52 lines
1.3 KiB
Rust
52 lines
1.3 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;
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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_parse::lexer::StripTokens;
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use rustc_session::parse::ParseSess;
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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<Box<ast::Expr>> {
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match panic::catch_unwind(|| {
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let sess = ParseSess::new();
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let name = FileName::Custom("test_precedence".to_string());
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let mut parser = rustc_parse::new_parser_from_source_str(
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&sess,
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name,
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input.to_string(),
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StripTokens::ShebangAndFrontmatter,
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)
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.unwrap();
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let presult = parser.parse_expr();
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match presult {
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Ok(expr) => Some(expr),
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Err(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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