source: trip-planner-front/node_modules/@angular/compiler/src/expression_parser/parser.d.ts@ 76712b2

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1/**
2 * @license
3 * Copyright Google LLC All Rights Reserved.
4 *
5 * Use of this source code is governed by an MIT-style license that can be
6 * found in the LICENSE file at https://angular.io/license
7 */
8import { InterpolationConfig } from '../ml_parser/interpolation_config';
9import { AbsoluteSourceSpan, AST, AstVisitor, ASTWithSource, Binary, BindingPipe, Chain, Conditional, FunctionCall, ImplicitReceiver, Interpolation, KeyedRead, KeyedWrite, LiteralArray, LiteralMap, LiteralPrimitive, MethodCall, NonNullAssert, ParserError, ParseSpan, PrefixNot, PropertyRead, PropertyWrite, Quote, RecursiveAstVisitor, SafeKeyedRead, SafeMethodCall, SafePropertyRead, TemplateBinding, TemplateBindingIdentifier, ThisReceiver, Unary } from './ast';
10import { Lexer, Token } from './lexer';
11export interface InterpolationPiece {
12 text: string;
13 start: number;
14 end: number;
15}
16export declare class SplitInterpolation {
17 strings: InterpolationPiece[];
18 expressions: InterpolationPiece[];
19 offsets: number[];
20 constructor(strings: InterpolationPiece[], expressions: InterpolationPiece[], offsets: number[]);
21}
22export declare class TemplateBindingParseResult {
23 templateBindings: TemplateBinding[];
24 warnings: string[];
25 errors: ParserError[];
26 constructor(templateBindings: TemplateBinding[], warnings: string[], errors: ParserError[]);
27}
28export declare class Parser {
29 private _lexer;
30 private errors;
31 constructor(_lexer: Lexer);
32 simpleExpressionChecker: typeof SimpleExpressionChecker;
33 parseAction(input: string, location: string, absoluteOffset: number, interpolationConfig?: InterpolationConfig): ASTWithSource;
34 parseBinding(input: string, location: string, absoluteOffset: number, interpolationConfig?: InterpolationConfig): ASTWithSource;
35 private checkSimpleExpression;
36 parseSimpleBinding(input: string, location: string, absoluteOffset: number, interpolationConfig?: InterpolationConfig): ASTWithSource;
37 private _reportError;
38 private _parseBindingAst;
39 private _parseQuote;
40 /**
41 * Parse microsyntax template expression and return a list of bindings or
42 * parsing errors in case the given expression is invalid.
43 *
44 * For example,
45 * ```
46 * <div *ngFor="let item of items">
47 * ^ ^ absoluteValueOffset for `templateValue`
48 * absoluteKeyOffset for `templateKey`
49 * ```
50 * contains three bindings:
51 * 1. ngFor -> null
52 * 2. item -> NgForOfContext.$implicit
53 * 3. ngForOf -> items
54 *
55 * This is apparent from the de-sugared template:
56 * ```
57 * <ng-template ngFor let-item [ngForOf]="items">
58 * ```
59 *
60 * @param templateKey name of directive, without the * prefix. For example: ngIf, ngFor
61 * @param templateValue RHS of the microsyntax attribute
62 * @param templateUrl template filename if it's external, component filename if it's inline
63 * @param absoluteKeyOffset start of the `templateKey`
64 * @param absoluteValueOffset start of the `templateValue`
65 */
66 parseTemplateBindings(templateKey: string, templateValue: string, templateUrl: string, absoluteKeyOffset: number, absoluteValueOffset: number): TemplateBindingParseResult;
67 parseInterpolation(input: string, location: string, absoluteOffset: number, interpolationConfig?: InterpolationConfig): ASTWithSource | null;
68 /**
69 * Similar to `parseInterpolation`, but treats the provided string as a single expression
70 * element that would normally appear within the interpolation prefix and suffix (`{{` and `}}`).
71 * This is used for parsing the switch expression in ICUs.
72 */
73 parseInterpolationExpression(expression: string, location: string, absoluteOffset: number): ASTWithSource;
74 private createInterpolationAst;
75 /**
76 * Splits a string of text into "raw" text segments and expressions present in interpolations in
77 * the string.
78 * Returns `null` if there are no interpolations, otherwise a
79 * `SplitInterpolation` with splits that look like
80 * <raw text> <expression> <raw text> ... <raw text> <expression> <raw text>
81 */
82 splitInterpolation(input: string, location: string, interpolationConfig?: InterpolationConfig): SplitInterpolation;
83 wrapLiteralPrimitive(input: string | null, location: string, absoluteOffset: number): ASTWithSource;
84 private _stripComments;
85 private _commentStart;
86 private _checkNoInterpolation;
87 /**
88 * Finds the index of the end of an interpolation expression
89 * while ignoring comments and quoted content.
90 */
91 private _getInterpolationEndIndex;
92 /**
93 * Generator used to iterate over the character indexes of a string that are outside of quotes.
94 * @param input String to loop through.
95 * @param start Index within the string at which to start.
96 */
97 private _forEachUnquotedChar;
98}
99export declare class IvyParser extends Parser {
100 simpleExpressionChecker: typeof IvySimpleExpressionChecker;
101}
102export declare class _ParseAST {
103 input: string;
104 location: string;
105 absoluteOffset: number;
106 tokens: Token[];
107 inputLength: number;
108 parseAction: boolean;
109 private errors;
110 private offset;
111 private rparensExpected;
112 private rbracketsExpected;
113 private rbracesExpected;
114 private context;
115 private sourceSpanCache;
116 index: number;
117 constructor(input: string, location: string, absoluteOffset: number, tokens: Token[], inputLength: number, parseAction: boolean, errors: ParserError[], offset: number);
118 peek(offset: number): Token;
119 get next(): Token;
120 /** Whether all the parser input has been processed. */
121 get atEOF(): boolean;
122 /**
123 * Index of the next token to be processed, or the end of the last token if all have been
124 * processed.
125 */
126 get inputIndex(): number;
127 /**
128 * End index of the last processed token, or the start of the first token if none have been
129 * processed.
130 */
131 get currentEndIndex(): number;
132 /**
133 * Returns the absolute offset of the start of the current token.
134 */
135 get currentAbsoluteOffset(): number;
136 /**
137 * Retrieve a `ParseSpan` from `start` to the current position (or to `artificialEndIndex` if
138 * provided).
139 *
140 * @param start Position from which the `ParseSpan` will start.
141 * @param artificialEndIndex Optional ending index to be used if provided (and if greater than the
142 * natural ending index)
143 */
144 span(start: number, artificialEndIndex?: number): ParseSpan;
145 sourceSpan(start: number, artificialEndIndex?: number): AbsoluteSourceSpan;
146 advance(): void;
147 /**
148 * Executes a callback in the provided context.
149 */
150 private withContext;
151 consumeOptionalCharacter(code: number): boolean;
152 peekKeywordLet(): boolean;
153 peekKeywordAs(): boolean;
154 /**
155 * Consumes an expected character, otherwise emits an error about the missing expected character
156 * and skips over the token stream until reaching a recoverable point.
157 *
158 * See `this.error` and `this.skip` for more details.
159 */
160 expectCharacter(code: number): void;
161 consumeOptionalOperator(op: string): boolean;
162 expectOperator(operator: string): void;
163 prettyPrintToken(tok: Token): string;
164 expectIdentifierOrKeyword(): string | null;
165 expectIdentifierOrKeywordOrString(): string;
166 parseChain(): AST;
167 parsePipe(): AST;
168 parseExpression(): AST;
169 parseConditional(): AST;
170 parseLogicalOr(): AST;
171 parseLogicalAnd(): AST;
172 parseNullishCoalescing(): AST;
173 parseEquality(): AST;
174 parseRelational(): AST;
175 parseAdditive(): AST;
176 parseMultiplicative(): AST;
177 parsePrefix(): AST;
178 parseCallChain(): AST;
179 parsePrimary(): AST;
180 parseExpressionList(terminator: number): AST[];
181 parseLiteralMap(): LiteralMap;
182 parseAccessMemberOrMethodCall(receiver: AST, start: number, isSafe: boolean): AST;
183 parseCallArguments(): BindingPipe[];
184 /**
185 * Parses an identifier, a keyword, a string with an optional `-` in between,
186 * and returns the string along with its absolute source span.
187 */
188 expectTemplateBindingKey(): TemplateBindingIdentifier;
189 /**
190 * Parse microsyntax template expression and return a list of bindings or
191 * parsing errors in case the given expression is invalid.
192 *
193 * For example,
194 * ```
195 * <div *ngFor="let item of items; index as i; trackBy: func">
196 * ```
197 * contains five bindings:
198 * 1. ngFor -> null
199 * 2. item -> NgForOfContext.$implicit
200 * 3. ngForOf -> items
201 * 4. i -> NgForOfContext.index
202 * 5. ngForTrackBy -> func
203 *
204 * For a full description of the microsyntax grammar, see
205 * https://gist.github.com/mhevery/d3530294cff2e4a1b3fe15ff75d08855
206 *
207 * @param templateKey name of the microsyntax directive, like ngIf, ngFor,
208 * without the *, along with its absolute span.
209 */
210 parseTemplateBindings(templateKey: TemplateBindingIdentifier): TemplateBindingParseResult;
211 parseKeyedReadOrWrite(receiver: AST, start: number, isSafe: boolean): AST;
212 /**
213 * Parse a directive keyword, followed by a mandatory expression.
214 * For example, "of items", "trackBy: func".
215 * The bindings are: ngForOf -> items, ngForTrackBy -> func
216 * There could be an optional "as" binding that follows the expression.
217 * For example,
218 * ```
219 * *ngFor="let item of items | slice:0:1 as collection".
220 * ^^ ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^
221 * keyword bound target optional 'as' binding
222 * ```
223 *
224 * @param key binding key, for example, ngFor, ngIf, ngForOf, along with its
225 * absolute span.
226 */
227 private parseDirectiveKeywordBindings;
228 /**
229 * Return the expression AST for the bound target of a directive keyword
230 * binding. For example,
231 * ```
232 * *ngIf="condition | pipe"
233 * ^^^^^^^^^^^^^^^^ bound target for "ngIf"
234 * *ngFor="let item of items"
235 * ^^^^^ bound target for "ngForOf"
236 * ```
237 */
238 private getDirectiveBoundTarget;
239 /**
240 * Return the binding for a variable declared using `as`. Note that the order
241 * of the key-value pair in this declaration is reversed. For example,
242 * ```
243 * *ngFor="let item of items; index as i"
244 * ^^^^^ ^
245 * value key
246 * ```
247 *
248 * @param value name of the value in the declaration, "ngIf" in the example
249 * above, along with its absolute span.
250 */
251 private parseAsBinding;
252 /**
253 * Return the binding for a variable declared using `let`. For example,
254 * ```
255 * *ngFor="let item of items; let i=index;"
256 * ^^^^^^^^ ^^^^^^^^^^^
257 * ```
258 * In the first binding, `item` is bound to `NgForOfContext.$implicit`.
259 * In the second binding, `i` is bound to `NgForOfContext.index`.
260 */
261 private parseLetBinding;
262 /**
263 * Consume the optional statement terminator: semicolon or comma.
264 */
265 private consumeStatementTerminator;
266 /**
267 * Records an error and skips over the token stream until reaching a recoverable point. See
268 * `this.skip` for more details on token skipping.
269 */
270 error(message: string, index?: number | null): void;
271 private locationText;
272 /**
273 * Records an error for an unexpected private identifier being discovered.
274 * @param token Token representing a private identifier.
275 * @param extraMessage Optional additional message being appended to the error.
276 */
277 private _reportErrorForPrivateIdentifier;
278 /**
279 * Error recovery should skip tokens until it encounters a recovery point.
280 *
281 * The following are treated as unconditional recovery points:
282 * - end of input
283 * - ';' (parseChain() is always the root production, and it expects a ';')
284 * - '|' (since pipes may be chained and each pipe expression may be treated independently)
285 *
286 * The following are conditional recovery points:
287 * - ')', '}', ']' if one of calling productions is expecting one of these symbols
288 * - This allows skip() to recover from errors such as '(a.) + 1' allowing more of the AST to
289 * be retained (it doesn't skip any tokens as the ')' is retained because of the '(' begins
290 * an '(' <expr> ')' production).
291 * The recovery points of grouping symbols must be conditional as they must be skipped if
292 * none of the calling productions are not expecting the closing token else we will never
293 * make progress in the case of an extraneous group closing symbol (such as a stray ')').
294 * That is, we skip a closing symbol if we are not in a grouping production.
295 * - '=' in a `Writable` context
296 * - In this context, we are able to recover after seeing the `=` operator, which
297 * signals the presence of an independent rvalue expression following the `=` operator.
298 *
299 * If a production expects one of these token it increments the corresponding nesting count,
300 * and then decrements it just prior to checking if the token is in the input.
301 */
302 private skip;
303}
304declare class SimpleExpressionChecker implements AstVisitor {
305 errors: string[];
306 visitImplicitReceiver(ast: ImplicitReceiver, context: any): void;
307 visitThisReceiver(ast: ThisReceiver, context: any): void;
308 visitInterpolation(ast: Interpolation, context: any): void;
309 visitLiteralPrimitive(ast: LiteralPrimitive, context: any): void;
310 visitPropertyRead(ast: PropertyRead, context: any): void;
311 visitPropertyWrite(ast: PropertyWrite, context: any): void;
312 visitSafePropertyRead(ast: SafePropertyRead, context: any): void;
313 visitMethodCall(ast: MethodCall, context: any): void;
314 visitSafeMethodCall(ast: SafeMethodCall, context: any): void;
315 visitFunctionCall(ast: FunctionCall, context: any): void;
316 visitLiteralArray(ast: LiteralArray, context: any): void;
317 visitLiteralMap(ast: LiteralMap, context: any): void;
318 visitUnary(ast: Unary, context: any): void;
319 visitBinary(ast: Binary, context: any): void;
320 visitPrefixNot(ast: PrefixNot, context: any): void;
321 visitNonNullAssert(ast: NonNullAssert, context: any): void;
322 visitConditional(ast: Conditional, context: any): void;
323 visitPipe(ast: BindingPipe, context: any): void;
324 visitKeyedRead(ast: KeyedRead, context: any): void;
325 visitKeyedWrite(ast: KeyedWrite, context: any): void;
326 visitAll(asts: any[], context: any): any[];
327 visitChain(ast: Chain, context: any): void;
328 visitQuote(ast: Quote, context: any): void;
329 visitSafeKeyedRead(ast: SafeKeyedRead, context: any): void;
330}
331/**
332 * This class implements SimpleExpressionChecker used in View Engine and performs more strict checks
333 * to make sure host bindings do not contain pipes. In View Engine, having pipes in host bindings is
334 * not supported as well, but in some cases (like `!(value | async)`) the error is not triggered at
335 * compile time. In order to preserve View Engine behavior, more strict checks are introduced for
336 * Ivy mode only.
337 */
338declare class IvySimpleExpressionChecker extends RecursiveAstVisitor implements SimpleExpressionChecker {
339 errors: string[];
340 visitPipe(): void;
341}
342export {};
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