bug: a sequence of multiple characters enclosed in single-quotes, e.g., 'abc', causes errors

[tamuratak]

Did you check existing issues?

• [X] I have read all the tree-sitter docs if it relates to using the parser
• [X] I have searched the existing issues of tree-sitter-c

Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)

tree-sitter 0.20.8 (9f398ca955d3329110d31ed523dac5275074948f)

Describe the bug

A sequence of multiple characters enclosed in single-quotes, e.g., 'abc', causes errors. It is valid in C99. See

• https://stackoverflow.com/questions/548289/what-is-the-type-of-an-enum-whose-values-appear-to-be-strings

An integer character constant is a sequence of one or more multibyte characters enclosed in single-quotes, as in 'x'.

Steps To Reproduce/Bad Parse Tree

typedef enum {
    iTunesESrcLibrary = 'kLib',
    iTunesESrcIPod = 'kPod',
    iTunesESrcAudioCD = 'kACD',
    iTunesESrcMP3CD = 'kMCD',
    iTunesESrcDevice = 'kDev',
    iTunesESrcRadioTuner = 'kTun',
    iTunesESrcSharedLibrary = 'kShd',
    iTunesESrcUnknown = 'kUnk'
} iTunesESrc;

This outputs

(translation_unit [0, 0] - [9, 13]
  (type_definition [0, 0] - [9, 13]
    type: (enum_specifier [0, 8] - [9, 1]
      body: (enumerator_list [0, 13] - [9, 1]
        (enumerator [1, 4] - [1, 30]
          name: (identifier [1, 4] - [1, 21])
          value: (char_literal [1, 24] - [1, 30]
            (character [1, 25] - [1, 26])
            (ERROR [1, 26] - [1, 29]
              (identifier [1, 26] - [1, 29]))))
        (enumerator [2, 4] - [2, 27]
          name: (identifier [2, 4] - [2, 18])
          value: (char_literal [2, 21] - [2, 27]
            (character [2, 22] - [2, 23])
            (ERROR [2, 23] - [2, 26]
              (identifier [2, 23] - [2, 26]))))
        (enumerator [3, 4] - [3, 30]
          name: (identifier [3, 4] - [3, 21])
          value: (char_literal [3, 24] - [3, 30]
            (character [3, 25] - [3, 26])
            (ERROR [3, 26] - [3, 29]
              (identifier [3, 26] - [3, 29]))))
        (enumerator [4, 4] - [4, 28]
          name: (identifier [4, 4] - [4, 19])
          value: (char_literal [4, 22] - [4, 28]
            (character [4, 23] - [4, 24])
            (ERROR [4, 24] - [4, 27]
              (identifier [4, 24] - [4, 27]))))
        (enumerator [5, 4] - [5, 29]
          name: (identifier [5, 4] - [5, 20])
          value: (char_literal [5, 23] - [5, 29]
            (character [5, 24] - [5, 25])
            (ERROR [5, 25] - [5, 28]
              (identifier [5, 25] - [5, 28]))))
        (enumerator [6, 4] - [6, 33]
          name: (identifier [6, 4] - [6, 24])
          value: (char_literal [6, 27] - [6, 33]
            (character [6, 28] - [6, 29])
            (ERROR [6, 29] - [6, 32]
              (identifier [6, 29] - [6, 32]))))
        (enumerator [7, 4] - [7, 36]
          name: (identifier [7, 4] - [7, 27])
          value: (char_literal [7, 30] - [7, 36]
            (character [7, 31] - [7, 32])
            (ERROR [7, 32] - [7, 35]
              (identifier [7, 32] - [7, 35]))))
        (enumerator [8, 4] - [8, 30]
          name: (identifier [8, 4] - [8, 21])
          value: (char_literal [8, 24] - [8, 30]
            (character [8, 25] - [8, 26])
            (ERROR [8, 26] - [8, 29]
              (identifier [8, 26] - [8, 29]))))))
    declarator: (type_identifier [9, 2] - [9, 12])))

Expected Behavior/Parse Tree

A sequence of multiple characters enclosed in single-quotes should be parsed without ERRORs.

Repro

No response

[amaanq]

Thanks, I never knew about that actually! - fixed on master