Generator Directives

See here for more information about Generator Directives.

Expression	Attribute	Description
`lower[a]`	`A`	Generate `a` as lower case
`upper[a]`	`A`	Generate `a` as upper case
`left_align[a]`	`A`	Generate `a` left aligned in column of width `BOOST_KARMA_DEFAULT_FIELD_LENGTH`
`left_align(num)[a]`	`A`	Generate `a` left aligned in column of width `num`
`left_align(g)[a]`	`A`	Generate `a` left aligned in column of width `BOOST_KARMA_DEFAULT_FIELD_LENGTH` while using `g` to generate the necessary padding
`left_align(num, g)[a]`	`A`	Generate `a` left aligned in column of width `num` while using `g` to generate the necessary padding
`center[a]`	`A`	Generate `a` centered in column of width `BOOST_KARMA_DEFAULT_FIELD_LENGTH`
`center(num)[a]`	`A`	Generate `a` centered in column of width `num`
`center(g)[a]`	`A`	Generate `a` centered in column of width `BOOST_KARMA_DEFAULT_FIELD_LENGTH` while using `g` to generate the necessary padding
`center(num, g)[a]`	`A`	Generate `a` centered in column of width `num` while using `g` to generate the necessary padding
`right_align[a]`	`A`	Generate `a` right aligned in column of width `BOOST_KARMA_DEFAULT_FIELD_LENGTH`
`right_align(num)[a]`	`A`	Generate `a` right aligned in column of width `num`
`right_align(g)[a]`	`A`	Generate `a` right aligned in column of width `BOOST_KARMA_DEFAULT_FIELD_LENGTH` while using `g` to generate the necessary padding
`right_align(num, g)[a]`	`A`	Generate `a` right aligned in column of width `num` while using `g` to generate the necessary padding
`maxwidth[a]`	`A`	Generate `a` truncated to column of width `BOOST_KARMA_DEFAULT_FIELD_MAXWIDTH`
`maxwidth(num)[a]`	`A`	Generate `a` truncated to column of width `num`
`repeat[a]`	`vector<A>`	Repeat `a` zero or more times
`repeat(num)[a]`	`vector<A>`	Repeat `a` `num` times
`repeat(num1, num2)[a]`	`vector<A>`	Repeat `a` `num1` to `num2` times
`repeat(num, inf)[a]`	`vector<A>`	Repeat `a` `num` or more times
`verbatim[a]`	`A`	Disable delimited generation for `a`. Performs post delimiting.
`delimit[a]`	`A`	Reestablish the delimiter that got inhibited by verbatim
`delimit(d)[a]`	`A`	Use `d` as a delimiter for generating `a`
`no_delimit[a]`	`A`	Disable delimited generation for `a`. No post-delimiting step performed.
`as<T>[]()[a]`	`A`	Force atomic output from arbitrary attribute types
`as_string[][a]`	`A`	Force atomic output from string attributes
`as_wstring[][a]`	`A`	Force atomic output from wide character string attributes
`omit[a]`	`A`	Consume the attribute type of `a` without generating anything. The embedded generator will be always executed.
`skip[a]`	`A`	Consume the attribute type of `a` without generating anything. The embedded generator will never be executed.
`duplicate[a]`	`A`	The supplied attribute will be duplicated and passed unchanged to all embedded elements of a sequence.
`buffer[a]`	`A`	Temporarily intercept the output generated by `a`, flushing it only after `a` succeeded
`columns[a]`	`A`	Generate `a` split into `BOOST_KARMA_DEFAULT_COLUMNS` number of columns using `karma::eol` as column delimiter
`columns(num)[a]`	`A`	Generate `a` split into `num` number of columns using `karma::eol` as column delimiter
`columns(g)[a]`	`A`	Generate `a` split into `BOOST_KARMA_DEFAULT_COLUMNS` number of columns using `g` as column delimiter
`columns(num, g)[a]`	`A`	Generate `a` split into `num` number of columns using `g` as column delimiter

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Generator Directives