ast-grep-language 0.39.6

This module defines the supported programming languages for ast-grep.

It provides a set of customized languages with expando_char / pre_process_pattern, and a set of stub languages without preprocessing. A rule of thumb: if your language does not accept identifiers like $VAR. You need use impl_lang_expando! macro and a standalone file for testing. Otherwise, you can define it as a stub language using impl_lang!. To see the full list of languages, visit <https://ast-grep.github.io/reference/languages.html>

use ast_grep_language::{LanguageExt, SupportLang};

let lang: SupportLang = "rs".parse().unwrap();
let src = "fn foo() {}";
let root = lang.ast_grep(src);
let found = root.root().find_all("fn $FNAME() {}").next().unwrap();
assert_eq!(found.start_pos().line(), 0);
assert_eq!(found.text(), "fn foo() {}");