cxx-qt-gen: add support for i64/u64 for C++ side

Closes #36

Author: ahayzen-kdab

crates/cxx-qt-gen/src/generator/cpp/types.rs

@@ -159,14 +159,12 @@ fn possible_built_in(ty: &str) -> String {
         "u8" => "::std::uint8_t",
         "u16" => "::std::uint16_t",
         "u32" => "::std::uint32_t",
-        // TODO: https://github.com/KDAB/cxx-qt/issues/36
-        // "u64" => "quint64",
+        "u64" => "::std::uint64_t",
         "usize" => "::std::size_t",
         "i8" => "::std::int8_t",
         "i16" => "::std::int16_t",
         "i32" => "::std::int32_t",
-        // TODO: https://github.com/KDAB/cxx-qt/issues/36
-        // "i64" => "qint64",
+        "i64" => "::std::int64_t",
         "isize" => "::rust::isize",
         "f32" => "float",
         "f64" => "double",

crates/cxx-qt-lib-headers/include/std_types.h

@@ -18,8 +18,10 @@
 static const int i8 = qRegisterMetaType<::std::int8_t>("::std::int8_t");
 static const int i16 = qRegisterMetaType<::std::int16_t>("::std::int16_t");
 static const int i32 = qRegisterMetaType<::std::int32_t>("::std::int32_t");
+static const int i64 = qRegisterMetaType<::std::int64_t>("::std::int64_t");
 
 static const int u8 = qRegisterMetaType<::std::uint8_t>("::std::uint8_t");
 static const int u16 = qRegisterMetaType<::std::uint16_t>("::std::uint16_t");
 static const int u32 = qRegisterMetaType<::std::uint32_t>("::std::uint32_t");
+static const int u64 = qRegisterMetaType<::std::uint64_t>("::std::uint64_t");
 #endif