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C++ Libraries
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Coding Standards
transform_attribute
now has to implement a third function: void
fail(Exposed&),
which normally will do nothing. This function will be called whenever
the right hand side of the rule
(or the embedded parser of attr_cast)
fail parsing. This change affects Qi only. See the
description of the traits::transform_attribute for more
details.
BOOST_FUSION_ADAPT_CLASS
and BOOST_FUSION_ADAPT_CLASS_NAMED.
This support requires to include the new header file: #include
<boost/spirit/include/support_adapt_class_attributes.hpp>.
karma::ostream_iterator as a counterpart to
qi::istream_iterator (see new header file:
#include <boost/spirit/home/support/iterators/ostream_iterator.hpp>).
qi::hold allowing to make sure the embedded
parser does not touch the passed attribute in case it fails parsing.
qi::no_skip directive, which is
equivalent to qi::lexeme,
except that it does not pre-skip.
karma::no_delimit directive, which
is equivalent to karma::verbatim, except that it does
not perform a post-delimiting step.
multi_pass
iterator framework (named buffering_input_iterator)
allowing to wrap underlying input iterators which do not store the last
character read from the input (such as std::istream_iterator).
This is now used as the default input policy.
karma::buffer[karma::buffer[...]] don't result in performing double
buffering anymore. The same is true if an alternative is wrapped into
a karma::buffer[]
directive (as for instance: buffer[a] | b).
multi_pass
iterator is now usable with underlying input iterators which do not store
the last character read from the input (such as std::istream_iterator).
Thanks to Larry Evans and Peter Schueller for independently reporting
this problem.
karma::omit[]
now does not accept an arbitrary attribute type anymore.
karma::omit[] now disable output altogether instead
of intercepting the output into a buffer which got discarded as before.
karma::rule to properly handles optional attributes.
lexer<>::init_dfa()
now takes a single boolean parameter (which defaults to false) allowing to force minimization
of the generated lexer tables.