//
// On 386, if cdecl is true, the returned C function will use the
// cdecl calling convention; otherwise, it will use stdcall. On amd64,
// it always uses fastcall. On arm, it always uses the ARM convention.
//
//go:linkname compileCallback syscall.compileCallback
func compileCallback(fn eface, cdecl bool) (code uintptr) {
	if GOARCH != "386" {
		// cdecl is only meaningful on 386.
		cdecl = false
	}

	JE	docall

	// Copy args to the stack.
	MOVL	CX, AX
	SALL	$2, AX
	SUBL	AX, SP			// room for args
	MOVL	SP, DI
	MOVL	libcall_args(BX), SI
	CLD
	REP; MOVSL

docall:
	// Call stdcall or cdecl function.
	// DI SI BP BX are preserved, SP is not
	CALL	libcall_fn(BX)
	MOVL	BP, SP

	// Return result.
	MOVL	fn+0(FP), BX
	MOVL	AX, libcall_r1(BX)
	MOVL	DX, libcall_r2(BX)

	// GetLastError().

	saved := obj.color_
	obj.color_ = black
	fdecl := decl.fdecl
	check.funcType(sig, fdecl.Recv, fdecl.TParamList, fdecl.Type)
	obj.color_ = saved

	// Set the scope's extent to the complete "func (...) { ... }"
	// so that Scope.Innermost works correctly.
	sig.scope.pos = fdecl.Pos()
	sig.scope.end = syntax.EndPos(fdecl)

	if len(fdecl.TParamList) > 0 && fdecl.Body == nil {

	saved := obj.color_
	obj.color_ = black
	fdecl := decl.fdecl
	check.funcType(sig, fdecl.Recv, fdecl.Type)
	obj.color_ = saved

	// Set the scope's extent to the complete "func (...) { ... }"
	// so that Scope.Innermost works correctly.
	sig.scope.pos = fdecl.Pos()
	sig.scope.end = fdecl.End()

	if fdecl.Type.TypeParams.NumFields() > 0 && fdecl.Body == nil {

			case funcDecl:
				name := d.decl.Name.Name
				obj := NewFunc(d.decl.Name.Pos(), pkg, name, nil) // signature set later
				hasTParamError := false                           // avoid duplicate type parameter errors
				if d.decl.Recv.NumFields() == 0 {
					// regular function
					if d.decl.Recv != nil {
						check.error(d.decl.Recv, BadRecv, "method has no receiver")

func NewCallback(fn any) uintptr {
	return compileCallback(fn, true)
}

// NewCallbackCDecl converts a Go function to a function pointer conforming to the cdecl calling convention.
// This is useful when interoperating with Windows code requiring callbacks.

		if seen[tname] {
			return false, nil
		}

		// we're done if tdecl defined tname as a new type
		// (rather than an alias)
		tdecl := check.objMap[tname].tdecl // must exist for objects in package scope
		if !tdecl.Alias {
			return ptr, tname
		}

		// otherwise, continue resolving
		typ = tdecl.Type
		if seen == nil {
			seen = make(map[*TypeName]bool)
		}
		seen[tname] = true

func NewCallback(fn interface{}) uintptr {
	return syscall.NewCallback(fn)
}

// NewCallbackCDecl converts a Go function to a function pointer conforming to the cdecl calling convention.
// This is useful when interoperating with Windows code requiring callbacks.

		Name       *Name
		TParamList []*Field // nil means no type parameters
		Type       *FuncType
		Body       *BlockStmt // nil means no body (forward declaration)
		decl
	}
)

type decl struct{ node }

func (*decl) aDecl() {}

// All declarations belonging to the same group point to the same Group node.
type Group struct {
	_ int // not empty so we are guaranteed different Group instances
}

// Otherwise it may be a Print wrapper.
func maybePrintfWrapper(info *types.Info, decl ast.Decl) *printfWrapper {
	// Look for functions with final argument type ...interface{}.
	fdecl, ok := decl.(*ast.FuncDecl)
	if !ok || fdecl.Body == nil {
		return nil
	}
	fn, ok := info.Defs[fdecl.Name].(*types.Func)
	// Type information may be incomplete.
	if !ok {
		return nil
	}