Do this by putting an ABAP string, charactervariable, or table variable in parentheses.
这种表示法把abap字符串、字符变量或表变量放在圆括号中。
2
The first time around, the templated version of f is called, with a string as the first argument type, and the character and double are packed off as the variable size argument.
首先调用 f 的模板化版本，第一个参数的类型是字符串，作为大小可变的参数提供字符和双精度值。
3
In the Viper 2 release, there is a new DBA configuration parameter that prevents any parsing of XML from a CHAR-type host variable or characterstring.