52 lines
1.4 KiB
Rust
52 lines
1.4 KiB
Rust
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extern crate rustc_ast;
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extern crate rustc_driver;
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extern crate rustc_expand;
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extern crate rustc_parse as parse;
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extern crate rustc_session;
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extern crate rustc_span;
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use rustc_ast::ast;
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use rustc_ast::ptr::P;
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use rustc_session::parse::ParseSess;
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use rustc_span::source_map::FilePathMapping;
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use rustc_span::FileName;
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use std::panic;
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pub fn librustc_expr(input: &str) -> Option<P<ast::Expr>> {
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match panic::catch_unwind(|| {
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let locale_resources = rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec();
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let file_path_mapping = FilePathMapping::empty();
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let sess = ParseSess::new(locale_resources, file_path_mapping);
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let e = parse::new_parser_from_source_str(
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&sess,
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FileName::Custom("test_precedence".to_string()),
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input.to_string(),
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)
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.parse_expr();
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match e {
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Ok(expr) => Some(expr),
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Err(mut diagnostic) => {
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diagnostic.emit();
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None
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}
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}
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}) {
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Ok(Some(e)) => Some(e),
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Ok(None) => None,
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Err(_) => {
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errorf!("librustc panicked\n");
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None
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}
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}
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}
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pub fn syn_expr(input: &str) -> Option<syn::Expr> {
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match syn::parse_str(input) {
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Ok(e) => Some(e),
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Err(msg) => {
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errorf!("syn failed to parse\n{:?}\n", msg);
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None
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}
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}
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}
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