codegen: add rhai_mod and submodule support

codegen/ui_tests/rhai_mod_bad_attr.rs

@@ -0,0 +1,29 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_module {
+#[rhai_mod(unknown = "thing")]
+pub mod test_mod {
+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/rhai_mod_bad_attr.stderr

@@ -0,0 +1,11 @@
+error: unknown attribute 'unknown'
+  --> $DIR/rhai_mod_bad_attr.rs:11:12
+   |
+11 | #[rhai_mod(unknown = "thing")]
+   |            ^^^^^^^
+
+error[E0433]: failed to resolve: use of undeclared type or module `test_module`
+  --> $DIR/rhai_mod_bad_attr.rs:24:8
+   |
+24 |     if test_module::test_fn(n) {
+   |        ^^^^^^^^^^^ use of undeclared type or module `test_module`

codegen/ui_tests/rhai_mod_bad_value.rs

@@ -0,0 +1,29 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_module {
+#[rhai_mod(name = true)]
+pub mod test_mod {
+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/rhai_mod_bad_value.stderr

@@ -0,0 +1,11 @@
+error: expecting string literal
+  --> $DIR/rhai_mod_bad_value.rs:11:19
+   |
+11 | #[rhai_mod(name = true)]
+   |                   ^^^^
+
+error[E0433]: failed to resolve: use of undeclared type or module `test_module`
+  --> $DIR/rhai_mod_bad_value.rs:24:8
+   |
+24 |     if test_module::test_fn(n) {
+   |        ^^^^^^^^^^^ use of undeclared type or module `test_module`

codegen/ui_tests/rhai_mod_junk_arg.rs

@@ -0,0 +1,29 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_module {
+#[rhai_mod("wheeeee")]
+pub mod test_mod {
+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/rhai_mod_junk_arg.stderr

@@ -0,0 +1,11 @@
+error: expecting identifier
+  --> $DIR/rhai_mod_junk_arg.rs:11:12
+   |
+11 | #[rhai_mod("wheeeee")]
+   |            ^^^^^^^^^
+
+error[E0433]: failed to resolve: use of undeclared type or module `test_module`
+  --> $DIR/rhai_mod_junk_arg.rs:24:8
+   |
+24 |     if test_module::test_fn(n) {
+   |        ^^^^^^^^^^^ use of undeclared type or module `test_module`

codegen/ui_tests/rhai_mod_missing_value.rs

@@ -0,0 +1,29 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_module {
+#[rhai_mod(name)]
+pub mod test_mod {
+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/rhai_mod_missing_value.stderr

@@ -0,0 +1,11 @@
+error: requires value
+  --> $DIR/rhai_mod_missing_value.rs:11:12
+   |
+11 | #[rhai_mod(name)]
+   |            ^^^^
+
+error[E0433]: failed to resolve: use of undeclared type or module `test_module`
+  --> $DIR/rhai_mod_missing_value.rs:24:8
+   |
+24 |     if test_module::test_fn(n) {
+   |        ^^^^^^^^^^^ use of undeclared type or module `test_module`

codegen/ui_tests/rhai_mod_path_attr.rs

@@ -0,0 +1,29 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_module {
+#[rhai_mod(rhai::name = "thing")]
+pub mod test_mod {
+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/rhai_mod_path_attr.stderr

@@ -0,0 +1,11 @@
+error: expecting attribute name
+  --> $DIR/rhai_mod_path_attr.rs:11:12
+   |
+11 | #[rhai_mod(rhai::name = "thing")]
+   |            ^^^^^^^^^^
+
+error[E0433]: failed to resolve: use of undeclared type or module `test_module`
+  --> $DIR/rhai_mod_path_attr.rs:24:8
+   |
+24 |     if test_module::test_fn(n) {
+   |        ^^^^^^^^^^^ use of undeclared type or module `test_module`

codegen/ui_tests/rhai_mod_return_raw.rs

@@ -0,0 +1,29 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_module {
+#[rhai_mod(return_raw = "yes")]
+pub mod test_mod {
+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/rhai_mod_return_raw.stderr

@@ -0,0 +1,11 @@
+error: unknown attribute 'return_raw'
+  --> $DIR/rhai_mod_return_raw.rs:11:12
+   |
+11 | #[rhai_mod(return_raw = "yes")]
+   |            ^^^^^^^^^^
+
+error[E0433]: failed to resolve: use of undeclared type or module `test_module`
+  --> $DIR/rhai_mod_return_raw.rs:24:8
+   |
+24 |     if test_module::test_fn(n) {
+   |        ^^^^^^^^^^^ use of undeclared type or module `test_module`