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-rw-r--r--src/test/ui/rfc-2091-track-caller/call-chain.rs26
1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/rfc-2091-track-caller/call-chain.rs b/src/test/ui/rfc-2091-track-caller/call-chain.rs
new file mode 100644
index 000000000..fefb84de7
--- /dev/null
+++ b/src/test/ui/rfc-2091-track-caller/call-chain.rs
@@ -0,0 +1,26 @@
+// run-pass
+
+use std::panic::Location;
+
+struct Foo;
+
+impl Foo {
+ #[track_caller]
+ fn check_loc(&self, line: u32, col: u32) -> &Self {
+ let loc = Location::caller();
+ assert_eq!(loc.file(), file!(), "file mismatch");
+ assert_eq!(loc.line(), line, "line mismatch");
+ assert_eq!(loc.column(), col, "column mismatch");
+ self
+ }
+}
+
+fn main() {
+ // Tests that when `Location::caller` is used in a method chain,
+ // it points to the start of the correct call (the first character after the dot)
+ // instead of to the very first expression in the chain
+ let foo = Foo;
+ foo.
+ check_loc(line!(), 9).check_loc(line!(), 31)
+ .check_loc(line!(), 10);
+}