def p_if_else_statement(self, p):
"""
if_statement : IF LBRACKET relation RBRACKET body ELSE body
"""
p[0] = ast.If(p[3], p[5], p[7])
def p_if_statement(self, p):
"""
if_statement : IF LBRACKET relation RBRACKET body %prec IF
"""
p[0] = ast.If(p[3], p[5])