forked from M-Labs/artiq
42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
"""
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:class:`MonomorphismValidator` verifies that all type variables have been
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elided, which is necessary for code generation.
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"""
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from pythonparser import algorithm, diagnostic
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from .. import asttyped, types, builtins
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class MonomorphismValidator(algorithm.Visitor):
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def __init__(self, engine):
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self.engine = engine
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def visit_FunctionDefT(self, node):
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super().generic_visit(node)
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return_type = node.signature_type.find().ret
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if types.is_polymorphic(return_type):
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note = diagnostic.Diagnostic("note",
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"the function has return type {type}",
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{"type": types.TypePrinter().name(return_type)},
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node.name_loc)
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diag = diagnostic.Diagnostic("error",
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"the return type of this function cannot be fully inferred", {},
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node.name_loc, notes=[note])
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self.engine.process(diag)
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visit_QuotedFunctionDefT = visit_FunctionDefT
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def generic_visit(self, node):
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super().generic_visit(node)
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if isinstance(node, asttyped.commontyped):
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if types.is_polymorphic(node.type):
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note = diagnostic.Diagnostic("note",
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"the expression has type {type}",
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{"type": types.TypePrinter().name(node.type)},
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node.loc)
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diag = diagnostic.Diagnostic("error",
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"the type of this expression cannot be fully inferred", {},
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node.loc, notes=[note])
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self.engine.process(diag)
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