/// <summary>
/// Add new block
/// </summary>
/// <param name="lexemes">List of lexemes</param>
/// <param name="pos">Position of current parsed lexeme</param>
/// <param name="elem">Statement builded on lexemes. Always null</param>
/// <returns>Position of a next lexeme</returns>
private int ParseBlock(List <Lexeme> lexemes, int pos, out TreeElement elem)
{
StatementListElement block = new StatementListElement();
m_currentBlock.Peek().AddChild(block);
m_currentBlock.Push(block);
++pos; //skip '{'
elem = null;
return(pos);
}
/// <summary>
/// Parse function body
/// </summary>
/// <param name="funcInfo">Function to parse</param>
private void ParseFunction(Parser1To2Pass.FunctionInfo funcInfo)
{
var funcElem = new FunctionElement();
m_currentFunction = funcElem;
funcElem.Info = funcInfo.Info;
StatementListElement statements = new StatementListElement();
m_currentBlock.Push(statements);
foreach (var arg in funcInfo.Info.Arguments)
{
var declElem = new VarDeclarationElement
{
VarType = arg.TypeInfo.Name,
VarName = arg.ArgName,
IgnoreInitialization = true
};
declElem.SetParent(statements);
funcElem.AddArgumentVariable(declElem);
}
if (funcInfo.FuncLexemes.Count > 0)
{
for (int i = 0, end = funcInfo.FuncLexemes.Count;;)
{
TreeElement element;
i = ParseStatement(funcInfo.FuncLexemes, i, out element);
if (element != null) //if null => ignore (block element)
{
var statementElem = new StatementElement();
statementElem.AddChild(element);
m_currentBlock.Peek().AddChild(statementElem);
}
if (i >= end)
{
break;
}
}
}
funcElem.AddChild(statements);
m_parserOutput.Functions.Add(funcElem);
m_currentBlock.Pop();
}
private static FunctionElement CreateMain()
{
var symbols = LanguageSymbols.Instance;
LanguageFunction functionInfo = new LanguageFunction();
functionInfo.Name = "!_Main";
functionInfo.Arguments = new List <LanguageFunction.FunctionArg>();
functionInfo.ReturnTypes = new List <LanguageType>();
symbols.AddUserFunction(functionInfo);
FunctionElement funcElement = new FunctionElement();
funcElement.Info = functionInfo;
StatementListElement statements = new StatementListElement();
funcElement.AddChild(statements);
FunctionCallElement callElement = new FunctionCallElement();
LanguageFunction mainFuncInfo = null;
try
{
mainFuncInfo = symbols.GetFunction("Main", new List <string>());
}
catch (CompilationException)
{
Compilation.WriteError("Main() wasn't found. Did you forget it?", -1);
}
callElement.FunctionInfo = mainFuncInfo;
callElement.CallArguments = new List <ValueElement>();
statements.AddChild(callElement);
SingleGenOpElement exitElement = new SingleGenOpElement();
exitElement.Operation = new GenOp {
Code = GenCodes.Exit, ArgCount = 0
};
statements.AddChild(exitElement);
return(funcElement);
}
