src/mem/slicc/ast/EnumExprAST.py

# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
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from slicc.ast.ExprAST import ExprAST

class EnumExprAST(ExprAST):
    def __init__(self, slicc, type_ast, value):
        super().__init__(slicc)

        assert type_ast
        assert value

        self.type_ast = type_ast
        self.value = value

    def __repr__(self):
        return "[EnumExpr: %s:%s]" % (self.type_ast, self.value)

    def generate(self, code, **kwargs):
        fix = code.nofix()
        code('${{self.type_ast.type.c_ident}}_${{self.value}}')
        code.fix(fix)

        # Make sure the enumeration value exists
        if self.value not in self.type_ast.type.enums:
            self.error("Type '%s' does not have enumeration '%s'",
                       self.type_ast, self.value)

        return self.type_ast.type