// Collect declarations from all package files.
	var decls []Decl
	if ndecls > 0 {
		decls = make([]Decl, ndecls)
		funcs := make(map[string]int) // map of func name -> decls index
		i := 0                        // current index
		n := 0                        // number of filtered entries
		for _, filename := range filenames {
			f := pkg.Files[filename]
			for _, d := range f.Decls {
				if mode&FilterFuncDuplicates != 0 {

	var fnDecls map[*types.Func]*ast.FuncDecl // computed lazily
	return func(f *types.Func) *ast.FuncDecl {
		if f != nil && fnDecls == nil {
			fnDecls = make(map[*types.Func]*ast.FuncDecl)
			for _, file := range files {
				for _, decl := range file.Decls {
					if fnDecl, ok := decl.(*ast.FuncDecl); ok {
						if fn, ok := info.Defs[fnDecl.Name].(*types.Func); ok {
							fnDecls[fn] = fnDecl

			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")

	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 {

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// variable declarations

package decls1

import (
	"math"
)

// Global variables without initialization
var (
	a, b bool
	c byte
	d uint8
	r rune
	i int
	j, k, l int
	x, y float32
	xx, yy float64
	u, v complex64
	uu, vv complex128
	s, t string

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// type aliases

package decls4

type (
	T0 [10]int
	T1 []byte
	T2 struct {
		x int
	}
	T3 interface{
		m() T2
	}
	T4 func(int, T0) chan T2
)

type (
	Ai = int
	A0 = T0
	A1 = T1
	A2 = T2
	A3 = T3
	A4 = T4

	A10 = [10]int

	funcDecl := &ast.FuncDecl{
		Name: ast.NewIdent("main"),
		Type: f.Type,
		Body: body,
	}

	decls := make([]ast.Decl, 0, 2+len(depDecls))
	decls = append(decls, importDecl)
	decls = append(decls, depDecls...)
	decls = append(decls, funcDecl)

	slices.SortFunc(decls, func(a, b ast.Decl) int {
		return cmp.Compare(a.Pos(), b.Pos())
	})
	slices.SortFunc(comments, func(a, b *ast.CommentGroup) int {

	var interner typeInterner

	fmt.Fprintf(w, "var %sDecls = [...]struct { name string; tag int; typ int }{\n", name)
	for _, decl := range f.Decls {
		switch decl := decl.(type) {
		case *ast.FuncDecl:
			if decl.Recv != nil {
				log.Fatal("methods unsupported")
			}
			if decl.Body != nil {
				log.Fatal("unexpected function body")
			}
			fmt.Fprintf(w, "{%q, funcTag, %d},\n", decl.Name.Name, interner.intern(decl.Type))

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// embedded types

package decls3

import "unsafe"
import "fmt"

// fields with the same name at the same level cancel each other out

func _() {
	type (
		T1 struct { X int }
		T2 struct { X int }

	if err != nil {
		log.Fatal(err)
	}

	decls := make(map[string]bool)

	fmt.Fprintf(w, "var builtins = [...]struct{ name string; abi int }{\n")
	for _, decl := range f.Decls {
		switch decl := decl.(type) {
		case *ast.FuncDecl:
			if decl.Recv != nil {
				log.Fatal("methods unsupported")
			}
			if decl.Body != nil {
				log.Fatal("unexpected function body")
			}