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-rw-r--r--src/test/ui/proc-macro/auxiliary/expand-expr.rs23
-rw-r--r--src/test/ui/proc-macro/auxiliary/re-export.rs19
2 files changed, 39 insertions, 3 deletions
diff --git a/src/test/ui/proc-macro/auxiliary/expand-expr.rs b/src/test/ui/proc-macro/auxiliary/expand-expr.rs
index 5463e79d7..1d6ef8a13 100644
--- a/src/test/ui/proc-macro/auxiliary/expand-expr.rs
+++ b/src/test/ui/proc-macro/auxiliary/expand-expr.rs
@@ -80,13 +80,21 @@ fn assert_ts_eq(lhs: &TokenStream, rhs: &TokenStream) {
pub fn expand_expr_is(input: TokenStream) -> TokenStream {
let mut iter = input.into_iter();
let mut expected_tts = Vec::new();
- loop {
+ let comma = loop {
match iter.next() {
- Some(TokenTree::Punct(ref p)) if p.as_char() == ',' => break,
+ Some(TokenTree::Punct(p)) if p.as_char() == ',' => break p,
Some(tt) => expected_tts.push(tt),
None => panic!("expected comma"),
}
- }
+ };
+
+ // Make sure that `Ident` and `Literal` objects from this proc-macro's
+ // environment are not invalidated when `expand_expr` recursively invokes
+ // another macro by taking a local copy, and checking it after the fact.
+ let pre_expand_span = comma.span();
+ let pre_expand_ident = Ident::new("ident", comma.span());
+ let pre_expand_literal = Literal::string("literal");
+ let pre_expand_call_site = Span::call_site();
let expected = expected_tts.into_iter().collect::<TokenStream>();
let expanded = iter.collect::<TokenStream>().expand_expr().expect("expand_expr failed");
@@ -100,6 +108,15 @@ pub fn expand_expr_is(input: TokenStream) -> TokenStream {
// Also compare the raw tts to make sure they line up.
assert_ts_eq(&expected, &expanded);
+ assert!(comma.span().eq(&pre_expand_span), "pre-expansion span is still equal");
+ assert_eq!(pre_expand_ident.to_string(), "ident", "pre-expansion identifier is still valid");
+ assert_eq!(
+ pre_expand_literal.to_string(),
+ "\"literal\"",
+ "pre-expansion literal is still valid"
+ );
+ assert!(Span::call_site().eq(&pre_expand_call_site), "pre-expansion call-site is still equal");
+
TokenStream::new()
}
diff --git a/src/test/ui/proc-macro/auxiliary/re-export.rs b/src/test/ui/proc-macro/auxiliary/re-export.rs
new file mode 100644
index 000000000..e8e9c9d3e
--- /dev/null
+++ b/src/test/ui/proc-macro/auxiliary/re-export.rs
@@ -0,0 +1,19 @@
+// force-host
+// no-prefer-dynamic
+
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+#[proc_macro]
+pub fn cause_ice(_: TokenStream) -> TokenStream {
+ "
+ enum IceCause {
+ Variant,
+ }
+
+ pub use IceCause::Variant;
+ ".parse().unwrap()
+}