14.6.6 Cast expressions
A cast-expression is used to explicitly convert an expression to a given type. cast-expression: ( t
Primary expressions include the simplest forms of expressions. primary-expression: array-creation-ex
A constant-expression is an expression that can be fully evaluated at compile-time. constant-expres
An object-creation-expression is used to create a new instance of a class-type or a value-type. obj
A boolean-expression is an expression that yields a result of type bool. boolean-expression: express
A delegate-creation-expression is used to create a new instance of a delegate-type. delegate-creati
An array-creation-expression is used to create a new instance of an array-type. array-creation-expr
12.3.3.20 General rules for expressions with embedded expressions The following rules apply to these
9.5.2 Pre-processing expressions Pre-processing expressions can occur in #if and #elif directives. T
修改文本 1、Perl中的替换表达式为： $var =~ s/regex/replacement/ 可以在replacement中使用$1等变量 2、Perl中<>表示一行文本 3