/// <summary>
/// Reads the next using-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>
/// <returns>Returns the statement.</returns>
private UsingStatement ParseUsingStatement(Reference<ICodePart> parentReference, bool unsafeCode)
{
Param.AssertNotNull(parentReference, "parentReference");
Param.Ignore(unsafeCode);
var statementReference = new Reference<ICodePart>();
// Move past the using keyword.
CsToken firstToken = this.GetToken(CsTokenType.Using, SymbolType.Using, parentReference, statementReference);
Node<CsToken> firstTokenNode = this.tokens.InsertLast(firstToken);
// 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.
Expression expression = this.GetNextExpression(ExpressionPrecedence.None, statementReference, unsafeCode, true, false);
if (expression == null)
{
throw this.CreateSyntaxException();
}
// 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 using-statement.
UsingStatement statement = new UsingStatement(partialTokens, expression);
statement.EmbeddedStatement = childStatement;
statementReference.Target = statement;
// Add the variable if there is one.
VariableDeclarationExpression variableDeclaration = expression as VariableDeclarationExpression;
if (variableDeclaration != null)
{
foreach (VariableDeclaratorExpression declarator in variableDeclaration.Declarators)
{
Variable variable = new Variable(
variableDeclaration.Type,
declarator.Identifier.Token.Text,
VariableModifiers.None,
CodeLocation.Join(variableDeclaration.Type.Location, declarator.Identifier.Token.Location),
statementReference,
variableDeclaration.Type.Generated || declarator.Identifier.Token.Generated);
// If there is already a variable in this scope with the same name, ignore this one.
if (!statement.Variables.Contains(declarator.Identifier.Token.Text))
{
statement.Variables.Add(variable);
}
}
}
return statement;
}
private UsingStatement ParseUsingStatement(bool unsafeCode)
{
CsToken item = this.GetToken(CsTokenType.Using, SymbolType.Using);
Microsoft.StyleCop.Node<CsToken> firstItemNode = this.tokens.InsertLast(item);
Bracket bracketToken = this.GetBracketToken(CsTokenType.OpenParenthesis, SymbolType.OpenParenthesis);
Microsoft.StyleCop.Node<CsToken> node2 = this.tokens.InsertLast(bracketToken);
Expression resource = this.GetNextExpression(ExpressionPrecedence.None, unsafeCode, true, false);
if (resource == null)
{
throw this.CreateSyntaxException();
}
Bracket bracket2 = this.GetBracketToken(CsTokenType.CloseParenthesis, SymbolType.CloseParenthesis);
Microsoft.StyleCop.Node<CsToken> node3 = this.tokens.InsertLast(bracket2);
bracketToken.MatchingBracketNode = node3;
bracket2.MatchingBracketNode = node2;
Statement nextStatement = this.GetNextStatement(unsafeCode);
if (nextStatement == null)
{
throw this.CreateSyntaxException();
}
CsTokenList tokens = new CsTokenList(this.tokens, firstItemNode, this.tokens.Last);
UsingStatement statement2 = new UsingStatement(tokens, resource);
statement2.EmbeddedStatement = nextStatement;
VariableDeclarationExpression expression2 = resource as VariableDeclarationExpression;
if (expression2 != null)
{
foreach (VariableDeclaratorExpression expression3 in expression2.Declarators)
{
Variable variable = new Variable(expression2.Type, expression3.Identifier.Token.Text, VariableModifiers.None, expression3.Tokens.First.Value.Location.StartPoint, expression2.Type.Generated || expression3.Identifier.Token.Generated);
if (!statement2.Variables.Contains(expression3.Identifier.Token.Text))
{
statement2.Variables.Add(variable);
}
}
}
return statement2;
}
