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Mark steps as definite on query construction

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* Add a ts_query_pattern_is_definite API, just for debugging this
* Store state_count on TSLanguage structs, to allow for scanning parse tables
This commit is contained in:
Max Brunsfeld 2020-06-08 16:07:22 -07:00
parent 6a46dff89a
commit 4c2f36a07b
10 changed files with 755 additions and 76 deletions
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13
lib/binding_rust/bindings.rs
View file

@ -172,9 +172,9 @@ extern "C" {
#[doc = " the given ranges must be ordered from earliest to latest in the document,"]
#[doc = " and they must not overlap. That is, the following must hold for all"]
#[doc = " `i` < `length - 1`:"]
#[doc = " ```text"]
#[doc = ""]
#[doc = " ranges[i].end_byte <= ranges[i + 1].start_byte"]
#[doc = " ```"]
#[doc = ""]
#[doc = " If this requirement is not satisfied, the operation will fail, the ranges"]
#[doc = " will not be assigned, and this function will return `false`. On success,"]
#[doc = " this function returns `true`"]
@ -649,6 +649,13 @@ extern "C" {
length: *mut u32,
) -> *const TSQueryPredicateStep;
}
extern "C" {
pub fn ts_query_pattern_is_definite(
self_: *const TSQuery,
pattern_index: u32,
step_index: u32,
) -> bool;
}
extern "C" {
#[doc = " Get the name and length of one of the query\'s captures, or one of the"]
#[doc = " query\'s string literals. Each capture and string is associated with a"]
@ -800,5 +807,5 @@ extern "C" {
pub fn ts_language_version(arg1: *const TSLanguage) -> u32;
}
pub const TREE_SITTER_LANGUAGE_VERSION: usize = 11;
pub const TREE_SITTER_LANGUAGE_VERSION: usize = 12;
pub const TREE_SITTER_MIN_COMPATIBLE_LANGUAGE_VERSION: usize = 9;

8
lib/binding_rust/lib.rs
View file

@ -1449,6 +1449,14 @@ impl Query {
unsafe { ffi::ts_query_disable_pattern(self.ptr.as_ptr(), index as u32) }
}
/// Check if a pattern will definitely match after a certain number of steps
/// have matched.
pub fn pattern_is_definite(&self, index: usize, step_index: usize) -> bool {
unsafe {
ffi::ts_query_pattern_is_definite(self.ptr.as_ptr(), index as u32, step_index as u32)
}
}
fn parse_property(
function_name: &str,
capture_names: &[String],