WIP: cxx-qt-gen: override default trycatch when we do not have except…

…ions

crates/cxx-qt-gen/src/writer/cpp/header.rs

@@ -158,6 +158,7 @@ pub fn write_cpp_header(generated: &GeneratedCppBlocks, include_path: &str) -> S
     formatdoc! {r#"
         #pragma once
 
+        #include <cxx-qt/trycatch.h>
         {includes}
 
         {forward_declare}
@@ -255,6 +256,7 @@ mod tests {
         let expected = indoc! {r#"
 #pragma once
 
+#include <cxx-qt/trycatch.h>
 #include <cxx-qt/type.h>
 
 class MyObject;

crates/cxx-qt-gen/src/writer/cpp/mod.rs

@@ -336,6 +336,7 @@ mod tests {
         indoc! {r#"
         #pragma once
 
+        #include <cxx-qt/trycatch.h>
         #include <test>
 
         namespace cxx_qt::my_object {
@@ -390,6 +391,7 @@ mod tests {
         indoc! {r#"
         #pragma once
 
+        #include <cxx-qt/trycatch.h>
         #include <test>
 
         namespace cxx_qt {
@@ -469,6 +471,7 @@ mod tests {
         indoc! {r#"
         #pragma once
 
+        #include <cxx-qt/trycatch.h>
         #include <test>
 
         class MyObject;

crates/cxx-qt-gen/test_outputs/inheritance.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cxx-qt/trycatch.h>
 #include <cxx-qt/type.h>
 
 class MyObject;

crates/cxx-qt-gen/test_outputs/invokables.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cxx-qt/threading.h>
+#include <cxx-qt/trycatch.h>
 #include <cxx-qt/type.h>
 
 namespace cxx_qt::my_object {

crates/cxx-qt-gen/test_outputs/passthrough_and_naming.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cxx-qt/signalhandler.h>
+#include <cxx-qt/trycatch.h>
 #include <cxx-qt/type.h>
 
 namespace cxx_qt::multi_object {

crates/cxx-qt-gen/test_outputs/properties.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cxx-qt/signalhandler.h>
+#include <cxx-qt/trycatch.h>
 #include <cxx-qt/type.h>
 
 namespace cxx_qt::my_object {

crates/cxx-qt-gen/test_outputs/qenum.h

@@ -3,6 +3,7 @@
 #include <QtCore/QObject>
 #include <QtQml/QQmlEngine>
 #include <cstdint>
+#include <cxx-qt/trycatch.h>
 #include <cxx-qt/type.h>
 
 namespace cxx_qt::my_object {

crates/cxx-qt-gen/test_outputs/signals.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cxx-qt/signalhandler.h>
+#include <cxx-qt/trycatch.h>
 #include <cxx-qt/type.h>
 
 namespace cxx_qt::my_object {

crates/cxx-qt/build.rs

@@ -22,6 +22,7 @@ fn write_headers() {
         "signalhandler.h",
         "thread.h",
         "threading.h",
+        "trycatch.h",
         "type.h",
     ] {
         println!("cargo::rerun-if-changed=include/{file_path}");

crates/cxx-qt/include/trycatch.h

@@ -0,0 +1,24 @@
+// clang-format off
+// SPDX-FileCopyrightText: 2024 Klarälvdalens Datakonsult AB, a KDAB Group company <[email protected]>
+// clang-format on
+// SPDX-FileContributor: Andrew Hayzen <[email protected]>
+//
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+// When building with no exceptions ensure we do not have a try catch
+// error: cannot use 'try' with exceptions disabled
+// So override the default trycatch from CXX
+#if defined(RUST_CXX_NO_EXCEPTIONS)
+namespace rust {
+namespace behavior {
+
+template<typename Try, typename Fail>
+static void
+trycatch(Try&& func, Fail&& fail) noexcept
+{
+  func();
+}
+
+} // namespace behavior
+} // namespace rust
+#endif

crates/cxx-qt/src/lib.rs

@@ -345,6 +345,7 @@ pub fn write_headers(directory: impl AsRef<Path>) {
         ),
         (include_str!("../include/thread.h"), "thread.h"),
         (include_str!("../include/threading.h"), "threading.h"),
+        (include_str!("../include/trycatch.h"), "trycatch.h"),
         (include_str!("../include/type.h"), "type.h"),
     ] {
         // Note that we do not need rerun-if-changed for these files