rust/bindgen: Use Meson rules for C++ headers

Bindgen natively only considers .hpp to be C++ headers, but Meson
considers some additional extensions including .hh and .hxx to be C++.

4 files changed, 50 insertions, 1 deletions

diff --git a/test cases/rust/12 bindgen/meson.build b/test cases/rust/12 bindgen/meson.build
index e36e9e2..840a8af 100644
--- a/test cases/rust/12 bindgen/meson.build
+++ b/test cases/rust/12 bindgen/meson.build
@@ -1,7 +1,7 @@
 # SPDX-license-identifer: Apache-2.0
 # Copyright © 2021-2022 Intel Corporation
 
-project('rustmod bindgen', ['c', 'rust'], meson_version : '>= 0.63')
+project('rustmod bindgen', ['c', 'cpp', 'rust'], meson_version : '>= 0.63')
 
 prog_bindgen = find_program('bindgen', required : false)
 if not prog_bindgen.found()
@@ -107,3 +107,17 @@ gp_exe = executable(
 )
 
 test('global and project arguments', gp_exe)
+
+cpp_lib = static_library('cpplib', 'src/impl.cpp')
+
+cpp_bind = rust.bindgen(
+  input : 'src/header.hpp',
+  output : 'generated-cpp.rs',
+)
+
+cpp_exe = executable(
+  'cpp_exe',
+  structured_sources(['src/cpp.rs', cpp_bind]),
+  link_with : cpp_lib,
+)
+test('cpp', cpp_exe)
diff --git a/test cases/rust/12 bindgen/src/cpp.rs b/test cases/rust/12 bindgen/src/cpp.rs
new file mode 100644
index 0000000..51a594c
--- /dev/null
+++ b/test cases/rust/12 bindgen/src/cpp.rs
@@ -0,0 +1,19 @@
+// SPDX-license-identifer: Apache-2.0
+// Copyright © 2023 Intel Corporation
+
+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+
+include!("generated-cpp.rs");
+
+fn main() {
+    let mut instance = std::mem::MaybeUninit::<MyClass>::uninit();
+    let val: i32;
+    unsafe {
+        MyClass_MyClass(instance.as_mut_ptr());
+        val = instance.assume_init_mut().method();
+    }
+    let success = val == 7;
+    std::process::exit(!success as i32);
+}
diff --git a/test cases/rust/12 bindgen/src/header.hpp b/test cases/rust/12 bindgen/src/header.hpp
new file mode 100644
index 0000000..3f01c5f
--- /dev/null
+++ b/test cases/rust/12 bindgen/src/header.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+class MyClass {
+  public:
+    MyClass();
+    int method() const;
+  private:
+    int val;
+};
diff --git a/test cases/rust/12 bindgen/src/impl.cpp b/test cases/rust/12 bindgen/src/impl.cpp
new file mode 100644
index 0000000..39c8f2e
--- /dev/null
+++ b/test cases/rust/12 bindgen/src/impl.cpp
@@ -0,0 +1,7 @@
+#include "header.hpp"
+
+MyClass::MyClass() : val{7} {};
+
+int MyClass::method() const {
+    return val;
+}