private void AddPrecedingRelevantExpressions()
{
// If we're not the first statement in this block,
// and there's an expression or declaration statement directly above us,
// then add the expressions from that as well.
StatementSyntax previousStatement;
var block = _parentStatement as BlockSyntax;
if (block != null &&
block.CloseBraceToken == _token)
{
// If we're at the last brace of a block, use the last
// statement in the block.
previousStatement = block.Statements.LastOrDefault();
}
else
{
previousStatement = _parentStatement.GetPreviousStatement();
}
if (previousStatement != null)
{
switch (previousStatement.Kind())
{
case SyntaxKind.ExpressionStatement:
case SyntaxKind.LocalDeclarationStatement:
AddRelevantExpressions(previousStatement, _expressions, includeDeclarations: true);
break;
case SyntaxKind.DoStatement:
AddExpressionTerms((previousStatement as DoStatementSyntax).Condition, _expressions);
AddLastStatementOfConstruct(previousStatement);
break;
case SyntaxKind.ForStatement:
case SyntaxKind.ForEachStatement:
case SyntaxKind.IfStatement:
case SyntaxKind.CheckedStatement:
case SyntaxKind.UncheckedStatement:
case SyntaxKind.WhileStatement:
case SyntaxKind.LockStatement:
case SyntaxKind.SwitchStatement:
case SyntaxKind.TryStatement:
case SyntaxKind.UsingStatement:
AddRelevantExpressions(previousStatement, _expressions, includeDeclarations: false);
AddLastStatementOfConstruct(previousStatement);
break;
default:
break;
}
}
else
{
// This is the first statement of the block. Go to the nearest enclosing statement and add its expressions
var statementAncestor = _parentStatement.Ancestors().OfType<StatementSyntax>().FirstOrDefault(node => !node.IsKind(SyntaxKind.Block));
if (statementAncestor != null)
{
AddRelevantExpressions(statementAncestor, _expressions, includeDeclarations: true);
}
}
}
private void AddLastStatementOfConstruct(StatementSyntax statement)
{
if (statement == default(StatementSyntax))
{
return;
}
switch (statement.Kind())
{
case SyntaxKind.Block:
AddLastStatementOfConstruct((statement as BlockSyntax).Statements.LastOrDefault());
break;
case SyntaxKind.BreakStatement:
case SyntaxKind.ContinueStatement:
AddLastStatementOfConstruct(statement.GetPreviousStatement());
break;
case SyntaxKind.CheckedStatement:
case SyntaxKind.UncheckedStatement:
AddLastStatementOfConstruct((statement as CheckedStatementSyntax).Block);
break;
case SyntaxKind.DoStatement:
AddLastStatementOfConstruct((statement as DoStatementSyntax).Statement);
break;
case SyntaxKind.ForStatement:
AddLastStatementOfConstruct((statement as ForStatementSyntax).Statement);
break;
case SyntaxKind.ForEachStatement:
case SyntaxKind.ForEachVariableStatement:
AddLastStatementOfConstruct((statement as CommonForEachStatementSyntax).Statement);
break;
case SyntaxKind.IfStatement:
var ifStatement = statement as IfStatementSyntax;
AddLastStatementOfConstruct(ifStatement.Statement);
if (ifStatement.Else != null)
{
AddLastStatementOfConstruct(ifStatement.Else.Statement);
}
break;
case SyntaxKind.LockStatement:
AddLastStatementOfConstruct((statement as LockStatementSyntax).Statement);
break;
case SyntaxKind.SwitchStatement:
var switchStatement = statement as SwitchStatementSyntax;
foreach (var section in switchStatement.Sections)
{
AddLastStatementOfConstruct(section.Statements.LastOrDefault());
}
break;
case SyntaxKind.TryStatement:
var tryStatement = statement as TryStatementSyntax;
if (tryStatement.Finally != null)
{
AddLastStatementOfConstruct(tryStatement.Finally.Block);
}
else
{
AddLastStatementOfConstruct(tryStatement.Block);
foreach (var catchClause in tryStatement.Catches)
{
AddLastStatementOfConstruct(catchClause.Block);
}
}
break;
case SyntaxKind.UsingStatement:
AddLastStatementOfConstruct((statement as UsingStatementSyntax).Statement);
break;
case SyntaxKind.WhileStatement:
AddLastStatementOfConstruct((statement as WhileStatementSyntax).Statement);
break;
default:
AddRelevantExpressions(statement, _expressions, includeDeclarations: false);
break;
}
}
private void AddLastStatementOfConstruct(StatementSyntax statement)
{
if (statement == default(StatementSyntax))
{
return;
}
switch (statement.Kind())
{
case SyntaxKind.Block:
AddLastStatementOfConstruct((statement as BlockSyntax).Statements.LastOrDefault());
break;
case SyntaxKind.BreakStatement:
case SyntaxKind.ContinueStatement:
AddLastStatementOfConstruct(statement.GetPreviousStatement());
break;
case SyntaxKind.CheckedStatement:
case SyntaxKind.UncheckedStatement:
AddLastStatementOfConstruct((statement as CheckedStatementSyntax).Block);
break;
case SyntaxKind.DoStatement:
AddLastStatementOfConstruct((statement as DoStatementSyntax).Statement);
break;
case SyntaxKind.ForStatement:
AddLastStatementOfConstruct((statement as ForStatementSyntax).Statement);
break;
case SyntaxKind.ForEachStatement:
case SyntaxKind.ForEachComponentStatement:
AddLastStatementOfConstruct((statement as CommonForEachStatementSyntax).Statement);
break;
case SyntaxKind.IfStatement:
var ifStatement = statement as IfStatementSyntax;
AddLastStatementOfConstruct(ifStatement.Statement);
if (ifStatement.Else != null)
{
AddLastStatementOfConstruct(ifStatement.Else.Statement);
}
break;
case SyntaxKind.LockStatement:
AddLastStatementOfConstruct((statement as LockStatementSyntax).Statement);
break;
case SyntaxKind.SwitchStatement:
var switchStatement = statement as SwitchStatementSyntax;
foreach (var section in switchStatement.Sections)
{
AddLastStatementOfConstruct(section.Statements.LastOrDefault());
}
break;
case SyntaxKind.TryStatement:
var tryStatement = statement as TryStatementSyntax;
if (tryStatement.Finally != null)
{
AddLastStatementOfConstruct(tryStatement.Finally.Block);
}
else
{
AddLastStatementOfConstruct(tryStatement.Block);
foreach (var catchClause in tryStatement.Catches)
{
AddLastStatementOfConstruct(catchClause.Block);
}
}
break;
case SyntaxKind.UsingStatement:
AddLastStatementOfConstruct((statement as UsingStatementSyntax).Statement);
break;
case SyntaxKind.WhileStatement:
AddLastStatementOfConstruct((statement as WhileStatementSyntax).Statement);
break;
default:
AddRelevantExpressions(statement, _expressions, includeDeclarations: false);
break;
}
}