private void CheckStatementCurlyBracketPlacement(CsElement element, Statement statement)
{
Param.AssertNotNull(element, "element");
Param.AssertNotNull(statement, "statement");
switch (statement.StatementType)
{
case StatementType.Else:
// Check that there is nothing between the starting else keyword and the opening bracket.
this.CheckChainedStatementCurlyBracketPlacement(element, statement);
this.CheckBlockStatementsCurlyBracketPlacement(element, statement);
// Check that there is nothing between the closing bracket and the else keyword of the attached else statement.
ElseStatement elseStatement = (ElseStatement)statement;
if (elseStatement.AttachedElseStatement != null)
{
this.CheckTrailingStatementCurlyBracketPlacement(element, statement);
}
break;
case StatementType.Catch:
case StatementType.Finally:
// Check that there is nothing between the starting catch or finally keyword and the opening bracket.
this.CheckChainedStatementCurlyBracketPlacement(element, statement);
this.CheckBlockStatementsCurlyBracketPlacement(element, statement);
break;
case StatementType.If:
this.CheckBlockStatementsCurlyBracketPlacement(element, statement);
// Check that there is nothing between the closing bracket and the else keyword of the attached else statement.
IfStatement ifStatement = (IfStatement)statement;
if (ifStatement.AttachedElseStatement != null)
{
this.CheckTrailingStatementCurlyBracketPlacement(element, statement);
}
break;
case StatementType.Try:
// Check that there is nothing between the starting try keyword and the opening bracket.
this.CheckBlockStatementsCurlyBracketPlacement(element, statement);
TryStatement tryStatement = (TryStatement)statement;
if (tryStatement.FinallyStatement != null || (tryStatement.CatchStatements != null && tryStatement.CatchStatements.Count > 0))
{
// There is something attached to the end of this try statement. Check that there is nothing between
// the closing bracket of the try statement and the start of the attached statement.
this.CheckTrailingStatementCurlyBracketPlacement(element, tryStatement);
}
if (tryStatement.CatchStatements != null && tryStatement.CatchStatements.Count > 0)
{
CatchStatement[] catchStatementArray = new CatchStatement[tryStatement.CatchStatements.Count];
tryStatement.CatchStatements.CopyTo(catchStatementArray, 0);
for (int i = 0; i < catchStatementArray.Length; ++i)
{
if (catchStatementArray.Length > i + 1 || tryStatement.FinallyStatement != null)
{
// There is something attached to the end of this catch statement, either another catch or a finally.
// Check that there is nothing between the closing bracket of this catch statement and the start of the attached
// statement.
this.CheckTrailingStatementCurlyBracketPlacement(element, catchStatementArray[i]);
}
}
}
break;
case StatementType.Checked:
case StatementType.Fixed:
case StatementType.For:
case StatementType.Foreach:
case StatementType.Lock:
case StatementType.Switch:
case StatementType.Unchecked:
case StatementType.Unsafe:
case StatementType.Using:
case StatementType.While:
// Check that there is nothing between the starting keyword and the opening bracket.
this.CheckBlockStatementsCurlyBracketPlacement(element, statement);
break;
case StatementType.DoWhile:
this.CheckBlockStatementsCurlyBracketPlacement(element, statement);
this.CheckTrailingStatementCurlyBracketPlacement(element, statement);
break;
default:
break;
}
}
/// <summary>
/// Looks for an else-statement, and if it is found, parses and returns it.
/// </summary>
/// <param name="parentReference">
/// The parent code unit.
/// </param>
/// <param name="parentStatement">
/// The parent of the else-statement.
/// </param>
/// <param name="unsafeCode">
/// Indicates whether the code being parsed resides in an unsafe code block.
/// </param>
/// <returns>
/// Returns the statement.
/// </returns>
private ElseStatement GetAttachedElseStatement(Reference<ICodePart> parentReference, Statement parentStatement, bool unsafeCode)
{
Param.AssertNotNull(parentReference, "parentReference");
Param.AssertNotNull(parentStatement, "parentStatement");
Param.Ignore(unsafeCode);
ElseStatement statement = null;
// Check if the next keyword is an else.
Symbol symbol = this.GetNextSymbol(parentReference);
if (symbol.SymbolType == SymbolType.Else)
{
Reference<ICodePart> statementReference = new Reference<ICodePart>();
// Advance to this keyword and add it.
Node<CsToken> firstTokenNode = this.tokens.InsertLast(this.GetToken(CsTokenType.Else, SymbolType.Else, statementReference));
// Check if the next keyword is an if.
Expression conditional = null;
symbol = this.GetNextSymbol(statementReference);
if (symbol != null && symbol.SymbolType == SymbolType.If)
{
// Advance to this keyword and add it.
this.tokens.Add(this.GetToken(CsTokenType.If, SymbolType.If, statementReference));
// Get the opening parenthesis.
Bracket openParenthesis = this.GetBracketToken(CsTokenType.OpenParenthesis, SymbolType.OpenParenthesis, statementReference);
Node<CsToken> openParenthesisNode = this.tokens.InsertLast(openParenthesis);
// Get the expression within the parenthesis.
conditional = this.GetNextExpression(ExpressionPrecedence.None, statementReference, unsafeCode);
if (conditional == null)
{
throw new SyntaxException(this.document.SourceCode, symbol.LineNumber);
}
// Get the closing parenthesis.
Bracket closeParenthesis = this.GetBracketToken(CsTokenType.CloseParenthesis, SymbolType.CloseParenthesis, statementReference);
Node<CsToken> closeParenthesisNode = this.tokens.InsertLast(closeParenthesis);
openParenthesis.MatchingBracketNode = closeParenthesisNode;
closeParenthesis.MatchingBracketNode = openParenthesisNode;
}
// Get the embedded statement.
Statement childStatement = this.GetNextStatement(statementReference, unsafeCode);
if (childStatement == null)
{
throw this.CreateSyntaxException();
}
// Create the token list for the statement.
CsTokenList partialTokens = new CsTokenList(this.tokens, firstTokenNode, this.tokens.Last);
// Create the else-statement.
statement = new ElseStatement(partialTokens, conditional);
statement.EmbeddedStatement = childStatement;
((IWriteableCodeUnit)statement).SetParent(parentStatement);
// Check if there is another else or an else-if attached to this statement.
ElseStatement attached = this.GetAttachedElseStatement(statementReference, statement, unsafeCode);
if (attached != null)
{
statement.AttachedElseStatement = attached;
}
statementReference.Target = statement;
}
return statement;
}
/// <summary>
/// The save.
/// </summary>
/// <param name="elseStatement">
/// The else statement.
/// </param>
private void Save(ElseStatement elseStatement)
{
this.cppWriter.Write("else");
this.Save(elseStatement.EmbeddedStatement);
}
