No expression of emotion, micro or macro, reveals exactly what is triggering it.
毕竟表情是不会暴露其真正诱因的,甭管是微观表情还是宏观表情。
Otherwise, if the expression is not a constant, another macro function is called to round up the value to a power of two.
如果表达式不是常量,就调用另一个宏函数把值向上取整到2的幂。
Together with the macro YYLLOC_DEFAULT (see the Bison documentation for the default definition), Bison calculates the location of an expression.
使用宏 YYLLOC_DEFAULT(请参看 Bison 文档 中默认的定义),Bison 可以计算出某个表达式的位置。
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