bug: error on const generics

[Matthias Krüger]

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

the issued code looks ok on first glance, maybe just don't emit an error? code compile s fine.

Steps To Reproduce/Bad Parse Tree

source_file [0, 0] - [4, 0]
struct_item [0, 0] - [3, 1]
visibility_modifier [0, 0] - [0, 3]
name: type_identifier [0, 11] - [0, 15]
type_parameters: type_parameters [0, 15] - [0, 45]
constrained_type_parameter [0, 16] - [0, 24]
left: type_identifier [0, 16] - [0, 17]
bounds: trait_bounds [0, 17] - [0, 24]
type_identifier [0, 19] - [0, 24]
const_parameter [0, 26] - [0, 40]
name: identifier [0, 32] - [0, 33]
type: primitive_type [0, 35] - [0, 40]
ERROR [0, 41] - [0, 44]
integer_literal [0, 43] - [0, 44]
body: field_declaration_list [0, 46] - [3, 1]
field_declaration [1, 4] - [1, 16]
name: field_identifier [1, 4] - [1, 8]
type: array_type [1, 10] - [1, 16]
element: type_identifier [1, 11] - [1, 12]
length: identifier [1, 14] - [1, 15]
field_declaration [2, 4] - [2, 14]
name: field_identifier [2, 4] - [2, 9]
type: array_type [2, 11] - [2, 14]
element: type_identifier [2, 12] - [2, 13]

Expected Behavior/Parse Tree

source_file [0, 0] - [4, 0]
struct_item [0, 0] - [3, 1]
visibility_modifier [0, 0] - [0, 3]
name: type_identifier [0, 11] - [0, 15]
type_parameters: type_parameters [0, 15] - [0, 45]
constrained_type_parameter [0, 16] - [0, 24]
left: type_identifier [0, 16] - [0, 17]
bounds: trait_bounds [0, 17] - [0, 24]
type_identifier [0, 19] - [0, 24]
const_parameter [0, 26] - [0, 40]
name: identifier [0, 32] - [0, 33]
type: primitive_type [0, 35] - [0, 40]
integer_literal [0, 43] - [0, 44]
body: field_declaration_list [0, 46] - [3, 1]
field_declaration [1, 4] - [1, 16]
name: field_identifier [1, 4] - [1, 8]
type: array_type [1, 10] - [1, 16]
element: type_identifier [1, 11] - [1, 12]
length: identifier [1, 14] - [1, 15]
field_declaration [2, 4] - [2, 14]
name: field_identifier [2, 4] - [2, 9]
type: array_type [2, 11] - [2, 14]
element: type_identifier [2, 12] - [2, 13]

Repro

pub struct Loaf<T: Sized, const N: usize = 1> {
    head: [T; N],
    slice: [T],
}