tree-sitter/todo.md

TODO

Handling ambiguity (GLR)

• Add a simple way to specify syntactic ambiguity resolutions in the Grammar (e.g. 'prefer declarations to statements' in C), similar to bison's dprec construct.

Runtime System

• Refactoring: make separate symbol for unexpected characters than for interior error nodes.

Testing / Quality

• Start running the clang-analyzer on the codebase on Travis-CI.
• Use the Valgrind leak checker to fix the memory leaks in the runtime library.
• Randomize the editing in the language tests, using a seed that can be specified in order to reproduce failures.

Ubiquitous token handling

• Fix the unintuitive tree that results when ubiquitous tokens are last child of their parent node.

Error handling

• Use information about nesting depth of tokens like '(' and ')' to make error recovery more accurate.

Grammar Features

• Regexp assertions
  • '^'
  • '$'
  • '\b'
• Composing languages
  • Rule for referencing named grammar
  • Grammar registry object in runtime
  • Parsing returns control to parent language
• Indentation tokens