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This reduces the size of <regex> a little. This is one of the largest and slowest headers in the library. By using <bits/stl_algobase.h> and <bits/stl_algo.h> instead of <algorithm> we don't need to parse all the parallel algorithms and std::ranges:: algorithms that are not needed by <regex>. Similarly, by using <bits/stl_tree.h> and <bits/stl_map.h> instead of <map> we don't need to parse the definition of std::multimap. The _State_info type is not movable or copyable, so doesn't need to use std::unique_ptr<bool[]> to manage a bitset, we can just delete it in the destructor. It would use a lot less space if we used a bitset instead, but that would be an ABI break. We could do it for the versioned namespace, but this patch doesn't do so. For future reference, using vector<bool> would work, but would increase sizeof(_State_info) by two pointers, because it's three times as large as unique_ptr<bool[]>. We can't use std::bitset because the length isn't constant. We want a bitset with a non-constant but fixed length. Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * include/bits/regex_executor.h (_State_info): Replace unique_ptr<bool[]> with array of bool. * include/bits/regex_executor.tcc: Likewise. * include/bits/regex_scanner.tcc: Replace std::strchr with __builtin_strchr. * include/std/regex: Replace standard headers with smaller internal ones. * testsuite/28_regex/traits/char/lookup_classname.cc: Include <string.h> for strlen. * testsuite/28_regex/traits/char/lookup_collatename.cc: Likewise. |
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| .. | ||
| 17_intro | ||
| 18_support | ||
| 19_diagnostics | ||
| 20_util | ||
| 21_strings | ||
| 22_locale | ||
| 23_containers | ||
| 24_iterators | ||
| 25_algorithms | ||
| 26_numerics | ||
| 27_io | ||
| 28_regex | ||
| 29_atomics | ||
| 30_threads | ||
| abi | ||
| backward | ||
| config | ||
| data | ||
| decimal | ||
| experimental | ||
| ext | ||
| lib | ||
| libstdc++-abi | ||
| libstdc++-dg | ||
| libstdc++-prettyprinters | ||
| libstdc++-xmethods | ||
| performance | ||
| special_functions | ||
| std | ||
| tr1 | ||
| tr2 | ||
| util | ||
| Makefile.am | ||
| Makefile.in | ||