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tree-sitter-rust
Advanced tools
Rust grammar for tree-sitter
Speed - When initially parsing a file, tree-sitter-rust
takes around twice as long as Rustc's hand-coded parser.
$ wc -l examples/ast.rs
2157 examples/ast.rs
$ rustc -Z ast-json-noexpand -Z time-passes examples/ast.rs | head -n1
time: 0.007 parsing # (7 ms)
$ tree-sitter parse examples/ast.rs --quiet --time
examples/ast.rs 16 ms
But if you edit the file after parsing it, this parser can generally update the previous existing syntax tree to reflect your edit in less than a millisecond, thanks to Tree-sitter's incremental parsing system.
Token tree parsing - The content of a macro definition or macro invocation is treated by the Rust parser as a token tree - a sequence of tokens with no structure except for the matching of the delimiters ()
, []
, and {}
. In practice though, many arguments to macros are valid rust expressions or declarations. For code analysis tasks like syntax highlighting, it's useful to understand the structure of this code.
Tree-sitter-rust
attempts to parse the contents of token trees as expressions and declarations, falling back to unstructured token sequences if it can't find a structured interpretation. Because of Tree-sitter's efficient ambiguity handling, this additional parsing adds only a small performance cost.
FAQs
Rust grammar for tree-sitter
The npm package tree-sitter-rust receives a total of 4,152 weekly downloads. As such, tree-sitter-rust popularity was classified as popular.
We found that tree-sitter-rust demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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