/// <summary>
/// Returns 'true' if a multi-line conditional was created, and thus should be
/// formatted specially.
/// </summary>
protected override async Task FixOneAsync(
Document document, Diagnostic diagnostic,
SyntaxEditor editor, CancellationToken cancellationToken)
{
var syntaxFacts = document.GetRequiredLanguageService <ISyntaxFactsService>();
var ifStatement = diagnostic.AdditionalLocations[0].FindNode(cancellationToken);
var semanticModel = await document.GetRequiredSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var ifOperation = (IConditionalOperation)semanticModel.GetOperation(ifStatement, cancellationToken) !;
if (!UseConditionalExpressionForAssignmentHelpers.TryMatchPattern(
syntaxFacts, ifOperation,
out var trueStatement, out var falseStatement,
out var trueAssignment, out var falseAssignment))
{
return;
}
var conditionalExpression = await CreateConditionalExpressionAsync(
document, ifOperation,
trueStatement, falseStatement,
trueAssignment?.Value ?? trueStatement,
falseAssignment?.Value ?? falseStatement,
trueAssignment?.IsRef == true, cancellationToken).ConfigureAwait(false);
// See if we're assigning to a variable declared directly above the if statement. If so,
// try to inline the conditional directly into the initializer for that variable.
if (TryConvertWhenAssignmentToLocalDeclaredImmediateAbove(
syntaxFacts, editor, ifOperation,
trueAssignment, falseAssignment, conditionalExpression))
{
return;
}
// If not, just replace the if-statement with a single assignment of the new
// conditional.
ConvertOnlyIfToConditionalExpression(
editor, ifOperation, (trueAssignment ?? falseAssignment) !, conditionalExpression);
}
protected override bool TryMatchPattern(IConditionalOperation ifOperation)
=> UseConditionalExpressionForAssignmentHelpers.TryMatchPattern(
GetSyntaxFacts(), ifOperation, out _, out _);
