1 use crate::tests::{matches_codepattern, string_to_crate};
4 use rustc_ast::mut_visit::MutVisitor;
5 use rustc_ast_pretty::pprust;
6 use rustc_span::create_default_session_globals_then;
7 use rustc_span::symbol::Ident;
9 // This version doesn't care about getting comments or doc-strings in.
10 fn print_crate_items(krate: &ast::Crate) -> String {
11 krate.items.iter().map(|i| pprust::item_to_string(i)).collect::<Vec<_>>().join(" ")
14 // Change every identifier to "zz".
15 struct ToZzIdentMutVisitor;
17 impl MutVisitor for ToZzIdentMutVisitor {
18 const VISIT_TOKENS: bool = true;
20 fn visit_ident(&mut self, ident: &mut Ident) {
21 *ident = Ident::from_str("zz");
25 // Maybe add to `expand.rs`.
26 macro_rules! assert_pred {
27 ($pred:expr, $predname:expr, $a:expr , $b:expr) => {{
31 if !(pred_val(&a_val, &b_val)) {
32 panic!("expected args satisfying {}, got {} and {}", $predname, a_val, b_val);
37 // Make sure idents get transformed everywhere.
39 fn ident_transformation() {
40 create_default_session_globals_then(|| {
41 let mut zz_visitor = ToZzIdentMutVisitor;
43 string_to_crate("#[a] mod b {fn c (d : e, f : g) {h!(i,j,k);l;m}}".to_string());
44 zz_visitor.visit_crate(&mut krate);
47 "matches_codepattern",
48 print_crate_items(&krate),
49 "#[zz]mod zz{fn zz(zz:zz,zz:zz){zz!(zz,zz,zz);zz;zz}}".to_string()
54 // Make sure idents get transformed even inside macro defs.
56 fn ident_transformation_in_defs() {
57 create_default_session_globals_then(|| {
58 let mut zz_visitor = ToZzIdentMutVisitor;
59 let mut krate = string_to_crate(
60 "macro_rules! a {(b $c:expr $(d $e:token)f+ => \
64 zz_visitor.visit_crate(&mut krate);
67 "matches_codepattern",
68 print_crate_items(&krate),
69 "macro_rules! zz{(zz$zz:zz$(zz $zz:zz)zz+=>(zz$(zz$zz$zz)+))}".to_string()