def p_express_rel_4(p):
"""
express_rel : NEG express_rel
"""
p[0] = Expression(p[1], p[2], None)
def p_express_rel_3(p):
"""
express_rel : NEG LPAR expression RPAR
"""
p[0] = Expression(p[1], p[3], None)
def p_expression_0(p):
"""
expression : express_rel LOGOP expression
"""
p[0] = Expression(p[2], p[1], p[3])
def p_express_rel_0(p):
"""
express_rel : express_arg RELOP express_rel
"""
p[0] = Expression(p[2], p[1], p[3])
def p_desc_var_3(p):
"""
desc_var : unary_func LPAR desc_var RPAR
"""
p[0] = Expression(p[1], p[3], None)