[all-commits] [llvm/llvm-project] 4480e6: [YAMLParser] Improve plain scalar spec compliance ...

[akirchhoff-modular via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4480e650b3cf7cc63cfd3767cd6b120f8bfad2ac
      https://github.com/llvm/llvm-project/commit/4480e650b3cf7cc63cfd3767cd6b120f8bfad2ac
  Author: akirchhoff-modular <29713761+akirchhoff-modular at users.noreply.github.com>
  Date:   2023-10-17 (Tue, 17 Oct 2023)

  Changed paths:
    M llvm/lib/Support/YAMLParser.cpp
    M llvm/test/CodeGen/MIR/Generic/first-character-parse-error.mir
    A llvm/test/YAMLParser/plain-characters.test
    M llvm/unittests/Support/YAMLIOTest.cpp
    M llvm/unittests/Support/YAMLParserTest.cpp

  Log Message:
  -----------
  [YAMLParser] Improve plain scalar spec compliance (#68946)

The `YAMLParser.h` header file claims support for YAML 1.2 with a few
deviations, but our plain scalar parsing failed to parse some valid YAML
according to the spec. This change puts us more in compliance with the
YAML spec, now letting us parse plain scalars containing additional
special characters in cases where they are not ambiguous.