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package_test.go
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package_test.go
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/*
Copyright 2021 The GoPlus Authors (goplus.org)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package gogen_test
import (
"bytes"
"go/ast"
"go/constant"
"go/parser"
"go/token"
"go/types"
"log"
"os"
"syscall"
"testing"
"unsafe"
"github.com/goplus/gogen"
"github.com/goplus/gogen/packages"
"golang.org/x/tools/go/gcexportdata"
)
var (
gblFset *token.FileSet
gblImp types.Importer
handleErr func(err error)
)
func init() {
gogen.SetDebug(gogen.DbgFlagAll)
gblFset = token.NewFileSet()
gblImp = packages.NewImporter(gblFset)
}
func ctxRef(pkg *gogen.Package, name string) gogen.Ref {
_, o := pkg.CB().Scope().LookupParent(name, token.NoPos)
return o
}
type eventRecorder struct{}
func (p eventRecorder) Member(id ast.Node, obj types.Object) {}
func (p eventRecorder) Call(fn ast.Node, obj types.Object) {}
func newMainPackage(
implicitCast ...func(pkg *gogen.Package, V, T types.Type, pv *gogen.Element) bool) *gogen.Package {
return newPackage("main", implicitCast...)
}
func newPackage(
name string, implicitCast ...func(pkg *gogen.Package, V, T types.Type, pv *gogen.Element) bool) *gogen.Package {
conf := &gogen.Config{
Fset: gblFset,
Importer: gblImp,
Recorder: eventRecorder{},
NodeInterpreter: nodeInterp{},
DbgPositioner: nodeInterp{},
}
if len(implicitCast) > 0 {
conf.CanImplicitCast = implicitCast[0]
}
if handleErr != nil {
conf.HandleErr = handleErr
handleErr = nil
}
return gogen.NewPackage("", name, conf)
}
func domTest(t *testing.T, pkg *gogen.Package, expected string) {
domTestEx(t, pkg, expected, "")
}
func domTestEx(t *testing.T, pkg *gogen.Package, expected string, fname string) {
var b bytes.Buffer
t.Helper()
err := gogen.WriteTo(&b, pkg, fname)
if err != nil {
t.Fatal("gogen.WriteTo failed:", err)
}
result := b.String()
if result != expected {
t.Fatalf("\nResult:\n%s\nExpected:\n%s\n", result, expected)
}
log.Printf("====================== %s End =========================\n", t.Name())
}
type importer struct {
packages map[string]*types.Package
imp types.Importer
}
func (i *importer) Import(path string) (*types.Package, error) {
if pkg, ok := i.packages[path]; ok {
return pkg, nil
}
return i.imp.Import(path)
}
type goxTest struct {
fset *token.FileSet
imp *importer
}
func newGoxTest() *goxTest {
fset := token.NewFileSet()
return &goxTest{
fset: fset,
imp: &importer{
packages: make(map[string]*types.Package),
imp: packages.NewImporter(fset),
},
}
}
func (p *goxTest) LoadGoPackage(pkgPath string, filename string, src string) (*types.Package, error) {
if src == "" {
return p.imp.imp.Import(pkgPath)
}
f, err := parser.ParseFile(p.fset, filename, src, 0)
if err != nil {
return nil, err
}
conf := types.Config{Importer: p.imp}
pkg, err := conf.Check(pkgPath, p.fset, []*ast.File{f}, nil)
if err != nil {
return nil, err
}
p.imp.packages[pkgPath] = pkg
return pkg, nil
}
func (p *goxTest) NewPackage(pkgPath string, name string) *gogen.Package {
conf := &gogen.Config{
Fset: p.fset,
Importer: p.imp,
NodeInterpreter: nodeInterp{},
DbgPositioner: nodeInterp{},
}
return gogen.NewPackage(pkgPath, name, conf)
}
type goxVar = types.Var
// ----------------------------------------------------------------------------
func TestRedupPkgIssue796(t *testing.T) {
pkg := newMainPackage()
builtin := pkg.Import("github.com/goplus/gogen/internal/builtin")
builtin.EnsureImported()
context := pkg.Import("context")
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
Val(context.Ref("WithTimeout")).
Val(context.Ref("Background")).Call(0).
Val(pkg.Import("time").Ref("Minute")).Call(2).EndStmt().
End()
domTest(t, pkg, `package main
import (
"context"
"time"
)
func main() {
context.WithTimeout(context.Background(), time.Minute)
}
`)
}
func TestBTIMethod(t *testing.T) {
pkg := newMainPackage()
fmt := pkg.Import("fmt")
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(types.NewChan(0, types.Typ[types.Int]), "a").
NewVar(types.NewSlice(types.Typ[types.Int]), "b").
NewVar(types.NewSlice(types.Typ[types.String]), "c").
NewVar(types.NewMap(types.Typ[types.String], types.Typ[types.Int]), "d").
NewVar(types.Typ[types.Int64], "e").
Val(fmt.Ref("Println")).VarVal("a").MemberVal("Len").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("b").MemberVal("Len").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("c").MemberVal("Len").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("d").MemberVal("Len").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("c").MemberVal("Join").Val(",").Call(1).Call(1).EndStmt().
Val(fmt.Ref("Println")).Val("Hi").MemberVal("Len").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).Val("100").MemberVal("Int").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).Val("100").MemberVal("Uint64").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).Val(100).MemberVal("String").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).Val(1.34).MemberVal("String").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("e").Debug(
func(cb *gogen.CodeBuilder) {
cb.Member("string", gogen.MemberFlagAutoProperty)
}).Call(1).EndStmt().
End()
domTest(t, pkg, `package main
import (
"fmt"
"strconv"
"strings"
)
func main() {
var a chan int
var b []int
var c []string
var d map[string]int
var e int64
fmt.Println(len(a))
fmt.Println(len(b))
fmt.Println(len(c))
fmt.Println(len(d))
fmt.Println(strings.Join(c, ","))
fmt.Println(len("Hi"))
fmt.Println(strconv.Atoi("100"))
fmt.Println(strconv.ParseUint("100", 10, 64))
fmt.Println(strconv.Itoa(100))
fmt.Println(strconv.FormatFloat(1.34, 'g', -1, 64))
fmt.Println(strconv.FormatInt(e, 10))
}
`)
}
func TestTypedBTIMethod(t *testing.T) {
pkg := newMainPackage()
fmt := pkg.Import("fmt")
tyInt := pkg.NewType("MyInt").InitType(pkg, types.Typ[types.Int])
tyInt64 := pkg.NewType("MyInt64").InitType(pkg, types.Typ[types.Int64])
tyUint64 := pkg.NewType("MyUint64").InitType(pkg, types.Typ[types.Uint64])
tyFloat64 := pkg.NewType("MyFloat64").InitType(pkg, types.Typ[types.Float64])
tyString := pkg.NewType("MyString").InitType(pkg, types.Typ[types.String])
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(tyInt, "a").
NewVar(tyInt64, "b").
NewVar(tyUint64, "c").
NewVar(tyFloat64, "d").
NewVar(tyString, "e").
Val(fmt.Ref("Println")).VarVal("a").MemberVal("String").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("b").MemberVal("String").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("c").MemberVal("String").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("d").MemberVal("String").Call(0).Call(1).EndStmt().
Val(fmt.Ref("Println")).VarVal("e").MemberVal("ToUpper").Call(0).Call(1).EndStmt().
End()
domTest(t, pkg, `package main
import (
"fmt"
"strconv"
"strings"
)
type MyInt int
type MyInt64 int64
type MyUint64 uint64
type MyFloat64 float64
type MyString string
func main() {
var a MyInt
var b MyInt64
var c MyUint64
var d MyFloat64
var e MyString
fmt.Println(strconv.Itoa(int(a)))
fmt.Println(strconv.FormatInt(int64(b), 10))
fmt.Println(strconv.FormatUint(uint64(c), 10))
fmt.Println(strconv.FormatFloat(float64(d), 'g', -1, 64))
fmt.Println(strings.ToUpper(string(e)))
}
`)
}
func TestPrintlnPrintln(t *testing.T) {
pkg := newMainPackage()
fmt := pkg.Import("fmt")
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
Val(fmt.Ref("Println")).Val(fmt.Ref("Println")).Call(0).Call(1).EndStmt().
End()
domTest(t, pkg, `package main
import "fmt"
func main() {
fmt.Println(fmt.Println())
}
`)
}
func TestImportGopPkg(t *testing.T) {
pkg := newMainPackage()
foo := pkg.Import("github.com/goplus/gogen/internal/foo")
foo.EnsureImported()
nodeSet := foo.Ref("NodeSet")
if nodeSet == nil {
t.Fatal("TestImportGopPkg: NodeSet not found")
}
typ := nodeSet.(*types.TypeName).Type().(*types.Named)
for i, n := 0, typ.NumMethods(); i < n; i++ {
m := typ.Method(i)
if m.Name() == "Attr" {
funcs, ok := gogen.CheckOverloadMethod(m.Type().(*types.Signature))
if !ok || len(funcs) != 2 {
t.Fatal("CheckOverloadMethod failed:", funcs, ok)
}
return
}
}
t.Fatal("TestImportGopPkg: NodeSet.Attr not found")
}
func TestGoTypesPkg(t *testing.T) {
const src = `package foo
type mytype = byte
func bar(v mytype) rune {
return 0
}
`
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "foo.go", src, 0)
if err != nil {
t.Fatal("parser.ParseFile:", err)
}
packages := make(map[string]*types.Package)
imp := gcexportdata.NewImporter(fset, packages)
conf := types.Config{Importer: imp}
pkg, err := conf.Check("foo", fset, []*ast.File{f}, nil)
if err != nil {
t.Fatal("conf.Check:", err)
}
bar := pkg.Scope().Lookup("bar")
if bar.String() != "func foo.bar(v byte) rune" {
t.Fatal("bar.Type:", bar)
}
}
func TestMethods(t *testing.T) {
const src = `package foo
type foo struct {}
func (a foo) A() {}
func (p *foo) Bar() {}
`
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "foo.go", src, 0)
if err != nil {
t.Fatal("parser.ParseFile:", err)
}
packages := make(map[string]*types.Package)
imp := gcexportdata.NewImporter(fset, packages)
conf := types.Config{Importer: imp}
pkg, err := conf.Check("foo", fset, []*ast.File{f}, nil)
if err != nil {
t.Fatal("conf.Check:", err)
}
foo, ok := pkg.Scope().Lookup("foo").Type().(*types.Named)
if !ok {
t.Fatal("foo not found")
}
if foo.NumMethods() != 2 {
t.Fatal("foo.NumMethods:", foo.NumMethods())
}
if foo0 := foo.Method(0).String(); foo0 != "func (foo.foo).A()" {
t.Fatal("foo.0 =", foo0)
}
if foo1 := foo.Method(1).String(); foo1 != "func (*foo.foo).Bar()" {
t.Fatal("foo.1 =", foo1)
}
}
// ----------------------------------------------------------------------------
func comment(txt string) *ast.CommentGroup {
return &ast.CommentGroup{List: []*ast.Comment{{Text: txt}}}
}
func TestBasic(t *testing.T) {
pkg := newMainPackage()
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).End()
if pkg.Ref("main") == nil {
t.Fatal("main not found")
}
domTest(t, pkg, `package main
func main() {
}
`)
}
func TestTestingFile(t *testing.T) {
pkg := newMainPackage()
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).End()
_, err := pkg.SetCurFile("test", false)
if err != syscall.ENOENT {
t.Fatal("pkg.SetCurFile failed:", err)
}
old, err := pkg.SetCurFile("test", true)
if err != nil {
t.Fatal("pkg.SetCurFile failed:", err)
}
pkg.NewFunc(nil, "foo", nil, nil, false).BodyStart(pkg).End()
domTestEx(t, pkg, `package main
func foo() {
}
`, "test")
if pkg.CurFile().Name() != "test" {
t.Fatal("TestTestingFile: curfile =", pkg.CurFile().Name())
}
err = gogen.WriteFile("_gop_autogen_test.go", pkg, "test")
pkg.RestoreCurFile(old)
if err != nil {
t.Fatal("gogen.WriteFile failed:", err)
}
os.Remove("_gop_autogen_test.go")
err = gogen.WriteTo(nil, pkg, "unknown")
if err != syscall.ENOENT {
t.Fatal("gogen.WriteTo failed:", err)
}
if gogen.ASTFile(pkg, "unknown") != nil {
t.Fatal("gogen.ASTFile: not nil")
}
if gogen.CommentedASTFile(pkg, "unknown") != nil {
t.Fatal("gogen.CommentedASTFile: not nil")
}
err = gogen.WriteFile("?.go", pkg, "unknown")
if err != syscall.ENOENT {
t.Fatal("gogen.WriteFile failed:", err)
}
pkg.ForEachFile(func(fname string, file *gogen.File) {
if fname != "" && fname != "test" {
t.Fatal("pkg.ForEachFile unexpected file:", fname)
}
})
}
func TestMake(t *testing.T) {
pkg := newMainPackage()
tySlice := types.NewSlice(types.Typ[types.Int])
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVarStart(tySlice, "a").Val(pkg.Builtin().Ref("make")).
/**/ Typ(tySlice).Val(0).Val(2).Call(3).EndInit(1).
End()
domTest(t, pkg, `package main
func main() {
var a []int = make([]int, 0, 2)
}
`)
}
func TestNew(t *testing.T) {
pkg := newMainPackage()
tyInt := types.Typ[types.Int]
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVarStart(types.NewPointer(tyInt), "a").Val(pkg.Builtin().Ref("new")).
Val(ctxRef(pkg, "int")).Call(1).EndInit(1).
End()
domTest(t, pkg, `package main
func main() {
var a *int = new(int)
}
`)
}
func TestTypeConv(t *testing.T) { // TypeCast
pkg := newMainPackage()
tyInt := types.Typ[types.Uint32]
tyPInt := types.NewPointer(tyInt)
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVarStart(tyInt, "a").Typ(tyInt).Val(0).Call(1).EndInit(1).
NewVarStart(tyPInt, "b").Typ(tyPInt).Val(nil).Call(1).EndInit(1).
End()
domTest(t, pkg, `package main
func main() {
var a uint32 = uint32(0)
var b *uint32 = (*uint32)(nil)
}
`)
}
func TestTypeConvBool(t *testing.T) { // TypeCast
pkg := newMainPackage()
tyBool := types.Typ[types.Bool]
tyInt := types.Typ[types.Uint32]
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVarStart(tyBool, "a").Val(false).EndInit(1).
NewVarStart(tyInt, "b").Typ(tyInt).VarVal("a").Call(1).EndInit(1).
End()
domTest(t, pkg, `package main
func main() {
var a bool = false
var b uint32 = func() uint32 {
if a {
return 1
} else {
return 0
}
}()
}
`)
}
func TestIncDec(t *testing.T) {
pkg := newMainPackage()
tyInt := types.Typ[types.Uint]
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
SetComments(comment("\n// new var a"), false).
NewVar(tyInt, "a").
SetComments(comment("\n// inc a"), true).
VarRef(ctxRef(pkg, "a")).IncDec(token.INC).EndStmt().
VarRef(ctxRef(pkg, "a")).IncDec(token.DEC).EndStmt().
End()
cb := pkg.CB()
if c, _ := cb.BackupComments(); c != nil || cb.Comments() != nil {
t.Fatal("comment is not nil")
}
domTest(t, pkg, `package main
func main() {
// new var a
var a uint
// inc a
a++
a--
}
`)
}
func TestSend(t *testing.T) {
pkg := newMainPackage()
tyChan := types.NewChan(types.SendRecv, types.Typ[types.Uint])
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(tyChan, "a").
VarVal("a").Val(1).Send().
End()
domTest(t, pkg, `package main
func main() {
var a chan uint
a <- 1
}
`)
}
func TestRecv(t *testing.T) {
pkg := newMainPackage()
tyChan := types.NewChan(types.SendRecv, types.Typ[types.Uint])
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(tyChan, "a").
NewVarStart(types.Typ[types.Uint], "b").VarVal("a").UnaryOp(token.ARROW).EndInit(1).
DefineVarStart(0, "c", "ok").VarVal("a").UnaryOp(token.ARROW, true, nil).EndInit(1).
End()
domTest(t, pkg, `package main
func main() {
var a chan uint
var b uint = <-a
c, ok := <-a
}
`)
}
func TestRecv2(t *testing.T) {
pkg := newMainPackage()
tyChan := types.NewChan(types.SendRecv, types.Typ[types.Uint])
typ := pkg.NewType("T").InitType(pkg, tyChan)
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(typ, "a").
NewVarStart(types.Typ[types.Uint], "b").VarVal("a").UnaryOp(token.ARROW).EndInit(1).
DefineVarStart(0, "c", "ok").VarVal("a").UnaryOp(token.ARROW, true).EndInit(1).
End()
domTest(t, pkg, `package main
type T chan uint
func main() {
var a T
var b uint = <-a
c, ok := <-a
}
`)
}
func TestRecv3(t *testing.T) {
pkg := newMainPackage()
tyUint := pkg.NewType("Uint").InitType(pkg, types.Typ[types.Uint])
tyChan := types.NewChan(types.SendRecv, tyUint)
typ := pkg.NewType("T").InitType(pkg, tyChan)
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(typ, "a").
NewVarStart(tyUint, "b").VarVal("a").UnaryOp(token.ARROW).EndInit(1).
DefineVarStart(0, "c", "ok").VarVal("a").UnaryOp(token.ARROW, true).EndInit(1).
End()
domTest(t, pkg, `package main
type Uint uint
type T chan Uint
func main() {
var a T
var b Uint = <-a
c, ok := <-a
}
`)
}
func TestZeroLit(t *testing.T) {
pkg := newMainPackage()
tyMap := types.NewMap(types.Typ[types.String], types.Typ[types.Int])
ret := pkg.NewAutoParam("ret")
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVarStart(tyMap, "a").
/**/ NewClosure(nil, gogen.NewTuple(ret), false).BodyStart(pkg).
/******/ VarRef(ctxRef(pkg, "ret")).ZeroLit(ret.Type()).Assign(1).
/******/ Val(ctxRef(pkg, "ret")).Val("Hi").IndexRef(1).Val(1).Assign(1).
/******/ Return(0).
/**/ End().Call(0).EndInit(1).
End()
domTest(t, pkg, `package main
func main() {
var a map[string]int = func() (ret map[string]int) {
ret = map[string]int{}
ret["Hi"] = 1
return
}()
}
`)
}
func TestZeroLitAllTypes(t *testing.T) {
pkg := newMainPackage()
tyString := types.Typ[types.String]
tyBool := types.Typ[types.Bool]
tyUP := types.Typ[types.UnsafePointer]
tyMap := types.NewMap(tyString, types.Typ[types.Int])
tySlice := types.NewSlice(types.Typ[types.Int])
tyArray := gogen.NewArray(types.Typ[types.Int], 10)
tyPointer := gogen.NewPointer(types.Typ[types.Int])
tyChan := types.NewChan(types.SendRecv, types.Typ[types.Int])
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVarStart(tyMap, "a").ZeroLit(tyMap).EndInit(1).
NewVarStart(tySlice, "b").ZeroLit(tySlice).EndInit(1).
NewVarStart(tyPointer, "c").ZeroLit(tyPointer).EndInit(1).
NewVarStart(tyChan, "d").ZeroLit(tyChan).EndInit(1).
NewVarStart(tyBool, "e").ZeroLit(tyBool).EndInit(1).
NewVarStart(tyString, "f").ZeroLit(tyString).EndInit(1).
NewVarStart(tyUP, "g").ZeroLit(tyUP).EndInit(1).
NewVarStart(gogen.TyEmptyInterface, "h").ZeroLit(gogen.TyEmptyInterface).EndInit(1).
NewVarStart(tyArray, "i").ZeroLit(tyArray).EndInit(1).
End()
domTest(t, pkg, `package main
import "unsafe"
func main() {
var a map[string]int = nil
var b []int = nil
var c *int = nil
var d chan int = nil
var e bool = false
var f string = ""
var g unsafe.Pointer = nil
var h interface{} = nil
var i [10]int = [10]int{}
}
`)
}
func TestTypeDeclInFunc(t *testing.T) {
pkg := newMainPackage()
fields := []*types.Var{
types.NewField(token.NoPos, pkg.Types, "x", types.Typ[types.Int], false),
types.NewField(token.NoPos, pkg.Types, "y", types.Typ[types.String], false),
}
typ := types.NewStruct(fields, nil)
cb := pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg)
foo := cb.NewType("foo").InitType(pkg, typ)
cb.AliasType("bar", typ)
a := cb.AliasType("a", foo)
cb.AliasType("b", a)
cb.End()
domTest(t, pkg, `package main
func main() {
type foo struct {
x int
y string
}
type bar = struct {
x int
y string
}
type a = foo
type b = a
}
`)
}
func TestTypeDoc(t *testing.T) {
pkg := newMainPackage()
typ := types.NewStruct(nil, nil)
def := pkg.NewTypeDefs().SetComments(nil)
def.NewType("foo").SetComments(pkg, comment("\n//go:notinheap")).InitType(pkg, typ)
def.Complete()
domTest(t, pkg, `package main
//go:notinheap
type foo struct {
}
`)
}
func TestDeleteType(t *testing.T) {
pkg := newMainPackage()
typ := types.NewStruct(nil, nil)
def := pkg.NewTypeDefs()
decl := def.NewType("foo")
if decl.State() != gogen.TyStateUninited {
t.Fatal("TypeDecl.State failed")
}
decl.InitType(pkg, typ)
if decl.State() != gogen.TyStateInited {
t.Fatal("TypeDecl.State failed")
}
decl.Delete()
if decl.State() != gogen.TyStateDeleted {
t.Fatal("TypeDecl.State failed")
}
def.NewType("t").InitType(def.Pkg(), gogen.TyByte)
def.NewType("bar").Delete()
def.Complete()
domTest(t, pkg, `package main
type t byte
`)
}
func TestTypeDecl(t *testing.T) {
pkg := newMainPackage()
fields := []*types.Var{
types.NewField(token.NoPos, pkg.Types, "x", types.Typ[types.Int], false),
types.NewField(token.NoPos, pkg.Types, "y", types.Typ[types.String], false),
}
typ := types.NewStruct(fields, nil)
foo := pkg.NewType("foo").InitType(pkg, typ)
pkg.AliasType("bar", typ)
a := pkg.AliasType("a", foo)
pkg.AliasType("b", a)
domTest(t, pkg, `package main
type foo struct {
x int
y string
}
type bar = struct {
x int
y string
}
type a = foo
type b = a
`)
}
func TestTypeCycleDef(t *testing.T) {
pkg := newMainPackage()
foo := pkg.NewType("foo")
a := pkg.AliasType("a", foo.Type())
b := pkg.AliasType("b", a)
fields := []*types.Var{
types.NewField(token.NoPos, pkg.Types, "p", types.NewPointer(b), false),
}
foo.InitType(pkg, types.NewStruct(fields, nil))
domTest(t, pkg, `package main
type foo struct {
p *b
}
type a = foo
type b = a
`)
}
func TestTypeMethods(t *testing.T) {
pkg := newMainPackage()
fields := []*types.Var{
types.NewField(token.NoPos, pkg.Types, "x", types.Typ[types.Int], false),
types.NewField(token.NoPos, pkg.Types, "y", types.Typ[types.String], false),
}
typ := types.NewStruct(fields, nil)
foo := pkg.NewType("foo").InitType(pkg, typ)
recv := pkg.NewParam(token.NoPos, "a", foo)
precv := pkg.NewParam(token.NoPos, "p", types.NewPointer(foo))
pkg.NewFunc(recv, "Bar", nil, nil, false).SetComments(pkg, comment("\n// abc")).BodyStart(pkg).End()
pkg.NewFunc(precv, "Print", nil, nil, false).BodyStart(pkg).End()
if foo.NumMethods() != 2 {
t.Fatal("foo.NumMethods != 2")
}
domTest(t, pkg, `package main
type foo struct {
x int
y string
}
// abc
func (a foo) Bar() {
}
func (p *foo) Print() {
}
`)
}
func TestAssignInterface(t *testing.T) {
pkg := newMainPackage()
foo := pkg.NewType("foo").InitType(pkg, types.Typ[types.Int])
recv := pkg.NewParam(token.NoPos, "a", foo)
ret := pkg.NewParam(token.NoPos, "ret", types.Typ[types.String])
pkg.NewFunc(recv, "Error", nil, types.NewTuple(ret), false).BodyStart(pkg).
Return(0).
End()
pkg.CB().NewVarStart(gogen.TyError, "err").
Typ(foo).ZeroLit(foo).Call(1).
EndInit(1)
domTest(t, pkg, `package main
type foo int
func (a foo) Error() (ret string) {
return
}
var err error = foo(0)
`)
}
func TestAssignUserInterface(t *testing.T) {
pkg := newMainPackage()
methods := []*types.Func{
types.NewFunc(token.NoPos, pkg.Types, "Bar", types.NewSignatureType(nil, nil, nil, nil, nil, false)),
}
tyInterf := types.NewInterfaceType(methods, nil).Complete()
typStruc := types.NewStruct(nil, nil)
foo := pkg.NewType("foo").InitType(pkg, tyInterf)
bar := pkg.NewType("bar").InitType(pkg, typStruc)
pbar := types.NewPointer(bar)
recv := pkg.NewParam(token.NoPos, "p", pbar)
vfoo := types.NewTuple(pkg.NewParam(token.NoPos, "v", types.NewSlice(foo)))
pkg.NewFunc(recv, "Bar", nil, nil, false).BodyStart(pkg).End()
pkg.NewFunc(nil, "f", vfoo, nil, true).BodyStart(pkg).End()
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(pbar, "v").
VarVal("f").
VarVal("v").VarVal("v").Call(2).EndStmt().
End()
domTest(t, pkg, `package main
type foo interface {
Bar()
}
type bar struct {
}
func (p *bar) Bar() {
}
func f(v ...foo) {
}
func main() {
var v *bar
f(v, v)
}
`)
}
func TestTypeAssert(t *testing.T) {
pkg := newMainPackage()
params := types.NewTuple(pkg.NewParam(token.NoPos, "v", gogen.TyEmptyInterface))
pkg.NewFunc(nil, "foo", params, nil, false).BodyStart(pkg, source("{}", 1, 5)).
DefineVarStart(0, "x").VarVal("v").TypeAssert(types.Typ[types.Int], false).EndInit(1).
DefineVarStart(0, "y", "ok").VarVal("v").TypeAssert(types.Typ[types.String], true).EndInit(1).
End()
domTest(t, pkg, `package main
func foo(v interface{}) {
x := v.(int)
y, ok := v.(string)
}
`)
}
func newFuncDecl(pkg *gogen.Package, name string, params, results *types.Tuple) *gogen.Func {
sig := types.NewSignatureType(nil, nil, nil, params, results, false)
return pkg.NewFuncDecl(token.NoPos, name, sig)
}
func TestTypeSwitch(t *testing.T) {
pkg := newMainPackage()
p := pkg.NewParam(token.NoPos, "p", types.NewPointer(gogen.TyEmptyInterface))
v := pkg.NewParam(token.NoPos, "v", gogen.TyEmptyInterface)
newFuncDecl(pkg, "bar", types.NewTuple(p), nil)
newFuncDecl(pkg, "foo", types.NewTuple(v), nil).BodyStart(pkg).
/**/ TypeSwitch("t").Val(v).TypeAssertThen().
/****/ TypeCase().Typ(types.Typ[types.Int]).Typ(types.Typ[types.String]).Then().
/******/ Val(ctxRef(pkg, "bar")).VarRef(ctxRef(pkg, "t")).UnaryOp(token.AND).Call(1).EndStmt().
/****/ End().
/**/ TypeCase().Typ(types.Typ[types.Bool]).Then().
/******/ NewVarStart(types.Typ[types.Bool], "x").Val(ctxRef(pkg, "t")).EndInit(1).
/****/ End().
/****/ TypeDefaultThen().
/******/ Val(ctxRef(pkg, "bar")).VarRef(ctxRef(pkg, "t")).UnaryOp(token.AND).Call(1).EndStmt().
/****/ End().
/**/ End().
End()
domTest(t, pkg, `package main
func bar(p *interface{})
func foo(v interface{}) {
switch t := v.(type) {
case int, string:
bar(&t)
case bool:
var x bool = t
default:
bar(&t)
}
}
`)
}
func TestTypeSwitch2(t *testing.T) {
pkg := newMainPackage()
p := pkg.NewParam(token.NoPos, "p", types.NewPointer(gogen.TyEmptyInterface))
v := pkg.NewParam(token.NoPos, "v", gogen.TyEmptyInterface)
pkg.NewFunc(nil, "bar", types.NewTuple(p), nil, false).BodyStart(pkg).End()
pkg.NewFunc(nil, "foo", types.NewTuple(v), nil, false).BodyStart(pkg).
/**/ TypeSwitch("").Val(ctxRef(pkg, "bar")).Val(nil).Call(1).EndStmt().Val(v).TypeAssertThen().
/****/ TypeCase().Typ(types.Typ[types.Int]).Then().
/******/ Val(ctxRef(pkg, "bar")).VarRef(ctxRef(pkg, "v")).UnaryOp(token.AND).Call(1).EndStmt().
/****/ End().
/**/ End().
End()
domTest(t, pkg, `package main
func bar(p *interface{}) {
}
func foo(v interface{}) {
switch bar(nil); v.(type) {
case int:
bar(&v)
}
}
`)
}
func TestSelect(t *testing.T) {
pkg := newMainPackage()
tyXchg := types.NewChan(types.SendRecv, types.Typ[types.Int])
pkg.NewFunc(nil, "main", nil, nil, false).BodyStart(pkg).
NewVar(tyXchg, "xchg").
/**/ Select().
/****/ CommCase().DefineVarStart(0, "x").Val(ctxRef(pkg, "xchg")).UnaryOp(token.ARROW).EndInit(1).Then().
/******/ NewVarStart(types.Typ[types.Int], "t").Val(ctxRef(pkg, "x")).EndInit(1).
/****/ End().
/****/ CommCase().Val(ctxRef(pkg, "xchg")).Val(1).Send().Then().
/******/ DefineVarStart(0, "x").Val(1).EndInit(1).
/****/ End().
/****/ CommDefaultThen().
/******/ DefineVarStart(0, "x").Val("Hi").EndInit(1).
/****/ End().
/**/ End().
End()
domTest(t, pkg, `package main
func main() {
var xchg chan int
select {
case x := <-xchg:
var t int = x
case xchg <- 1:
x := 1
default:
x := "Hi"
}
}