c++ - 裸 char32_t 是签名的还是未签名的？

Question

同样，裸 char16_t 是有符号的还是无符号的？是否定义了实现？

Answer 1

来自标准(C++11 前草案 n3290，或 C++11 后草案 n3337)§3.9.1 基本类型:

Types char16_t and char32_t denote distinct types with the same size, signedness, and alignment as uint_least16_t and uint_least32_t, respectively, in <stdint.h>, called the underlying types.

uint_least16_t和 uint_least32_t都是无符号的(来自 §18.4.1 标题 <cstdint> 概要)，所以对于 char16_t和 char32_t .