private TStatement GetStatement(ElseClauseSyntax elseClause)
{
StatementSyntax statement = ReplaceIfWithStatementRefactoring.GetStatement(elseClause);
if (statement?.IsKind(StatementKind) == true)
{
return((TStatement)statement);
}
return(null);
}
private TStatement GetStatement(IfStatementSyntax ifStatement)
{
StatementSyntax statement = ReplaceIfWithStatementRefactoring.GetStatement(ifStatement);
if (statement?.IsKind(StatementKind) == true)
{
return((TStatement)statement);
}
return(null);
}
public static void ComputeRefactoring(RefactoringContext context, IfStatementSyntax ifStatement)
{
if (IfElseChain.IsTopmostIf(ifStatement))
{
ElseClauseSyntax elseClause = ifStatement.Else;
if (elseClause != null)
{
StatementSyntax statement1 = ReplaceIfWithStatementRefactoring.GetStatement(ifStatement);
if (statement1?.IsKind(SyntaxKind.ExpressionStatement) == true)
{
StatementSyntax statement2 = ReplaceIfWithStatementRefactoring.GetStatement(elseClause);
if (statement2?.IsKind(SyntaxKind.ExpressionStatement) == true)
{
var expressionStatement1 = (ExpressionStatementSyntax)statement1;
var expressionStatement2 = (ExpressionStatementSyntax)statement2;
ExpressionSyntax expression1 = expressionStatement1.Expression;
if (expression1?.IsKind(SyntaxKind.SimpleAssignmentExpression) == true)
{
ExpressionSyntax expression2 = expressionStatement2.Expression;
if (expression2?.IsKind(SyntaxKind.SimpleAssignmentExpression) == true)
{
var assignment1 = (AssignmentExpressionSyntax)expression1;
var assignment2 = (AssignmentExpressionSyntax)expression2;
ExpressionSyntax left1 = assignment1.Left;
ExpressionSyntax right1 = assignment1.Right;
if (left1?.IsMissing == false &&
right1?.IsMissing == false)
{
ExpressionSyntax left2 = assignment2.Left;
ExpressionSyntax right2 = assignment2.Right;
if (left2?.IsMissing == false &&
right2?.IsMissing == false &&
left1.IsEquivalentTo(left2, topLevel: false))
{
context.RegisterRefactoring(
"Replace if-else with assignment",
cancellationToken =>
{
return(RefactorAsync(
context.Document,
ifStatement,
left1,
right1,
right2,
cancellationToken));
});
}
}
}
}
}
}
}
}
}