parser.py 文件源码

def p_booleqExpr_impl(self,p):
        '''booleqExpr : relationExpr BOOLEQ relationExpr
                      | relationExpr NEQ    relationExpr
        '''
        if p[2] == "NEQ":
            boolOp = sympy.Ne
        else:
            boolOp = sympy.Eq
        self.checkExactUnits(p[1].astUnit,p[3].astUnit)
        p[0] = AST(boolOp(p[1].sympy,p[3].sympy),self.boolean())