[all-commits] [llvm/llvm-project] b29301: [libc++][format] Handle range-underlying-spec (#81...

[Po-yao Chang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b29301cd40441b5eb8cef9356429fb081e6b6a72
      https://github.com/llvm/llvm-project/commit/b29301cd40441b5eb8cef9356429fb081e6b6a72
  Author: Po-yao Chang <poyaoc97 at gmail.com>
  Date:   2024-03-04 (Mon, 04 Mar 2024)

  Changed paths:
    M libcxx/include/__format/parser_std_format_spec.h
    M libcxx/test/std/containers/container.adaptors/container.adaptors.format/format.functions.tests.h
    M libcxx/test/std/containers/sequences/vector.bool/vector.bool.fmt/format.functions.tests.h
    M libcxx/test/std/utilities/format/format.range/format.range.fmtmap/format.functions.tests.h
    M libcxx/test/std/utilities/format/format.range/format.range.fmtset/format.functions.tests.h
    M libcxx/test/std/utilities/format/format.range/format.range.fmtstr/format.functions.tests.h
    M libcxx/test/std/utilities/format/format.range/format.range.formatter/format.functions.tests.h
    M libcxx/test/std/utilities/format/format.tuple/format.functions.tests.h

  Log Message:
  -----------
  [libc++][format] Handle range-underlying-spec (#81914)

An immediate colon signifeis that the range-format-spec contains only
range-underlying-spec.

This patch allows this code to compile and run:
```c++
std::println("{::<<9?}", std::span<const char>{"Hello", sizeof "Hello"});
```



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