@comment.inner not working as expected

[samuelborn]

Describe the bug When using the @comment.inner text object, nothing gets selected. @comment.outer works fine.

To Reproduce

1. Add this to your treesitter config.

            textobjects = {
                select = {
                    enable = true,
                    lookahead = true,
                    include_surrounding_whitespace = true,
                    keymaps = {
                        ["ac"] = "@comment.outer",
                        ["ic"] = "@comment.inner",
                    },
                },
            },

2. open cpp file
3. go to line with comment "// ..."
4. use command "cic"
5. nothing happens

Expected behavior

Line in beginning: // Change<cursor> this comment

Line after cic: // <cursor>

Output of :checkhealth nvim-treesitter

nvim-treesitter: require("nvim-treesitter.health").check()

Installation ~
- OK `tree-sitter` found 0.22.5 (parser generator, only needed for :TSInstallFromGrammar)
- OK `node` found v20.12.2 (only needed for :TSInstallFromGrammar)
- OK `git` executable found.
- OK `cc` executable found. Selected from { vim.NIL, "cc", "gcc", "clang", "cl", "zig" }
  Version: cc (GCC) 14.1.1 20240522 (Red Hat 14.1.1-4)
- OK Neovim was compiled with tree-sitter runtime ABI version 14 (required >=13). Parsers must be compatible with runtime ABI.

OS Info:
{
  machine = "x86_64",
  release = "6.8.9-300.fc40.x86_64",
  sysname = "Linux",
  version = "#1 SMP PREEMPT_DYNAMIC Thu May  2 18:59:06 UTC 2024"
} ~

Parser/Features         H L F I J
  - bash                ✓ ✓ ✓ . ✓
  - c                   ✓ ✓ ✓ ✓ ✓
  - cmake               ✓ . ✓ ✓ .
  - cpp                 ✓ ✓ ✓ ✓ ✓
  - csv                 ✓ . . . .
  - gitignore           ✓ . . . .
  - glsl                ✓ ✓ ✓ ✓ ✓
  - html                ✓ ✓ ✓ ✓ ✓
  - lua                 ✓ ✓ ✓ ✓ ✓
  - markdown            ✓ . ✓ ✓ ✓
  - python              ✓ ✓ ✓ ✓ ✓
  - rust                ✓ ✓ ✓ ✓ ✓
  - vim                 ✓ ✓ ✓ . ✓
  - vimdoc              ✓ . . . ✓
  - yaml                ✓ ✓ ✓ ✓ ✓

  Legend: H[ighlight], L[ocals], F[olds], I[ndents], In[j]ections
         +) multiple parsers found, only one will be used
         x) errors found in the query, try to run :TSUpdate {lang} ~

Output of nvim --version

NVIM v0.10.0
Build type: RelWithDebInfo
LuaJIT 2.1.1707061634
Run "nvim -V1 -v" for more info

Additional context

@comment.outer works fine and like expected:

Line in beginning: // Change<cursor> this comment

Line after cac: <cursor>

[ribru17]

This is a limitation with the parser, right now block and line comments are parsed as the same node, and there is no distinction exposed between // and comment content

[kiyoon]

@comment.inner is just not defined for C and it can be added for more languages.

Currently the implementation is simple without a comment parser. It selects comment.outer with an offset.