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Gareth Lloyd
77099ed6b3
Add a guarded "C++ 26 extensions" block (cpp_no_cpp26) covering new
lexical surface introduced since C++23:
- [[ ... ]] attributes as a region, so P3394 annotations carrying a
value expression (eg [[=foo{1}]]) no longer trip cErrInBracket on
their braces/parens. A \w\@1<! look-behind keeps it from matching a
subscripted immediately-invoked lambda (arr[[]{...}()]).
- ^^ reflection operator (P2996).
- [: :] splice brackets (P2996).
- contract_assert keyword (P2900).
Add input/cpp_cpp26.cpp exercising these constructs with screendumps,
and update dumps/cpp_noreturn_00.dump for the new [[ ]] attribute
delimiter highlighting.
closes: #20577
Signed-off-by: Gareth Lloyd <gareth@ignition-web.co.uk>
Signed-off-by: Christian Brabandt <cb@256bit.org>
14 lines
399 B
C++
14 lines
399 B
C++
// C++26 lexical constructs
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// P3394 annotations: [[ ... ]] may carry a value expression.
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[[=rename{"full_name"}]] int braced;
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[[=key(8)]] int parened;
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[[nodiscard]] int plain();
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// P2900 contracts: contract_assert is a keyword.
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void check(int x) { contract_assert(x != 0); }
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// P2996 reflection (^^) and splicing ([: :]).
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constexpr auto refl = ^^int;
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[:refl:] spliced{};
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