def veval_ast_unary_op(astc: 'AstContext', local_field: 'values.Field',
graph: 'graphs.Graph'):
"""
eval unary operation.
Ex. -xx
"""
assert (isinstance(astc.nast, gast.gast.UnaryOp))
lineprop = utils.LineProperty(astc.lineno)
unaryop = nodes.UnaryOpType.Unknown
if isinstance(astc.nast.op, gast.UAdd):
unaryop = nodes.UnaryOpType.UAdd
if isinstance(astc.nast.op, gast.USub):
unaryop = nodes.UnaryOpType.USub
if isinstance(astc.nast.op, gast.Not):
unaryop = nodes.UnaryOpType.Not
operand = veval_ast(astc.c(astc.nast.operand), local_field, graph)
operand_value = try_get_value(operand, 'unary', lineprop)
node = nodes.NodeUnaryOp(operand_value, unaryop)
ret_value = veval_unary.veval(unaryop, operand_value)
node.set_outputs([ret_value])
graph.add_node(node)
return values.ValueRef(ret_value)
def veval_ast_unary_op(astc : 'AstContext', local_field : 'values.Field', graph : 'graphs.Graph'):
"""
eval unary operation.
Ex. -xx
"""
assert(isinstance(astc.nast, gast.gast.UnaryOp))
unaryop = nodes.UnaryOpType.Unknown
if isinstance(astc.nast.op, gast.UAdd):
unaryop = nodes.UnaryOpType.UAdd
if isinstance(astc.nast.op, gast.USub):
unaryop = nodes.UnaryOpType.USub
if isinstance(astc.nast.op, gast.Not):
unaryop = nodes.UnaryOpType.Not
operand = veval_ast(astc.c(astc.nast.operand), local_field, graph)
node = nodes.NodeUnaryOp(operand.get_value(), unaryop)
ret_value = veval_unary.veval(unaryop, operand.get_value())
node.set_outputs([ret_value])
graph.add_node(node)
return ret_value