Open
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-rust
Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)
No response
Describe the bug
Parsing more than one attribute item of a parameter will produce an error.
I think that the problem is in grammar.js:
parameters: $ => seq(
'(',
sepBy(',', seq(
optional($.attribute_item),
choice(
$.parameter,
$.self_parameter,
$.variadic_parameter,
'_',
$._type,
))),
optional(','),
')',
),instead of optional($.attribute_item) there should be:
optional(seq($.attribute_item))
Steps To Reproduce/Bad Parse Tree
The following code:
fn func(
#[allow(unused)]
#[allow(non_snake_case)]
param: i32
) -> i32 {
return 10;
}Produces this parse tree:
source_file [0, 0] - [8, 0]
function_item [0, 0] - [6, 1]
name: identifier [0, 3] - [0, 7]
parameters: parameters [0, 7] - [4, 1]
ERROR [1, 4] - [1, 20]
attribute_item [1, 4] - [1, 20]
attribute [1, 6] - [1, 19]
identifier [1, 6] - [1, 11]
arguments: token_tree [1, 11] - [1, 19]
identifier [1, 12] - [1, 18]
attribute_item [2, 4] - [2, 28]
attribute [2, 6] - [2, 27]
identifier [2, 6] - [2, 11]
arguments: token_tree [2, 11] - [2, 27]
identifier [2, 12] - [2, 26]
parameter [3, 4] - [3, 14]
pattern: identifier [3, 4] - [3, 9]
type: primitive_type [3, 11] - [3, 14]
return_type: primitive_type [4, 5] - [4, 8]
body: block [4, 9] - [6, 1]
expression_statement [5, 4] - [5, 14]
return_expression [5, 4] - [5, 13]
integer_literal [5, 11] - [5, 13]
Expected Behavior/Parse Tree
Both of the attributes should be parsed correctly
Repro
fn func(
#[allow(unused)]
#[allow(non_snake_case)]
param: i32
) -> i32 {
return 10;
}