标记摘要

token
keyword **

identifier

constant

string-literal

operator

punctuator

preprocessing-token:
header-name **

identifier

pp-number

character-constant

string-literal

operator punctuator

不能成为上述项目之一的每个非空白字符

header-name:
< **** path-spec > " path spec "

path-spec:
合法文件路径

pp-number:
digit

. digit

pp-number digit

pp-number nondigit

pp-number e sign

pp-number E sign

pp-number .

另请参阅

词法语法