Re: [boost] regex format conditional expression question

> How do I use the conditional expression in a format string when my > true_expression is a number? For example the format "(?1foo)" will replace > the 1st subexpression with the string "foo", but how do I replace the 1st > subexpression with 123? I try "(?1123)" and that fails. I can do "(?1 123)"

[boost] regex format conditional expression question

How do I use the conditional expression in a format string when my true_expression is a number? For example the format "(?1foo)" will replace the 1st subexpression with the string "foo", but how do I replace the 1st subexpression with 123? I try "(?1123)" and that fails. I can do "(?1 123)", but it