/// <summary>
/// Get all usages of <paramref name="localOrParameter"/>.
/// </summary>
/// <param name="localOrParameter">The <see cref="LocalOrParameter"/>.</param>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/> that cancels the operation.</param>
/// <returns>A <see cref="UsagesWalker"/> for <paramref name="localOrParameter"/>.</returns>
public static UsagesWalker Borrow(LocalOrParameter localOrParameter, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (localOrParameter.TryGetScope(cancellationToken, out var scope))
{
return(Borrow(localOrParameter.Symbol, scope, semanticModel, cancellationToken));
}
return(Borrow(() => new UsagesWalker()));
}
/// <summary>
/// Get a walker that has all uses of <paramref name="localOrParameter"/>.
/// </summary>
/// <param name="localOrParameter">The <see cref="LocalOrParameter"/>.</param>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <returns>A walker that has all uses of <paramref name="localOrParameter"/>.</returns>
public static IdentifierNameWalker For(LocalOrParameter localOrParameter, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (localOrParameter.TryGetScope(cancellationToken, out var scope))
{
var walker = BorrowAndVisit(scope, () => new IdentifierNameWalker());
walker.RemoveAll(x => !IsMatch(x));
return(walker);
}
return(Borrow(() => new IdentifierNameWalker()));
bool IsMatch(IdentifierNameSyntax candidate)
{
return(candidate.IsSymbol(localOrParameter.Symbol, semanticModel, cancellationToken));
}
}
/// <summary>
/// Get a walker with all mutations for <paramref name="localOrParameter"/>.
/// </summary>
/// <param name="localOrParameter">The <see cref="LocalOrParameter"/>.</param>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <returns>A walker with all mutations for <paramref name="localOrParameter"/>.</returns>
public static MutationWalker For(LocalOrParameter localOrParameter, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (localOrParameter.TryGetScope(cancellationToken, out var node))
{
var walker = Borrow(node, SearchScope.Member, semanticModel, cancellationToken);
walker.assignments.RemoveAll(x => !IsMatch(x.Left));
walker.prefixUnaries.RemoveAll(x => !IsMatch(x.Operand));
walker.postfixUnaries.RemoveAll(x => !IsMatch(x.Operand));
walker.refOrOutArguments.RemoveAll(x => !IsMatch(x.Expression));
return(walker);
}
return(Borrow(() => new MutationWalker()));
bool IsMatch(ExpressionSyntax expression)
{
return(semanticModel.TryGetSymbol(expression, cancellationToken, out var symbol) &&
SymbolComparer.Equal(symbol, localOrParameter.Symbol));
}
}