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from collections import defaultdict
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from cmath import isnan
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if PY3:
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import builtins
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else:
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import __builtin__ as builtins
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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 map(ast_str, mod.EXPORTS):
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if getattr(mod, e) is not getattr(builtins, e, ''):
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# Don't bother putting a name in _stdlib if it
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# points to a builtin with the same name. This
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# prevents pointless imports.
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_stdlib[e] = module
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_compile_table = {}
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_decoratables = (ast.FunctionDef, ast.ClassDef)
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if PY35:
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_decoratables += (ast.AsyncFunctionDef,)
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def ast_str(x, piecewise=False):
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if piecewise:
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return ".".join(ast_str(s) if s else "" for s in x.split("."))
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x = mangle(x)
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return x if PY3 else x.encode('UTF8')
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def builds(*types, **kwargs):
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# A decorator that adds the decorated method to _compile_table for
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# compiling `types`, but only if kwargs['iff'] (if provided) is
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# true.
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if not kwargs.get('iff', True):
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return lambda fn: fn
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def _dec(fn):
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for t in types:
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if isinstance(t, string_types):
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t = ast_str(t)
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_compile_table[t] = fn
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return fn
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return _dec
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def spoof_positions(obj):
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if not isinstance(obj, HyObject):
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return
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if not hasattr(obj, "start_column"):
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obj.start_column = 0
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if not hasattr(obj, "start_line"):
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obj.start_line = 0
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if (hasattr(obj, "__iter__") and
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not isinstance(obj, (string_types, bytes_type))):
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for x in obj:
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spoof_positions(x)
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# Provide asty.Foo(x, ...) as shorthand for
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# ast.Foo(..., lineno=x.start_line, col_offset=x.start_column) or
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# ast.Foo(..., lineno=x.lineno, col_offset=x.col_offset)
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class Asty(object):
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def __getattr__(self, name):
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setattr(Asty, name, lambda self, x, **kwargs: getattr(ast, name)(
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lineno=getattr(
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x, 'start_line', getattr(x, 'lineno', None)),
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col_offset=getattr(
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x, 'start_column', getattr(x, 'col_offset', None)),
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**kwargs))
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return getattr(self, name)
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asty = Asty()
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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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ctx=ast.Load(),
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lineno=lineno,
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col_offset=col_offset)
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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() + asty.Expr(self.expr, 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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elif PY35 and isinstance(var, ast.AsyncFunctionDef):
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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 _nargs(n):
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return "%d argument%s" % (n, ("" if n == 1 else "s"))
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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 %s, got %%d" % _nargs(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 %s, got %%d." % _nargs(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 %s, got %%d" % _nargs(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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def is_unpack(kind, x):
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return (isinstance(x, HyExpression)
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and len(x) > 0
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and isinstance(x[0], HySymbol)
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and x[0] == "unpack-" + kind)
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def ends_with_else(expr):
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return (expr and
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isinstance(expr[-1], HyExpression) and
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expr[-1] and
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isinstance(expr[-1][0], HySymbol) and
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expr[-1][0] == HySymbol("else"))
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class HyASTCompiler(object):
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def __init__(self, module_name):
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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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self.temp_if = None
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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 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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e = HyExpression([
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HySymbol("import"),
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HySymbol(module),
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]).replace(expr)
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spoof_positions(e)
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ret += self.compile(e)
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names = sorted(name for name in names if name)
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if names:
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e = 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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spoof_positions(e)
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ret += self.compile(e)
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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 isinstance(atom_type, string_types):
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atom_type = ast_str(atom_type)
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if atom_type in _compile_table:
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# _compile_table[atom_type] is a method for compiling this
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# type of atom, so call it. If it has an extra parameter,
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# pass in `atom_type`.
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atom_compiler = _compile_table[atom_type]
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arity = hy.inspect.get_arity(atom_compiler)
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# Compliation methods may mutate the atom, so copy it first.
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atom = copy.copy(atom)
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ret = (atom_compiler(self, atom, atom_type)
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if arity == 3
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else atom_compiler(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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if not isinstance(atom, HyObject):
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atom = wrap_value(atom)
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if isinstance(atom, HyObject):
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spoof_positions(atom)
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return self.compile_atom(type(atom), atom)
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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, dict_display=False,
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oldpy_unpack=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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oldpy_starargs = None
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oldpy_kwargs = None
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exprs_iter = iter(exprs)
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for expr in exprs_iter:
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if not PY35 and oldpy_unpack and is_unpack("iterable", expr):
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if oldpy_starargs:
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raise HyTypeError(expr, "Pythons < 3.5 allow only one "
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"`unpack-iterable` per call")
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oldpy_starargs = self.compile(expr[1])
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ret += oldpy_starargs
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oldpy_starargs = oldpy_starargs.force_expr
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elif is_unpack("mapping", expr):
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ret += self.compile(expr[1])
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if PY35:
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if dict_display:
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compiled_exprs.append(None)
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compiled_exprs.append(ret.force_expr)
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elif with_kwargs:
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keywords.append(asty.keyword(
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expr, arg=None, value=ret.force_expr))
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elif oldpy_unpack:
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if oldpy_kwargs:
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raise HyTypeError(expr, "Pythons < 3.5 allow only one "
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"`unpack-mapping` per call")
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oldpy_kwargs = ret.force_expr
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elif 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=expr))
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|
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if not expr:
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raise HyTypeError(expr, "Can't call a function with the "
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"empty keyword")
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compiled_value = self.compile(value)
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ret += compiled_value
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arg = str_type(expr)[1:]
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keywords.append(asty.keyword(
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expr, arg=ast_str(arg), value=compiled_value.force_expr))
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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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if oldpy_unpack:
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return compiled_exprs, ret, keywords, oldpy_starargs, oldpy_kwargs
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else:
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return compiled_exprs, ret, keywords
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|
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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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|
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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", "&kwonly", "&kwargs")
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ret = Result()
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args = []
|
|
defaults = []
|
|
varargs = None
|
|
kwonlyargs = []
|
|
kwonlydefaults = []
|
|
kwargs = None
|
|
lambda_keyword = None
|
|
|
|
for expr in exprs:
|
|
|
|
if expr in ll_keywords:
|
|
if expr in ("&optional", "&rest", "&kwonly", "&kwargs"):
|
|
lambda_keyword = expr
|
|
else:
|
|
raise HyTypeError(expr,
|
|
"{0} is in an invalid "
|
|
"position.".format(repr(expr)))
|
|
# we don't actually care about this token, so we set
|
|
# our state and continue to the next token...
|
|
continue
|
|
|
|
if lambda_keyword is None:
|
|
if not isinstance(expr, HySymbol):
|
|
raise HyTypeError(expr, "Parameters must be symbols")
|
|
args.append(expr)
|
|
elif lambda_keyword == "&rest":
|
|
if varargs:
|
|
raise HyTypeError(expr,
|
|
"There can only be one "
|
|
"&rest argument")
|
|
varargs = 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)
|
|
if not isinstance(k, HyString):
|
|
raise HyTypeError(expr,
|
|
"Only strings can be used as "
|
|
"parameter names")
|
|
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 = expr
|
|
|
|
return ret, args, defaults, varargs, kwonlyargs, kwonlydefaults, kwargs
|
|
|
|
def _storeize(self, expr, 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 HyTypeError(expr,
|
|
"Can't assign or 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(expr, x, func))
|
|
new_name = typ(elts=new_elts)
|
|
elif isinstance(name, ast.Name):
|
|
new_name = ast.Name(id=name.id)
|
|
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)
|
|
elif PY3 and isinstance(name, ast.Starred):
|
|
new_name = ast.Starred(
|
|
value=self._storeize(expr, name.value, func))
|
|
else:
|
|
raise HyTypeError(expr,
|
|
"Can't assign or delete a %s" %
|
|
type(expr).__name__)
|
|
|
|
new_name.ctx = func()
|
|
ast.copy_location(new_name, name)
|
|
return new_name
|
|
|
|
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, HySequence):
|
|
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"),
|
|
HyExpression([HySymbol("or"), f_contents, HyList()])])
|
|
else:
|
|
to_add = HyList([f_contents])
|
|
|
|
contents.append(to_add)
|
|
|
|
return imports, HyExpression([HySymbol(name),
|
|
contents]).replace(form), False
|
|
|
|
elif isinstance(form, HySymbol):
|
|
return imports, HyExpression([HySymbol(name),
|
|
HyString(form)]).replace(form), False
|
|
|
|
elif isinstance(form, HyKeyword):
|
|
return imports, form, False
|
|
|
|
elif isinstance(form, HyString):
|
|
x = [HySymbol(name), form]
|
|
if form.brackets is not None:
|
|
x.extend([HyKeyword("brackets"), form.brackets])
|
|
return imports, HyExpression(x).replace(form), False
|
|
|
|
return imports, HyExpression([HySymbol(name),
|
|
form]).replace(form), False
|
|
|
|
@builds("quote", "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", "unquote-splice")
|
|
def compile_unquote(self, expr):
|
|
raise HyTypeError(expr,
|
|
"`%s' can't be used at the top-level" % expr[0])
|
|
|
|
@builds("unpack-iterable")
|
|
@checkargs(exact=1)
|
|
def compile_unpack_iterable(self, expr):
|
|
if not PY3:
|
|
raise HyTypeError(expr, "`unpack-iterable` isn't allowed here")
|
|
ret = self.compile(expr[1])
|
|
ret += asty.Starred(expr, value=ret.force_expr, ctx=ast.Load())
|
|
return ret
|
|
|
|
@builds("unpack-mapping")
|
|
@checkargs(exact=1)
|
|
def compile_unpack_mapping(self, expr):
|
|
raise HyTypeError(expr, "`unpack-mapping` isn't allowed here")
|
|
|
|
@builds("exec*", iff=(not PY3))
|
|
# Under Python 3, `exec` is a function rather than a statement type, so Hy
|
|
# doesn't need a special form for it.
|
|
@checkargs(min=1, max=3)
|
|
def compile_exec(self, expr):
|
|
expr.pop(0)
|
|
return asty.Exec(
|
|
expr,
|
|
body=self.compile(expr.pop(0)).force_expr,
|
|
globals=self.compile(expr.pop(0)).force_expr if expr else None,
|
|
locals=self.compile(expr.pop(0)).force_expr if expr else None)
|
|
|
|
@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 += asty.Raise(
|
|
expr, type=ret.expr, exc=ret.expr,
|
|
inst=None, tback=None, cause=cause)
|
|
|
|
return ret
|
|
|
|
@builds("try")
|
|
@checkargs(min=2)
|
|
def compile_try_expression(self, expr):
|
|
expr = copy.deepcopy(expr)
|
|
expr.pop(0) # try
|
|
|
|
# (try something somethingelse…)
|
|
body = []
|
|
# Check against HyExpression and HySymbol to avoid incorrectly
|
|
# matching [except ...] or ("except" ...)
|
|
while expr and not (isinstance(expr[0], HyExpression)
|
|
and isinstance(expr[0][0], HySymbol)
|
|
and expr[0][0] in ("except", "else", "finally")):
|
|
body.append(expr.pop(0))
|
|
body = self._compile_branch(body)
|
|
|
|
var = self.get_anon_var()
|
|
name = asty.Name(expr, id=ast_str(var), ctx=ast.Store())
|
|
expr_name = asty.Name(expr, id=ast_str(var), ctx=ast.Load())
|
|
|
|
returnable = Result(expr=expr_name, temp_variables=[expr_name, name],
|
|
contains_yield=body.contains_yield)
|
|
|
|
handler_results = Result()
|
|
handlers = []
|
|
while expr and expr[0][0] == HySymbol("except"):
|
|
handler_results += self._compile_catch_expression(expr.pop(0),
|
|
name)
|
|
handlers.append(handler_results.stmts.pop())
|
|
orelse = []
|
|
if expr and expr[0][0] == HySymbol("else"):
|
|
orelse = self._compile_branch(expr.pop(0)[1:])
|
|
orelse += asty.Assign(expr, targets=[name],
|
|
value=orelse.force_expr)
|
|
orelse += orelse.expr_as_stmt()
|
|
orelse = orelse.stmts
|
|
finalbody = []
|
|
if expr and expr[0][0] == HySymbol("finally"):
|
|
finalbody = self._compile_branch(expr.pop(0)[1:])
|
|
finalbody += finalbody.expr_as_stmt()
|
|
finalbody = finalbody.stmts
|
|
if expr:
|
|
if expr[0][0] in ("except", "else", "finally"):
|
|
raise HyTypeError(expr, "Incorrect order "
|
|
"of `except'/`else'/`finally' in `try'")
|
|
raise HyTypeError(expr, "Unknown expression in `try'")
|
|
|
|
# Using (else) without (except) is verboten!
|
|
if orelse and not handlers:
|
|
raise HyTypeError(
|
|
expr,
|
|
"`try' cannot have `else' without `except'")
|
|
# Likewise a bare (try) or (try BODY).
|
|
if not (handlers or finalbody):
|
|
raise HyTypeError(
|
|
expr,
|
|
"`try' must have an `except' or `finally' clause")
|
|
|
|
ret = handler_results
|
|
|
|
body += body.expr_as_stmt() if orelse else asty.Assign(
|
|
expr, targets=[name], value=body.force_expr)
|
|
body = body.stmts or [asty.Pass(expr)]
|
|
|
|
if PY3:
|
|
# Python 3.3 features a merge of TryExcept+TryFinally into Try.
|
|
return ret + asty.Try(
|
|
expr,
|
|
body=body,
|
|
handlers=handlers,
|
|
orelse=orelse,
|
|
finalbody=finalbody) + returnable
|
|
|
|
if finalbody:
|
|
if handlers:
|
|
return ret + asty.TryFinally(
|
|
expr,
|
|
body=[asty.TryExcept(
|
|
expr,
|
|
handlers=handlers,
|
|
body=body,
|
|
orelse=orelse)],
|
|
finalbody=finalbody) + returnable
|
|
|
|
return ret + asty.TryFinally(
|
|
expr, body=body, finalbody=finalbody) + returnable
|
|
|
|
return ret + asty.TryExcept(
|
|
expr, handlers=handlers, body=body, orelse=orelse) + returnable
|
|
|
|
@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
|
|
|
|
if not expr:
|
|
raise HyTypeError(expr, "`%s' missing exceptions list" % catch)
|
|
exceptions = expr.pop(0)
|
|
|
|
# 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
|
|
name = None
|
|
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(name, self.compile(name))
|
|
|
|
exceptions_list = exceptions.pop(0) if exceptions else []
|
|
|
|
if isinstance(exceptions_list, list):
|
|
if len(exceptions_list):
|
|
# [FooBar BarFoo] → catch Foobar and BarFoo exceptions
|
|
elts, _type, _ = self._compile_collect(exceptions_list)
|
|
_type += asty.Tuple(expr, elts=elts, ctx=ast.Load())
|
|
else:
|
|
# [] → all exceptions caught
|
|
_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 += asty.Assign(expr, targets=[var], value=body.force_expr)
|
|
body += body.expr_as_stmt()
|
|
|
|
body = body.stmts
|
|
if not body:
|
|
body = [asty.Pass(expr)]
|
|
|
|
# use _type.expr to get a literal `None`
|
|
return _type + asty.ExceptHandler(
|
|
expr, 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()
|
|
nested = root = False
|
|
if expression:
|
|
orel_expr = expression.pop(0)
|
|
if isinstance(orel_expr, HyExpression) and isinstance(orel_expr[0],
|
|
HySymbol) and orel_expr[0] == 'if*':
|
|
# Nested ifs: don't waste temporaries
|
|
root = self.temp_if is None
|
|
nested = True
|
|
self.temp_if = self.temp_if or self.get_anon_var()
|
|
orel = self.compile(orel_expr)
|
|
|
|
if not cond.stmts and isinstance(cond.force_expr, ast.Name):
|
|
name = cond.force_expr.id
|
|
branch = None
|
|
if name == 'True':
|
|
branch = body
|
|
elif name in ('False', 'None'):
|
|
branch = orel
|
|
if branch is not None:
|
|
if self.temp_if and branch.stmts:
|
|
name = asty.Name(expression,
|
|
id=ast_str(self.temp_if),
|
|
ctx=ast.Store())
|
|
|
|
branch += asty.Assign(expression,
|
|
targets=[name],
|
|
value=body.force_expr)
|
|
|
|
return branch
|
|
|
|
# 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.temp_if or self.get_anon_var()
|
|
name = asty.Name(expression,
|
|
id=ast_str(var),
|
|
ctx=ast.Store())
|
|
|
|
# Store the result of the body
|
|
body += asty.Assign(expression,
|
|
targets=[name],
|
|
value=body.force_expr)
|
|
|
|
# and of the else clause
|
|
if not nested or not orel.stmts or (not root and
|
|
var != self.temp_if):
|
|
orel += asty.Assign(expression,
|
|
targets=[name],
|
|
value=orel.force_expr)
|
|
|
|
# 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 = asty.Name(expression, id=ast_str(var), ctx=ast.Load())
|
|
|
|
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)
|
|
|
|
if root:
|
|
self.temp_if = None
|
|
|
|
return ret
|
|
|
|
@builds("break")
|
|
@checkargs(0)
|
|
def compile_break_expression(self, expr):
|
|
return asty.Break(expr)
|
|
|
|
@builds("continue")
|
|
@checkargs(0)
|
|
def compile_continue_expression(self, expr):
|
|
return asty.Continue(expr)
|
|
|
|
@builds("assert")
|
|
@checkargs(min=1, max=2)
|
|
def compile_assert_expression(self, expr):
|
|
expr.pop(0) # assert
|
|
ret = self.compile(expr.pop(0))
|
|
e = ret.force_expr
|
|
msg = None
|
|
if expr:
|
|
msg = self.compile(expr.pop(0)).force_expr
|
|
return ret + asty.Assert(expr, test=e, msg=msg)
|
|
|
|
@builds("global")
|
|
@builds("nonlocal", iff=PY3)
|
|
@checkargs(min=1)
|
|
def compile_global_or_nonlocal(self, expr):
|
|
form = expr.pop(0)
|
|
names = []
|
|
while len(expr) > 0:
|
|
identifier = expr.pop(0)
|
|
name = ast_str(identifier)
|
|
names.append(name)
|
|
if not isinstance(identifier, HySymbol):
|
|
raise HyTypeError(
|
|
identifier,
|
|
"({}) arguments must be Symbols".format(form))
|
|
node = asty.Global if form == "global" else asty.Nonlocal
|
|
return node(expr, names=names)
|
|
|
|
@builds("yield")
|
|
@checkargs(max=1)
|
|
def compile_yield_expression(self, expr):
|
|
ret = Result(contains_yield=(not PY3))
|
|
if len(expr) > 1:
|
|
ret += self.compile(expr[1])
|
|
return ret + asty.Yield(expr, value=ret.force_expr)
|
|
|
|
@builds("yield-from", iff=PY3)
|
|
@builds("await", iff=PY35)
|
|
@checkargs(1)
|
|
def compile_yield_from_or_await_expression(self, expr):
|
|
ret = Result() + self.compile(expr[1])
|
|
node = asty.YieldFrom if expr[0] == "yield-from" else asty.Await
|
|
return ret + node(expr, value=ret.force_expr)
|
|
|
|
@builds("import")
|
|
def compile_import_expression(self, expr):
|
|
expr = copy.deepcopy(expr)
|
|
def _compile_import(expr, module, names=None, importer=asty.Import):
|
|
if not names:
|
|
names = [ast.alias(name=ast_str(module, piecewise=True), asname=None)]
|
|
|
|
ast_module = ast_str(module, piecewise=True)
|
|
module = ast_module.lstrip(".")
|
|
level = len(ast_module) - len(module)
|
|
if not module:
|
|
module = None
|
|
|
|
return Result() + importer(
|
|
expr, module=module, names=names, level=level)
|
|
|
|
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 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, piecewise=True),
|
|
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=(str(sym) if sym == "*" else ast_str(sym)),
|
|
asname=alias))
|
|
|
|
rimports += _compile_import(expr, module,
|
|
names, asty.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
|
|
|
|
indices, ret, _ = self._compile_collect(expr[1:])
|
|
ret += self.compile(expr[0])
|
|
|
|
for ix in indices:
|
|
ret += asty.Subscript(
|
|
expr,
|
|
value=ret.force_expr,
|
|
slice=ast.Index(value=ix),
|
|
ctx=ast.Load())
|
|
|
|
return ret
|
|
|
|
@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 += asty.Attribute(attr,
|
|
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[0])
|
|
ret = compiled_attr + ret + asty.Subscript(
|
|
attr,
|
|
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")
|
|
def compile_del_expression(self, expr):
|
|
root = expr.pop(0)
|
|
if not expr:
|
|
return asty.Pass(root)
|
|
|
|
del_targets = []
|
|
ret = Result()
|
|
for target in expr:
|
|
compiled_target = self.compile(target)
|
|
ret += compiled_target
|
|
del_targets.append(self._storeize(target, compiled_target,
|
|
ast.Del))
|
|
|
|
return ret + asty.Delete(expr, targets=del_targets)
|
|
|
|
@builds("cut")
|
|
@checkargs(min=1, max=4)
|
|
def compile_cut_expression(self, expr):
|
|
ret = Result()
|
|
nodes = [None] * 4
|
|
for i, e in enumerate(expr[1:]):
|
|
ret += self.compile(e)
|
|
nodes[i] = ret.force_expr
|
|
|
|
return ret + asty.Subscript(
|
|
expr,
|
|
value=nodes[0],
|
|
slice=ast.Slice(lower=nodes[1], upper=nodes[2], step=nodes[3]),
|
|
ctx=ast.Load())
|
|
|
|
@builds("with-decorator")
|
|
@checkargs(min=1)
|
|
def compile_decorate_expression(self, expr):
|
|
expr.pop(0) # with-decorator
|
|
fn = self.compile(expr.pop())
|
|
if not fn.stmts or not isinstance(fn.stmts[-1], _decoratables):
|
|
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*")
|
|
@builds("with/a*", iff=PY35)
|
|
@checkargs(min=2)
|
|
def compile_with_expression(self, expr):
|
|
root = expr.pop(0)
|
|
|
|
args = expr.pop(0)
|
|
if not isinstance(args, HyList):
|
|
raise HyTypeError(expr,
|
|
"{0} expects a list, received `{1}'".format(
|
|
root, type(args).__name__))
|
|
if len(args) not in (1, 2):
|
|
raise HyTypeError(expr,
|
|
"{0} needs [arg (expr)] or [(expr)]".format(root))
|
|
|
|
thing = None
|
|
if len(args) == 2:
|
|
thing = self._storeize(args[0], self.compile(args.pop(0)))
|
|
ctx = self.compile(args.pop(0))
|
|
|
|
body = self._compile_branch(expr)
|
|
|
|
# Store the result of the body in a tempvar
|
|
var = self.get_anon_var()
|
|
name = asty.Name(expr, id=ast_str(var), ctx=ast.Store())
|
|
body += asty.Assign(expr, targets=[name], value=body.force_expr)
|
|
# Initialize the tempvar to None in case the `with` exits
|
|
# early with an exception.
|
|
initial_assign = asty.Assign(
|
|
expr, targets=[name], value=asty.Name(
|
|
expr, id=ast_str("None"), ctx=ast.Load()))
|
|
|
|
node = asty.With if root == "with*" else asty.AsyncWith
|
|
the_with = node(expr,
|
|
context_expr=ctx.force_expr,
|
|
optional_vars=thing,
|
|
body=body.stmts)
|
|
|
|
if PY3:
|
|
the_with.items = [ast.withitem(context_expr=ctx.force_expr,
|
|
optional_vars=thing)]
|
|
|
|
ret = Result(stmts=[initial_assign]) + ctx + the_with
|
|
ret.contains_yield = ret.contains_yield or body.contains_yield
|
|
# And make our expression context our temp variable
|
|
expr_name = asty.Name(expr, id=ast_str(var), ctx=ast.Load())
|
|
|
|
ret += Result(expr=expr_name)
|
|
# We don't give the Result any temp_vars because we don't want
|
|
# Result.rename to touch `name`. Otherwise, initial_assign will
|
|
# clobber any preexisting value of the renamed-to variable.
|
|
|
|
return ret
|
|
|
|
@builds(",")
|
|
def compile_tuple(self, expr):
|
|
elts, ret, _ = self._compile_collect(expr[1:])
|
|
return ret + asty.Tuple(expr, elts=elts, ctx=ast.Load())
|
|
|
|
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:
|
|
gen_res += self.compile(iterable)
|
|
gen.append(ast.comprehension(
|
|
target=self._storeize(target, self.compile(target)),
|
|
iter=gen_res.force_expr,
|
|
ifs=[],
|
|
is_async=False))
|
|
|
|
if cond.expr:
|
|
gen[-1].ifs.append(cond.expr)
|
|
|
|
return gen_res + cond, gen
|
|
|
|
@builds("list-comp", "set-comp", "genexpr")
|
|
@checkargs(min=2, max=3)
|
|
def compile_comprehension(self, expr):
|
|
# (list-comp expr (target iter) cond?)
|
|
form = 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.")
|
|
|
|
ret = self.compile(expression)
|
|
node_class = (
|
|
asty.ListComp if form == "list-comp" else
|
|
asty.SetComp if form == "set-comp" else
|
|
asty.GeneratorExp)
|
|
return ret + gen_res + node_class(
|
|
expr, elt=ret.force_expr, generators=gen)
|
|
|
|
@builds("dict-comp")
|
|
@checkargs(min=3, max=4)
|
|
def compile_dict_comprehension(self, expr):
|
|
expr.pop(0) # dict-comp
|
|
key = self.compile(expr.pop(0))
|
|
value = self.compile(expr.pop(0))
|
|
|
|
gen_res, gen = self._compile_generator_iterables(expr)
|
|
|
|
return key + value + gen_res + asty.DictComp(
|
|
expr,
|
|
key=key.force_expr,
|
|
value=value.force_expr,
|
|
generators=gen)
|
|
|
|
@builds("not", "~")
|
|
@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 += asty.UnaryOp(
|
|
expression, op=ops[operator](), operand=operand.force_expr)
|
|
|
|
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.
|
|
"""
|
|
for entry in expression[1:]:
|
|
if isinstance(entry, HySymbol):
|
|
# e.g., (require foo)
|
|
__import__(entry)
|
|
require(entry, self.module_name, all_macros=True,
|
|
prefix=entry)
|
|
elif isinstance(entry, HyList) and len(entry) == 2:
|
|
# e.g., (require [foo [bar baz :as MyBaz bing]])
|
|
# or (require [foo [*]])
|
|
module, names = entry
|
|
if not isinstance(names, HyList):
|
|
raise HyTypeError(names,
|
|
"(require) name lists should be HyLists")
|
|
__import__(module)
|
|
if '*' in names:
|
|
if len(names) != 1:
|
|
raise HyTypeError(names, "* in a (require) name list "
|
|
"must be on its own")
|
|
require(module, self.module_name, all_macros=True)
|
|
else:
|
|
assignments = {}
|
|
while names:
|
|
if len(names) > 1 and names[1] == HyKeyword("as"):
|
|
k, _, v = names[:3]
|
|
del names[:3]
|
|
assignments[k] = v
|
|
else:
|
|
symbol = names.pop(0)
|
|
assignments[symbol] = symbol
|
|
require(module, self.module_name, assignments=assignments)
|
|
elif (isinstance(entry, HyList) and len(entry) == 3
|
|
and entry[1] == HyKeyword("as")):
|
|
# e.g., (require [foo :as bar])
|
|
module, _, prefix = entry
|
|
__import__(module)
|
|
require(module, self.module_name, all_macros=True,
|
|
prefix=prefix)
|
|
else:
|
|
raise HyTypeError(entry, "unrecognized (require) syntax")
|
|
return Result()
|
|
|
|
@builds("and", "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]
|
|
if len(expression) == 0:
|
|
return asty.Name(operator, id=default, ctx=ast.Load())
|
|
elif len(expression) == 1:
|
|
return self.compile(expression[0])
|
|
ret = Result()
|
|
values = list(map(self.compile, expression))
|
|
if any(value.stmts for value in values):
|
|
# Compile it to an if...else sequence
|
|
var = self.get_anon_var()
|
|
name = asty.Name(operator, id=var, ctx=ast.Store())
|
|
expr_name = asty.Name(operator, id=var, ctx=ast.Load())
|
|
temp_variables = [name, expr_name]
|
|
|
|
def make_assign(value, node=None):
|
|
positioned_name = asty.Name(
|
|
node or operator, id=var, ctx=ast.Store())
|
|
temp_variables.append(positioned_name)
|
|
return asty.Assign(
|
|
node or operator, targets=[positioned_name], value=value)
|
|
|
|
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 = asty.UnaryOp(node, op=ast.Not(), operand=expr_name)
|
|
current.append(asty.If(node, test=cond, body=[], orelse=[]))
|
|
current = current[-1].body
|
|
ret = sum(root, ret)
|
|
ret += Result(expr=expr_name, temp_variables=temp_variables)
|
|
else:
|
|
ret += asty.BoolOp(operator,
|
|
op=opnode(),
|
|
values=[value.force_expr for value in values])
|
|
return ret
|
|
|
|
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}
|
|
ops = {ast_str(k): v for k, v in ops.items()}
|
|
|
|
def _compile_compare_op_expression(self, expression):
|
|
inv = ast_str(expression.pop(0))
|
|
ops = [self.ops[inv]() for _ in range(len(expression) - 1)]
|
|
|
|
e = expression[0]
|
|
exprs, ret, _ = self._compile_collect(expression)
|
|
|
|
return ret + asty.Compare(
|
|
e, left=exprs[0], ops=ops, comparators=exprs[1:])
|
|
|
|
@builds("=", "is", "<", "<=", ">", ">=")
|
|
@checkargs(min=1)
|
|
def compile_compare_op_expression(self, expression):
|
|
if len(expression) == 2:
|
|
return (self.compile(expression[1]) +
|
|
asty.Name(expression, id="True", ctx=ast.Load()))
|
|
return self._compile_compare_op_expression(expression)
|
|
|
|
@builds("!=", "is-not")
|
|
@checkargs(min=2)
|
|
def compile_compare_op_expression_coll(self, expression):
|
|
return self._compile_compare_op_expression(expression)
|
|
|
|
@builds("in", "not-in")
|
|
@checkargs(2)
|
|
def compile_compare_op_expression_binary(self, expression):
|
|
return self._compile_compare_op_expression(expression)
|
|
|
|
def _compile_maths_expression(self, expr):
|
|
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[expr.pop(0)]
|
|
right_associative = op is ast.Pow
|
|
|
|
ret = self.compile(expr.pop(-1 if right_associative else 0))
|
|
for child in expr[:: -1 if right_associative else 1]:
|
|
left_expr = ret.force_expr
|
|
ret += self.compile(child)
|
|
right_expr = ret.force_expr
|
|
if right_associative:
|
|
left_expr, right_expr = right_expr, left_expr
|
|
ret += asty.BinOp(expr, left=left_expr, op=op(), right=right_expr)
|
|
|
|
return ret
|
|
|
|
@builds("**", "//", "<<", ">>", "&")
|
|
@checkargs(min=2)
|
|
def compile_maths_expression_2_or_more(self, expression):
|
|
return self._compile_maths_expression(expression)
|
|
|
|
@builds("%", "^")
|
|
@checkargs(2)
|
|
def compile_maths_expression_exactly_2(self, expression):
|
|
return self._compile_maths_expression(expression)
|
|
|
|
@builds("*", "|")
|
|
def compile_maths_expression_mul(self, expression):
|
|
id_elem = {"*": 1, "|": 0}[expression[0]]
|
|
if len(expression) == 1:
|
|
return asty.Num(expression, n=long_type(id_elem))
|
|
elif len(expression) == 2:
|
|
return self.compile(expression[1])
|
|
else:
|
|
return self._compile_maths_expression(expression)
|
|
|
|
@builds("/")
|
|
@checkargs(min=1)
|
|
def compile_maths_expression_div(self, expression):
|
|
if len(expression) == 2:
|
|
expression = HyExpression([HySymbol("/"),
|
|
HyInteger(1),
|
|
expression[1]]).replace(expression)
|
|
return self._compile_maths_expression(expression)
|
|
|
|
def _compile_maths_expression_additive(self, expression):
|
|
if len(expression) > 2:
|
|
return self._compile_maths_expression(expression)
|
|
else:
|
|
op = {"+": ast.UAdd, "-": ast.USub}[expression.pop(0)]()
|
|
ret = self.compile(expression.pop(0))
|
|
return ret + asty.UnaryOp(
|
|
expression, op=op, operand=ret.force_expr)
|
|
|
|
@builds("&")
|
|
@builds("@", iff=PY35)
|
|
@checkargs(min=1)
|
|
def compile_maths_expression_unary_idempotent(self, expression):
|
|
if len(expression) == 2:
|
|
# Used as a unary operator, this operator simply
|
|
# returns its argument.
|
|
return self.compile(expression[1])
|
|
else:
|
|
return self._compile_maths_expression(expression)
|
|
|
|
@builds("+")
|
|
def compile_maths_expression_add(self, expression):
|
|
if len(expression) == 1:
|
|
# Nullary +
|
|
return asty.Num(expression, n=long_type(0))
|
|
else:
|
|
return self._compile_maths_expression_additive(expression)
|
|
|
|
@builds("-")
|
|
@checkargs(min=1)
|
|
def compile_maths_expression_sub(self, expression):
|
|
return self._compile_maths_expression_additive(expression)
|
|
|
|
@builds("+=", "/=", "//=", "*=", "-=", "%=", "**=", "<<=", ">>=", "|=",
|
|
"^=", "&=")
|
|
@builds("@=", iff=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(expression[1], self.compile(expression[1]))
|
|
ret = self.compile(expression[2])
|
|
|
|
return ret + asty.AugAssign(
|
|
expression, target=target, value=ret.force_expr, op=op())
|
|
|
|
@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)
|
|
if not isinstance(expression, HyExpression):
|
|
# Go through compile again if the type changed.
|
|
return self.compile(expression)
|
|
|
|
if expression == []:
|
|
return self.compile_list(expression, HyList)
|
|
|
|
fn = expression[0]
|
|
func = None
|
|
if isinstance(fn, HyKeyword):
|
|
return self._compile_keyword_call(expression)
|
|
|
|
if isinstance(fn, HySymbol):
|
|
# First check if `fn` is a special form, unless it has an
|
|
# `unpack-iterable` in it, since Python's operators (`+`,
|
|
# etc.) can't unpack. An exception to this exception is that
|
|
# tuple literals (`,`) can unpack.
|
|
if fn == "," or not (
|
|
any(is_unpack("iterable", x) for x in expression[1:])):
|
|
ret = self.compile_atom(fn, expression)
|
|
if ret:
|
|
return ret
|
|
|
|
if fn.startswith("."):
|
|
# (.split "test test") -> "test test".split()
|
|
# (.a.b.c x) -> (.c (. x a b)) -> x.a.b.c()
|
|
|
|
# Get the method name (the last named attribute
|
|
# in the chain of attributes)
|
|
attrs = [HySymbol(a).replace(fn) for a in fn.split(".")[1:]]
|
|
fn = attrs.pop()
|
|
|
|
# Get the object we're calling the method on
|
|
# (extracted with the attribute access DSL)
|
|
i = 1
|
|
if len(expression) != 2:
|
|
# If the expression has only one object,
|
|
# always use that as the callee.
|
|
# Otherwise, hunt for the first thing that
|
|
# isn't a keyword argument or its value.
|
|
while i < len(expression):
|
|
if isinstance(expression[i], HyKeyword):
|
|
# Skip the keyword argument and its value.
|
|
i += 1
|
|
else:
|
|
# Use expression[i].
|
|
break
|
|
i += 1
|
|
else:
|
|
raise HyTypeError(expression,
|
|
"attribute access requires object")
|
|
func = self.compile(HyExpression(
|
|
[HySymbol(".").replace(fn), expression.pop(i)] +
|
|
attrs))
|
|
|
|
# And get the method
|
|
func += asty.Attribute(fn,
|
|
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)
|
|
with_kwargs = fn not in (
|
|
"type", "HyKeyword", "keyword", "name", "keyword?", "identity")
|
|
args, ret, keywords, oldpy_star, oldpy_kw = self._compile_collect(
|
|
expression[1:], with_kwargs, oldpy_unpack=True)
|
|
|
|
return func + ret + asty.Call(
|
|
expression, func=func.expr, args=args, keywords=keywords,
|
|
starargs=oldpy_star, kwargs=oldpy_kw)
|
|
|
|
@builds("setv")
|
|
def compile_def_expression(self, expression):
|
|
root = expression.pop(0)
|
|
if not expression:
|
|
return asty.Name(root, id='None', ctx=ast.Load())
|
|
elif len(expression) == 2:
|
|
return self._compile_assign(expression[0], expression[1])
|
|
elif len(expression) % 2 != 0:
|
|
raise HyTypeError(expression,
|
|
"`{}' needs an even number of arguments".format(
|
|
root))
|
|
else:
|
|
result = Result()
|
|
for tgt, target in zip(expression[::2], expression[1::2]):
|
|
result += self._compile_assign(tgt, target)
|
|
return result
|
|
|
|
def _compile_assign(self, name, result):
|
|
|
|
str_name = "%s" % name
|
|
if str_name in (["None"] + (["True", "False"] if PY3 else [])):
|
|
# Python 2 allows assigning to True and False, although
|
|
# this is rarely wise.
|
|
raise HyTypeError(name,
|
|
"Can't assign to `%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)
|
|
# Throw away .expr to ensure that (setv ...) returns None.
|
|
result.expr = None
|
|
else:
|
|
st_name = self._storeize(name, ld_name)
|
|
result += asty.Assign(
|
|
name if hasattr(name, "start_line") else result,
|
|
targets=[st_name],
|
|
value=result.force_expr)
|
|
|
|
return result
|
|
|
|
@builds("for*")
|
|
@builds("for/a*", iff=PY35)
|
|
@checkargs(min=1)
|
|
def compile_for_expression(self, expression):
|
|
root = expression.pop(0)
|
|
|
|
args = expression.pop(0)
|
|
if not isinstance(args, HyList):
|
|
raise HyTypeError(expression,
|
|
"`{0}` expects a list, received `{1}`".format(
|
|
root, type(args).__name__))
|
|
|
|
try:
|
|
target_name, iterable = args
|
|
except ValueError:
|
|
raise HyTypeError(expression,
|
|
"`for` requires two forms in the list")
|
|
|
|
target = self._storeize(target_name, self.compile(target_name))
|
|
|
|
ret = Result()
|
|
|
|
orel = Result()
|
|
# (for* [] body (else …))
|
|
if ends_with_else(expression):
|
|
else_expr = expression.pop()
|
|
for else_body in else_expr[1:]:
|
|
orel += self.compile(else_body)
|
|
orel += orel.expr_as_stmt()
|
|
|
|
ret += self.compile(iterable)
|
|
|
|
body = self._compile_branch(expression)
|
|
body += body.expr_as_stmt()
|
|
|
|
node = asty.For if root == 'for*' else asty.AsyncFor
|
|
ret += node(expression,
|
|
target=target,
|
|
iter=ret.force_expr,
|
|
body=body.stmts or [asty.Pass(expression)],
|
|
orelse=orel.stmts)
|
|
|
|
ret.contains_yield = body.contains_yield
|
|
|
|
return ret
|
|
|
|
@builds("while")
|
|
@checkargs(min=1)
|
|
def compile_while_expression(self, expr):
|
|
expr.pop(0) # "while"
|
|
cond = expr.pop(0)
|
|
cond_compiled = self.compile(cond)
|
|
|
|
else_expr = None
|
|
if ends_with_else(expr):
|
|
else_expr = expr.pop()
|
|
|
|
if cond_compiled.stmts:
|
|
# We need to ensure the statements for the condition are
|
|
# executed on every iteration. Rewrite the loop to use a
|
|
# single anonymous variable as the condition.
|
|
def e(*x): return HyExpression(x)
|
|
s = HySymbol
|
|
cond_var = s(self.get_anon_var())
|
|
return self.compile(e(
|
|
s('do'),
|
|
e(s('setv'), cond_var, 1),
|
|
e(s('while'), cond_var,
|
|
# Cast the condition to a bool in case it's mutable and
|
|
# changes its truth value, but use (not (not ...)) instead of
|
|
# `bool` in case `bool` has been redefined.
|
|
e(s('setv'), cond_var, e(s('not'), e(s('not'), cond))),
|
|
e(s('if*'), cond_var, e(s('do'), *expr)),
|
|
*([else_expr] if else_expr is not None else []))).replace(expr)) # noqa
|
|
|
|
orel = Result()
|
|
if else_expr is not None:
|
|
for else_body in else_expr[1:]:
|
|
orel += self.compile(else_body)
|
|
orel += orel.expr_as_stmt()
|
|
|
|
body = self._compile_branch(expr)
|
|
body += body.expr_as_stmt()
|
|
|
|
ret = cond_compiled + asty.While(
|
|
expr, test=cond_compiled.force_expr,
|
|
body=body.stmts or [asty.Pass(expr)],
|
|
orelse=orel.stmts)
|
|
ret.contains_yield = body.contains_yield
|
|
|
|
return ret
|
|
|
|
@builds("fn", "fn*")
|
|
@builds("fn/a", iff=PY35)
|
|
# The starred version is for internal use (particularly, in the
|
|
# definition of `defn`). It ensures that a FunctionDef is
|
|
# produced rather than a Lambda.
|
|
@checkargs(min=1)
|
|
def compile_function_def(self, expression):
|
|
root = expression.pop(0)
|
|
force_functiondef = root in ("fn*", "fn/a")
|
|
asyncdef = root == "fn/a"
|
|
|
|
arglist = expression.pop(0)
|
|
docstring = None
|
|
if len(expression) > 1 and isinstance(expression[0], str_type):
|
|
docstring = expression.pop(0)
|
|
|
|
if not isinstance(arglist, HyList):
|
|
raise HyTypeError(expression,
|
|
"First argument to `{}' must be a list".format(root))
|
|
|
|
(ret, args, defaults, stararg,
|
|
kwonlyargs, kwonlydefaults, kwargs) = self._parse_lambda_list(arglist)
|
|
|
|
# Before Python 3.7, docstrings must come at the start, so ensure that
|
|
# happens even if we generate anonymous variables.
|
|
if docstring is not None and not PY37:
|
|
expression.insert(0, docstring)
|
|
docstring = None
|
|
|
|
if PY3:
|
|
# Python 3.4+ requires that args are an ast.arg object, rather
|
|
# than an ast.Name or bare string.
|
|
# FIXME: Set annotations properly.
|
|
# XXX: Beware. Beware. `starargs` and `kwargs` weren't put
|
|
# into the parse lambda list because they're really just an
|
|
# internal parsing thing. Let's find a better home for these guys.
|
|
args, kwonlyargs, [stararg], [kwargs] = (
|
|
[[x and asty.arg(x, arg=ast_str(x), annotation=None)
|
|
for x in o]
|
|
for o in (args, kwonlyargs, [stararg], [kwargs])])
|
|
|
|
else:
|
|
args = [asty.Name(x, id=ast_str(x), ctx=ast.Param())
|
|
for x in args]
|
|
|
|
if PY3:
|
|
kwonlyargs = [asty.Name(x, arg=ast_str(x), ctx=ast.Param())
|
|
for x in kwonlyargs]
|
|
|
|
if kwargs:
|
|
kwargs = ast_str(kwargs)
|
|
|
|
if stararg:
|
|
stararg = ast_str(stararg)
|
|
|
|
args = ast.arguments(
|
|
args=args,
|
|
vararg=stararg,
|
|
kwarg=kwargs,
|
|
kwonlyargs=kwonlyargs,
|
|
kw_defaults=kwonlydefaults,
|
|
defaults=defaults)
|
|
|
|
body = self._compile_branch(expression)
|
|
if not force_functiondef and not body.stmts and docstring is None:
|
|
ret += asty.Lambda(expression, args=args, body=body.force_expr)
|
|
return ret
|
|
|
|
if body.expr:
|
|
if body.contains_yield and not PY3:
|
|
# Prior to PEP 380 (introduced in Python 3.3)
|
|
# generators may not have a value in a return
|
|
# statement.
|
|
body += body.expr_as_stmt()
|
|
else:
|
|
body += asty.Return(body.expr, value=body.expr)
|
|
|
|
if not body.stmts:
|
|
body += asty.Pass(expression)
|
|
|
|
name = self.get_anon_var()
|
|
|
|
node = asty.AsyncFunctionDef if asyncdef else asty.FunctionDef
|
|
ret += node(expression,
|
|
name=name,
|
|
args=args,
|
|
body=body.stmts,
|
|
decorator_list=[],
|
|
docstring=(None if docstring is None else
|
|
str_type(docstring)))
|
|
|
|
ast_name = asty.Name(expression, id=name, ctx=ast.Load())
|
|
|
|
ret += Result(expr=ast_name, temp_variables=[ast_name, ret.stmts[-1]])
|
|
|
|
return ret
|
|
|
|
@builds("return")
|
|
@checkargs(max=1)
|
|
def compile_return(self, expr):
|
|
ret = Result()
|
|
if len(expr) == 1:
|
|
return asty.Return(expr, value=None)
|
|
|
|
ret += self.compile(expr[1])
|
|
return ret + asty.Return(expr, value=ret.force_expr)
|
|
|
|
@builds("defclass")
|
|
@checkargs(min=1)
|
|
def compile_class_expression(self, expressions):
|
|
def rewire_init(expr):
|
|
new_args = []
|
|
if (isinstance(expr, HyExpression)
|
|
and len(expr) > 1
|
|
and isinstance(expr[0], HySymbol)
|
|
and expr[0] == HySymbol("setv")):
|
|
pairs = expr[1:]
|
|
while len(pairs) > 0:
|
|
k, v = (pairs.pop(0), pairs.pop(0))
|
|
if ast_str(k) == "__init__":
|
|
v.append(HySymbol("None"))
|
|
new_args.append(k)
|
|
new_args.append(v)
|
|
expr = HyExpression([
|
|
HySymbol("setv")
|
|
] + new_args).replace(expr)
|
|
|
|
return expr
|
|
|
|
expressions.pop(0) # class
|
|
|
|
class_name = expressions.pop(0)
|
|
if not isinstance(class_name, HySymbol):
|
|
raise HyTypeError(class_name, "Class name must be a symbol.")
|
|
|
|
bases_expr = []
|
|
bases = Result()
|
|
keywords = []
|
|
if expressions:
|
|
base_list = expressions.pop(0)
|
|
if not isinstance(base_list, HyList):
|
|
raise HyTypeError(base_list, "Base classes must be a list.")
|
|
bases_expr, bases, keywords = self._compile_collect(base_list, with_kwargs=PY3)
|
|
|
|
body = Result()
|
|
|
|
# grab the doc string, if there is one
|
|
docstring = None
|
|
if expressions and isinstance(expressions[0], HyString):
|
|
docstring = expressions.pop(0)
|
|
if not PY37:
|
|
body += self.compile(docstring).expr_as_stmt()
|
|
docstring = None
|
|
|
|
if expressions and isinstance(expressions[0], HyList) \
|
|
and not isinstance(expressions[0], HyExpression):
|
|
expr = expressions.pop(0)
|
|
expr = HyExpression([
|
|
HySymbol("setv")
|
|
] + expr).replace(expr)
|
|
body += self.compile(rewire_init(expr))
|
|
|
|
for expression in expressions:
|
|
e = self.compile(rewire_init(macroexpand(expression, self)))
|
|
body += e + e.expr_as_stmt()
|
|
|
|
if not body.stmts:
|
|
body += asty.Pass(expressions)
|
|
|
|
return bases + asty.ClassDef(
|
|
expressions,
|
|
decorator_list=[],
|
|
name=ast_str(class_name),
|
|
keywords=keywords,
|
|
starargs=None,
|
|
kwargs=None,
|
|
bases=bases_expr,
|
|
body=body.stmts,
|
|
docstring=(None if docstring is None else str_type(docstring)))
|
|
|
|
@builds("dispatch-tag-macro")
|
|
@checkargs(exact=2)
|
|
def compile_dispatch_tag_macro(self, expression):
|
|
expression.pop(0) # dispatch-tag-macro
|
|
tag = expression.pop(0)
|
|
if not type(tag) == HyString:
|
|
raise HyTypeError(
|
|
tag,
|
|
"Trying to expand a tag macro using `{0}' instead "
|
|
"of string".format(type(tag).__name__),
|
|
)
|
|
tag = HyString(mangle(tag)).replace(tag)
|
|
expr = tag_macroexpand(tag, expression.pop(0), self)
|
|
return self.compile(expr)
|
|
|
|
@builds("eval-and-compile", "eval-when-compile")
|
|
def compile_eval_and_compile(self, expression, building):
|
|
expression[0] = HySymbol("do")
|
|
hy.importer.hy_eval(expression,
|
|
compile_time_ns(self.module_name),
|
|
self.module_name)
|
|
return (self._compile_branch(expression[1:])
|
|
if building == "eval_and_compile"
|
|
else Result())
|
|
|
|
@builds(HyInteger, HyFloat, HyComplex)
|
|
def compile_numeric_literal(self, x, building):
|
|
f = {HyInteger: long_type,
|
|
HyFloat: float,
|
|
HyComplex: complex}[building]
|
|
# Work around https://github.com/berkerpeksag/astor/issues/85 :
|
|
# astor can't generate Num nodes with NaN, so we have
|
|
# to build an expression that evaluates to NaN.
|
|
def nn(number):
|
|
return asty.Num(x, n=number)
|
|
if isnan(x):
|
|
def nan(): return asty.BinOp(
|
|
x, left=nn(1e900), op=ast.Sub(), right=nn(1e900))
|
|
if f is complex:
|
|
return asty.Call(
|
|
x,
|
|
func=asty.Name(x, id="complex", ctx=ast.Load()),
|
|
keywords=[],
|
|
args=[nan() if isnan(x.real) else nn(x.real),
|
|
nan() if isnan(x.imag) else nn(x.imag)])
|
|
return nan()
|
|
return nn(f(x))
|
|
|
|
@builds(HySymbol)
|
|
def compile_symbol(self, symbol):
|
|
if "." in symbol:
|
|
glob, local = symbol.rsplit(".", 1)
|
|
|
|
if not glob:
|
|
raise HyTypeError(symbol, 'cannot access attribute on '
|
|
'anything other than a name '
|
|
'(in order to get attributes of '
|
|
'expressions, use '
|
|
'`(. <expression> {attr})` or '
|
|
'`(.{attr} <expression>)`)'.format(
|
|
attr=local))
|
|
|
|
if not local:
|
|
raise HyTypeError(symbol, 'cannot access empty attribute')
|
|
|
|
glob = HySymbol(glob).replace(symbol)
|
|
ret = self.compile_symbol(glob)
|
|
|
|
return asty.Attribute(
|
|
symbol,
|
|
value=ret,
|
|
attr=ast_str(local),
|
|
ctx=ast.Load())
|
|
|
|
if ast_str(symbol) in _stdlib:
|
|
self.imports[_stdlib[ast_str(symbol)]].add(ast_str(symbol))
|
|
|
|
return asty.Name(symbol, id=ast_str(symbol), ctx=ast.Load())
|
|
|
|
@builds(HyKeyword)
|
|
def compile_keyword(self, obj):
|
|
ret = Result()
|
|
ret += asty.Call(
|
|
obj,
|
|
func=asty.Name(obj, id="HyKeyword", ctx=ast.Load()),
|
|
args=[asty.Str(obj, s=obj.name)],
|
|
keywords=[])
|
|
ret.add_imports("hy", {"HyKeyword"})
|
|
return ret
|
|
|
|
@builds(HyString, HyBytes)
|
|
def compile_string(self, string, building):
|
|
node = asty.Bytes if PY3 and building is HyBytes else asty.Str
|
|
f = bytes_type if building is HyBytes else str_type
|
|
return node(string, s=f(string))
|
|
|
|
@builds(HyList, HySet)
|
|
def compile_list(self, expression, building):
|
|
elts, ret, _ = self._compile_collect(expression)
|
|
node = {HyList: asty.List, HySet: asty.Set}[building]
|
|
return ret + node(expression, elts=elts, ctx=ast.Load())
|
|
|
|
@builds(HyDict)
|
|
def compile_dict(self, m):
|
|
keyvalues, ret, _ = self._compile_collect(m, dict_display=True)
|
|
return ret + asty.Dict(m, keys=keyvalues[::2], values=keyvalues[1::2])
|
|
|
|
|
|
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.
|
|
"""
|
|
|
|
body = []
|
|
expr = None
|
|
|
|
if not isinstance(tree, HyObject):
|
|
tree = wrap_value(tree)
|
|
if not isinstance(tree, HyObject):
|
|
raise HyCompileError("`tree` must be a HyObject or capable of "
|
|
"being promoted to one")
|
|
spoof_positions(tree)
|
|
|
|
compiler = HyASTCompiler(module_name)
|
|
result = compiler.compile(tree)
|
|
expr = result.force_expr
|
|
|
|
if not get_expr:
|
|
result += result.expr_as_stmt()
|
|
|
|
module_docstring = None
|
|
if (PY37 and result.stmts and
|
|
isinstance(result.stmts[0], ast.Expr) and
|
|
isinstance(result.stmts[0].value, ast.Str)):
|
|
module_docstring = result.stmts.pop(0).value.s
|
|
|
|
body = compiler.imports_as_stmts(tree) + result.stmts
|
|
|
|
ret = root(body=body, docstring=(
|
|
None if module_docstring is None else module_docstring))
|
|
|
|
if get_expr:
|
|
expr = ast.Expression(body=expr)
|
|
ret = (ret, expr)
|
|
|
|
return ret
|