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loop.go
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loop.go
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package estree
import (
"encoding/json"
"fmt"
)
// WhileStatement is a while loop.
type WhileStatement struct {
baseStatement
Loc SourceLocation
Test Expression
Body Statement
}
func (WhileStatement) Type() string { return "WhileStatement" }
func (ws WhileStatement) Location() SourceLocation { return ws.Loc }
func (ws WhileStatement) IsZero() bool {
return ws.Loc.IsZero() &&
(ws.Test == nil || ws.Test.IsZero()) &&
(ws.Body == nil || ws.Body.IsZero())
}
func (ws WhileStatement) Walk(v Visitor) {
if v = v.Visit(ws); v != nil {
defer v.Visit(nil)
if ws.Test != nil {
ws.Test.Walk(v)
}
if ws.Body != nil {
ws.Body.Walk(v)
}
}
}
func (ws WhileStatement) Errors() []error {
c := nodeChecker{Node: ws}
c.require(ws.Test, "while expression")
c.require(ws.Body, "while body")
return c.errors()
}
func (ws WhileStatement) MarshalJSON() ([]byte, error) {
x := nodeToMap(ws)
x["test"] = ws.Test
x["body"] = ws.Body
return json.Marshal(x)
}
func (ws *WhileStatement) UnmarshalJSON(b []byte) error {
var x struct {
Type string `json:"type"`
Loc SourceLocation `json:"loc"`
Test json.RawMessage `json:"test"`
Body json.RawMessage `json:"body"`
}
err := json.Unmarshal(b, &x)
if err == nil && x.Type != ws.Type() {
err = fmt.Errorf("%w %s, got %q", ErrWrongType, ws.Type(), x.Type)
}
if err == nil {
ws.Loc = x.Loc
ws.Test, _, err = unmarshalExpression(x.Test)
var err2 error
if ws.Body, _, err2 = unmarshalStatement(x.Body); err == nil && err2 != nil {
err = err2
}
}
return err
}
// DoWhileStatement is a do / while loop.
type DoWhileStatement struct {
baseStatement
Loc SourceLocation
Body Statement
Test Expression
}
func (DoWhileStatement) Type() string { return "DoWhileStatement" }
func (dws DoWhileStatement) Location() SourceLocation { return dws.Loc }
func (dws DoWhileStatement) IsZero() bool {
return dws.Loc.IsZero() &&
(dws.Body == nil || dws.Body.IsZero()) &&
(dws.Test == nil || dws.Test.IsZero())
}
func (dws DoWhileStatement) Walk(v Visitor) {
if v = v.Visit(dws); v != nil {
defer v.Visit(nil)
if dws.Body != nil {
dws.Body.Walk(v)
}
if dws.Test != nil {
dws.Test.Walk(v)
}
}
}
func (dws DoWhileStatement) Errors() []error {
c := nodeChecker{Node: dws}
c.require(dws.Body, "while body")
c.require(dws.Test, "while expression")
return c.errors()
}
func (dws DoWhileStatement) MarshalJSON() ([]byte, error) {
x := nodeToMap(dws)
x["body"] = dws.Body
x["test"] = dws.Test
return json.Marshal(x)
}
func (dws *DoWhileStatement) UnmarshalJSON(b []byte) error {
var x struct {
Type string `json:"type"`
Loc SourceLocation `json:"loc"`
Body json.RawMessage `json:"body"`
Test json.RawMessage `json:"test"`
}
err := json.Unmarshal(b, &x)
if err == nil && x.Type != dws.Type() {
err = fmt.Errorf("%w %s, got %q", ErrWrongType, dws.Type(), x.Type)
}
if err == nil {
dws.Loc = x.Loc
dws.Body, _, err = unmarshalStatement(x.Body)
var err2 error
if dws.Test, _, err = unmarshalExpression(x.Test); err == nil && err2 != nil {
err = err2
}
}
return err
}
// ForStatement is a for loop.
type ForStatement struct {
baseStatement
Loc SourceLocation
Init VariableDeclarationOrExpression // or nil
Test Expression // or nil
Update Expression // or nil
Body Statement
}
func (ForStatement) Type() string { return "ForStatement" }
func (fs ForStatement) Location() SourceLocation { return fs.Loc }
func (fs ForStatement) IsZero() bool {
return fs.Loc.IsZero() &&
(fs.Init == nil || fs.Init.IsZero()) &&
(fs.Test == nil || fs.Test.IsZero()) &&
(fs.Update == nil || fs.Update.IsZero()) &&
(fs.Body == nil || fs.Body.IsZero())
}
func (fs ForStatement) Walk(v Visitor) {
if v = v.Visit(fs); v != nil {
defer v.Visit(nil)
if fs.Init != nil {
fs.Init.Walk(v)
}
if fs.Test != nil {
fs.Test.Walk(v)
}
if fs.Update != nil {
fs.Update.Walk(v)
}
if fs.Body != nil {
fs.Body.Walk(v)
}
}
}
func (fs ForStatement) Errors() []error {
c := nodeChecker{Node: fs}
c.optional(fs.Init)
c.optional(fs.Test)
c.optional(fs.Update)
c.require(fs.Body, "for body")
return c.errors()
}
func (fs ForStatement) MarshalJSON() ([]byte, error) {
x := nodeToMap(fs)
if fs.Init != nil && !fs.Init.IsZero() {
x["init"] = fs.Init
}
if fs.Test != nil && !fs.Test.IsZero() {
x["test"] = fs.Test
}
if fs.Update != nil && !fs.Update.IsZero() {
x["update"] = fs.Update
}
x["body"] = fs.Body
return json.Marshal(x)
}
func (fs *ForStatement) UnmarshalJSON(b []byte) error {
var x struct {
Type string `json:"type"`
Loc SourceLocation `json:"loc"`
Init json.RawMessage `json:"init"`
Test json.RawMessage `json:"test"`
Update json.RawMessage `json:"update"`
Body json.RawMessage `json:"body"`
}
err := json.Unmarshal(b, &x)
if err == nil && x.Type != fs.Type() {
err = fmt.Errorf("%w %s, got %q", ErrWrongType, fs.Type(), x.Type)
}
if err == nil && len(x.Init) > 0 {
fs.Loc = x.Loc
fs.Init, err = unmarshalVariableDeclarationOrExpression(x.Init)
var err2 error
fs.Test, _, err2 = unmarshalExpression(x.Test)
if err == nil && err2 != nil {
err = err2
}
fs.Update, _, err2 = unmarshalExpression(x.Update)
if err == nil && err2 != nil {
err = err2
}
fs.Body, _, err2 = unmarshalStatement(x.Body)
if err == nil && err2 != nil {
err = err2
}
}
return err
}
type ForInStatement struct {
baseStatement
Loc SourceLocation
Left VariableDeclarationOrPattern
Right Expression
Body Statement
}
func (ForInStatement) Type() string { return "ForInStatement" }
func (fis ForInStatement) Location() SourceLocation { return fis.Loc }
func (fis ForInStatement) IsZero() bool {
return fis.Loc.IsZero() &&
(fis.Left == nil || fis.Left.IsZero()) &&
(fis.Right == nil || fis.Right.IsZero()) &&
(fis.Body == nil || fis.Body.IsZero())
}
func (fis ForInStatement) Walk(v Visitor) {
if v = v.Visit(fis); v != nil {
defer v.Visit(nil)
if fis.Left != nil {
fis.Left.Walk(v)
}
if fis.Right != nil {
fis.Right.Walk(v)
}
if fis.Body != nil {
fis.Body.Walk(v)
}
}
}
func (fis ForInStatement) Errors() []error {
c := nodeChecker{Node: fis}
c.require(fis.Left, "left-hand for...in expression")
c.require(fis.Right, "right-hand for...in expression")
c.require(fis.Body, "for...in body")
return c.errors()
}
func (fis ForInStatement) MarshalJSON() ([]byte, error) {
x := nodeToMap(fis)
x["left"] = fis.Left
x["right"] = fis.Right
x["body"] = fis.Body
return json.Marshal(x)
}
func (fis *ForInStatement) UnmarshalJSON(b []byte) error {
var x struct {
Type string `json:"type"`
Loc SourceLocation `json:"loc"`
Left json.RawMessage `json:"left"`
Right json.RawMessage `json:"right"`
Body json.RawMessage `json:"body"`
}
err := json.Unmarshal(b, &x)
if err == nil && x.Type != fis.Type() {
err = fmt.Errorf("%w %s, got %q", ErrWrongType, fis.Type(), x.Type)
}
if err == nil {
fis.Loc = x.Loc
fis.Left, err = unmarshalVariableDeclarationOrPattern(x.Left)
var err2 error
if fis.Right, _, err = unmarshalExpression(x.Right); err == nil && err2 != nil {
err = err2
}
if fis.Body, _, err = unmarshalStatement(x.Body); err == nil && err2 != nil {
err = err2
}
}
return err
}