Boost C++ Libraries

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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.

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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