Block #[cfg] attributes on exported or inner functions

codegen/ui_tests/export_fn_cfg.rs

@@ -0,0 +1,25 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+pub struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[cfg(not(feature = "foo"))]
+#[export_fn]
+pub fn test_fn(input: Point) -> bool {
+    input.x > input.y
+}
+
+fn main() {
+    let n = Point {
+        x: 0.0,
+        y: 10.0,
+    };
+    if test_fn(n) {
+        println!("yes");
+    } else {
+        println!("no");
+    }
+}

codegen/ui_tests/export_fn_cfg.stderr

@@ -0,0 +1,11 @@
+error: cfg attributes not allowed on this item
+ --> $DIR/export_fn_cfg.rs:9:1
+  |
+9 | #[cfg(not(feature = "foo"))]
+  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error[E0425]: cannot find function `test_fn` in this scope
+  --> $DIR/export_fn_cfg.rs:20:8
+   |
+20 |     if test_fn(n) {
+   |        ^^^^^^^ not found in this scope

codegen/ui_tests/module_cfg_fn.rs

@@ -0,0 +1,27 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+pub struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_module {
+    #[cfg(not(feature = "foo"))]
+    pub fn test_fn(input: Point) -> bool {
+        input.x > input.y
+    }
+}
+
+fn main() {
+    let n = Point {
+        x: 0.0,
+        y: 10.0,
+    };
+    if test_module::test_fn(n) {
+        println!("yes");
+    } else {
+        println!("no");
+    }
+}

codegen/ui_tests/module_cfg_fn.stderr

@@ -0,0 +1,11 @@
+error: cfg attributes not allowed on this item
+  --> $DIR/module_cfg_fn.rs:11:5
+   |
+11 |     #[cfg(not(feature = "foo"))]
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error[E0433]: failed to resolve: use of undeclared type or module `test_module`
+  --> $DIR/module_cfg_fn.rs:22:8
+   |
+22 |     if test_module::test_fn(n) {
+   |        ^^^^^^^^^^^ use of undeclared type or module `test_module`