[all-commits] [llvm/llvm-project] c45dd4: [libc++] Fix num_get base parsing (#170460)

[Nikolas Klauser via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c45dd4360a4eaaf09014924f8e06b1cd5d0cd034
      https://github.com/llvm/llvm-project/commit/c45dd4360a4eaaf09014924f8e06b1cd5d0cd034
  Author: Nikolas Klauser <nikolasklauser at berlin.de>
  Date:   2025-12-04 (Thu, 04 Dec 2025)

  Changed paths:
    M libcxx/include/__locale_dir/num.h
    M libcxx/test/std/localization/locale.categories/category.numeric/locale.num.get/facet.num.get.members/get_long.pass.cpp

  Log Message:
  -----------
  [libc++] Fix num_get base parsing (#170460)

This fixes two bugs reported in #121795 and adds regression tests.
Specifically, these bugs are in the base detection mechanism. The first
bug is that the out parameter isn't set when the stream only contains
zero and after that is the end of the stream. The second one is that we
don't consider `0` to be a number, and instead we only parse it as the
start of an octal literal.



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