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Don't include <regex> in header files

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This reduces compilation time by ~15 seconds (CPU time).

Issue #4045.
This commit is contained in:
Eelco Dolstra 2020-09-21 18:22:45 +02:00
parent cbe0bb29f4
commit e8e1d420f3
16 changed files with 96 additions and 53 deletions
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18
src/libexpr/primops.cc
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@ -3085,17 +3085,25 @@ static RegisterPrimOp primop_hashString({
.fun = prim_hashString,
});
/* Match a regular expression against a string and return either
‘null’ or a list containing substring matches. */
struct RegexCache
{
std::unordered_map<std::string, std::regex> cache;
};
std::shared_ptr<RegexCache> makeRegexCache()
{
return std::make_shared<RegexCache>();
}
void prim_match(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
auto re = state.forceStringNoCtx(*args[0], pos);
try {
auto regex = state.regexCache.find(re);
if (regex == state.regexCache.end())
regex = state.regexCache.emplace(re, std::regex(re, std::regex::extended)).first;
auto regex = state.regexCache->cache.find(re);
if (regex == state.regexCache->cache.end())
regex = state.regexCache->cache.emplace(re, std::regex(re, std::regex::extended)).first;
PathSet context;
const std::string str = state.forceString(*args[1], context, pos);