7744e1e673
Some partial libraries have been minified, which results in boolean literals being converted to `!0` and `!1`. This commit ensures that the linker can process these values. Fixes #41655 PR Close #41747
117 lines
3.9 KiB
TypeScript
117 lines
3.9 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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/**
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* An abstraction for getting information from an AST while being agnostic to the underlying AST
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* implementation.
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*/
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export interface AstHost<TExpression> {
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/**
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* Get the name of the symbol represented by the given expression node, or `null` if it is not a
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* symbol.
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*/
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getSymbolName(node: TExpression): string|null;
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/**
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* Return `true` if the given expression is a string literal, or false otherwise.
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*/
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isStringLiteral(node: TExpression): boolean;
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/**
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* Parse the string value from the given expression, or throw if it is not a string literal.
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*/
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parseStringLiteral(str: TExpression): string;
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/**
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* Return `true` if the given expression is a numeric literal, or false otherwise.
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*/
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isNumericLiteral(node: TExpression): boolean;
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/**
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* Parse the numeric value from the given expression, or throw if it is not a numeric literal.
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*/
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parseNumericLiteral(num: TExpression): number;
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/**
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* Return `true` if the given expression can be considered a boolean literal, or false otherwise.
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*
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* Note that this should also cover the special case of some minified code where `true` and
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* `false` are replaced by `!0` and `!1` respectively.
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*/
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isBooleanLiteral(node: TExpression): boolean;
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/**
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* Parse the boolean value from the given expression, or throw if it is not a boolean literal.
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*
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* Note that this should also cover the special case of some minified code where `true` and
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* `false` are replaced by `!0` and `!1` respectively.
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*/
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parseBooleanLiteral(bool: TExpression): boolean;
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/**
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* Return `true` if the given expression is an array literal, or false otherwise.
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*/
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isArrayLiteral(node: TExpression): boolean;
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/**
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* Parse an array of expressions from the given expression, or throw if it is not an array
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* literal.
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*/
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parseArrayLiteral(array: TExpression): TExpression[];
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/**
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* Return `true` if the given expression is an object literal, or false otherwise.
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*/
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isObjectLiteral(node: TExpression): boolean;
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/**
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* Parse the given expression into a map of object property names to property expressions, or
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* throw if it is not an object literal.
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*/
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parseObjectLiteral(obj: TExpression): Map<string, TExpression>;
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/**
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* Return `true` if the given expression is a function, or false otherwise.
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*/
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isFunctionExpression(node: TExpression): boolean;
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/**
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* Compute the "value" of a function expression by parsing its body for a single `return`
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* statement, extracting the returned expression, or throw if it is not possible.
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*/
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parseReturnValue(fn: TExpression): TExpression;
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/**
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* Return true if the given expression is a call expression, or false otherwise.
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*/
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isCallExpression(node: TExpression): boolean;
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/**
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* Returns the expression that is called in the provided call expression, or throw if it is not
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* a call expression.
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*/
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parseCallee(call: TExpression): TExpression;
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/**
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* Returns the argument expressions for the provided call expression, or throw if it is not
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* a call expression.
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*/
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parseArguments(call: TExpression): TExpression[];
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/**
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* Compute the location range of the expression in the source file, to be used for source-mapping.
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*/
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getRange(node: TExpression): Range;
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}
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/**
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* The location of the start and end of an expression in the original source file.
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*/
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export interface Range {
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/** 0-based character position of the range start in the source file text. */
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startPos: number;
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/** 0-based line index of the range start in the source file text. */
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startLine: number;
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/** 0-based column position of the range start in the source file text. */
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startCol: number;
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/** 0-based character position of the range end in the source file text. */
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endPos: number;
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}
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