43 lines
1.3 KiB
C#
43 lines
1.3 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using Microsoft.AspNetCore.Razor.Language.Legacy;
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namespace Microsoft.AspNetCore.Razor.Language
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{
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// Verifies recursively that a syntax tree has no gaps in terms of position/location.
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internal class SyntaxTreeVerifier : ParserVisitor
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{
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private readonly SourceLocationTracker _tracker = new SourceLocationTracker(SourceLocation.Zero);
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private SyntaxTreeVerifier()
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{
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}
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public static void Verify(RazorSyntaxTree syntaxTree)
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{
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Verify(syntaxTree.Root);
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}
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public static void Verify(Block block)
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{
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new SyntaxTreeVerifier().VisitBlock(block);
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}
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public override void VisitSpan(Span span)
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{
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var start = span.Start;
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if (!start.Equals(_tracker.CurrentLocation))
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{
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throw new InvalidOperationException($"Span starting at {span.Start} should start at {_tracker.CurrentLocation} - {span} ");
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}
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for (var i = 0; i < span.Symbols.Count; i++)
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{
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_tracker.UpdateLocation(span.Symbols[i].Content);
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}
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}
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}
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}
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