refactor(parser): change parser constructor to be const functions

Author: Akagi201

bin/ast-doc/Cargo.toml

@@ -12,8 +12,8 @@ description = "CLI for generating optimized llms.txt documentation from codebase
 readme = "README.md"
 
 [features]
-default = ["all-languages"]
 all-languages = ["ast-doc-core/all-languages"]
+default = ["all-languages"]
 hotpath = ["ast-doc-core/hotpath", "dep:hotpath"]
 
 [dependencies]

crates/ast-doc-core/src/parser/lang/c_parser.rs

@@ -22,12 +22,12 @@ pub struct CParser;
 impl CParser {
     /// Create a new C parser.
     #[must_use]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self
     }
 
     /// Parse source with tree-sitter, returning the tree.
-    fn parse_tree(&self, source: &str) -> Result<Tree, AstDocError> {
+    fn parse_tree(source: &str) -> Result<Tree, AstDocError> {
         let mut parser = Parser::new();
         let language = tree_sitter_c::LANGUAGE;
         parser.set_language(&language.into()).map_err(|e| AstDocError::Parse {
@@ -43,7 +43,7 @@ impl CParser {
 
 impl LanguageParser for CParser {
     fn parse(&self, source: &str, path: &Path) -> Result<ParsedFile, AstDocError> {
-        let tree = self.parse_tree(source)?;
+        let tree = Self::parse_tree(source)?;
         let root_node = tree.root_node();
 
         // C has no standard test markers

crates/ast-doc-core/src/parser/lang/go_parser.rs

@@ -22,12 +22,12 @@ pub struct GoParser;
 impl GoParser {
     /// Create a new Go parser.
     #[must_use]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self
     }
 
     /// Parse source with tree-sitter, returning the tree.
-    fn parse_tree(&self, source: &str) -> Result<Tree, AstDocError> {
+    fn parse_tree(source: &str) -> Result<Tree, AstDocError> {
         let mut parser = Parser::new();
         let language = tree_sitter_go::LANGUAGE;
         parser.set_language(&language.into()).map_err(|e| AstDocError::Parse {
@@ -43,7 +43,7 @@ impl GoParser {
 
 impl LanguageParser for GoParser {
     fn parse(&self, source: &str, path: &Path) -> Result<ParsedFile, AstDocError> {
-        let tree = self.parse_tree(source)?;
+        let tree = Self::parse_tree(source)?;
         let root_node = tree.root_node();
 
         let is_test_file = path.to_string_lossy().ends_with("_test.go");

crates/ast-doc-core/src/parser/lang/python_parser.rs

@@ -22,12 +22,12 @@ pub struct PythonParser;
 impl PythonParser {
     /// Create a new Python parser.
     #[must_use]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self
     }
 
     /// Parse source with tree-sitter, returning the tree.
-    fn parse_tree(&self, source: &str) -> Result<Tree, AstDocError> {
+    fn parse_tree(source: &str) -> Result<Tree, AstDocError> {
         let mut parser = Parser::new();
         let language = tree_sitter_python::LANGUAGE;
         parser.set_language(&language.into()).map_err(|e| AstDocError::Parse {
@@ -43,7 +43,7 @@ impl PythonParser {
 
 impl LanguageParser for PythonParser {
     fn parse(&self, source: &str, path: &Path) -> Result<ParsedFile, AstDocError> {
-        let tree = self.parse_tree(source)?;
+        let tree = Self::parse_tree(source)?;
         let root_node = tree.root_node();
 
         let test_ranges = collect_test_ranges(&root_node, source);

crates/ast-doc-core/src/parser/lang/typescript_parser.rs

@@ -22,12 +22,12 @@ pub struct TypeScriptParser;
 impl TypeScriptParser {
     /// Create a new TypeScript parser.
     #[must_use]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self
     }
 
     /// Parse source with tree-sitter, returning the tree.
-    fn parse_tree(&self, source: &str) -> Result<Tree, AstDocError> {
+    fn parse_tree(source: &str) -> Result<Tree, AstDocError> {
         let mut parser = Parser::new();
         let language = tree_sitter_typescript::LANGUAGE_TYPESCRIPT;
         parser.set_language(&language.into()).map_err(|e| AstDocError::Parse {
@@ -43,7 +43,7 @@ impl TypeScriptParser {
 
 impl LanguageParser for TypeScriptParser {
     fn parse(&self, source: &str, path: &Path) -> Result<ParsedFile, AstDocError> {
-        let tree = self.parse_tree(source)?;
+        let tree = Self::parse_tree(source)?;
         let root_node = tree.root_node();
 
         let test_ranges = collect_test_ranges(&root_node, source);

crates/ast-doc-core/src/parser/mod.rs

@@ -167,7 +167,7 @@ pub fn parse_file(file: &DiscoveredFile, lang: &Language) -> Result<ParsedFile,
         Language::Generic(name) => {
             lang::generic_parser::GenericParser::new(name).parse(&file.content, &file.path)
         }
-        #[allow(unreachable_patterns)]
+        #[expect(unreachable_patterns)]
         _ => Err(AstDocError::UnsupportedLanguage { language: lang.to_string() }),
     }
 }