forked from M-Labs/artiq
transforms/fold_constants: support BoolOp
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@ -29,6 +29,12 @@ _ast_binops = {
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}
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_ast_boolops = {
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ast.Or: lambda x, y: x or y,
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ast.And: lambda x, y: x and y
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}
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class _ConstantFolder(ast.NodeTransformer):
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def visit_UnaryOp(self, node):
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self.generic_visit(node)
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@ -62,13 +68,35 @@ class _ConstantFolder(ast.NodeTransformer):
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return node
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return ast.copy_location(result, node)
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def visit_BoolOp(self, node):
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self.generic_visit(node)
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new_values = []
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for value in node.values:
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try:
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value_c = eval_constant(value)
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except NotConstant:
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new_values.append(value)
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else:
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if new_values and not isinstance(new_values[-1], ast.AST):
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op = _ast_boolops[type(node.op)]
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new_values[-1] = op(new_values[-1], value_c)
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else:
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new_values.append(value_c)
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new_values = [v if isinstance(v, ast.AST) else value_to_ast(v)
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for v in new_values]
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if len(new_values) > 1:
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node.values = new_values
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return node
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else:
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return new_values[0]
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def visit_Call(self, node):
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self.generic_visit(node)
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fn = node.func.id
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constant_ops = {
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"int": int,
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"int64": int64,
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"round": round,
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"int": int,
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"int64": int64,
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"round": round,
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"round64": round64
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}
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if fn in constant_ops:
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