genbindings: use knownClassNames tracker to distinguish A::B names

cmd/genbindings/emitcabi.go

@@ -46,7 +46,13 @@ func (p CppParameter) RenderTypeCabi() string {
 	}
 
 	if strings.Contains(p.ParameterType, `::`) {
-		ret = "int"
+		if _, ok := KnownClassnames[p.ParameterType]; ok {
+			// Inner class
+			ret = cabiClassName(p.ParameterType)
+		} else {
+			// Enum
+			ret = "uintptr_t"
+		}
 	}
 
 	if p.Pointer || p.ByRef {
@@ -64,11 +70,11 @@ func emitReturnTypeCabi(p CppParameter) string {
 		return "void" // Will be handled separately
 
 	} else if (p.Pointer || p.ByRef) && p.QtClassType() {
-		return p.ParameterType + "*" // CABI type
+		return cabiClassName(p.ParameterType) + "*" // CABI type
 
 	} else if p.QtClassType() && !p.Pointer {
 		// Even if C++ returns by value, CABI is returning a heap copy (new'd, not malloc'd)
-		return p.ParameterType + "*" // CABI type
+		return cabiClassName(p.ParameterType) + "*" // CABI type
 		// return "void" // Handled separately with an _out pointer
 
 	} else {
@@ -77,10 +83,8 @@ func emitReturnTypeCabi(p CppParameter) string {
 }
 
 func (p CppParameter) RenderTypeQtCpp() string {
-	cppType := p.ParameterType
+	cppType := p.UnderlyingType()
-	if len(p.TypeAlias) > 0 {
+
-		cppType = p.TypeAlias // replace
-	}
 	if p.Const {
 		cppType = "const " + cppType
 	}
@@ -147,13 +151,13 @@ func emitParametersCabi(m CppMethod, selfType string) string {
 		} else if (p.ByRef || p.Pointer) && p.QtClassType() {
 			// Pointer to Qt type
 			// Replace with taking our PQ typedef by value
-			tmp = append(tmp, p.ParameterType+"* "+p.ParameterName)
+			tmp = append(tmp, cabiClassName(p.ParameterType)+"* "+p.ParameterName)
 
 		} else if p.QtClassType() {
 			// Qt type passed by value
 			// The CABI will unconditionally take these by pointer and dereference them
 			// when passing to C++
-			tmp = append(tmp, p.ParameterType+"* "+p.ParameterName)
+			tmp = append(tmp, cabiClassName(p.ParameterType)+"* "+p.ParameterName)
 
 		} else {
 			// RenderTypeCabi renders both pointer+reference as pointers
@@ -235,13 +239,9 @@ func emitParametersCABI2CppForwarding(params []CppParameter) (preamble string, f
 			// Use the raw ParameterType to select an explicit integer overload
 			// Don't use RenderTypeCabi() since it canonicalizes some int types for CABI
 			castSrc := p.ParameterName
-			castType := p.ParameterType
+			castType := p.RenderTypeQtCpp()
-			if p.Pointer {
-				castType += "*"
-			}
 			if p.ByRef { // e.g. QDataStream::operator>>() overloads
 				castSrc = "*" + castSrc
-				castType += "&" // believe it or not, this is legal
 			}
 
 			if p.ParameterType == "qint64" || p.ParameterType == "quint64" || p.ParameterType == "qlonglong" || p.ParameterType == "qulonglong" {

cmd/genbindings/emitgo.go

@@ -88,7 +88,13 @@ func (p CppParameter) RenderTypeGo() string {
 	default:
 
 		if strings.Contains(p.ParameterType, `::`) {
-			ret += "int"
+			if _, ok := KnownClassnames[p.ParameterType]; ok {
+				// Inner class
+				ret += cabiClassName(p.ParameterType)
+			} else {
+				// Enum
+				ret += "uintptr"
+			}
 		} else {
 			// Do not transform this type
 			ret += p.ParameterType
@@ -314,7 +320,7 @@ import "C"
 		localInit := "h: h"
 		for _, base := range c.Inherits {
 			gfs.imports["unsafe"] = struct{}{}
-			localInit += ", " + base + ": new" + base + "_U(unsafe.Pointer(h))"
+			localInit += ", " + base + ": new" + cabiClassName(base) + "_U(unsafe.Pointer(h))"
 		}
 
 		ret.WriteString(`
@@ -419,9 +425,9 @@ import "C"
 					if t.QtClassType() {
 						if !t.Pointer {
 							// new, but then dereference it
-							afterword += "ret[i] = *new" + t.ParameterType + "(_outCast[i])\n"
+							afterword += "ret[i] = *new" + cabiClassName(t.ParameterType) + "(_outCast[i])\n"
 						} else {
-							afterword += "ret[i] = new" + t.ParameterType + "(_outCast[i])\n"
+							afterword += "ret[i] = new" + cabiClassName(t.ParameterType) + "(_outCast[i])\n"
 						}
 					} else { // plain int type
 						afterword += "ret[i] = (" + t.RenderTypeGo() + ")(_outCast[i])\n"
@@ -437,7 +443,7 @@ import "C"
 
 				if m.ReturnType.Pointer || m.ReturnType.ByRef {
 					gfs.imports["unsafe"] = struct{}{}
-					afterword = "return new" + m.ReturnType.ParameterType + "_U(unsafe.Pointer(ret))"
+					afterword = "return new" + cabiClassName(m.ReturnType.ParameterType) + "_U(unsafe.Pointer(ret))"
 
 				} else {
 					// This is return by value, but CABI has new'd it into a
@@ -449,8 +455,8 @@ import "C"
 
 					gfs.imports["runtime"] = struct{}{}
 					afterword = "// Qt uses pass-by-value semantics for this type. Mimic with finalizer\n"
-					afterword += "ret1 := new" + m.ReturnType.ParameterType + "(ret)\n"
+					afterword += "ret1 := new" + cabiClassName(m.ReturnType.ParameterType) + "(ret)\n"
-					afterword += "runtime.SetFinalizer(ret1, func(ret2 *" + m.ReturnType.ParameterType + ") {\n"
+					afterword += "runtime.SetFinalizer(ret1, func(ret2 *" + cabiClassName(m.ReturnType.ParameterType) + ") {\n"
 					afterword += "ret2.Delete()\n"
 					afterword += "runtime.KeepAlive(ret2.h)\n"
 					afterword += "})\n"

cmd/genbindings/intermediate.go

@@ -5,6 +5,14 @@ import (
 	"strings"
 )
 
+var (
+	KnownClassnames map[string]struct{} // Entries of the form QFoo::Bar if it is an inner class
+)
+
+func init() {
+	KnownClassnames = make(map[string]struct{})
+}
+
 type CppParameter struct {
 	ParameterName string
 	ParameterType string
@@ -15,8 +23,30 @@ type CppParameter struct {
 	Optional      bool
 }
 
+func (p *CppParameter) UnderlyingType() string {
+	if p.TypeAlias != "" {
+		return p.TypeAlias
+	}
+
+	return p.ParameterType
+}
+
 func (p CppParameter) QtClassType() bool {
-	return (p.ParameterType[0] == 'Q') && p.ParameterType != "QRgb" && !strings.Contains(p.ParameterType, `::`)
+	if p.ParameterType[0] != 'Q' {
+		return false
+	}
+
+	if strings.Contains(p.ParameterType, `::`) {
+		// Maybe if it's an inner class
+		if _, ok := KnownClassnames[p.ParameterType]; ok {
+			return true
+		}
+		// Int type
+		return false
+	}
+
+	// Passed all conditions
+	return true
 }
 
 func (p CppParameter) QListOf() (CppParameter, bool) {

cmd/genbindings/main.go

@@ -136,6 +136,11 @@ func main() {
 		astTransformOptional(parsed)
 		astTransformOverloads(parsed)
 
+		// Update global state tracker (AFTER astTransformChildClasses)
+		// Currently, this is only used for inner classes
+		for _, c := range parsed.Classes {
+			KnownClassnames[c.ClassName] = struct{}{}
+		}
 		processHeaders = append(processHeaders, parsed)
 	}