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C#: Extract binary patterns

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This commit is contained in:
Tamas Vajk
2020-11-12 11:47:25 +01:00
parent 39977e9a43
commit 4685fc0a32
12 changed files with 164 additions and 0 deletions
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28
csharp/extractor/Semmle.Extraction.CSharp/Entities/Expressions/Patterns/BinaryPattern.cs Normal file
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@@ -0,0 +1,28 @@
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Semmle.Extraction.Entities;
using Semmle.Extraction.Kinds;
namespace Semmle.Extraction.CSharp.Entities.Expressions
{
internal class BinaryPattern : Expression
{
public BinaryPattern(Context cx, BinaryPatternSyntax syntax, IExpressionParentEntity parent, int child) :
base(new ExpressionInfo(cx, null, cx.Create(syntax.GetLocation()), GetKind(syntax.OperatorToken, syntax), parent, child, false, null))
{
Pattern.Create(cx, syntax.Left, this, 0);
Pattern.Create(cx, syntax.Right, this, 1);
}
private static ExprKind GetKind(SyntaxToken operatorToken, BinaryPatternSyntax syntax)
{
return operatorToken.Kind() switch
{
SyntaxKind.AndKeyword => ExprKind.AND_PATTERN,
SyntaxKind.OrKeyword => ExprKind.OR_PATTERN,
_ => throw new InternalError(syntax, $"Operator '{operatorToken.Kind()}' is not supported in binary patterns.")
};
}
}
}

3
csharp/extractor/Semmle.Extraction.CSharp/Entities/Expressions/Patterns/Pattern.cs
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@@ -23,6 +23,9 @@ namespace Semmle.Extraction.CSharp.Entities.Expressions
case UnaryPatternSyntax unaryPattern:
return new UnaryPattern(cx, unaryPattern, parent, child);
case BinaryPatternSyntax binaryPattern:
return new BinaryPattern(cx, binaryPattern, parent, child);
case DeclarationPatternSyntax declPattern:
// Creates a single local variable declaration.
{

2
csharp/extractor/Semmle.Extraction.CSharp/Kinds/ExprKind.cs
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@@ -121,6 +121,8 @@ namespace Semmle.Extraction.Kinds
LE_PATTERN = 124,
GE_PATTERN = 125,
NOT_PATTERN = 126,
AND_PATTERN = 127,
OR_PATTERN = 128,
FUNCTION_POINTER_INVOCATION = 129,
}
}