86fda31ab1
Functions and variables relating to compilation and parsing have been moved to `compiler.py` and `lex/__init__.py`, respectively. Those functions are - `hy_parse` from `hy.importer` to `hy.lex` - `hy_eval`, `ast_compile`, and `calling_module` from `hy.importer` to `hy.compiler` Closes hylang/hy#1695.
690 lines
20 KiB
Python
690 lines
20 KiB
Python
# -*- 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 __future__ import unicode_literals
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from hy import HyString
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from hy.models import HyObject
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from hy.compiler import hy_compile, hy_eval
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from hy.errors import HyCompileError, HyTypeError
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from hy.lex import hy_parse
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from hy.lex.exceptions import LexException
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from hy._compat import PY3
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import ast
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import pytest
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def _ast_spotcheck(arg, root, secondary):
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if "." in arg:
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local, full = arg.split(".", 1)
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return _ast_spotcheck(full,
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getattr(root, local),
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getattr(secondary, local))
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assert getattr(root, arg) == getattr(secondary, arg)
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def can_compile(expr):
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return hy_compile(hy_parse(expr), "__main__")
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def can_eval(expr):
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return hy_eval(hy_parse(expr))
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def cant_compile(expr):
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try:
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hy_compile(hy_parse(expr), "__main__")
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assert False
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except HyTypeError as e:
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# Anything that can't be compiled should raise a user friendly
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# error, otherwise it's a compiler bug.
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assert isinstance(e.expression, HyObject)
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assert e.message
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return e
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except HyCompileError as e:
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# Anything that can't be compiled should raise a user friendly
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# error, otherwise it's a compiler bug.
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assert isinstance(e.exception, HyTypeError)
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assert e.traceback
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return e
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def s(x):
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return can_compile('"module docstring" ' + x).body[-1].value.s
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def test_ast_bad_type():
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"Make sure AST breakage can happen"
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class C:
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pass
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try:
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hy_compile(C(), "__main__")
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assert True is False
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except TypeError:
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pass
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def test_empty_expr():
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"Empty expressions should be illegal at the top level."
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cant_compile("(print ())")
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can_compile("(print '())")
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def test_dot_unpacking():
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can_compile("(.meth obj #* args az)")
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cant_compile("(.meth #* args az)")
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cant_compile("(. foo #* bar baz)")
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can_compile("(.meth obj #** args az)")
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can_compile("(.meth #** args obj)")
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cant_compile("(. foo #** bar baz)")
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def test_ast_bad_if():
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"Make sure AST can't compile invalid if*"
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cant_compile("(if*)")
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cant_compile("(if* foobar)")
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cant_compile("(if* 1 2 3 4 5)")
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def test_ast_valid_if():
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"Make sure AST can compile valid if*"
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can_compile("(if* foo bar)")
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def test_ast_valid_unary_op():
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"Make sure AST can compile valid unary operator"
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can_compile("(not 2)")
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can_compile("(~ 1)")
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def test_ast_invalid_unary_op():
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"Make sure AST can't compile invalid unary operator"
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cant_compile("(not 2 3 4)")
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cant_compile("(not)")
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cant_compile("(not 2 3 4)")
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cant_compile("(~ 2 2 3 4)")
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cant_compile("(~)")
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def test_ast_bad_while():
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"Make sure AST can't compile invalid while"
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cant_compile("(while)")
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def test_ast_good_do():
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"Make sure AST can compile valid do"
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can_compile("(do)")
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can_compile("(do 1)")
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def test_ast_good_raise():
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"Make sure AST can compile valid raise"
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can_compile("(raise)")
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can_compile("(raise Exception)")
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can_compile("(raise e)")
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if PY3:
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def test_ast_raise_from():
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can_compile("(raise Exception :from NameError)")
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def test_ast_bad_raise():
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"Make sure AST can't compile invalid raise"
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cant_compile("(raise Exception Exception)")
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def test_ast_good_try():
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"Make sure AST can compile valid try"
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can_compile("(try 1 (except []) (else 1))")
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can_compile("(try 1 (finally 1))")
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can_compile("(try 1 (except []) (finally 1))")
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can_compile("(try 1 (except [x]) (except [y]) (finally 1))")
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can_compile("(try 1 (except []) (else 1) (finally 1))")
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can_compile("(try 1 (except [x]) (except [y]) (else 1) (finally 1))")
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def test_ast_bad_try():
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"Make sure AST can't compile invalid try"
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cant_compile("(try)")
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cant_compile("(try 1)")
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cant_compile("(try 1 bla)")
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cant_compile("(try 1 bla bla)")
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cant_compile("(try (do bla bla))")
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cant_compile("(try (do) (else 1) (else 2))")
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cant_compile("(try 1 (else 1))")
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cant_compile("(try 1 (else 1) (except []))")
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cant_compile("(try 1 (finally 1) (except []))")
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cant_compile("(try 1 (except []) (finally 1) (else 1))")
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def test_ast_good_except():
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"Make sure AST can compile valid except"
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can_compile("(try 1 (except []))")
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can_compile("(try 1 (except [Foobar]))")
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can_compile("(try 1 (except [[]]))")
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can_compile("(try 1 (except [x FooBar]))")
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can_compile("(try 1 (except [x [FooBar BarFoo]]))")
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can_compile("(try 1 (except [x [FooBar BarFoo]]))")
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def test_ast_bad_except():
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"Make sure AST can't compile invalid except"
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cant_compile("(except 1)")
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cant_compile("(try 1 (except))")
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cant_compile("(try 1 (except 1))")
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cant_compile("(try 1 (except [1 3]))")
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cant_compile("(try 1 (except [(f) [IOError ValueError]]))")
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cant_compile("(try 1 (except [x [FooBar] BarBar]))")
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def test_ast_good_assert():
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"""Make sure AST can compile valid asserts. Asserts may or may not
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include a label."""
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can_compile("(assert 1)")
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can_compile("(assert 1 \"Assert label\")")
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can_compile("(assert 1 (+ \"spam \" \"eggs\"))")
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can_compile("(assert 1 12345)")
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can_compile("(assert 1 None)")
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can_compile("(assert 1 (+ 2 \"incoming eggsception\"))")
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def test_ast_bad_assert():
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"Make sure AST can't compile invalid assert"
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cant_compile("(assert)")
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cant_compile("(assert 1 2 3)")
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cant_compile("(assert 1 [1 2] 3)")
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def test_ast_good_global():
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"Make sure AST can compile valid global"
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can_compile("(global a)")
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can_compile("(global foo bar)")
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def test_ast_bad_global():
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"Make sure AST can't compile invalid global"
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cant_compile("(global)")
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cant_compile("(global (foo))")
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if PY3:
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def test_ast_good_nonlocal():
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"Make sure AST can compile valid nonlocal"
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can_compile("(nonlocal a)")
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can_compile("(nonlocal foo bar)")
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def test_ast_bad_nonlocal():
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"Make sure AST can't compile invalid nonlocal"
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cant_compile("(nonlocal)")
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cant_compile("(nonlocal (foo))")
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def test_ast_good_defclass():
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"Make sure AST can compile valid defclass"
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can_compile("(defclass a)")
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can_compile("(defclass a [])")
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can_compile("(defclass a [] None 42)")
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can_compile("(defclass a [] None \"test\")")
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can_compile("(defclass a [] None (print \"foo\"))")
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@pytest.mark.skipif(not PY3, reason="Python 3 supports class keywords")
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def test_ast_good_defclass_with_metaclass():
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"Make sure AST can compile valid defclass with keywords"
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can_compile("(defclass a [:metaclass b])")
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can_compile("(defclass a [:b c])")
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def test_ast_bad_defclass():
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"Make sure AST can't compile invalid defclass"
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cant_compile("(defclass)")
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cant_compile("(defclass a None)")
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cant_compile("(defclass a None None)")
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def test_ast_good_lambda():
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"Make sure AST can compile valid lambda"
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can_compile("(fn [])")
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can_compile("(fn [] 1)")
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def test_ast_bad_lambda():
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"Make sure AST can't compile invalid lambda"
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cant_compile("(fn)")
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cant_compile("(fn ())")
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cant_compile("(fn () 1)")
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cant_compile("(fn (x) 1)")
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cant_compile('(fn "foo")')
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def test_ast_good_yield():
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"Make sure AST can compile valid yield"
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can_compile("(yield 1)")
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def test_ast_bad_yield():
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"Make sure AST can't compile invalid yield"
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cant_compile("(yield 1 2)")
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def test_ast_import_mangle_dotted():
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"""Mangling a module name with a period shouldn't create a spurious
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`asname`."""
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code = can_compile("(import a-b.c)")
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assert code.body[0].names[0].name == "a_b.c"
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assert code.body[0].names[0].asname is None
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def test_ast_good_import_from():
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"Make sure AST can compile valid selective import"
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can_compile("(import [x [y]])")
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def test_ast_require():
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"Make sure AST respects (require) syntax"
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can_compile("(require tests.resources.tlib)")
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can_compile("(require [tests.resources.tlib [qplah parald]])")
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can_compile("(require [tests.resources.tlib [*]])")
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can_compile("(require [tests.resources.tlib :as foobar])")
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can_compile("(require [tests.resources.tlib [qplah :as quiz]])")
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can_compile("(require [tests.resources.tlib [qplah :as quiz parald]])")
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cant_compile("(require [tests.resources.tlib])")
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cant_compile("(require [tests.resources.tlib [* qplah]])")
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cant_compile("(require [tests.resources.tlib [qplah *]])")
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cant_compile("(require [tests.resources.tlib [* *]])")
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def test_ast_import_require_dotted():
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"""As in Python, it should be a compile-time error to attempt to
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import a dotted name."""
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cant_compile("(import [spam [foo.bar]])")
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cant_compile("(require [spam [foo.bar]])")
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def test_ast_no_pointless_imports():
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def contains_import_from(code):
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return any([isinstance(node, ast.ImportFrom)
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for node in can_compile(code).body])
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# `reduce` is a builtin in Python 2, but not Python 3.
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# The version of `map` that returns an iterator is a builtin in
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# Python 3, but not Python 2.
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if PY3:
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assert contains_import_from("reduce")
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assert not contains_import_from("map")
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else:
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assert not contains_import_from("reduce")
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assert contains_import_from("map")
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def test_ast_good_get():
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"Make sure AST can compile valid get"
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can_compile("(get x y)")
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def test_ast_bad_get():
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"Make sure AST can't compile invalid get"
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cant_compile("(get)")
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cant_compile("(get 1)")
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def test_ast_good_cut():
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"Make sure AST can compile valid cut"
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can_compile("(cut x)")
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can_compile("(cut x y)")
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can_compile("(cut x y z)")
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can_compile("(cut x y z t)")
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def test_ast_bad_cut():
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"Make sure AST can't compile invalid cut"
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cant_compile("(cut)")
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cant_compile("(cut 1 2 3 4 5)")
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def test_ast_good_take():
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"Make sure AST can compile valid 'take'"
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can_compile("(take 1 [2 3])")
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def test_ast_good_drop():
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"Make sure AST can compile valid 'drop'"
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can_compile("(drop 1 [2 3])")
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def test_ast_good_assoc():
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"Make sure AST can compile valid assoc"
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can_compile("(assoc x y z)")
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def test_ast_bad_assoc():
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"Make sure AST can't compile invalid assoc"
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cant_compile("(assoc)")
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cant_compile("(assoc 1)")
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cant_compile("(assoc 1 2)")
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cant_compile("(assoc 1 2 3 4)")
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def test_ast_bad_with():
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"Make sure AST can't compile invalid with"
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cant_compile("(with*)")
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cant_compile("(with* [])")
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cant_compile("(with* [] (pass))")
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def test_ast_valid_while():
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"Make sure AST can't compile invalid while"
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can_compile("(while foo bar)")
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can_compile("(while foo bar (else baz))")
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def test_ast_valid_for():
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"Make sure AST can compile valid for"
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can_compile("(for [a 2] (print a))")
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def test_nullary_break_continue():
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can_compile("(while 1 (break))")
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cant_compile("(while 1 (break 1))")
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can_compile("(while 1 (continue))")
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cant_compile("(while 1 (continue 1))")
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def test_ast_expression_basics():
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""" Ensure basic AST expression conversion works. """
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code = can_compile("(foo bar)").body[0]
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tree = ast.Expr(value=ast.Call(
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func=ast.Name(
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id="foo",
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ctx=ast.Load(),
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),
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args=[
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ast.Name(id="bar", ctx=ast.Load())
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],
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keywords=[],
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starargs=None,
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kwargs=None,
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))
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_ast_spotcheck("value.func.id", code, tree)
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def test_ast_anon_fns_basics():
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""" Ensure anon fns work. """
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code = can_compile("(fn [x] (* x x))").body[0].value
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assert type(code) == ast.Lambda
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code = can_compile("(fn [x] (print \"multiform\") (* x x))").body[0]
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assert type(code) == ast.FunctionDef
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can_compile("(fn [x])")
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cant_compile("(fn)")
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def test_ast_non_decoratable():
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""" Ensure decorating garbage breaks """
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cant_compile("(with-decorator (foo) (* x x))")
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def test_ast_lambda_lists():
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"""Ensure the compiler chokes on invalid lambda-lists"""
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cant_compile('(fn [&optional [a b c]] a)')
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cant_compile('(fn [&optional [1 2]] (list 1 2))')
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def test_ast_print():
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code = can_compile("(print \"foo\")").body[0]
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assert type(code.value) == ast.Call
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def test_ast_tuple():
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""" Ensure tuples work. """
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code = can_compile("(, 1 2 3)").body[0].value
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assert type(code) == ast.Tuple
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def test_lambda_list_keywords_rest():
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""" Ensure we can compile functions with lambda list keywords."""
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can_compile("(fn [x &rest xs] (print xs))")
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cant_compile("(fn [x &rest xs &rest ys] (print xs))")
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can_compile("(fn [&optional a &rest xs] (print xs))")
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def test_lambda_list_keywords_kwargs():
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""" Ensure we can compile functions with &kwargs."""
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can_compile("(fn [x &kwargs kw] (list x kw))")
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cant_compile("(fn [x &kwargs xs &kwargs ys] (list x xs ys))")
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can_compile("(fn [&optional x &kwargs kw] (list x kw))")
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def test_lambda_list_keywords_kwonly():
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"""Ensure we can compile functions with &kwonly if we're on Python
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3, or fail with an informative message on Python 2."""
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kwonly_demo = "(fn [&kwonly a [b 2]] (print 1) (print a b))"
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if PY3:
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code = can_compile(kwonly_demo)
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for i, kwonlyarg_name in enumerate(('a', 'b')):
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assert kwonlyarg_name == code.body[0].args.kwonlyargs[i].arg
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assert code.body[0].args.kw_defaults[0] is None
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assert code.body[0].args.kw_defaults[1].n == 2
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else:
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exception = cant_compile(kwonly_demo)
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assert isinstance(exception, HyTypeError)
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message, = exception.args
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assert message == "&kwonly parameters require Python 3"
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def test_lambda_list_keywords_mixed():
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""" Ensure we can mix them up."""
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can_compile("(fn [x &rest xs &kwargs kw] (list x xs kw))")
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cant_compile("(fn [x &rest xs &fasfkey {bar \"baz\"}])")
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if PY3:
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can_compile("(fn [x &rest xs &kwonly kwoxs &kwargs kwxs]"
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" (list x xs kwxs kwoxs))")
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def test_missing_keyword_argument_value():
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"""Ensure the compiler chokes on missing keyword argument values."""
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with pytest.raises(HyTypeError) as excinfo:
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can_compile("((fn [x] x) :x)")
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assert excinfo.value.message == "Keyword argument :x needs a value."
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def test_ast_unicode_strings():
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"""Ensure we handle unicode strings correctly"""
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def _compile_string(s):
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hy_s = HyString(s)
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code = hy_compile([hy_s], "__main__")
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# We put hy_s in a list so it isn't interpreted as a docstring.
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# code == ast.Module(body=[ast.Expr(value=ast.List(elts=[ast.Str(s=xxx)]))])
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return code.body[0].value.elts[0].s
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assert _compile_string("test") == "test"
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assert _compile_string("\u03b1\u03b2") == "\u03b1\u03b2"
|
|
assert _compile_string("\xc3\xa9") == "\xc3\xa9"
|
|
|
|
|
|
def test_ast_unicode_vs_bytes():
|
|
assert s('"hello"') == u"hello"
|
|
assert type(s('"hello"')) is (str if PY3 else unicode) # noqa
|
|
assert s('b"hello"') == (eval('b"hello"') if PY3 else "hello")
|
|
assert type(s('b"hello"')) is (bytes if PY3 else str)
|
|
assert s('b"\\xa0"') == (bytes([160]) if PY3 else chr(160))
|
|
|
|
|
|
def test_ast_bracket_string():
|
|
assert s(r'#[[empty delims]]') == 'empty delims'
|
|
assert s(r'#[my delim[fizzle]my delim]') == 'fizzle'
|
|
assert s(r'#[[]]') == ''
|
|
assert s(r'#[my delim[]my delim]') == ''
|
|
assert type(s('#[X[hello]X]')) is (str if PY3 else unicode) # noqa
|
|
assert s(r'#[X[raw\nstring]X]') == 'raw\\nstring'
|
|
assert s(r'#[foozle[aa foozli bb ]foozle]') == 'aa foozli bb '
|
|
assert s(r'#[([unbalanced](]') == 'unbalanced'
|
|
assert s(r'#[(1💯@)} {a} {a!]') == 'hello world'
|
|
assert (s(r'''#[X[
|
|
Remove the leading newline, please.
|
|
]X]''') == 'Remove the leading newline, please.\n')
|
|
assert (s(r'''#[X[
|
|
|
|
|
|
Only one leading newline should be removed.
|
|
]X]''') == '\n\nOnly one leading newline should be removed.\n')
|
|
|
|
|
|
def test_compile_error():
|
|
"""Ensure we get compile error in tricky cases"""
|
|
with pytest.raises(HyTypeError) as excinfo:
|
|
can_compile("(fn [] (in [1 2 3]))")
|
|
|
|
|
|
def test_for_compile_error():
|
|
"""Ensure we get compile error in tricky 'for' cases"""
|
|
with pytest.raises(LexException) as excinfo:
|
|
can_compile("(fn [] (for)")
|
|
assert excinfo.value.message == "Premature end of input"
|
|
|
|
with pytest.raises(LexException) as excinfo:
|
|
can_compile("(fn [] (for)))")
|
|
assert excinfo.value.message == "Ran into a RPAREN where it wasn't expected."
|
|
|
|
cant_compile("(fn [] (for [x] x))")
|
|
|
|
|
|
def test_attribute_access():
|
|
"""Ensure attribute access compiles correctly"""
|
|
can_compile("(. foo bar baz)")
|
|
can_compile("(. foo [bar] baz)")
|
|
can_compile("(. foo bar [baz] [0] quux [frob])")
|
|
can_compile("(. foo bar [(+ 1 2 3 4)] quux [frob])")
|
|
cant_compile("(. foo bar :baz [0] quux [frob])")
|
|
cant_compile("(. foo bar baz (0) quux [frob])")
|
|
cant_compile("(. foo bar baz [0] quux {frob})")
|
|
|
|
|
|
def test_attribute_empty():
|
|
"""Ensure using dot notation with a non-expression is an error"""
|
|
cant_compile(".")
|
|
cant_compile("foo.")
|
|
cant_compile(".foo")
|
|
cant_compile('"bar".foo')
|
|
cant_compile('[2].foo')
|
|
|
|
|
|
def test_bad_setv():
|
|
"""Ensure setv handles error cases"""
|
|
cant_compile("(setv (a b) [1 2])")
|
|
|
|
|
|
def test_defn():
|
|
"""Ensure that defn works correctly in various corner cases"""
|
|
cant_compile("(defn \"hy\" [] 1)")
|
|
cant_compile("(defn :hy [] 1)")
|
|
can_compile("(defn &hy [] 1)")
|
|
cant_compile('(defn hy "foo")')
|
|
|
|
|
|
def test_setv_builtins():
|
|
"""Ensure that assigning to a builtin fails, unless in a class"""
|
|
cant_compile("(setv None 42)")
|
|
can_compile("(defclass A [] (defn get [self] 42))")
|
|
can_compile("""
|
|
(defclass A []
|
|
(defn get [self] 42)
|
|
(defclass B []
|
|
(defn get [self] 42))
|
|
(defn if* [self] 0))
|
|
""")
|
|
|
|
|
|
def test_top_level_unquote():
|
|
with pytest.raises(HyTypeError) as excinfo:
|
|
can_compile("(unquote)")
|
|
assert excinfo.value.message == "The special form 'unquote' is not allowed here"
|
|
|
|
with pytest.raises(HyTypeError) as excinfo:
|
|
can_compile("(unquote-splice)")
|
|
assert excinfo.value.message == "The special form 'unquote-splice' is not allowed here"
|
|
|
|
|
|
def test_lots_of_comment_lines():
|
|
# https://github.com/hylang/hy/issues/1313
|
|
can_compile(1000 * ";\n")
|
|
|
|
|
|
def test_exec_star():
|
|
|
|
code = can_compile('(exec* "print(5)")').body[0]
|
|
assert type(code) == (ast.Expr if PY3 else ast.Exec)
|
|
if not PY3:
|
|
assert code.body.s == "print(5)"
|
|
assert code.globals is None
|
|
assert code.locals is None
|
|
|
|
code = can_compile('(exec* "print(a)" {"a" 3})').body[0]
|
|
assert type(code) == (ast.Expr if PY3 else ast.Exec)
|
|
if not PY3:
|
|
assert code.body.s == "print(a)"
|
|
assert code.globals.keys[0].s == "a"
|
|
assert code.locals is None
|
|
|
|
code = can_compile('(exec* "print(a + b)" {"a" "x"} {"b" "y"})').body[0]
|
|
assert type(code) == (ast.Expr if PY3 else ast.Exec)
|
|
if not PY3:
|
|
assert code.body.s == "print(a + b)"
|
|
assert code.globals.keys[0].s == "a"
|
|
assert code.locals.keys[0].s == "b"
|
|
|
|
|
|
def test_compiler_macro_tag_try():
|
|
"""Check that try forms within defmacro/deftag are compiled correctly"""
|
|
# https://github.com/hylang/hy/issues/1350
|
|
can_compile("(defmacro foo [] (try None (except [] None)) `())")
|
|
can_compile("(deftag foo [] (try None (except [] None)) `())")
|
|
|
|
|
|
@pytest.mark.skipif(not PY3, reason="Python 3 required")
|
|
def test_ast_good_yield_from():
|
|
"Make sure AST can compile valid yield-from"
|
|
can_compile("(yield-from [1 2])")
|
|
|
|
|
|
@pytest.mark.skipif(not PY3, reason="Python 3 required")
|
|
def test_ast_bad_yield_from():
|
|
"Make sure AST can't compile invalid yield-from"
|
|
cant_compile("(yield-from)")
|
|
|
|
|
|
def test_eval_generator_with_return():
|
|
"""Ensure generators with a return statement works."""
|
|
can_eval("(fn [] (yield 1) (yield 2) (return))")
|
|
|
|
|
|
def test_futures_imports():
|
|
"""Make sure __future__ imports go first, especially when builtins are
|
|
automatically added (e.g. via use of a builtin name like `name`)."""
|
|
hy_ast = can_compile((
|
|
'(import [__future__ [print_function]])\n'
|
|
'(import sys)\n'
|
|
'(setv name [1 2])'
|
|
'(print (first name))'))
|
|
|
|
assert hy_ast.body[0].module == '__future__'
|
|
assert hy_ast.body[1].module == 'hy.core.language'
|
|
|
|
hy_ast = can_compile((
|
|
'(import sys)\n'
|
|
'(import [__future__ [print_function]])\n'
|
|
'(setv name [1 2])'
|
|
'(print (first name))'))
|
|
|
|
assert hy_ast.body[0].module == '__future__'
|
|
assert hy_ast.body[1].module == 'hy.core.language'
|