public override void VisitDiscardDesignation(DiscardDesignationSyntax node)
{
if (!PreVisit(node))
{
return;
}
base.VisitDiscardDesignation(node);
PostVisit(node);
}
/// <summary>
/// Try getting the <see cref="ILocalSymbol"/> for the node.
/// Gets the semantic model for the tree if the node is not in the tree corresponding to <paramref name="semanticModel"/>.
/// </summary>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="node">The <see cref="DiscardDesignationSyntax"/>.</param>
/// <param name="symbol">The symbol if found.</param>
/// <returns>True if a symbol was found.</returns>
public static bool TryGetSymbol(this SemanticModel semanticModel, DiscardDesignationSyntax node, [NotNullWhen(true)] out IDiscardSymbol?symbol)
{
if (semanticModel is null)
{
throw new ArgumentNullException(nameof(semanticModel));
}
if (node is null)
{
throw new ArgumentNullException(nameof(node));
}
symbol = GetDeclaredSymbolSafe(semanticModel, node);
return(symbol != null);
}
public override Evaluation VisitDiscardDesignation(DiscardDesignationSyntax node)
{
return(base.VisitDiscardDesignation(node));
}
private static BoundDiscardExpression BindDiscardExpression(
DiscardDesignationSyntax designation,
TypeSymbol declType)
{
return new BoundDiscardExpression(designation, declType);
}
public Discard(Context cx, DiscardDesignationSyntax discard, IExpressionParentEntity parent, int child) : this(cx, (CSharpSyntaxNode)discard, parent, child)
{
}
public override void VisitDiscardDesignation(DiscardDesignationSyntax node)
{
base.VisitDiscardDesignation(node);
}
public override void VisitDiscardDesignation(DiscardDesignationSyntax node)
{
throw new NotImplementedException();
}
private Doc PrintDiscardDesignationSyntax(DiscardDesignationSyntax node)
{
return(this.PrintSyntaxToken(node.UnderscoreToken));
}
private static BoundDiscardExpression BindDiscardExpression(
DiscardDesignationSyntax designation,
TypeSymbol declType)
{
return(new BoundDiscardExpression(designation, declType));
}
public static Doc Print(DiscardDesignationSyntax node)
{
return(Token.Print(node.UnderscoreToken));
}
public TameDiscardDesignationSyntax(DiscardDesignationSyntax node)
{
Node = node;
AddChildren();
}
public override void VisitDiscardDesignation(DiscardDesignationSyntax node)
{
Log(node, "Unsupported Syntax !");
}
/// <summary>
/// Same as SemanticModel.GetDeclaredSymbol but works when <paramref name="node"/> is not in the syntax tree.
/// </summary>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="node">The <see cref="VariableDesignationSyntax"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <returns>An <see cref="IDiscardSymbol"/> or null.</returns>
public static IDiscardSymbol GetDeclaredSymbolSafe(this SemanticModel semanticModel, DiscardDesignationSyntax node, CancellationToken cancellationToken)
{
if (node is null)
{
return(null);
}
// Working around https://github.com/dotnet/roslyn/issues/34031
// This is not pretty.
switch (node.Parent)
{
case DeclarationExpressionSyntax declarationExpression:
return(semanticModel.SemanticModelFor(node)
?.GetSpeculativeSymbolInfo(node.SpanStart, declarationExpression, SpeculativeBindingOption.BindAsExpression).Symbol as IDiscardSymbol);
case DeclarationPatternSyntax declarationPattern:
return(semanticModel.SemanticModelFor(node)
?.GetSpeculativeSymbolInfo(node.SpanStart, SyntaxFactory.DeclarationExpression(declarationPattern.Type, node), SpeculativeBindingOption.BindAsExpression).Symbol as IDiscardSymbol);
}
return(null);
}
/// <summary>
/// Try getting the <see cref="ILocalSymbol"/> for the node.
/// Gets the semantic model for the tree if the node is not in the tree corresponding to <paramref name="semanticModel"/>.
/// </summary>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="node">The <see cref="VariableDesignationSyntax"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <param name="symbol">The symbol if found.</param>
/// <returns>True if a symbol was found.</returns>
public static bool TryGetSymbol(this SemanticModel semanticModel, DiscardDesignationSyntax node, CancellationToken cancellationToken, out IDiscardSymbol symbol)
{
symbol = GetDeclaredSymbolSafe(semanticModel, node, cancellationToken);
return(symbol != null);
}
// // Summary: // Called when the visitor visits a DiscardDesignationSyntax node. public virtual void VisitDiscardDesignation(DiscardDesignationSyntax node);
