Adds a workaround and test for MAKEINTRESOURCE style constants

.github/workflows/build.yml

@@ -173,6 +173,7 @@ jobs:
           cargo clippy -p test_not_dll &&
           cargo clippy -p test_properties &&
           cargo clippy -p test_query_signature &&
+          cargo clippy -p test_resources &&
           cargo clippy -p test_return_struct &&
           cargo clippy -p test_string_param &&
           cargo clippy -p test_structs &&

.github/workflows/test.yml

@@ -157,6 +157,7 @@ jobs:
           cargo test --target ${{ matrix.target }} -p test_not_dll &&
           cargo test --target ${{ matrix.target }} -p test_properties &&
           cargo test --target ${{ matrix.target }} -p test_query_signature &&
+          cargo test --target ${{ matrix.target }} -p test_resources &&
           cargo test --target ${{ matrix.target }} -p test_return_struct &&
           cargo test --target ${{ matrix.target }} -p test_string_param &&
           cargo test --target ${{ matrix.target }} -p test_structs &&

crates/libs/bindgen/src/constants.rs

@@ -8,7 +8,9 @@ pub fn gen(gen: &Gen, def: Field) -> TokenStream {
     let features = gen.cfg_features(&cfg);
 
     if let Some(constant) = gen.reader.field_constant(def) {
-        if ty == gen.reader.constant_type(constant) {
+        let constant_type = gen.reader.constant_type(constant);
+
+        if ty == constant_type {
             let value = gen.typed_value(&gen.reader.constant_value(constant));
             quote! {
                 #doc
@@ -19,8 +21,11 @@ pub fn gen(gen: &Gen, def: Field) -> TokenStream {
             let kind = gen.type_default_name(&ty);
             let value = gen.value(&gen.reader.constant_value(constant));
 
-            let value = if gen.reader.type_underlying_type(&ty) == gen.reader.constant_type(constant) {
+            let value = if gen.reader.type_underlying_type(&ty) == constant_type {
                 value
+            // TODO: workaround for https://github.com/microsoft/win32metadata/issues/1029
+            } else if ty == Type::PCWSTR && value.0.starts_with('-') {
+                quote! { #value as u16 as _ }
             } else {
                 quote! { #value as _ }
             };

crates/libs/sys/src/Windows/Win32/UI/Controls/mod.rs

@@ -3604,13 +3604,13 @@ pub const TCS_TOOLTIPS: u32 = 16384u32;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
 pub const TCS_VERTICAL: u32 = 128u32;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_ERROR_ICON: ::windows_sys::core::PCWSTR = -2i32 as _;
+pub const TD_ERROR_ICON: ::windows_sys::core::PCWSTR = -2i32 as u16 as _;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_INFORMATION_ICON: ::windows_sys::core::PCWSTR = -3i32 as _;
+pub const TD_INFORMATION_ICON: ::windows_sys::core::PCWSTR = -3i32 as u16 as _;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_SHIELD_ICON: ::windows_sys::core::PCWSTR = -4i32 as _;
+pub const TD_SHIELD_ICON: ::windows_sys::core::PCWSTR = -4i32 as u16 as _;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_WARNING_ICON: ::windows_sys::core::PCWSTR = -1i32 as _;
+pub const TD_WARNING_ICON: ::windows_sys::core::PCWSTR = -1i32 as u16 as _;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
 pub const TMTVS_RESERVEDHIGH: u32 = 19999u32;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]

crates/libs/windows/src/Windows/Win32/UI/Controls/mod.rs

@@ -6232,13 +6232,13 @@ pub const TCS_TOOLTIPS: u32 = 16384u32;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
 pub const TCS_VERTICAL: u32 = 128u32;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_ERROR_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-2i32 as _);
+pub const TD_ERROR_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-2i32 as u16 as _);
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_INFORMATION_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-3i32 as _);
+pub const TD_INFORMATION_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-3i32 as u16 as _);
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_SHIELD_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-4i32 as _);
+pub const TD_SHIELD_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-4i32 as u16 as _);
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
-pub const TD_WARNING_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-1i32 as _);
+pub const TD_WARNING_ICON: ::windows::core::PCWSTR = ::windows::core::PCWSTR(-1i32 as u16 as _);
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]
 pub const TMTVS_RESERVEDHIGH: u32 = 19999u32;
 #[doc = "*Required features: `\"Win32_UI_Controls\"`*"]

crates/tests/resources/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "test_resources"
+version = "0.0.0"
+authors = ["Microsoft"]
+edition = "2018"
+
+[dependencies.windows]
+path = "../../libs/windows"
+features = [
+    "Win32_Foundation",
+    "Win32_UI_Controls",
+    "Win32_UI_WindowsAndMessaging",
+]
+
+[dependencies.windows-sys]
+path = "../../libs/sys"
+features = [
+    "Win32_Foundation",
+    "Win32_UI_Controls",
+    "Win32_UI_WindowsAndMessaging",
+]

crates/tests/resources/src/lib.rs

@@ -0,0 +1 @@
+

crates/tests/resources/tests/sys.rs

@@ -0,0 +1,16 @@
+use windows_sys::{Win32::Foundation::*, Win32::UI::Controls::*, Win32::UI::WindowsAndMessaging::*};
+
+/// These tests ensure `MAKEINTRESOURCEW` style constants an in particular negative constants like TD_ERROR_ICON
+/// work as expected.
+#[test]
+fn sys() {
+    unsafe {
+        assert_eq!(IDI_APPLICATION as u16, 32512);
+        assert_ne!(LoadIconW(0, IDI_APPLICATION), 0);
+        assert_eq!(GetLastError(), 0);
+
+        assert_eq!(TD_ERROR_ICON as i16, -2);
+        assert_eq!(LoadIconW(0, TD_ERROR_ICON), 0);
+        assert_eq!(GetLastError(), ERROR_RESOURCE_TYPE_NOT_FOUND);
+    }
+}

crates/tests/resources/tests/win.rs

@@ -0,0 +1,16 @@
+use windows::{core::*, Win32::Foundation::*, Win32::UI::Controls::*, Win32::UI::WindowsAndMessaging::*};
+
+/// These tests ensure `MAKEINTRESOURCEW` style constants an in particular negative constants like TD_ERROR_ICON
+/// work as expected.
+#[test]
+fn win() -> Result<()> {
+    unsafe {
+        assert_eq!(IDI_APPLICATION.0 as u16, 32512);
+        LoadIconW(HINSTANCE::default(), IDI_APPLICATION)?;
+
+        assert_eq!(TD_ERROR_ICON.0 as i16, -2);
+        assert_eq!(LoadIconW(HINSTANCE::default(), TD_ERROR_ICON).unwrap_err().code(), ERROR_RESOURCE_TYPE_NOT_FOUND.into());
+
+        Ok(())
+    }
+}