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use super::*;
use crate::ast::{self, Ident};
use crate::tests::{string_to_crate, matches_codepattern};
use crate::print::pprust;
use crate::mut_visit;
use crate::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());
})
}
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