[all-commits] [llvm/llvm-project] f2b40b: [libc++][format] Fix precision parser conformance.

[mordante via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f2b40ba40004bfb70d90e9787ad8c9ab6d85646b
      https://github.com/llvm/llvm-project/commit/f2b40ba40004bfb70d90e9787ad8c9ab6d85646b
  Author: Mark de Wever <koraq at xs4all.nl>
  Date:   2022-01-05 (Wed, 05 Jan 2022)

  Changed paths:
    M libcxx/include/__format/parser_std_format_spec.h
    M libcxx/test/libcxx/utilities/format/format.string/format.string.std/std_format_spec_string.pass.cpp
    M libcxx/test/std/utilities/format/format.functions/format_tests.h

  Log Message:
  -----------
  [libc++][format] Fix precision parser conformance.

@CaseyCarter reported that the tests for the std-format-spec rejects leading
zeroes for precision, which the Standard does not require. The Standard allows
them. Only for precision, not for the width or an arg-id.

Fixes the precision parser and adds some test for the arg-id since they
were missing.

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D116381