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fix: prevent size_t-max length string allocation

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prevent an issue, where a string was created with size_t(0)-1 length.

When creating underlines for error output, the current column sometimes had cases
where it was set to 0 caused an underflow.
This commit is contained in:
hayt
2024-09-22 10:15:47 +02:00
parent 4b74012723
commit b0d9e81d85
1 changed files with 3 additions and 1 deletions
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4
include/toml11/impl/source_location_impl.hpp
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@@ -116,7 +116,9 @@ TOML11_INLINE std::ostringstream& format_underline(std::ostringstream& oss,
oss << make_string(lnw + 1, ' ') oss << make_string(lnw + 1, ' ')
<< color::bold << color::blue << " | " << color::reset; << color::bold << color::blue << " | " << color::reset;
oss << make_string(col-1 /*1-origin*/, ' ') // in case col is 0, so we don't create a string with size_t max length
const std::size_t sanitized_col = col == 0 ? 0 : col - 1 /*1-origin*/;
oss << make_string(sanitized_col, ' ')
<< color::bold << color::red << color::bold << color::red
<< make_string(len, '^') << "-- " << make_string(len, '^') << "-- "
<< color::reset << msg << '\n'; << color::reset << msg << '\n';