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Merge fn and lambda 

We actually only generate an ast.Lambda if (lambda) was called, as a lot of code
expect ast.FunctionDefs (most notably with_decorator).

This allows empty lambdas too.

This fixes #165.
This commit is contained in:
Nicolas Dandrimont 2013-05-07 19:37:14 +02:00
parent 87abda5202
commit 1e24dde153
2 changed files with 28 additions and 42 deletions
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68
hy/compiler.py
View File

@ -841,31 +841,6 @@ class HyASTCompiler(object):
lineno=e.start_line,
col_offset=e.start_column)
@builds("lambda")
@checkargs(2)
def compile_lambda_expression(self, expr):
expr.pop(0)
sig = expr.pop(0)
body = self.compile(expr.pop(0))
body += ast.Lambda(
lineno=expr.start_line,
col_offset=expr.start_column,
args=ast.arguments(args=[
ast.Name(arg=ast_str(x), id=ast_str(x),
ctx=ast.Param(),
lineno=x.start_line,
col_offset=x.start_column)
for x in sig],
vararg=None,
kwarg=None,
defaults=[],
kwonlyargs=[],
kw_defaults=[]),
body=body.force_expr)
return body
@builds("yield")
@checkargs(max=1)
def compile_yield_expression(self, expr):
@ -1406,16 +1381,37 @@ class HyASTCompiler(object):
col_offset=expression.start_column)
return ret
@builds("lambda")
@builds("fn")
@checkargs(min=1)
def compile_function_def(self, expression):
expression.pop(0)
name = self.get_anon_fn()
called_as = expression.pop(0)
arglist = expression.pop(0)
ret, args, defaults, stararg, kwargs = self._parse_lambda_list(arglist)
args = ast.arguments(
args=[ast.Name(arg=ast_str(x), id=ast_str(x),
ctx=ast.Param(),
lineno=x.start_line,
col_offset=x.start_column)
for x in args],
vararg=stararg,
kwarg=kwargs,
kwonlyargs=[],
kw_defaults=[],
defaults=defaults)
body = self._compile_branch(expression)
if not body.stmts and called_as == "lambda":
ret += ast.Lambda(
lineno=expression.start_line,
col_offset=expression.start_column,
args=args,
body=body.force_expr)
return ret
if body.expr:
body += ast.Return(value=body.expr,
lineno=body.expr.lineno,
@ -1425,22 +1421,12 @@ class HyASTCompiler(object):
body += ast.Pass(lineno=expression.start_line,
col_offset=expression.start_column)
name = self.get_anon_fn()
ret += ast.FunctionDef(name=name,
lineno=expression.start_line,
col_offset=expression.start_column,
args=ast.arguments(
args=[
ast.Name(
arg=ast_str(x), id=ast_str(x),
ctx=ast.Param(),
lineno=x.start_line,
col_offset=x.start_column)
for x in args],
vararg=stararg,
kwarg=kwargs,
kwonlyargs=[],
kw_defaults=[],
defaults=defaults),
args=args,
body=body.stmts,
decorator_list=[])

2
tests/compilers/test_ast.py
View File

@ -199,13 +199,13 @@ def test_ast_bad_global():
def test_ast_good_lambda():
"Make sure AST can compile valid lambda"
hy_compile(tokenize("(lambda [])"))
hy_compile(tokenize("(lambda [] 1)"))
def test_ast_bad_lambda():
"Make sure AST can't compile invalid lambda"
cant_compile("(lambda)")
cant_compile("(lambda [])")
def test_ast_good_yield():