/// <summary>
/// Reads the next variable declaration statement from the file and returns it.
/// </summary>
/// <param name="parentReference">
/// The parent code unit.
/// </param>
/// <param name="unsafeCode">
/// Indicates whether the code being parsed resides in an unsafe code block.
/// </param>
/// <param name="variables">
/// Returns the list of variables defined in the statement.
/// </param>
/// <returns>
/// Returns the statement.
/// </returns>
private VariableDeclarationStatement ParseVariableDeclarationStatement(Reference<ICodePart> parentReference, bool unsafeCode, VariableCollection variables)
{
Param.AssertNotNull(parentReference, "parentReference");
Param.Ignore(unsafeCode);
Param.Ignore(variables);
bool constant = false;
// Get the first symbol and make sure it is an unknown word or a const.
Symbol symbol = this.GetNextSymbol(parentReference);
CsToken firstToken = null;
Node<CsToken> firstTokenNode = null;
Reference<ICodePart> statementReference = new Reference<ICodePart>();
if (symbol.SymbolType == SymbolType.Const)
{
constant = true;
firstToken = new CsToken(symbol.Text, CsTokenType.Const, symbol.Location, statementReference, this.symbols.Generated);
firstTokenNode = this.tokens.InsertLast(this.GetToken(CsTokenType.Const, SymbolType.Const, statementReference));
symbol = this.GetNextSymbol(statementReference);
}
if (symbol.SymbolType != SymbolType.Other)
{
throw this.CreateSyntaxException();
}
// Get the expression representing the type.
LiteralExpression type = this.GetTypeTokenExpression(statementReference, unsafeCode, true);
if (type == null || type.Tokens.First == null)
{
throw new SyntaxException(this.document.SourceCode, firstToken.LineNumber);
}
if (firstTokenNode == null)
{
firstTokenNode = type.Tokens.First;
}
// Get the rest of the declaration.
VariableDeclarationExpression expression = this.GetVariableDeclarationExpression(type, ExpressionPrecedence.None, unsafeCode);
// Get the closing semicolon.
this.tokens.Add(this.GetToken(CsTokenType.Semicolon, SymbolType.Semicolon, statementReference));
// Add each of the variables defined in this statement to the variable list being returned.
if (variables != null)
{
VariableModifiers modifiers = constant ? VariableModifiers.Const : VariableModifiers.None;
foreach (VariableDeclaratorExpression declarator in expression.Declarators)
{
Variable variable = new Variable(
expression.Type,
declarator.Identifier.Token.Text,
modifiers,
CodeLocation.Join(expression.Type.Location, declarator.Identifier.Token.Location),
statementReference,
expression.Tokens.First.Value.Generated || declarator.Identifier.Token.Generated);
// There might already be a variable in this scope with the same name. This can happen
// in valid situation when there are ifdef's surrounding portions of the code.
// Just accept the first variable and ignore others.
if (!variables.Contains(declarator.Identifier.Token.Text))
{
variables.Add(variable);
}
}
}
// Create the token list for the statement.
CsTokenList partialTokens = new CsTokenList(this.tokens, firstTokenNode, this.tokens.Last);
VariableDeclarationStatement statement = new VariableDeclarationStatement(partialTokens, constant, expression);
statementReference.Target = statement;
return statement;
}
/// <summary>
/// The save.
/// </summary>
/// <param name="localVariable">
/// The local variable.
/// </param>
private void Save(VariableDeclarationStatement localVariable)
{
var storesaveVariablesMode = this.saveVariablesMode;
if (localVariable.Constant)
{
// must be static for C++ as well
if (storesaveVariablesMode == SaveVariablesMode.DefaultSourceInitializers)
{
this.cppWriter.Write("const ");
}
else
{
this.cppWriter.Write("const static ");
}
}
this.Save(localVariable.InnerExpression);
this.saveVariablesMode = storesaveVariablesMode;
}
