private void AddVariable(SymbolDeclarationNode variable)
{
if (symbols.ContainsKey(variable.Variable.Name))
{
ErrorCode.VariableAlreadyDeclared.ReportAndThrow(variable.SequencePoint,
String.Format("Variable {0} already declared in this scope", variable.Variable.Name));
}
symbols.Add(variable.Variable.Name, variable);
}
public override ExpressionNode GetSymbol(string name, ContextNode scope, SequencePoint point)
{
if (symbols.ContainsKey(name))
{
SymbolDeclarationNode node = symbols[name];
return(new LocalVariableNode(point, node.Variable, node.IsConst));
}
return(Parent.GetSymbol(name, scope, point));
}
public CodeBlockNode AddStatement(IAbstractSyntaxTree lexerNode)
{
switch (lexerNode.Type)
{
case Lexer.TokenType.DeclarationNode:
return(AddNode(SymbolDeclarationNode.Parse(this, lexerNode)));
case Lexer.TokenType.Value:
return(AddNode(ExpressionNode.Parse(this, lexerNode)));
case Lexer.TokenType.ReturnNode:
return(AddNode(ReturnNode.Parse(this, lexerNode)));
default:
ErrorCode.InvalidStructure.ReportAndThrow(Parser.GetSequencePoint(lexerNode), "Unexpected statement {0} in while parsing code block", lexerNode.Type);
return(Utils.Utils.Fail <CodeBlockNode>());
}
}
private void AddDeclaration(SymbolDeclarationNode node)
{
AddVariable(node);
nodes.Add(node);
}