/
output_ast.ts
1877 lines (1618 loc) Β· 60.2 KB
/
output_ast.ts
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/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {ParseSourceSpan} from '../parse_util';
import {I18nMeta} from '../render3/view/i18n/meta';
//// Types
export enum TypeModifier {
Const
}
export abstract class Type {
constructor(public modifiers: TypeModifier[]|null = null) {
if (!modifiers) {
this.modifiers = [];
}
}
abstract visitType(visitor: TypeVisitor, context: any): any;
hasModifier(modifier: TypeModifier): boolean {
return this.modifiers!.indexOf(modifier) !== -1;
}
}
export enum BuiltinTypeName {
Dynamic,
Bool,
String,
Int,
Number,
Function,
Inferred,
None,
}
export class BuiltinType extends Type {
constructor(public name: BuiltinTypeName, modifiers: TypeModifier[]|null = null) {
super(modifiers);
}
visitType(visitor: TypeVisitor, context: any): any {
return visitor.visitBuiltinType(this, context);
}
}
export class ExpressionType extends Type {
constructor(
public value: Expression, modifiers: TypeModifier[]|null = null,
public typeParams: Type[]|null = null) {
super(modifiers);
}
visitType(visitor: TypeVisitor, context: any): any {
return visitor.visitExpressionType(this, context);
}
}
export class ArrayType extends Type {
constructor(public of: Type, modifiers: TypeModifier[]|null = null) {
super(modifiers);
}
visitType(visitor: TypeVisitor, context: any): any {
return visitor.visitArrayType(this, context);
}
}
export class MapType extends Type {
public valueType: Type|null;
constructor(valueType: Type|null|undefined, modifiers: TypeModifier[]|null = null) {
super(modifiers);
this.valueType = valueType || null;
}
visitType(visitor: TypeVisitor, context: any): any {
return visitor.visitMapType(this, context);
}
}
export const DYNAMIC_TYPE = new BuiltinType(BuiltinTypeName.Dynamic);
export const INFERRED_TYPE = new BuiltinType(BuiltinTypeName.Inferred);
export const BOOL_TYPE = new BuiltinType(BuiltinTypeName.Bool);
export const INT_TYPE = new BuiltinType(BuiltinTypeName.Int);
export const NUMBER_TYPE = new BuiltinType(BuiltinTypeName.Number);
export const STRING_TYPE = new BuiltinType(BuiltinTypeName.String);
export const FUNCTION_TYPE = new BuiltinType(BuiltinTypeName.Function);
export const NONE_TYPE = new BuiltinType(BuiltinTypeName.None);
export interface TypeVisitor {
visitBuiltinType(type: BuiltinType, context: any): any;
visitExpressionType(type: ExpressionType, context: any): any;
visitArrayType(type: ArrayType, context: any): any;
visitMapType(type: MapType, context: any): any;
}
///// Expressions
export enum UnaryOperator {
Minus,
Plus,
}
export enum BinaryOperator {
Equals,
NotEquals,
Identical,
NotIdentical,
Minus,
Plus,
Divide,
Multiply,
Modulo,
And,
Or,
BitwiseAnd,
Lower,
LowerEquals,
Bigger,
BiggerEquals
}
export function nullSafeIsEquivalent<T extends {isEquivalent(other: T): boolean}>(
base: T|null, other: T|null) {
if (base == null || other == null) {
return base == other;
}
return base.isEquivalent(other);
}
export function areAllEquivalent<T extends {isEquivalent(other: T): boolean}>(
base: T[], other: T[]) {
const len = base.length;
if (len !== other.length) {
return false;
}
for (let i = 0; i < len; i++) {
if (!base[i].isEquivalent(other[i])) {
return false;
}
}
return true;
}
export abstract class Expression {
public type: Type|null;
public sourceSpan: ParseSourceSpan|null;
constructor(type: Type|null|undefined, sourceSpan?: ParseSourceSpan|null) {
this.type = type || null;
this.sourceSpan = sourceSpan || null;
}
abstract visitExpression(visitor: ExpressionVisitor, context: any): any;
/**
* Calculates whether this expression produces the same value as the given expression.
* Note: We don't check Types nor ParseSourceSpans nor function arguments.
*/
abstract isEquivalent(e: Expression): boolean;
/**
* Return true if the expression is constant.
*/
abstract isConstant(): boolean;
prop(name: string, sourceSpan?: ParseSourceSpan|null): ReadPropExpr {
return new ReadPropExpr(this, name, null, sourceSpan);
}
key(index: Expression, type?: Type|null, sourceSpan?: ParseSourceSpan|null): ReadKeyExpr {
return new ReadKeyExpr(this, index, type, sourceSpan);
}
callMethod(name: string|BuiltinMethod, params: Expression[], sourceSpan?: ParseSourceSpan|null):
InvokeMethodExpr {
return new InvokeMethodExpr(this, name, params, null, sourceSpan);
}
callFn(params: Expression[], sourceSpan?: ParseSourceSpan|null, pure?: boolean):
InvokeFunctionExpr {
return new InvokeFunctionExpr(this, params, null, sourceSpan, pure);
}
instantiate(params: Expression[], type?: Type|null, sourceSpan?: ParseSourceSpan|null):
InstantiateExpr {
return new InstantiateExpr(this, params, type, sourceSpan);
}
conditional(
trueCase: Expression, falseCase: Expression|null = null,
sourceSpan?: ParseSourceSpan|null): ConditionalExpr {
return new ConditionalExpr(this, trueCase, falseCase, null, sourceSpan);
}
equals(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Equals, this, rhs, null, sourceSpan);
}
notEquals(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.NotEquals, this, rhs, null, sourceSpan);
}
identical(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Identical, this, rhs, null, sourceSpan);
}
notIdentical(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.NotIdentical, this, rhs, null, sourceSpan);
}
minus(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Minus, this, rhs, null, sourceSpan);
}
plus(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Plus, this, rhs, null, sourceSpan);
}
divide(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Divide, this, rhs, null, sourceSpan);
}
multiply(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Multiply, this, rhs, null, sourceSpan);
}
modulo(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Modulo, this, rhs, null, sourceSpan);
}
and(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.And, this, rhs, null, sourceSpan);
}
bitwiseAnd(rhs: Expression, sourceSpan?: ParseSourceSpan|null, parens: boolean = true):
BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.BitwiseAnd, this, rhs, null, sourceSpan, parens);
}
or(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Or, this, rhs, null, sourceSpan);
}
lower(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Lower, this, rhs, null, sourceSpan);
}
lowerEquals(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.LowerEquals, this, rhs, null, sourceSpan);
}
bigger(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.Bigger, this, rhs, null, sourceSpan);
}
biggerEquals(rhs: Expression, sourceSpan?: ParseSourceSpan|null): BinaryOperatorExpr {
return new BinaryOperatorExpr(BinaryOperator.BiggerEquals, this, rhs, null, sourceSpan);
}
isBlank(sourceSpan?: ParseSourceSpan|null): Expression {
// Note: We use equals by purpose here to compare to null and undefined in JS.
// We use the typed null to allow strictNullChecks to narrow types.
return this.equals(TYPED_NULL_EXPR, sourceSpan);
}
cast(type: Type, sourceSpan?: ParseSourceSpan|null): Expression {
return new CastExpr(this, type, sourceSpan);
}
toStmt(): Statement {
return new ExpressionStatement(this, null);
}
}
export enum BuiltinVar {
This,
Super,
CatchError,
CatchStack
}
export class ReadVarExpr extends Expression {
public name: string|null;
public builtin: BuiltinVar|null;
constructor(name: string|BuiltinVar, type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
if (typeof name === 'string') {
this.name = name;
this.builtin = null;
} else {
this.name = null;
this.builtin = name;
}
}
isEquivalent(e: Expression): boolean {
return e instanceof ReadVarExpr && this.name === e.name && this.builtin === e.builtin;
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitReadVarExpr(this, context);
}
set(value: Expression): WriteVarExpr {
if (!this.name) {
throw new Error(`Built in variable ${this.builtin} can not be assigned to.`);
}
return new WriteVarExpr(this.name, value, null, this.sourceSpan);
}
}
export class TypeofExpr extends Expression {
constructor(public expr: Expression, type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
visitExpression(visitor: ExpressionVisitor, context: any) {
return visitor.visitTypeofExpr(this, context);
}
isEquivalent(e: Expression): boolean {
return e instanceof TypeofExpr && e.expr.isEquivalent(this.expr);
}
isConstant(): boolean {
return this.expr.isConstant();
}
}
export class WrappedNodeExpr<T> extends Expression {
constructor(public node: T, type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof WrappedNodeExpr && this.node === e.node;
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitWrappedNodeExpr(this, context);
}
}
export class WriteVarExpr extends Expression {
public value: Expression;
constructor(
public name: string, value: Expression, type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type || value.type, sourceSpan);
this.value = value;
}
isEquivalent(e: Expression): boolean {
return e instanceof WriteVarExpr && this.name === e.name && this.value.isEquivalent(e.value);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitWriteVarExpr(this, context);
}
toDeclStmt(type?: Type|null, modifiers?: StmtModifier[]|null): DeclareVarStmt {
return new DeclareVarStmt(this.name, this.value, type, modifiers, this.sourceSpan);
}
toConstDecl(): DeclareVarStmt {
return this.toDeclStmt(INFERRED_TYPE, [StmtModifier.Final]);
}
}
export class WriteKeyExpr extends Expression {
public value: Expression;
constructor(
public receiver: Expression, public index: Expression, value: Expression, type?: Type|null,
sourceSpan?: ParseSourceSpan|null) {
super(type || value.type, sourceSpan);
this.value = value;
}
isEquivalent(e: Expression): boolean {
return e instanceof WriteKeyExpr && this.receiver.isEquivalent(e.receiver) &&
this.index.isEquivalent(e.index) && this.value.isEquivalent(e.value);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitWriteKeyExpr(this, context);
}
}
export class WritePropExpr extends Expression {
public value: Expression;
constructor(
public receiver: Expression, public name: string, value: Expression, type?: Type|null,
sourceSpan?: ParseSourceSpan|null) {
super(type || value.type, sourceSpan);
this.value = value;
}
isEquivalent(e: Expression): boolean {
return e instanceof WritePropExpr && this.receiver.isEquivalent(e.receiver) &&
this.name === e.name && this.value.isEquivalent(e.value);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitWritePropExpr(this, context);
}
}
export enum BuiltinMethod {
ConcatArray,
SubscribeObservable,
Bind
}
export class InvokeMethodExpr extends Expression {
public name: string|null;
public builtin: BuiltinMethod|null;
constructor(
public receiver: Expression, method: string|BuiltinMethod, public args: Expression[],
type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
if (typeof method === 'string') {
this.name = method;
this.builtin = null;
} else {
this.name = null;
this.builtin = <BuiltinMethod>method;
}
}
isEquivalent(e: Expression): boolean {
return e instanceof InvokeMethodExpr && this.receiver.isEquivalent(e.receiver) &&
this.name === e.name && this.builtin === e.builtin && areAllEquivalent(this.args, e.args);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitInvokeMethodExpr(this, context);
}
}
export class InvokeFunctionExpr extends Expression {
constructor(
public fn: Expression, public args: Expression[], type?: Type|null,
sourceSpan?: ParseSourceSpan|null, public pure = false) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof InvokeFunctionExpr && this.fn.isEquivalent(e.fn) &&
areAllEquivalent(this.args, e.args) && this.pure === e.pure;
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitInvokeFunctionExpr(this, context);
}
}
export class InstantiateExpr extends Expression {
constructor(
public classExpr: Expression, public args: Expression[], type?: Type|null,
sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof InstantiateExpr && this.classExpr.isEquivalent(e.classExpr) &&
areAllEquivalent(this.args, e.args);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitInstantiateExpr(this, context);
}
}
export class LiteralExpr extends Expression {
constructor(
public value: number|string|boolean|null|undefined, type?: Type|null,
sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof LiteralExpr && this.value === e.value;
}
isConstant() {
return true;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitLiteralExpr(this, context);
}
}
export abstract class MessagePiece {
constructor(public text: string, public sourceSpan: ParseSourceSpan) {}
}
export class LiteralPiece extends MessagePiece {}
export class PlaceholderPiece extends MessagePiece {}
export class LocalizedString extends Expression {
constructor(
readonly metaBlock: I18nMeta, readonly messageParts: LiteralPiece[],
readonly placeHolderNames: PlaceholderPiece[], readonly expressions: Expression[],
sourceSpan?: ParseSourceSpan|null) {
super(STRING_TYPE, sourceSpan);
}
isEquivalent(e: Expression): boolean {
// return e instanceof LocalizedString && this.message === e.message;
return false;
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitLocalizedString(this, context);
}
/**
* Serialize the given `meta` and `messagePart` into "cooked" and "raw" strings that can be used
* in a `$localize` tagged string. The format of the metadata is the same as that parsed by
* `parseI18nMeta()`.
*
* @param meta The metadata to serialize
* @param messagePart The first part of the tagged string
*/
serializeI18nHead(): {cooked: string, raw: string} {
const MEANING_SEPARATOR = '|';
const ID_SEPARATOR = '@@';
const LEGACY_ID_INDICATOR = 'β';
let metaBlock = this.metaBlock.description || '';
if (this.metaBlock.meaning) {
metaBlock = `${this.metaBlock.meaning}${MEANING_SEPARATOR}${metaBlock}`;
}
if (this.metaBlock.customId) {
metaBlock = `${metaBlock}${ID_SEPARATOR}${this.metaBlock.customId}`;
}
if (this.metaBlock.legacyIds) {
this.metaBlock.legacyIds.forEach(legacyId => {
metaBlock = `${metaBlock}${LEGACY_ID_INDICATOR}${legacyId}`;
});
}
return createCookedRawString(metaBlock, this.messageParts[0].text);
}
getMessagePartSourceSpan(i: number): ParseSourceSpan|null {
return this.messageParts[i]?.sourceSpan ?? this.sourceSpan;
}
getPlaceholderSourceSpan(i: number): ParseSourceSpan {
return this.placeHolderNames[i]?.sourceSpan ?? this.expressions[i]?.sourceSpan ??
this.sourceSpan;
}
/**
* Serialize the given `placeholderName` and `messagePart` into "cooked" and "raw" strings that
* can be used in a `$localize` tagged string.
*
* @param placeholderName The placeholder name to serialize
* @param messagePart The following message string after this placeholder
*/
serializeI18nTemplatePart(partIndex: number): {cooked: string, raw: string} {
const placeholderName = this.placeHolderNames[partIndex - 1].text;
const messagePart = this.messageParts[partIndex];
return createCookedRawString(placeholderName, messagePart.text);
}
}
const escapeSlashes = (str: string): string => str.replace(/\\/g, '\\\\');
const escapeStartingColon = (str: string): string => str.replace(/^:/, '\\:');
const escapeColons = (str: string): string => str.replace(/:/g, '\\:');
const escapeForMessagePart = (str: string): string =>
str.replace(/`/g, '\\`').replace(/\${/g, '$\\{');
/**
* Creates a `{cooked, raw}` object from the `metaBlock` and `messagePart`.
*
* The `raw` text must have various character sequences escaped:
* * "\" would otherwise indicate that the next character is a control character.
* * "`" and "${" are template string control sequences that would otherwise prematurely indicate
* the end of a message part.
* * ":" inside a metablock would prematurely indicate the end of the metablock.
* * ":" at the start of a messagePart with no metablock would erroneously indicate the start of a
* metablock.
*
* @param metaBlock Any metadata that should be prepended to the string
* @param messagePart The message part of the string
*/
function createCookedRawString(metaBlock: string, messagePart: string) {
if (metaBlock === '') {
return {
cooked: messagePart,
raw: escapeForMessagePart(escapeStartingColon(escapeSlashes(messagePart)))
};
} else {
return {
cooked: `:${metaBlock}:${messagePart}`,
raw: escapeForMessagePart(
`:${escapeColons(escapeSlashes(metaBlock))}:${escapeSlashes(messagePart)}`)
};
}
}
export class ExternalExpr extends Expression {
constructor(
public value: ExternalReference, type?: Type|null, public typeParams: Type[]|null = null,
sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof ExternalExpr && this.value.name === e.value.name &&
this.value.moduleName === e.value.moduleName && this.value.runtime === e.value.runtime;
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitExternalExpr(this, context);
}
}
export class ExternalReference {
constructor(public moduleName: string|null, public name: string|null, public runtime?: any|null) {
}
// Note: no isEquivalent method here as we use this as an interface too.
}
export class ConditionalExpr extends Expression {
public trueCase: Expression;
constructor(
public condition: Expression, trueCase: Expression, public falseCase: Expression|null = null,
type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type || trueCase.type, sourceSpan);
this.trueCase = trueCase;
}
isEquivalent(e: Expression): boolean {
return e instanceof ConditionalExpr && this.condition.isEquivalent(e.condition) &&
this.trueCase.isEquivalent(e.trueCase) && nullSafeIsEquivalent(this.falseCase, e.falseCase);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitConditionalExpr(this, context);
}
}
export class NotExpr extends Expression {
constructor(public condition: Expression, sourceSpan?: ParseSourceSpan|null) {
super(BOOL_TYPE, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof NotExpr && this.condition.isEquivalent(e.condition);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitNotExpr(this, context);
}
}
export class AssertNotNull extends Expression {
constructor(public condition: Expression, sourceSpan?: ParseSourceSpan|null) {
super(condition.type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof AssertNotNull && this.condition.isEquivalent(e.condition);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitAssertNotNullExpr(this, context);
}
}
export class CastExpr extends Expression {
constructor(public value: Expression, type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof CastExpr && this.value.isEquivalent(e.value);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitCastExpr(this, context);
}
}
export class FnParam {
constructor(public name: string, public type: Type|null = null) {}
isEquivalent(param: FnParam): boolean {
return this.name === param.name;
}
}
export class FunctionExpr extends Expression {
constructor(
public params: FnParam[], public statements: Statement[], type?: Type|null,
sourceSpan?: ParseSourceSpan|null, public name?: string|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof FunctionExpr && areAllEquivalent(this.params, e.params) &&
areAllEquivalent(this.statements, e.statements);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitFunctionExpr(this, context);
}
toDeclStmt(name: string, modifiers: StmtModifier[]|null = null): DeclareFunctionStmt {
return new DeclareFunctionStmt(
name, this.params, this.statements, this.type, modifiers, this.sourceSpan);
}
}
export class UnaryOperatorExpr extends Expression {
constructor(
public operator: UnaryOperator, public expr: Expression, type?: Type|null,
sourceSpan?: ParseSourceSpan|null, public parens: boolean = true) {
super(type || NUMBER_TYPE, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof UnaryOperatorExpr && this.operator === e.operator &&
this.expr.isEquivalent(e.expr);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitUnaryOperatorExpr(this, context);
}
}
export class BinaryOperatorExpr extends Expression {
public lhs: Expression;
constructor(
public operator: BinaryOperator, lhs: Expression, public rhs: Expression, type?: Type|null,
sourceSpan?: ParseSourceSpan|null, public parens: boolean = true) {
super(type || lhs.type, sourceSpan);
this.lhs = lhs;
}
isEquivalent(e: Expression): boolean {
return e instanceof BinaryOperatorExpr && this.operator === e.operator &&
this.lhs.isEquivalent(e.lhs) && this.rhs.isEquivalent(e.rhs);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitBinaryOperatorExpr(this, context);
}
}
export class ReadPropExpr extends Expression {
constructor(
public receiver: Expression, public name: string, type?: Type|null,
sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof ReadPropExpr && this.receiver.isEquivalent(e.receiver) &&
this.name === e.name;
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitReadPropExpr(this, context);
}
set(value: Expression): WritePropExpr {
return new WritePropExpr(this.receiver, this.name, value, null, this.sourceSpan);
}
}
export class ReadKeyExpr extends Expression {
constructor(
public receiver: Expression, public index: Expression, type?: Type|null,
sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof ReadKeyExpr && this.receiver.isEquivalent(e.receiver) &&
this.index.isEquivalent(e.index);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitReadKeyExpr(this, context);
}
set(value: Expression): WriteKeyExpr {
return new WriteKeyExpr(this.receiver, this.index, value, null, this.sourceSpan);
}
}
export class LiteralArrayExpr extends Expression {
public entries: Expression[];
constructor(entries: Expression[], type?: Type|null, sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
this.entries = entries;
}
isConstant() {
return this.entries.every(e => e.isConstant());
}
isEquivalent(e: Expression): boolean {
return e instanceof LiteralArrayExpr && areAllEquivalent(this.entries, e.entries);
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitLiteralArrayExpr(this, context);
}
}
export class LiteralMapEntry {
constructor(public key: string, public value: Expression, public quoted: boolean) {}
isEquivalent(e: LiteralMapEntry): boolean {
return this.key === e.key && this.value.isEquivalent(e.value);
}
}
export class LiteralMapExpr extends Expression {
public valueType: Type|null = null;
constructor(
public entries: LiteralMapEntry[], type?: MapType|null, sourceSpan?: ParseSourceSpan|null) {
super(type, sourceSpan);
if (type) {
this.valueType = type.valueType;
}
}
isEquivalent(e: Expression): boolean {
return e instanceof LiteralMapExpr && areAllEquivalent(this.entries, e.entries);
}
isConstant() {
return this.entries.every(e => e.value.isConstant());
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitLiteralMapExpr(this, context);
}
}
export class CommaExpr extends Expression {
constructor(public parts: Expression[], sourceSpan?: ParseSourceSpan|null) {
super(parts[parts.length - 1].type, sourceSpan);
}
isEquivalent(e: Expression): boolean {
return e instanceof CommaExpr && areAllEquivalent(this.parts, e.parts);
}
isConstant() {
return false;
}
visitExpression(visitor: ExpressionVisitor, context: any): any {
return visitor.visitCommaExpr(this, context);
}
}
export interface ExpressionVisitor {
visitReadVarExpr(ast: ReadVarExpr, context: any): any;
visitWriteVarExpr(expr: WriteVarExpr, context: any): any;
visitWriteKeyExpr(expr: WriteKeyExpr, context: any): any;
visitWritePropExpr(expr: WritePropExpr, context: any): any;
visitInvokeMethodExpr(ast: InvokeMethodExpr, context: any): any;
visitInvokeFunctionExpr(ast: InvokeFunctionExpr, context: any): any;
visitInstantiateExpr(ast: InstantiateExpr, context: any): any;
visitLiteralExpr(ast: LiteralExpr, context: any): any;
visitLocalizedString(ast: LocalizedString, context: any): any;
visitExternalExpr(ast: ExternalExpr, context: any): any;
visitConditionalExpr(ast: ConditionalExpr, context: any): any;
visitNotExpr(ast: NotExpr, context: any): any;
visitAssertNotNullExpr(ast: AssertNotNull, context: any): any;
visitCastExpr(ast: CastExpr, context: any): any;
visitFunctionExpr(ast: FunctionExpr, context: any): any;
visitUnaryOperatorExpr(ast: UnaryOperatorExpr, context: any): any;
visitBinaryOperatorExpr(ast: BinaryOperatorExpr, context: any): any;
visitReadPropExpr(ast: ReadPropExpr, context: any): any;
visitReadKeyExpr(ast: ReadKeyExpr, context: any): any;
visitLiteralArrayExpr(ast: LiteralArrayExpr, context: any): any;
visitLiteralMapExpr(ast: LiteralMapExpr, context: any): any;
visitCommaExpr(ast: CommaExpr, context: any): any;
visitWrappedNodeExpr(ast: WrappedNodeExpr<any>, context: any): any;
visitTypeofExpr(ast: TypeofExpr, context: any): any;
}
export const THIS_EXPR = new ReadVarExpr(BuiltinVar.This, null, null);
export const SUPER_EXPR = new ReadVarExpr(BuiltinVar.Super, null, null);
export const CATCH_ERROR_VAR = new ReadVarExpr(BuiltinVar.CatchError, null, null);
export const CATCH_STACK_VAR = new ReadVarExpr(BuiltinVar.CatchStack, null, null);
export const NULL_EXPR = new LiteralExpr(null, null, null);
export const TYPED_NULL_EXPR = new LiteralExpr(null, INFERRED_TYPE, null);
//// Statements
export enum StmtModifier {
Final,
Private,
Exported,
Static,
}
export abstract class Statement {
public modifiers: StmtModifier[];
public sourceSpan: ParseSourceSpan|null;
constructor(modifiers?: StmtModifier[]|null, sourceSpan?: ParseSourceSpan|null) {
this.modifiers = modifiers || [];
this.sourceSpan = sourceSpan || null;
}
/**
* Calculates whether this statement produces the same value as the given statement.
* Note: We don't check Types nor ParseSourceSpans nor function arguments.
*/
abstract isEquivalent(stmt: Statement): boolean;
abstract visitStatement(visitor: StatementVisitor, context: any): any;
hasModifier(modifier: StmtModifier): boolean {
return this.modifiers!.indexOf(modifier) !== -1;
}
}