Rollup merge of #112642 - compiler-errors:interp-lit-err, r=nnethercote

Handle interpolated literal errors

Not sure why it was doing a whole dance to re-match on the token kind when it seems like `Lit::from_token` does the right thing for both macro-arg and regular literals. Nothing seems to have regressed diagnostics-wise from the change, though.

Fixes #112622

r? ``@nnethercote``

2 files changed, 18 insertions, 0 deletions

diff --git a/tests/ui/parser/lit-err-in-macro.rs b/tests/ui/parser/lit-err-in-macro.rs
new file mode 100644
index 00000000000..cff8ee6b40c
--- /dev/null
+++ b/tests/ui/parser/lit-err-in-macro.rs
@@ -0,0 +1,10 @@
+macro_rules! f {
+    ($abi:literal) => {
+        extern $abi fn f() {}
+    }
+}
+
+f!("Foo"__);
+//~^ ERROR suffixes on string literals are invalid
+
+fn main() {}
diff --git a/tests/ui/parser/lit-err-in-macro.stderr b/tests/ui/parser/lit-err-in-macro.stderr
new file mode 100644
index 00000000000..a61fb5c85d4
--- /dev/null
+++ b/tests/ui/parser/lit-err-in-macro.stderr
@@ -0,0 +1,8 @@
+error: suffixes on string literals are invalid
+  --> $DIR/lit-err-in-macro.rs:7:4
+   |
+LL | f!("Foo"__);
+   |    ^^^^^^^ invalid suffix `__`
+
+error: aborting due to previous error
+