从
standard开始,我试图了解表达式最终会是哪种类型：
bool myBool;
[...]
uint8_t(255) * (myBool);
我保证myBool会被转换为uint8_t(a.k.a.unsigned char),或者整个结果可能是int吗？
有用链接：bool to int conversion
从您链接到的文档：
5 Expressions
9 Many binary operators that expect operands of arithmetic or enumera-
tion type cause conversions and yield result types in a similar way.
The purpose is to yield a common type,which is also the type of the
result. This pattern is called the usual arithmetic conversions,
which are defined as follows:
…
–Otherwise,the integral promotions (conv.prom) shall be performed
on both operands.1)
和
4.5 Integral promotions
1 An rvalue of type char,signed char,unsigned char,short int,or
unsigned short int can be converted to an rvalue of type int if int
can represent all the values of the source type; otherwise,the source
rvalue can be converted to an rvalue of type unsigned int
…
4 An rvalue of type bool can be converted to an rvalue of type int,with
false becoming zero and true becoming one.
在您的情况下,LHS和RHS都将在算术运算之前被提升为int,结果将是int类型.
