/// <summary>
/// Check if <paramref name="candidate"/> is <paramref name="symbol"/>.
/// Optimized so that the stuff that can be checked in syntax mode is done before calling get symbol.
/// </summary>
/// <param name="candidate">The <see cref="IdentifierNameSyntax"/>.</param>
/// <param name="symbol">The <see cref="QualifiedMethod"/>.</param>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <returns>True if <paramref name="candidate"/> is <paramref name="symbol"/>.</returns>
public static bool IsSymbol(this IdentifierNameSyntax candidate, QualifiedMethod symbol, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (candidate is null)
{
throw new System.ArgumentNullException(nameof(candidate));
}
if (symbol is null)
{
throw new System.ArgumentNullException(nameof(symbol));
}
return(candidate.Identifier.ValueText == symbol.Name &&
semanticModel.TryGetSymbol(candidate, cancellationToken, out var candidateSymbol) &&
candidateSymbol == symbol);
}
/// <summary>
/// Try getting the <see cref="IMethodSymbol"/> 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="InvocationExpressionSyntax"/>.</param>
/// <param name="expected">The expected method.</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, InvocationExpressionSyntax node, QualifiedMethod expected, CancellationToken cancellationToken, out IMethodSymbol symbol)
{
symbol = null;
if (node == null)
{
return(false);
}
if (node.TryGetMethodName(out var name) &&
name != expected.Name)
{
return(false);
}
if (semanticModel.TryGetSymbol(node, cancellationToken, out var candidate) &&
candidate == expected)
{
symbol = candidate;
return(true);
}
return(false);
}
