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genbindings: workaround clang access to protected enums from friend funcs

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This commit is contained in:
mappu 2025-02-08 11:48:25 +13:00
parent d63facdcda
commit f045d87bf5
1 changed files with 25 additions and 1 deletions
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26
cmd/genbindings/emitcabi.go
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@ -1358,6 +1358,30 @@ extern "C" {
vbpreamble, vbforwarding := emitParametersCABI2CppForwarding(m.Parameters, "\t\t")
vbCallTarget := "self_cast->" + m.CppCallTarget() + "(" + vbforwarding + ")"
assignStmts := emitAssignCppToCabi("\treturn ", m.ReturnType, vbCallTarget)
// FIXME(hack): In some platforms, instantiating a protected
// enum fails in friend context:
//
// QAbstractItemView::State _ret = self_cast->state();
// error: 'State' is a protected member of 'QAbstractItemView'
//
// @ref https://stackoverflow.com/q/52191903
// However, it works fine on most other platforms. Probably this
// is a GCC vs Clang difference.
//
// Work around it for this specific class (fingers-crossed) by
// referencing the protected enum via its subclass name
assignStmts = strings.Replace(assignStmts, c.ClassName+`::`, cppSubclassName(c)+`::`, -1)
// Also need to scan parent classes (e.g. QColumnView friend
// functions refer to its parent QAbstractItemView::State)
for _, classInherit := range c.AllInheritsClassInfo() {
assignStmts = strings.Replace(assignStmts, classInherit.Class.ClassName+`::`, cppSubclassName(c)+`::`, -1)
}
//
ret.WriteString(
m.ReturnType.RenderTypeCabi() + " " + cabiProtectedBaseName(c, m) + "(bool* _dynamic_cast_ok, " + emitParametersCabi(m, ifv(m.IsConst, "const ", "")+"void*") + ") {\n" +
@ -1369,7 +1393,7 @@ extern "C" {
"\t\n" +
"\t*_dynamic_cast_ok = true;\n" +
"\t" + vbpreamble + "\n" +
emitAssignCppToCabi("\treturn ", m.ReturnType, vbCallTarget) + "\n" +
assignStmts + "\n" +
"}\n" +
"\n",
)