public static ImmutableArray <IfRefactoring> Analyze(
IfStatementSyntax ifStatement,
IfAnalysisOptions options,
SemanticModel semanticModel,
CancellationToken cancellationToken = default(CancellationToken))
{
if (!ifStatement.IsTopmostIf())
{
return(Empty);
}
ExpressionSyntax condition = ifStatement.Condition?.WalkDownParentheses();
if (condition == null)
{
return(Empty);
}
ElseClauseSyntax elseClause = ifStatement.Else;
if (elseClause != null)
{
if (!options.CheckSpanDirectives(ifStatement))
{
return(Empty);
}
StatementSyntax statement1 = ifStatement.GetSingleStatementOrDefault();
if (statement1 == null)
{
return(Empty);
}
SyntaxKind kind1 = statement1.Kind();
if (kind1.Is(
SyntaxKind.ExpressionStatement,
SyntaxKind.ReturnStatement,
SyntaxKind.YieldReturnStatement))
{
StatementSyntax statement2 = elseClause.GetSingleStatementOrDefault();
if (statement2?.Kind() == kind1)
{
switch (kind1)
{
case SyntaxKind.ExpressionStatement:
{
return(Analyze(
ifStatement,
condition,
(ExpressionStatementSyntax)statement1,
(ExpressionStatementSyntax)statement2,
options,
semanticModel,
cancellationToken));
}
case SyntaxKind.ReturnStatement:
{
return(Analyze(
ifStatement,
condition,
((ReturnStatementSyntax)statement1).Expression?.WalkDownParentheses(),
((ReturnStatementSyntax)statement2).Expression?.WalkDownParentheses(),
options,
isYield: false,
semanticModel: semanticModel,
cancellationToken: cancellationToken));
}
case SyntaxKind.YieldReturnStatement:
{
return(Analyze(
ifStatement,
condition,
((YieldStatementSyntax)statement1).Expression?.WalkDownParentheses(),
((YieldStatementSyntax)statement2).Expression?.WalkDownParentheses(),
options,
isYield: true,
semanticModel: semanticModel,
cancellationToken: cancellationToken));
}
}
}
}
}
else if (ifStatement.NextStatementOrDefault() is ReturnStatementSyntax returnStatement)
{
return(Analyze(ifStatement, returnStatement, options, semanticModel, cancellationToken));
}
return(Empty);
}
public static ImmutableArray <IfRefactoring> Analyze(
IfStatementSyntax ifStatement,
IfAnalysisOptions options,
SemanticModel semanticModel,
CancellationToken cancellationToken = default(CancellationToken))
{
if (ifStatement.IsTopmostIf())
{
ExpressionSyntax condition = ifStatement.Condition;
if (condition != null)
{
ElseClauseSyntax elseClause = ifStatement.Else;
if (elseClause != null)
{
if (options.CheckSpanDirectives(ifStatement))
{
StatementSyntax statement1 = ifStatement.GetSingleStatementOrDefault();
if (statement1 != null)
{
SyntaxKind kind1 = statement1.Kind();
if (kind1 == SyntaxKind.ExpressionStatement ||
kind1 == SyntaxKind.ReturnStatement ||
kind1 == SyntaxKind.YieldReturnStatement)
{
StatementSyntax statement2 = elseClause.GetSingleStatementOrDefault();
if (statement2?.IsKind(kind1) == true)
{
switch (kind1)
{
case SyntaxKind.ExpressionStatement:
{
return(Analyze(ifStatement, condition, (ExpressionStatementSyntax)statement1, (ExpressionStatementSyntax)statement2, semanticModel, cancellationToken, options));
}
case SyntaxKind.ReturnStatement:
{
return(Analyze(ifStatement, condition, ((ReturnStatementSyntax)statement1).Expression, ((ReturnStatementSyntax)statement2).Expression, semanticModel, cancellationToken, options, isYield: false));
}
case SyntaxKind.YieldReturnStatement:
{
return(Analyze(ifStatement, condition, ((YieldStatementSyntax)statement1).Expression, ((YieldStatementSyntax)statement2).Expression, semanticModel, cancellationToken, options, isYield: true));
}
}
}
}
}
}
}
else
{
StatementSyntax nextStatement = ifStatement.NextStatementOrDefault();
if (nextStatement?.IsKind(SyntaxKind.ReturnStatement) == true)
{
return(Analyze(ifStatement, (ReturnStatementSyntax)nextStatement, options, semanticModel, cancellationToken));
}
}
}
}
return(ImmutableArray <IfRefactoring> .Empty);
}