tree-sitter / tree-sitter/tree-sitter-cpp
bug: wrong parse tree for new array of pointers
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Description
Did you check existing issues?
- I have read all the tree-sitter docs if it relates to using the parser
- I have searched the existing issues of tree-sitter-cpp
Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)
No response
Describe the bug
Currently parsing of:
int** arrayOfPointers = new int*[10];
is wrong.
Since declarator can only be new_declarator and not a list of declarators which one of them is new_declarator
Steps To Reproduce/Bad Parse Tree
declaration [0, 0] - [0, 37]
type: primitive_type [0, 0] - [0, 3]
declarator: init_declarator [0, 3] - [0, 31]
declarator: pointer_declarator [0, 3] - [0, 21]
declarator: pointer_declarator [0, 4] - [0, 21]
declarator: identifier [0, 6] - [0, 21]
value: new_expression [0, 24] - [0, 31]
type: primitive_type [0, 28] - [0, 31]
ERROR [0, 31] - [0, 36]
lambda_capture_specifier [0, 32] - [0, 36]
number_literal [0, 33] - [0, 35]
Expected Behavior/Parse Tree
Maybe add more declarators for new_expression besides new_declarator?
Repro
int** arrayOfPointers = new int*[10];
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running the reported repro, int** arrayOfPointers = new int*[10];, with the tree-sitter-cpp parser and compare its tree with the expected C++ structure. Read the grammar rules involved in new_expression, new_declarator, and declarators; done means the array-of-pointers expression parses without the reported ERROR node.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100