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optimized std::stack usage in simplecpp::TokenList::combineOperators() #659

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optimized std::stack usage in simplecpp::TokenList::combineOperators() #659

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3ef1187
use `std::vector` as underlying container for `std::stack` in `simple…
firewave Jun 10, 2026
a80a3ea
initialize `std::stack` with intial value instead of inserting it in …
firewave Jun 10, 2026
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3 changes: 1 addition & 2 deletions simplecpp.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1031,8 +1031,7 @@ static bool isAlternativeAndBitandBitor(const simplecpp::Token* tok)

void simplecpp::TokenList::combineOperators()
{
std::stack<bool> executableScope;
executableScope.push(false);
std::stack<bool, std::vector<bool>> executableScope{{false}};

@danmar danmar Jun 20, 2026

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isn't std::vector<bool> bad to use overall in c++11..
are you sure that all usage here will work fine..

@firewave firewave Jun 20, 2026

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As this is about performance and valgrind indicates that is fine in either compiler so I see no problem.

libc++ has been adding special handling for vector<bool> and we are also not using it as a bit field here (which is the common usage for that IIRC).

for (Token *tok = front(); tok; tok = tok->next) {
if (tok->op == '{') {
if (executableScope.top()) {
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