Rollup merge of #100750 - akabinds:akabinds/improved-invalid-function-qual-error, r=davidtwco

improved diagnostic for function defined with `def`, `fun`, `func`, or `function` instead of `fn`

Closes #99751

1 files changed, 10 insertions, 0 deletions

diff --git a/src/test/ui/parser/fn-defined-using-function.rs b/src/test/ui/parser/fn-defined-using-function.rs
new file mode 100644
index 00000000000..fd8782728e2
--- /dev/null
+++ b/src/test/ui/parser/fn-defined-using-function.rs
@@ -0,0 +1,10 @@
+// Check what happens when `function` is used to define a function, instead of `fn`
+// edition:2021
+
+#![allow(dead_code)]
+
+function foo() {}
+//~^ ERROR expected one of `!` or `::`, found `foo`
+//~^^ HELP write `fn` instead of `function` to declare a function
+
+fn main() {}