124 lines
4.0 KiB
TypeScript
124 lines
4.0 KiB
TypeScript
/**
|
|
* @license
|
|
* Copyright Google Inc. 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 {AST, Binary, BindingPipe, Chain, Conditional, FunctionCall, ImplicitReceiver, Interpolation, KeyedRead, KeyedWrite, LiteralArray, LiteralMap, LiteralPrimitive, MethodCall, ParseSpan, PrefixNot, PropertyRead, PropertyWrite, Quote, RecursiveAstVisitor, SafeMethodCall, SafePropertyRead} from '../../src/expression_parser/ast';
|
|
|
|
import {unparse} from './unparser';
|
|
|
|
class ASTValidator extends RecursiveAstVisitor {
|
|
private parentSpan: ParseSpan|undefined;
|
|
|
|
visit(ast: AST) {
|
|
this.parentSpan = undefined;
|
|
ast.visit(this);
|
|
}
|
|
|
|
validate(ast: AST, cb: () => void): void {
|
|
if (!inSpan(ast.span, this.parentSpan)) {
|
|
if (this.parentSpan) {
|
|
let parentSpan = this.parentSpan as ParseSpan;
|
|
throw Error(
|
|
`Invalid AST span [expected (${ast.span.start}, ${ast.span.end}) to be in (${parentSpan.start}, ${parentSpan.end}) for ${unparse(ast)}`);
|
|
} else {
|
|
throw Error(`Invalid root AST span for ${unparse(ast)}`);
|
|
}
|
|
}
|
|
const oldParent = this.parentSpan;
|
|
this.parentSpan = ast.span;
|
|
cb();
|
|
this.parentSpan = oldParent;
|
|
}
|
|
|
|
visitBinary(ast: Binary, context: any): any {
|
|
this.validate(ast, () => super.visitBinary(ast, context));
|
|
}
|
|
|
|
visitChain(ast: Chain, context: any): any {
|
|
this.validate(ast, () => super.visitChain(ast, context));
|
|
}
|
|
|
|
visitConditional(ast: Conditional, context: any): any {
|
|
this.validate(ast, () => super.visitConditional(ast, context));
|
|
}
|
|
|
|
visitFunctionCall(ast: FunctionCall, context: any): any {
|
|
this.validate(ast, () => super.visitFunctionCall(ast, context));
|
|
}
|
|
|
|
visitImplicitReceiver(ast: ImplicitReceiver, context: any): any {
|
|
this.validate(ast, () => super.visitImplicitReceiver(ast, context));
|
|
}
|
|
|
|
visitInterpolation(ast: Interpolation, context: any): any {
|
|
this.validate(ast, () => super.visitInterpolation(ast, context));
|
|
}
|
|
|
|
visitKeyedRead(ast: KeyedRead, context: any): any {
|
|
this.validate(ast, () => super.visitKeyedRead(ast, context));
|
|
}
|
|
|
|
visitKeyedWrite(ast: KeyedWrite, context: any): any {
|
|
this.validate(ast, () => super.visitKeyedWrite(ast, context));
|
|
}
|
|
|
|
visitLiteralArray(ast: LiteralArray, context: any): any {
|
|
this.validate(ast, () => super.visitLiteralArray(ast, context));
|
|
}
|
|
|
|
visitLiteralMap(ast: LiteralMap, context: any): any {
|
|
this.validate(ast, () => super.visitLiteralMap(ast, context));
|
|
}
|
|
|
|
visitLiteralPrimitive(ast: LiteralPrimitive, context: any): any {
|
|
this.validate(ast, () => super.visitLiteralPrimitive(ast, context));
|
|
}
|
|
|
|
visitMethodCall(ast: MethodCall, context: any): any {
|
|
this.validate(ast, () => super.visitMethodCall(ast, context));
|
|
}
|
|
|
|
visitPipe(ast: BindingPipe, context: any): any {
|
|
this.validate(ast, () => super.visitPipe(ast, context));
|
|
}
|
|
|
|
visitPrefixNot(ast: PrefixNot, context: any): any {
|
|
this.validate(ast, () => super.visitPrefixNot(ast, context));
|
|
}
|
|
|
|
visitPropertyRead(ast: PropertyRead, context: any): any {
|
|
this.validate(ast, () => super.visitPropertyRead(ast, context));
|
|
}
|
|
|
|
visitPropertyWrite(ast: PropertyWrite, context: any): any {
|
|
this.validate(ast, () => super.visitPropertyWrite(ast, context));
|
|
}
|
|
|
|
visitQuote(ast: Quote, context: any): any {
|
|
this.validate(ast, () => super.visitQuote(ast, context));
|
|
}
|
|
|
|
visitSafeMethodCall(ast: SafeMethodCall, context: any): any {
|
|
this.validate(ast, () => super.visitSafeMethodCall(ast, context));
|
|
}
|
|
|
|
visitSafePropertyRead(ast: SafePropertyRead, context: any): any {
|
|
this.validate(ast, () => super.visitSafePropertyRead(ast, context));
|
|
}
|
|
}
|
|
|
|
function inSpan(span: ParseSpan, parentSpan: ParseSpan | undefined): parentSpan is ParseSpan {
|
|
return !parentSpan || (span.start >= parentSpan.start && span.end <= parentSpan.end);
|
|
}
|
|
|
|
const sharedValidator = new ASTValidator();
|
|
|
|
export function validate<T extends AST>(ast: T): T {
|
|
sharedValidator.visit(ast);
|
|
return ast;
|
|
}
|