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Clarify why we don't check argument id

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Victor Zverovich 2020-04-25 10:02:00 -07:00
parent 1e1ac6e964
commit cb475cb884
1 changed files with 2 additions and 0 deletions
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include/fmt/core.h
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@ -594,6 +594,8 @@ class basic_format_parse_context : private ErrorHandler {
the next argument index and switches to the automatic indexing. the next argument index and switches to the automatic indexing.
*/ */
FMT_CONSTEXPR int next_arg_id() { FMT_CONSTEXPR int next_arg_id() {
// Don't check if the argument id is valid to avoid overhead and because it
// will be checked during formatting anyway.
if (next_arg_id_ >= 0) return next_arg_id_++; if (next_arg_id_ >= 0) return next_arg_id_++;
on_error("cannot switch from manual to automatic argument indexing"); on_error("cannot switch from manual to automatic argument indexing");
return 0; return 0;