clang2il.go: Check for desugared types (support clang-19+)

* Closes #116

cmd/genbindings/clang2il.go

@@ -165,6 +165,48 @@ nextTopLevel:
 	return &ret, nil // done
 }
 
+// shouldPreferQualType returns true if we should use the qualType instead of
+// the desugared type based on certain type patterns
+func shouldPreferQualType(qualType string) bool {
+	if strings.Contains(qualType, "intptr") || strings.Contains(qualType, "_t") ||
+		strings.HasPrefix(qualType, "uint") || strings.Contains(qualType, "ushort") ||
+		strings.Contains(qualType, "quint") || strings.Contains(qualType, "qint") ||
+		strings.Contains(qualType, "qptrdiff") || strings.HasPrefix(qualType, "qsize") ||
+		strings.HasPrefix(qualType, "QList<") || strings.HasPrefix(qualType, "QPair<") ||
+		strings.HasPrefix(qualType, "QIntegerForSizeof<") {
+		return true
+	}
+	return false
+}
+
+// getPreferredType returns either the desugared type or qual type based on our rules
+func getPreferredType(node interface{}) string {
+	if node == nil {
+		return ""
+	}
+
+	nodeMap, ok := node.(map[string]interface{})
+	if !ok {
+		return ""
+	}
+
+	var desugared, qualType string
+	if d, ok := nodeMap["desugaredQualType"].(string); ok {
+		desugared = d
+	}
+	if q, ok := nodeMap["qualType"].(string); ok {
+		qualType = q
+	}
+
+	if qualType != "" && shouldPreferQualType(qualType) {
+		return qualType
+	}
+	if desugared != "" {
+		return desugared
+	}
+	return qualType
+}
+
 // processTypedef parses a single C++ typedef into our intermediate format.
 func processTypedef(node map[string]interface{}, addNamePrefix string) (CppTypedef, error) {
 	// Must have a name
@@ -174,7 +216,8 @@ func processTypedef(node map[string]interface{}, addNamePrefix string) (CppTyped
 	}
 
 	if typ, ok := node["type"].(map[string]interface{}); ok {
-		if qualType, ok := typ["qualType"].(string); ok {
+		qualType := getPreferredType(typ)
+		if qualType != "" {
 			return CppTypedef{
 				Alias:          addNamePrefix + nodename,
 				UnderlyingType: parseSingleTypeString(qualType),
@@ -264,7 +307,8 @@ func processClassType(node map[string]interface{}, addNamePrefix string) (CppCla
 			}
 
 			if typ, ok := base["type"].(map[string]interface{}); ok {
-				if qualType, ok := typ["qualType"].(string); ok {
+				qualType := getPreferredType(typ)
+				if qualType != "" {
 					ret.DirectInherits = append(ret.DirectInherits, qualType)
 				}
 			}
@@ -512,8 +556,9 @@ func processEnum(node map[string]interface{}, addNamePrefix string) (CppEnum, er
 	// Underlying type
 	ret.UnderlyingType = parseSingleTypeString("int")
 	if nodefut, ok := node["fixedUnderlyingType"].(map[string]interface{}); ok {
-		if nodequal, ok := nodefut["qualType"].(string); ok {
-			ret.UnderlyingType = parseSingleTypeString(nodequal)
+		qualType := getPreferredType(nodefut)
+		if qualType != "" {
+			ret.UnderlyingType = parseSingleTypeString(qualType)
 		}
 	}
 
@@ -652,11 +697,11 @@ nextEnumEntry:
 func parseMethod(node map[string]interface{}, mm *CppMethod) error {
 
 	if typobj, ok := node["type"].(map[string]interface{}); ok {
-		if qualType, ok := typobj["qualType"].(string); ok {
+		qualType := getPreferredType(typobj)
+		if qualType != "" {
 			// The qualType is the whole type of the method, including its parameter types
 			// If anything here is too complicated, skip the whole method
-
-			var err error = nil
+			var err error
 			mm.ReturnType, mm.Parameters, mm.IsConst, err = parseTypeString(qualType)
 			if err != nil {
 				return err

cmd/genbindings/clang2il_test.go

@@ -14,27 +14,27 @@ func TestParseMethodTypes(t *testing.T) {
 	}
 
 	cases := []testCase{
-		testCase{
+		{
 			input:        "void (bool)",
 			expectReturn: CppParameter{ParameterType: "void"},
 			expectParams: []CppParameter{
-				CppParameter{ParameterType: "bool"},
+				{ParameterType: "bool"},
 			},
 		},
-		testCase{
+		{
 			input:        "bool (QList<QPair<Foo, Bar>>, QString)",
 			expectReturn: CppParameter{ParameterType: "bool"},
 			expectParams: []CppParameter{
-				CppParameter{ParameterType: "QList<QPair<Foo, Bar>>"},
-				CppParameter{ParameterType: "QString"},
+				{ParameterType: "QList<QPair<Foo, Bar>>"},
+				{ParameterType: "QString"},
 			},
 			// expectErr: true,
 		},
-		testCase{
+		{
 			input:        "bool (QList<QWidget*>)",
 			expectReturn: CppParameter{ParameterType: "bool"},
 			expectParams: []CppParameter{
-				CppParameter{ParameterType: "QList<QWidget*>"},
+				{ParameterType: "QList<QWidget*>"},
 			},
 		},
 	}

cmd/genbindings/transformchildclasses_test.go

@@ -9,17 +9,17 @@ func TestChildClassesExtract(t *testing.T) {
 	src := CppParsedHeader{
 		Classes: []CppClass{
 
-			CppClass{
+			{
 				ClassName: "Parent",
 
 				ChildClassdefs: []CppClass{
 
-					CppClass{
+					{
 						ClassName: "Parent::Child",
 
 						ChildClassdefs: []CppClass{
 
-							CppClass{
+							{
 								ClassName: "Parent::Child::Grandchild",
 							},
 						},

cmd/genbindings/transformtypedefs_test.go

@@ -12,11 +12,11 @@ func TestTransformTypedefs(t *testing.T) {
 		return CppParsedHeader{
 			Classes: []CppClass{
 
-				CppClass{
+				{
 					ClassName: "QTestClass",
 					Ctors: []CppMethod{
 
-						CppMethod{
+						{
 							Parameters: []CppParameter{
 								parseSingleTypeString(typeName),
 							},

cmd/genbindings/util.go

@@ -1,9 +1,9 @@
 package main
 
 import (
-	"strconv"
 	"encoding/json"
 	"log"
+	"strconv"
 	"strings"
 )
 
@@ -12,7 +12,7 @@ func maybeSuffix(counter int) string {
 		return ""
 	}
 
-	return strconv.Itoa(counter+1)
+	return strconv.Itoa(counter + 1)
 }
 
 func titleCase(s string) string {
@@ -53,4 +53,4 @@ func slice_copy[T comparable](input []T) []T {
 		ret[i] = elem
 	}
 	return ret
-}
+}