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transforms.inferencer: accept round(width=n) form (#198).

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This commit is contained in:
whitequark 2015-12-20 01:02:57 +08:00
parent 1638f0fa9b
commit 95af6daa28
2 changed files with 17 additions and 0 deletions
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14
artiq/compiler/transforms/inferencer.py
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@ -708,6 +708,7 @@ class Inferencer(algorithm.Visitor):
elif types.is_builtin(typ, "round"):
valid_forms = lambda: [
valid_form("round(x:float) -> int(width='a)"),
valid_form("round(x:float, width='b:<int literal>) -> int(width='b)")
]
self._unify(node.type, builtins.TInt(),
@ -718,6 +719,19 @@ class Inferencer(algorithm.Visitor):
self._unify(arg.type, builtins.TFloat(),
arg.loc, None)
elif len(node.args) == 1 and len(node.keywords) == 1 and \
builtins.is_numeric(node.args[0].type) and \
node.keywords[0].arg == 'width':
width = node.keywords[0].value
if not (isinstance(width, asttyped.NumT) and isinstance(width.n, int)):
diag = diagnostic.Diagnostic("error",
"the width argument of round() must be an integer literal", {},
node.keywords[0].loc)
self.engine.process(diag)
return
self._unify(node.type, builtins.TInt(types.TValue(width.n)),
node.loc, None)
else:
diagnose(valid_forms())
elif types.is_builtin(typ, "print"):

3
lit-test/test/inferencer/builtin_calls.py
View File

@ -30,3 +30,6 @@ len([])
# CHECK-L: round:<function round>(1.0:float):int(width='h)
round(1.0)
# CHECK-L: round:<function round>(1.0:float, width=64:int(width='i)):int(width=64)
round(1.0, width=64)