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miqt/cmd/genbindings/emitcabi.go

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package main
import (
"fmt"
"sort"
"strings"
)
func (p CppParameter) RenderTypeCabi() string {
if p.ParameterType == "QString" {
return "struct miqt_string*"
} else if _, ok := p.QListOf(); ok {
return "struct miqt_array*"
} else if _, ok := p.QSetOf(); ok {
return "struct miqt_array*"
} else if (p.Pointer || p.ByRef) && p.QtClassType() {
return cabiClassName(p.ParameterType) + "*"
} else if p.QtClassType() && !p.Pointer {
// Even if C++ returns by value, CABI is returning a heap copy (new'd, not malloc'd)
return cabiClassName(p.ParameterType) + "*"
}
ret := p.ParameterType
switch p.ParameterType {
case "uchar":
ret = "unsigned char"
case "uint":
ret = "unsigned int"
case "ulong":
ret = "unsigned long"
case "qint8":
ret = "int8_t"
case "quint8":
ret = "uint8_t"
case "qint16", "short":
ret = "int16_t"
case "quint16", "ushort", "unsigned short":
ret = "uint16_t"
case "qint32":
ret = "int32_t"
case "quint32":
ret = "uint32_t"
case "qlonglong", "qint64":
ret = "int64_t"
case "qulonglong", "quint64":
ret = "uint64_t"
case "qfloat16":
ret = "_Float16" // No idea where this typedef comes from, but it exists
case "qreal":
ret = "double"
case "qintptr", "QIntegerForSizeof<void *>::Signed":
ret = "intptr_t"
case "quintptr", "uintptr", "QIntegerForSizeof<void *>::Unsigned":
ret = "uintptr_t"
case "qsizetype", "qptrdiff", "QIntegerForSizeof<std::size_t>::Signed":
ret = "ptrdiff_t"
}
if p.Const {
// This is needed for const-correctness for calling some overloads
// e.g. QShortcut ctor taking (QWidget* parent, const char* member) signal -
// the signal/slot requires that member is const, not just plain char*
ret = "const " + ret
}
if ft, ok := p.QFlagsOf(); ok {
if e, ok := KnownEnums[ft.ParameterType]; ok {
ret = e.UnderlyingType.RenderTypeCabi()
} else {
ret = "int"
}
} else if e, ok := KnownEnums[p.ParameterType]; ok {
ret = e.UnderlyingType.RenderTypeCabi()
}
if p.Pointer {
ret += strings.Repeat("*", p.PointerCount)
} else if p.ByRef {
ret += "*"
}
return ret
}
// RenderTypeQtCpp renders the Qt C++ type in the original form from the function
// definition, before any typedefs or transformations were applied.
func (p CppParameter) RenderTypeQtCpp() string {
return p.GetQtCppType().RenderTypeIntermediateCpp()
}
// RenderTypeIntermediateCpp renders the Qt C++ type WITHOUT resolving the
// interior QtCppOriginalType. This is used for intermediate const_cast<>s.
func (p CppParameter) RenderTypeIntermediateCpp() string {
cppType := p.ParameterType
if p.Const {
cppType = "const " + cppType
}
if p.Pointer {
cppType += strings.Repeat("*", p.PointerCount)
}
if p.ByRef {
cppType += "&"
}
return cppType
}
// emitParametersCpp emits the parameter definitions exactly how Qt C++ defines them.
func emitParametersCpp(m CppMethod) string {
tmp := make([]string, 0, len(m.Parameters))
for _, p := range m.Parameters {
tmp = append(tmp, p.RenderTypeQtCpp()+" "+p.ParameterName)
}
return strings.Join(tmp, `, `)
}
func emitParameterTypesCpp(m CppMethod, includeHidden bool) string {
tmp := make([]string, 0, len(m.Parameters))
for _, p := range m.Parameters {
tmp = append(tmp, p.RenderTypeQtCpp())
}
if includeHidden {
for _, p := range m.HiddenParams {
tmp = append(tmp, p.RenderTypeQtCpp())
}
}
return strings.Join(tmp, `, `)
}
func emitParametersCabi(m CppMethod, selfType string) string {
tmp := make([]string, 0, len(m.Parameters)+1)
if !m.IsStatic && selfType != "" {
tmp = append(tmp, selfType+" self")
}
for _, p := range m.Parameters {
if p.ParameterType == "QString" {
tmp = append(tmp, "struct miqt_string* "+p.ParameterName)
} else if t, ok := p.QListOf(); ok {
tmp = append(tmp, "struct miqt_array* /* of "+t.RenderTypeCabi()+" */ "+p.ParameterName)
} else if t, ok := p.QSetOf(); ok {
tmp = append(tmp, "struct miqt_array* /* Set of "+t.RenderTypeCabi()+" */ "+p.ParameterName)
} else if p.QtClassType() {
if p.ByRef || p.Pointer {
// Pointer to Qt type
// Replace with taking our PQ typedef by value
tmp = append(tmp, cabiClassName(p.ParameterType)+"* "+p.ParameterName)
} else {
// Qt type passed by value
// The CABI will unconditionally take these by pointer and dereference them
// when passing to C++
tmp = append(tmp, cabiClassName(p.ParameterType)+"* "+p.ParameterName)
}
} else {
// RenderTypeCabi renders both pointer+reference as pointers
tmp = append(tmp, p.RenderTypeCabi()+" "+p.ParameterName)
}
}
return strings.Join(tmp, ", ")
}
func emitParametersCABI2CppForwarding(params []CppParameter, indent string) (preamble string, forwarding string) {
tmp := make([]string, 0, len(params)+1)
for _, p := range params {
addPre, addFwd := emitCABI2CppForwarding(p, indent)
preamble += addPre
tmp = append(tmp, addFwd)
}
return preamble, strings.Join(tmp, ", ")
}
func makeNamePrefix(in string) string {
return strings.Replace(strings.Replace(in, `[`, `_`, -1), `]`, "", -1)
}
func emitCABI2CppForwarding(p CppParameter, indent string) (preamble string, forwarding string) {
nameprefix := makeNamePrefix(p.ParameterName)
if p.ParameterType == "QString" {
// The CABI has accepted two parameters - need to convert to one real QString
// Create it on the stack
preamble += indent + "QString " + nameprefix + "_QString = QString::fromUtf8(&" + p.ParameterName + "->data, " + p.ParameterName + "->len);\n"
return preamble, nameprefix + "_QString"
} else if listType, ok := p.QListOf(); ok {
preamble += indent + p.ParameterType + " " + nameprefix + "_QList;\n"
preamble += indent + nameprefix + "_QList.reserve(" + p.ParameterName + "->len);\n"
preamble += indent + listType.RenderTypeCabi() + "* " + nameprefix + "_arr = static_cast<" + listType.RenderTypeCabi() + "*>(" + p.ParameterName + "->data);\n"
preamble += indent + "for(size_t i = 0; i < " + p.ParameterName + "->len; ++i) {\n"
listType.ParameterName = nameprefix + "_arr[i]"
addPre, addFwd := emitCABI2CppForwarding(listType, indent+"\t")
preamble += addPre
preamble += indent + "\t" + nameprefix + "_QList.push_back(" + addFwd + ");\n"
preamble += indent + "}\n"
return preamble, nameprefix + "_QList"
} else if p.IsFlagType() || p.IntType() || p.IsKnownEnum() {
castSrc := p.ParameterName
castType := p.RenderTypeQtCpp()
if p.ByRef { // e.g. QDataStream::operator>>() overloads
castSrc = "*" + castSrc
}
if p.QtCppOriginalType != nil && p.QtCppOriginalType.Const != p.Const {
return preamble, "static_cast<" + p.RenderTypeQtCpp() + ">(const_cast<" + p.RenderTypeIntermediateCpp() + ">(" + p.ParameterName + "))"
}
if p.ParameterType == "qint64" ||
p.ParameterType == "quint64" ||
p.ParameterType == "qlonglong" ||
p.ParameterType == "qulonglong" ||
p.ParameterType == "qint8" {
// QDataStream::operator>>() by reference (qint64)
// QLockFile::getLockInfo() by pointer
// QTextStream::operator>>() by reference (qlonglong + qulonglong)
// QDataStream::operator>>() qint8
// CABI has these as int64_t* (long int) which fails a static_cast to qint64& (long long int&)
// Hack a hard C-style cast
return preamble, "(" + castType + ")(" + castSrc + ")"
} else {
// Use static_cast<> safely
return preamble, "static_cast<" + castType + ">(" + castSrc + ")"
}
} else if _, ok := p.QSetOf(); ok {
panic("QSet<> arguments are not yet implemented") // n.b. doesn't seem to exist in QtCore/QtGui/QtWidgets at all
} else if p.ByRef {
if p.Pointer {
// By ref and by pointer
// This happens for QDataStream &QDataStream::operator>>(char *&s)
// We are only using one level of indirection
return preamble, p.ParameterName
} else {
// By ref and not by pointer
// We changed RenderTypeCabi() to render this as a pointer
// Need to dereference so we can pass as reference to the actual Qt C++ function
//tmp = append(tmp, "*"+p.ParameterName)
return preamble, "*" + p.ParameterName
}
} else if p.QtClassType() && !p.Pointer {
// CABI takes all Qt types by pointer, even if C++ wants them by value
// Dereference the passed-in pointer
if strings.Contains(p.ParameterName, `[`) {
return preamble, "*(" + p.ParameterName + ")" // Extra brackets aren't necessary, just nice
}
return preamble, "*" + p.ParameterName
} else {
return preamble, p.ParameterName
}
}
// emitAssignCppToCabi transforms and assigns rvalue to the assignExpression.
// Sample assignExpression: `return `, `auto foo = `
// Sample rvalue: `foo`, `foo(xyz)`
// The return is a complete statement including trailing newline.
func emitAssignCppToCabi(assignExpression string, p CppParameter, rvalue string) string {
shouldReturn := assignExpression // n.b. already has indent
afterCall := ""
assignExpression = strings.TrimLeft(assignExpression, " \t")
indent := shouldReturn[0 : len(shouldReturn)-len(assignExpression)]
shouldReturn = shouldReturn[len(indent):]
namePrefix := makeNamePrefix(p.ParameterName)
if p.ParameterType == "void" && !p.Pointer {
shouldReturn = ""
} else if p.ParameterType == "QString" {
if p.Pointer {
// e.g. QTextStream::String()
// These are rare, and probably expected to be lightweight references
// But, a copy is the best we can project it as
// Un-pointer-ify
shouldReturn = ifv(p.Const, "const ", "") + "QString* " + namePrefix + "_ret = "
afterCall = indent + "// Convert QString pointer from UTF-16 in C++ RAII memory to UTF-8 in manually-managed C memory\n"
afterCall += indent + "QByteArray " + namePrefix + "_b = " + namePrefix + "_ret->toUtf8();\n"
} else {
shouldReturn = ifv(p.Const, "const ", "") + "QString " + p.ParameterName + "_ret = "
afterCall = indent + "// Convert QString from UTF-16 in C++ RAII memory to UTF-8 in manually-managed C memory\n"
afterCall += indent + "QByteArray " + namePrefix + "_b = " + namePrefix + "_ret.toUtf8();\n"
}
afterCall += indent + assignExpression + "miqt_strdup(" + namePrefix + "_b.data(), " + namePrefix + "_b.length());\n"
} else if t, ok := p.QListOf(); ok {
// In some cases rvalue is a function call and the temporary
// is necessary; in some cases it's a literal and the temporary is
// elided; but in some cases it's a Qt class and the temporary goes
// through a copy constructor
// TODO Detect safe cases where this can be optimized
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
afterCall += indent + "// Convert QList<> from C++ memory to manually-managed C memory\n"
afterCall += indent + "" + t.RenderTypeCabi() + "* " + namePrefix + "_arr = static_cast<" + t.RenderTypeCabi() + "*>(malloc(sizeof(" + t.RenderTypeCabi() + ") * " + namePrefix + "_ret.length()));\n"
afterCall += indent + "for (size_t i = 0, e = " + namePrefix + "_ret.length(); i < e; ++i) {\n"
afterCall += emitAssignCppToCabi(indent+"\t"+namePrefix+"_arr[i] = ", t, namePrefix+"_ret[i]")
afterCall += indent + "}\n"
afterCall += indent + "struct miqt_array* " + namePrefix + "_out = static_cast<struct miqt_array*>(malloc(sizeof(struct miqt_array)));\n"
afterCall += indent + "" + namePrefix + "_out->len = " + namePrefix + "_ret.length();\n"
afterCall += indent + "" + namePrefix + "_out->data = static_cast<void*>(" + namePrefix + "_arr);\n"
afterCall += indent + assignExpression + "" + namePrefix + "_out;\n"
} else if t, ok := p.QSetOf(); ok {
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
afterCall += indent + "// Convert QList<> from C++ memory to manually-managed C memory\n"
afterCall += indent + "" + t.RenderTypeCabi() + "* " + namePrefix + "_arr = static_cast<" + t.RenderTypeCabi() + "*>(malloc(sizeof(" + t.RenderTypeCabi() + ") * " + namePrefix + "_ret.size()));\n"
afterCall += indent + "int " + namePrefix + "_ctr = 0;\n"
afterCall += indent + "QSetIterator<" + t.RenderTypeQtCpp() + "> " + namePrefix + "_itr(" + namePrefix + "_ret);\n"
afterCall += indent + "while (" + namePrefix + "_itr.hasNext()) {\n"
afterCall += emitAssignCppToCabi(indent+"\t"+namePrefix+"_arr["+namePrefix+"_ctr++] = ", t, namePrefix+"_itr.next()")
afterCall += indent + "}\n"
afterCall += indent + "struct miqt_array* " + namePrefix + "_out = static_cast<struct miqt_array*>(malloc(sizeof(struct miqt_array)));\n"
afterCall += indent + "" + namePrefix + "_out->len = " + namePrefix + "_ret.size();\n"
afterCall += indent + "" + namePrefix + "_out->data = static_cast<void*>(" + namePrefix + "_arr);\n"
afterCall += indent + assignExpression + "" + namePrefix + "_out;\n"
} else if p.QtClassType() && p.ByRef {
// It's a pointer in disguise, just needs one cast
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
afterCall += indent + "// Cast returned reference into pointer\n"
if p.Const {
nonConst := p // copy
nonConst.Const = false
nonConst.ByRef = false
nonConst.Pointer = true
nonConst.PointerCount = 1
afterCall += indent + "" + assignExpression + "const_cast<" + nonConst.RenderTypeQtCpp() + ">(&" + namePrefix + "_ret);\n"
} else {
afterCall += indent + "" + assignExpression + "&" + namePrefix + "_ret;\n"
}
} else if p.QtClassType() && !p.Pointer {
// Elide temporary and emit directly from the rvalue
return indent + assignExpression + "new " + p.ParameterType + "(" + rvalue + ");\n"
} else if p.IsFlagType() || p.IsKnownEnum() || p.QtCppOriginalType != nil {
// Needs an explicit cast
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
if p.QtCppOriginalType != nil && p.QtCppOriginalType.Const != p.Const {
afterCall += indent + "" + assignExpression + "const_cast<" + p.RenderTypeCabi() + ">(static_cast<" + p.RenderTypeIntermediateCpp() + ">(" + namePrefix + "_ret));\n"
} else {
afterCall += indent + "" + assignExpression + "static_cast<" + p.RenderTypeCabi() + ">(" + namePrefix + "_ret);\n"
}
} else if p.Const {
shouldReturn += "(" + p.RenderTypeCabi() + ") "
}
return indent + shouldReturn + rvalue + ";\n" + afterCall
}
// getReferencedTypes finds all referenced Qt types in this file.
func getReferencedTypes(src *CppParsedHeader) []string {
foundTypes := map[string]struct{}{}
for _, c := range src.Classes {
foundTypes[c.ClassName] = struct{}{}
for _, ctor := range c.Ctors {
for _, p := range ctor.Parameters {
if p.QtClassType() {
foundTypes[p.ParameterType] = struct{}{}
}
if t, ok := p.QListOf(); ok {
foundTypes["QList"] = struct{}{} // FIXME or QVector?
if t.QtClassType() {
foundTypes[t.ParameterType] = struct{}{}
}
}
}
}
for _, m := range c.Methods {
for _, p := range m.Parameters {
if p.QtClassType() {
foundTypes[p.ParameterType] = struct{}{}
}
if t, ok := p.QListOf(); ok {
foundTypes["QList"] = struct{}{} // FIXME or QVector?
if t.QtClassType() {
foundTypes[t.ParameterType] = struct{}{}
}
}
}
if m.ReturnType.QtClassType() {
foundTypes[m.ReturnType.ParameterType] = struct{}{}
}
if t, ok := m.ReturnType.QListOf(); ok {
foundTypes["QList"] = struct{}{} // FIXME or QVector?
if t.QtClassType() {
foundTypes[t.ParameterType] = struct{}{}
}
}
}
}
// Some types (e.g. QRgb) are found but are typedefs, not classes
for _, td := range src.Typedefs {
delete(foundTypes, td.Alias)
}
// Convert to sorted list
foundTypesList := make([]string, 0, len(foundTypes))
for ft := range foundTypes {
if strings.HasPrefix(ft, "QList<") || strings.HasPrefix(ft, "QVector<") {
continue
}
if strings.HasSuffix(ft, "Private") { // qbrush.h finds QGradientPrivate
continue
}
foundTypesList = append(foundTypesList, ft)
}
sort.Strings(foundTypesList)
return foundTypesList
}
// cabiClassName returns the Go / CABI class name for a Qt C++ class.
// Normally this is the same, except for class types that are nested inside another class definition.
func cabiClassName(className string) string {
// Many types are defined in qnamespace.h under Qt::
// The Go implementation is always called qt.Foo, and these names don't
// collide with anything, so strip the redundant prefix
className = strings.TrimPrefix(className, `Qt::`)
// Must use __ to avoid subclass/method name collision e.g. QPagedPaintDevice::Margins
return strings.Replace(className, `::`, `__`, -1)
}
func emitBindingHeader(src *CppParsedHeader, filename string) (string, error) {
ret := strings.Builder{}
includeGuard := "GEN_" + strings.ToUpper(strings.Replace(filename, `.`, `_`, -1))
ret.WriteString(`#ifndef ` + includeGuard + `
#define ` + includeGuard + `
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#include "binding.h"
#ifdef __cplusplus
extern "C" {
#endif
`)
foundTypesList := getReferencedTypes(src)
ret.WriteString("#ifdef __cplusplus\n")
for _, ft := range foundTypesList {
if ft == "QList" || ft == "QString" { // These types are reprojected
continue
}
if strings.Contains(ft, `::`) {
// Forward declarations of inner classes are not yet supported in C++
// @ref https://stackoverflow.com/q/1021793
ret.WriteString(`#if defined(WORKAROUND_INNER_CLASS_DEFINITION_` + cabiClassName(ft) + ")\n")
ret.WriteString(`typedef ` + ft + " " + cabiClassName(ft) + ";\n")
ret.WriteString("#else\n")
ret.WriteString(`class ` + cabiClassName(ft) + ";\n")
ret.WriteString("#endif\n")
} else {
ret.WriteString(`class ` + ft + ";\n")
}
}
ret.WriteString("#else\n")
for _, ft := range foundTypesList {
if ft == "QList" || ft == "QString" { // These types are reprojected
continue
}
ret.WriteString(`typedef struct ` + cabiClassName(ft) + " " + cabiClassName(ft) + ";\n")
}
ret.WriteString("#endif\n")
ret.WriteString("\n")
for _, c := range src.Classes {
cClassName := cabiClassName(c.ClassName)
for i, ctor := range c.Ctors {
ret.WriteString(fmt.Sprintf("%s %s_new%s(%s);\n", cClassName+"*", cClassName, maybeSuffix(i), emitParametersCabi(ctor, "")))
}
for _, m := range c.Methods {
ret.WriteString(fmt.Sprintf("%s %s_%s(%s);\n", m.ReturnType.RenderTypeCabi(), cClassName, m.SafeMethodName(), emitParametersCabi(m, ifv(m.IsConst, "const ", "")+cClassName+"*")))
if m.IsSignal {
ret.WriteString(fmt.Sprintf("%s %s_connect_%s(%s* self, void* slot);\n", m.ReturnType.RenderTypeCabi(), cClassName, m.SafeMethodName(), cClassName))
}
}
// delete
if c.CanDelete {
ret.WriteString(fmt.Sprintf("void %s_Delete(%s* self);\n", cClassName, cClassName))
}
ret.WriteString("\n")
}
ret.WriteString(
`#ifdef __cplusplus
} /* extern C */
#endif
#endif
`)
return ret.String(), nil
}
func emitBindingCpp(src *CppParsedHeader, filename string) (string, error) {
ret := strings.Builder{}
for _, ref := range getReferencedTypes(src) {
if !ImportHeaderForClass(ref) {
continue
}
if ref == "QString" {
ret.WriteString("#include <QString>\n")
ret.WriteString("#include <QByteArray>\n")
ret.WriteString("#include <cstring>\n")
continue
}
if strings.Contains(ref, `::`) {
ret.WriteString(`#define WORKAROUND_INNER_CLASS_DEFINITION_` + cabiClassName(ref) + "\n")
continue
}
ret.WriteString(`#include <` + ref + ">\n")
}
ret.WriteString(`#include "` + filename + "\"\n")
ret.WriteString(`#include "gen_` + filename + "\"\n")
ret.WriteString("#include \"_cgo_export.h\"\n\n")
for _, c := range src.Classes {
cClassName := cabiClassName(c.ClassName)
for i, ctor := range c.Ctors {
preamble, forwarding := emitParametersCABI2CppForwarding(ctor.Parameters, "\t")
if ctor.LinuxOnly {
ret.WriteString(fmt.Sprintf(
"%s* %s_new%s(%s) {\n"+
"#ifdef Q_OS_LINUX\n"+
"%s"+
"\treturn new %s(%s);\n"+
"#else\n"+
"\treturn nullptr;\n"+
"#endif\n"+
"}\n"+
"\n",
cClassName, cClassName, maybeSuffix(i), emitParametersCabi(ctor, ""),
preamble,
c.ClassName, forwarding,
))
} else {
ret.WriteString(fmt.Sprintf(
"%s* %s_new%s(%s) {\n"+
"%s"+
"\treturn new %s(%s);\n"+
"}\n"+
"\n",
cClassName, cClassName, maybeSuffix(i), emitParametersCabi(ctor, ""),
preamble,
c.ClassName, forwarding,
))
}
}
for _, m := range c.Methods {
// Need to take an extra 'self' parameter
preamble, forwarding := emitParametersCABI2CppForwarding(m.Parameters, "\t")
// callTarget is an rvalue representing the full C++ function call.
callTarget := "self->"
if m.IsStatic {
callTarget = c.ClassName + "::"
}
callTarget += m.CppCallTarget() + "(" + forwarding + ")"
if m.LinuxOnly {
ret.WriteString(fmt.Sprintf(
"%s %s_%s(%s) {\n"+
"#ifdef Q_OS_LINUX\n"+
"%s"+
"%s"+
"#else\n"+
"\t%s _ret_invalidOS;\n"+
"\treturn _ret_invalidOS;\n"+
"#endif\n"+
"}\n"+
"\n",
m.ReturnType.RenderTypeCabi(), cClassName, m.SafeMethodName(), emitParametersCabi(m, ifv(m.IsConst, "const ", "")+cClassName+"*"),
preamble,
emitAssignCppToCabi("\treturn ", m.ReturnType, callTarget),
m.ReturnType.RenderTypeCabi(),
))
} else {
ret.WriteString(fmt.Sprintf(
"%s %s_%s(%s) {\n"+
"%s"+
"%s"+
"}\n"+
"\n",
m.ReturnType.RenderTypeCabi(), cClassName, m.SafeMethodName(), emitParametersCabi(m, ifv(m.IsConst, "const ", "")+cClassName+"*"),
preamble,
emitAssignCppToCabi("\treturn ", m.ReturnType, callTarget),
))
}
if m.IsSignal {
bindingFunc := "miqt_exec_callback_" + cabiClassName(c.ClassName) + "_" + m.SafeMethodName()
// If there are hidden parameters, the type of the signal itself
// needs to include them
exactSignal := `static_cast<void (` + c.ClassName + `::*)(` + emitParameterTypesCpp(m, true) + `)` + ifv(m.IsConst, ` const`, ``) + `>(&` + c.ClassName + `::` + m.CppCallTarget() + `)`
paramArgs := []string{"slot"}
paramArgDefs := []string{"void* cb"}
var signalCode string
for i, p := range m.Parameters {
signalCode += emitAssignCppToCabi(fmt.Sprintf("\t\t%s sigval%d = ", p.RenderTypeCabi(), i+1), p, p.ParameterName)
paramArgs = append(paramArgs, fmt.Sprintf("sigval%d", i+1))
paramArgDefs = append(paramArgDefs, p.RenderTypeCabi()+" "+p.ParameterName)
}
signalCode += "\t\t" + bindingFunc + "(" + strings.Join(paramArgs, `, `) + ");\n"
ret.WriteString(
`void ` + cClassName + `_connect_` + m.SafeMethodName() + `(` + cClassName + `* self, void* slot) {` + "\n" +
"\t" + c.ClassName + `::connect(self, ` + exactSignal + `, self, [=](` + emitParametersCpp(m) + `) {` + "\n" +
signalCode +
"\t});\n" +
"}\n" +
"\n",
)
}
}
// Delete
if c.CanDelete {
ret.WriteString(fmt.Sprintf(
"void %s_Delete(%s* self) {\n"+
"\tdelete self;\n"+
"}\n"+
"\n",
cClassName, cClassName,
))
}
}
return ret.String(), nil
}
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