private Expression ReadExpression(ScriptReader source, bool readTerminatingSymbolFromStream, params PredefinedSymbol[] endsWithSymbols)
{
Expression expression = new Expression();
int bracketLevel = 0;
while (bracketLevel >= 0)
{
foreach (PredefinedSymbol terminatingSymbol in endsWithSymbols)
{
if ((bracketLevel == 0) && (source.NextIsKeyword(terminatingSymbol, !readTerminatingSymbolFromStream)))
{
return(expression);
}
}
Token thisToken = source.PeekNextToken();
if (thisToken is EndOfStreamToken)
{
throw new CompilerMessage(ErrorCode.EndOfInputReached, "End of script reached in the middle of an expression");
}
CompilerUtils.AdjustBracketLevelIfTokenIsBracket(thisToken, ref bracketLevel);
if (bracketLevel >= 0)
{
expression.Add(source.ReadNextToken());
}
}
throw new CompilerMessage(ErrorCode.UnexpectedToken, "Unexpected '" + source.ReadNextToken() + "'");
}
public CompileResults CompileScript(string script)
{
ITokenizer tokenizer = CompilerFactory.CreateTokenizer();
_tokenizedScript = tokenizer.TokenizeScript(script);
_source = new ScriptReader(_tokenizedScript);
_output = new CompiledScript();
while (true)
{
Token thisToken = _source.ReadNextToken();
if (thisToken is EndOfStreamToken)
{
break;
}
try
{
ProcessTokenAtTopLevel(thisToken);
}
catch (CompilerMessage error)
{
RecordError(error.Code, error.Message);
break;
}
}
return(_results);
}
public CompileResults CompileScript(string script)
{
ITokenizer tokenizer = CompilerFactory.CreateTokenizer();
_tokenizedScript = tokenizer.TokenizeScript(script);
_source = new ScriptReader(_tokenizedScript);
_output = new CompiledScript();
while (true)
{
Token thisToken = _source.ReadNextToken();
if (thisToken is EndOfStreamToken)
{
break;
}
try
{
ProcessTokenAtTopLevel(thisToken);
}
catch (CompilerMessage error)
{
RecordError(error.Code, error.Message);
break;
}
}
return _results;
}
private void GenerateCodeForExpressionWithoutOperator(Expression expression)
{
System.Diagnostics.Trace.WriteLine(expression.ToString());
ScriptReader reader = new ScriptReader(expression, _source.LineNumber);
Token firstToken = reader.ReadNextToken();
Token memberName = null;
bool staticAccess = false;
if (firstToken.IsVariableType)
{
staticAccess = true;
}
else if (reader.NextIsKeyword(PredefinedSymbol.OpenSquareBracket))
{
Expression arrayIndex = ReadExpression(reader, true, PredefinedSymbol.CloseSquareBracket);
GenerateCodeForExpression(arrayIndex);
// TODO: Array access
}
if (reader.NextIsKeyword(PredefinedSymbol.Dot))
{
if ((firstToken.Type != TokenType.LocalVariable) &&
(firstToken.Type != TokenType.GlobalVariable) &&
(firstToken.Type != TokenType.StructType))
{
throw new CompilerMessage(ErrorCode.ParentIsNotAStruct, "'" + firstToken.Name + "' is not a struct");
}
memberName = reader.ReadNextToken();
// TODO: struct member stuff
if (staticAccess)
{
}
}
else if (staticAccess)
{
throw new CompilerMessage(ErrorCode.InvalidUseOfStruct, "Struct cannot be used in this way");
}
else
{
// TODO: just read the variable itself / execute the function
}
// TODO: Code this
}
public static void SetArrayPropertiesOnTokenFromStream(ScriptReader source, Token variableName)
{
if (source.NextIsKeyword(PredefinedSymbol.OpenSquareBracket))
{
variableName.IsArray = true;
if (source.NextIsKeyword(PredefinedSymbol.CloseSquareBracket))
{
variableName.ArraySize = Token.ARRAY_SIZE_DYNAMIC;
}
else
{
variableName.ArraySize = source.ReadNextAsConstInt();
source.ExpectKeyword(PredefinedSymbol.CloseSquareBracket);
}
}
}
public static void SetArrayPropertiesOnTokenFromStream(ScriptReader source, Token variableName)
{
if (source.NextIsKeyword(PredefinedSymbol.OpenSquareBracket))
{
variableName.IsArray = true;
if (source.NextIsKeyword(PredefinedSymbol.CloseSquareBracket))
{
variableName.ArraySize = Token.ARRAY_SIZE_DYNAMIC;
}
else
{
variableName.ArraySize = source.ReadNextAsConstInt();
source.ExpectKeyword(PredefinedSymbol.CloseSquareBracket);
}
}
}
private Expression ReadExpression(ScriptReader source, bool readTerminatingSymbolFromStream, params PredefinedSymbol[] endsWithSymbols)
{
Expression expression = new Expression();
int bracketLevel = 0;
while (bracketLevel >= 0)
{
foreach (PredefinedSymbol terminatingSymbol in endsWithSymbols)
{
if ((bracketLevel == 0) && (source.NextIsKeyword(terminatingSymbol, !readTerminatingSymbolFromStream)))
{
return expression;
}
}
Token thisToken = source.PeekNextToken();
if (thisToken is EndOfStreamToken)
{
throw new CompilerMessage(ErrorCode.EndOfInputReached, "End of script reached in the middle of an expression");
}
CompilerUtils.AdjustBracketLevelIfTokenIsBracket(thisToken, ref bracketLevel);
if (bracketLevel >= 0)
{
expression.Add(source.ReadNextToken());
}
}
throw new CompilerMessage(ErrorCode.UnexpectedToken, "Unexpected '" + source.ReadNextToken() + "'");
}
private void GenerateCodeForExpressionWithoutOperator(Expression expression)
{
System.Diagnostics.Trace.WriteLine(expression.ToString());
ScriptReader reader = new ScriptReader(expression, _source.LineNumber);
Token firstToken = reader.ReadNextToken();
Token memberName = null;
bool staticAccess = false;
if (firstToken.IsVariableType)
{
staticAccess = true;
}
else if (reader.NextIsKeyword(PredefinedSymbol.OpenSquareBracket))
{
Expression arrayIndex = ReadExpression(reader, true, PredefinedSymbol.CloseSquareBracket);
GenerateCodeForExpression(arrayIndex);
// TODO: Array access
}
if (reader.NextIsKeyword(PredefinedSymbol.Dot))
{
if ((firstToken.Type != TokenType.LocalVariable) &&
(firstToken.Type != TokenType.GlobalVariable) &&
(firstToken.Type != TokenType.StructType))
{
throw new CompilerMessage(ErrorCode.ParentIsNotAStruct, "'" + firstToken.Name + "' is not a struct");
}
memberName = reader.ReadNextToken();
// TODO: struct member stuff
if (staticAccess)
{
}
}
else if (staticAccess)
{
throw new CompilerMessage(ErrorCode.InvalidUseOfStruct, "Struct cannot be used in this way");
}
else
{
// TODO: just read the variable itself / execute the function
}
// TODO: Code this
}
/// <summary>
/// Starts processing a code block from the input stream. It is assumed
/// to start with a { or be a single expression.
/// </summary>
public void Process(ScriptReader script)
{
_source = script;
ProcessCodeBlock();
}
/// <summary>
/// Starts processing a code block from the input stream. It is assumed
/// to start with a { or be a single expression.
/// </summary>
public void Process(ScriptReader script)
{
_source = script;
ProcessCodeBlock();
}