| use crate::tests::{matches_codepattern, string_to_crate}; |
| |
| use rustc_ast_pretty::pprust; |
| use syntax::ast::{self, Ident}; |
| use syntax::mut_visit::{self, MutVisitor}; |
| use syntax::with_default_globals; |
| |
| // This version doesn't care about getting comments or doc-strings in. |
| fn fake_print_crate(s: &mut pprust::State<'_>, krate: &ast::Crate) { |
| s.print_mod(&krate.module, &krate.attrs) |
| } |
| |
| // Change every identifier to "zz". |
| struct ToZzIdentMutVisitor; |
| |
| impl MutVisitor for ToZzIdentMutVisitor { |
| fn visit_ident(&mut self, ident: &mut ast::Ident) { |
| *ident = Ident::from_str("zz"); |
| } |
| fn visit_mac(&mut self, mac: &mut ast::Mac) { |
| mut_visit::noop_visit_mac(mac, self) |
| } |
| } |
| |
| // Maybe add to `expand.rs`. |
| macro_rules! assert_pred { |
| ($pred:expr, $predname:expr, $a:expr , $b:expr) => {{ |
| let pred_val = $pred; |
| let a_val = $a; |
| let b_val = $b; |
| if !(pred_val(&a_val, &b_val)) { |
| panic!("expected args satisfying {}, got {} and {}", $predname, a_val, b_val); |
| } |
| }}; |
| } |
| |
| // Make sure idents get transformed everywhere. |
| #[test] |
| fn ident_transformation() { |
| with_default_globals(|| { |
| let mut zz_visitor = ToZzIdentMutVisitor; |
| let mut krate = |
| string_to_crate("#[a] mod b {fn c (d : e, f : g) {h!(i,j,k);l;m}}".to_string()); |
| zz_visitor.visit_crate(&mut krate); |
| assert_pred!( |
| matches_codepattern, |
| "matches_codepattern", |
| pprust::to_string(|s| fake_print_crate(s, &krate)), |
| "#[zz]mod zz{fn zz(zz:zz,zz:zz){zz!(zz,zz,zz);zz;zz}}".to_string() |
| ); |
| }) |
| } |
| |
| // Make sure idents get transformed even inside macro defs. |
| #[test] |
| fn ident_transformation_in_defs() { |
| with_default_globals(|| { |
| let mut zz_visitor = ToZzIdentMutVisitor; |
| let mut krate = string_to_crate( |
| "macro_rules! a {(b $c:expr $(d $e:token)f+ => \ |
| (g $(d $d $e)+))} " |
| .to_string(), |
| ); |
| zz_visitor.visit_crate(&mut krate); |
| assert_pred!( |
| matches_codepattern, |
| "matches_codepattern", |
| pprust::to_string(|s| fake_print_crate(s, &krate)), |
| "macro_rules! zz{(zz$zz:zz$(zz $zz:zz)zz+=>(zz$(zz$zz$zz)+))}".to_string() |
| ); |
| }) |
| } |