private AST declarationAndAssignment()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("declaration and assignment");
#endif
AST_VariableDeclaration declarationTree = declaration();
Token assignmentToken = match(Token.TokenType.ASSIGNMENT);
AST expressionTree = expression();
if (expressionTree != null)
{
AST_Assignment assignmentTree = new AST_Assignment(assignmentToken, declarationTree.Name);
assignmentTree.addChild(expressionTree);
AST declarationAndAssignmentTree =
new AST(new Token(Token.TokenType.STATEMENT_LIST, "<DECLARATION_AND_ASSIGNMENT>", declarationTree.getToken().LineNr, declarationTree.getToken().LinePosition));
declarationAndAssignmentTree.addChild(declarationTree);
declarationAndAssignmentTree.addChild(assignmentTree);
return(declarationAndAssignmentTree);
}
else
{
throw new Error("The expression after = makes no sense", Error.ErrorType.SYNTAX,
lookAhead(1).LineNr, lookAhead(1).LinePosition);
}
}
private AST plusplusOrMinusminus()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("plusplusOrMinusminus");
#endif
Token nameToken = match(Token.TokenType.NAME);
Token operatorToken = match(Token.TokenType.OPERATOR);
AST operationTree = null;
if (operatorToken.getTokenString() == "++")
{
operationTree = new AST(new Token(Token.TokenType.OPERATOR, "+"));
}
else if (operatorToken.getTokenString() == "--")
{
operationTree = new AST(new Token(Token.TokenType.OPERATOR, "-"));
}
else
{
throw new Exception("Error!");
}
operationTree.addChild(new AST(nameToken));
operationTree.addChild(new AST(new TokenWithValue(Token.TokenType.NUMBER, "1", new ReturnValue(1.0f))));
AST assignmentTree = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), nameToken.getTokenString());
assignmentTree.addChild(operationTree);
return(assignmentTree);
}
private AST CreateAssignmentTreeFromInitValue(string pVariableName, object pInitValue)
{
Token.TokenType tokenType;
switch (ReturnValueConversions.SystemTypeToReturnValueType(pInitValue.GetType()))
{
case ReturnValueType.BOOL:
tokenType = Token.TokenType.BOOLEAN_VALUE;
break;
case ReturnValueType.STRING:
tokenType = Token.TokenType.QUOTED_STRING;
break;
case ReturnValueType.NUMBER:
tokenType = Token.TokenType.NUMBER;
break;
case ReturnValueType.ARRAY:
tokenType = Token.TokenType.ARRAY;
break;
case ReturnValueType.VOID:
throw new Error("Can't assign void to variable");
default:
throw new Exception("Forgot to implement support for a type?");
}
Token initValueToken = new TokenWithValue(tokenType, pInitValue.ToString(), pInitValue);
AST assignmentTree = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), pVariableName);
assignmentTree.addChild(initValueToken);
return(assignmentTree);
}
private AST assignmentToArray()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("assignment to array");
#endif
Token nameToken = null;
AST indexNode = null;
#if WRITE_DEBUG_INFO
Console.WriteLine("normal array");
#endif
nameToken = match(Token.TokenType.NAME);
match(Token.TokenType.BRACKET_LEFT);
indexNode = expression();
match(Token.TokenType.BRACKET_RIGHT);
if (lookAheadType(1) == Token.TokenType.NEW_LINE ||
lookAheadType(1) == Token.TokenType.EOF)
{
// it's a statement without assignment
return(indexNode);
}
Token assignmentToken = match(Token.TokenType.ASSIGNMENT);
AST expressionTree = expression();
if (expressionTree != null)
{
Token arrayAssignmentToken = new Token(Token.TokenType.ASSIGNMENT_TO_ARRAY, "=", assignmentToken.LineNr, assignmentToken.LinePosition);
AST_Assignment assignmentTree = new AST_Assignment(arrayAssignmentToken, nameToken.getTokenString());
assignmentTree.addChild(indexNode);
assignmentTree.addChild(expressionTree);
/*ASTPainter p = new ASTPainter();
* Console.WriteLine("---AST---");
* p.PaintAST(assignmentTree);
* Console.WriteLine("---------");*/
return(assignmentTree);
}
else
{
throw new Error("The expression after = makes no sense", Error.ErrorType.SYNTAX,
assignmentToken.LineNr, assignmentToken.LinePosition);
}
}
private AST foreachStuff()
{
AST statementList = new AST(new Token(Token.TokenType.STATEMENT_LIST, "<FOREACH_STATEMENTS>"));
// increase __index__
AST incrementNode = new AST(new Token(Token.TokenType.OPERATOR, "+"));
incrementNode.addChild(new AST(new Token(Token.TokenType.NAME, "__index__")));
incrementNode.addChild(new AST(new TokenWithValue(Token.TokenType.NUMBER, "1", new ReturnValue(1.0f))));
AST_Assignment assignmentNode = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__index__");
assignmentNode.addChild(incrementNode);
statementList.addChild(assignmentNode);
// if(__index__ >= count(__indexes__)) { break }
AST_FunctionCall lengthOfArray = new AST_FunctionCall(new Token(Token.TokenType.FUNCTION_CALL, "count"));
AST argumentList = new AST(new Token(Token.TokenType.NODE_GROUP, "<ARGUMENT_LIST>"));
argumentList.addChild(new Token(Token.TokenType.NAME, "__indexes__"));
lengthOfArray.addChild(argumentList);
AST breakStatement = new AST_IfNode(new Token(Token.TokenType.IF, "IF"));
AST operatorTree = new AST(new Token(Token.TokenType.OPERATOR, ">="));
operatorTree.addChild(new Token(Token.TokenType.NAME, "__index__"));
operatorTree.addChild(lengthOfArray);
breakStatement.addChild(operatorTree);
breakStatement.addChild(new Token(Token.TokenType.BREAK, "break"));
statementList.addChild(breakStatement);
// @ variable
AST_VariableDeclaration declarationTree =
new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.UNKNOWN_TYPE,
"@");
statementList.addChild(declarationTree);
AST arrayIndexLookup = new AST(new Token(Token.TokenType.ARRAY_LOOKUP, "__indexes__"));
arrayIndexLookup.addChild(new AST(new Token(Token.TokenType.NAME, "__index__")));
AST arrayValueLookup = new AST(new Token(Token.TokenType.ARRAY_LOOKUP, "__array__"));
arrayValueLookup.addChild(arrayIndexLookup);
AST_Assignment assignmentTree =
new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "@");
assignmentTree.addChild(arrayValueLookup);
statementList.addChild(assignmentTree);
return(statementList);
}
private AST assignmentAndOperator()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("assignment and operator");
#endif
Token nameToken = match(Token.TokenType.NAME);
Token operatorToken = match(Token.TokenType.OPERATOR);
AST expressionTree = expression();
if (expressionTree != null)
{
AST_Assignment assignmentTree = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), nameToken.getTokenString());
AST selfOperation = null;
if (operatorToken.getTokenString() == "+=")
{
selfOperation = new AST(new Token(Token.TokenType.OPERATOR, "+"));
}
else
{
throw new Error("Can't handle the operator '" + operatorToken.getTokenString() + "'",
Error.ErrorType.SYNTAX, assignmentTree.getToken().LineNr,
assignmentTree.getToken().LinePosition);
}
selfOperation.addChild(nameToken);
selfOperation.addChild(expressionTree);
assignmentTree.addChild(selfOperation);
return(assignmentTree);
}
else
{
throw new Error("The expression after " + operatorToken.getTokenString()
+ " makes no sense", Error.ErrorType.SYNTAX,
operatorToken.LineNr, operatorToken.LinePosition);
}
}
private AST assignment()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("assignment");
#endif
Token nameToken = match(Token.TokenType.NAME);
Token assignmentToken = match(Token.TokenType.ASSIGNMENT);
AST expressionTree = expression();
if (expressionTree != null)
{
AST_Assignment assignmentTree = new AST_Assignment(assignmentToken, nameToken.getTokenString());
assignmentTree.addChild(expressionTree);
return(assignmentTree);
}
else
{
throw new Error("The expression after = makes no sense", Error.ErrorType.SYNTAX,
assignmentToken.LineNr, assignmentToken.LinePosition);
}
}
private AST loop()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("loop");
#endif
AST loopBlockStatements = new AST(new Token(Token.TokenType.STATEMENT_LIST, "<LOOP_BLOCK_STATEMENTS>"));
AST_LoopNode loopTree = new AST_LoopNode(match(Token.TokenType.LOOP));
string loopVariableName = "@"; // default name if no name is specified directly after 'loop' keyword
bool isForeachLoop = false;
if(lookAheadType(1) != Token.TokenType.NEW_LINE)
{
#if WRITE_DEBUG_INFO
Console.WriteLine("foreach loop!");
#endif
isForeachLoop = true;
// __index__
AST_VariableDeclaration loopIndexDeclaration
= new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.NUMBER,
"__index__");
loopBlockStatements.addChild(loopIndexDeclaration);
AST_Assignment loopIndexAssignment
= new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__index__");
loopIndexAssignment.addChild(new AST(new TokenWithValue(Token.TokenType.NUMBER, "-1", -1.0f)));
loopBlockStatements.addChild(loopIndexAssignment);
Token savePoint = lookAhead(1); // will backtrack from here if matching loopVariable + loopRangeExpression fails
//Console.WriteLine("Created save point at token " + savePoint);
Token loopVariable = null;
AST loopRangeExpression = null; // what the loop will loop through
if ((lookAheadType (1) == Token.TokenType.NAME && lookAheadType(2) == Token.TokenType.IN) ||
(lookAheadType (1) == Token.TokenType.NAME && lookAheadType(2) == Token.TokenType.FROM))
{
loopVariable = match (Token.TokenType.NAME);
if(lookAheadType(1) == Token.TokenType.IN) {
match (Token.TokenType.IN);
}
else if(lookAheadType(1) == Token.TokenType.FROM) {
// proceed
}
try {
//Console.WriteLine ("Found a potential loop variable " + loopVariable.getTokenString() + ", trying to match loop range expression with a loop variable");
loopRangeExpression = expression();
if(loopRangeExpression == null) {
//Console.WriteLine ("null! Failed to match statement after loop variable, will backtrack and assume this loop does not use a loop variable");
backtrackToToken (savePoint);
} else {
loopVariableName = loopVariable.getTokenString();
//Console.WriteLine("Success, loop variable is called: " + loopVariableName);
}
}
catch(Error e) {
//Console.WriteLine ("Failed to match statement after loop variable, will backtrack and assume this loop does not use a loop variable");
backtrackToToken (savePoint);
}
}
if (loopRangeExpression == null) {
//Console.WriteLine ("There is no loop variable, trying to match a bare loop range expression");
loopRangeExpression = expression();
}
if (loopRangeExpression == null) {
throw new Error ("Failed to match the expression after 'loop'", Error.ErrorType.SYNTAX, loopTree.getToken ().LineNr, loopTree.getToken ().LinePosition);
}
//Console.WriteLine ("Loop range/array expression: ");
//(new ASTPainter ()).PaintAST (loopRangeExpression);
// __array__ (is a copy of the array to loop over)
AST_VariableDeclaration loopArrayDeclaration = new AST_VariableDeclaration(
new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.UNKNOWN_TYPE,
"__array__");
loopBlockStatements.addChild(loopArrayDeclaration);
AST_Assignment loopArrayAssignment =
new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__array__");
if(loopRangeExpression != null) {
loopArrayAssignment.addChild(loopRangeExpression);
}
else {
throw new Error("Can't understand array expression in loop", Error.ErrorType.SYNTAX,
loopArrayAssignment.getToken().LineNr,
loopArrayAssignment.getToken().LinePosition);
}
loopBlockStatements.addChild(loopArrayAssignment);
// __indexes__ (holds all the indexes in the array, since it works like a SortedDictionary)
// __indexes = getIndexes(__array__)
AST_VariableDeclaration indexesDeclaration = new AST_VariableDeclaration(
new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.UNKNOWN_TYPE,
"__indexes__");
loopBlockStatements.addChild(indexesDeclaration);
AST_FunctionCall getArrayIndexes = new AST_FunctionCall(new Token(Token.TokenType.FUNCTION_CALL, "GetIndexes"));
AST argumentList = new AST(new Token(Token.TokenType.NODE_GROUP, "<ARGUMENT_LIST>"));
argumentList.addChild(new Token(Token.TokenType.NAME, "__array__"));
getArrayIndexes.addChild(argumentList);
AST_Assignment indexesAssignment = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__indexes__");
indexesAssignment.addChild(getArrayIndexes);
loopBlockStatements.addChild(indexesAssignment);
}
else
{
#if WRITE_DEBUG_INFO
Console.WriteLine("infinite loop!");
#endif
}
/*
* loopParentTree
* __index__-declaration
* __array__-declaration & assigment
* loop tree
* loop body
* foreach stuff
* rest of statements
* goto beginning of loop
*
* */
allowLineBreak();
AST loopBody = statementList(false);
loopBody.addChild(new AST(new Token(Token.TokenType.GOTO_BEGINNING_OF_LOOP, "<GOTO_BEGINNING_OF_LOOP>")));
allowLineBreak();
match(Token.TokenType.BLOCK_END);
if(isForeachLoop) {
loopBody.addChildFirst(foreachStuff(loopVariableName));
}
loopTree.addChild(loopBody);
loopBlockStatements.addChild(loopTree);
AST_LoopBlockNode loopBlock = new AST_LoopBlockNode(new Token(Token.TokenType.LOOP_BLOCK, "<LOOP_BLOCK>"));
loopBlock.addChild(loopBlockStatements);
return loopBlock;
}
private AST foreachStuff(string pLoopVariableName)
{
AST statementList = new AST(new Token(Token.TokenType.STATEMENT_LIST, "<FOREACH_STATEMENTS>"));
// increase __index__
AST incrementNode = new AST(new Token(Token.TokenType.OPERATOR, "+"));
incrementNode.addChild(new AST(new Token(Token.TokenType.NAME, "__index__")));
incrementNode.addChild(new AST(new TokenWithValue(Token.TokenType.NUMBER, "1", 1.0f)));
AST_Assignment assignmentNode = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__index__");
assignmentNode.addChild(incrementNode);
statementList.addChild(assignmentNode);
// if(__index__ >= count(__indexes__)) { break }
AST_FunctionCall lengthOfArray = new AST_FunctionCall(new Token(Token.TokenType.FUNCTION_CALL, "Count"));
AST argumentList = new AST(new Token(Token.TokenType.NODE_GROUP, "<ARGUMENT_LIST>"));
argumentList.addChild(new Token(Token.TokenType.NAME, "__indexes__"));
lengthOfArray.addChild(argumentList);
AST breakStatement = new AST_IfNode(new Token(Token.TokenType.IF, "IF"));
AST operatorTree = new AST(new Token(Token.TokenType.OPERATOR, ">="));
operatorTree.addChild(new Token(Token.TokenType.NAME, "__index__"));
operatorTree.addChild(lengthOfArray);
breakStatement.addChild(operatorTree);
breakStatement.addChild(new Token(Token.TokenType.BREAK, "break"));
statementList.addChild(breakStatement);
// Loop variable
AST_VariableDeclaration declarationTree =
new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"), ReturnValueType.UNKNOWN_TYPE, pLoopVariableName);
statementList.addChild(declarationTree);
AST arrayIndexLookup = new AST(new Token(Token.TokenType.ARRAY_LOOKUP, "__indexes__"));
arrayIndexLookup.addChild(new AST(new Token(Token.TokenType.NAME, "__index__")));
AST arrayValueLookup = new AST(new Token(Token.TokenType.ARRAY_LOOKUP, "__array__"));
arrayValueLookup.addChild(arrayIndexLookup);
AST_Assignment assignmentTree =
new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), pLoopVariableName);
assignmentTree.addChild(arrayValueLookup);
statementList.addChild(assignmentTree);
return statementList;
}
private AST declarationAndAssignment()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("declaration and assignment");
#endif
AST_VariableDeclaration declarationTree = declaration();
Token assignmentToken = match(Token.TokenType.ASSIGNMENT);
AST expressionTree = expression();
if(expressionTree != null) {
AST_Assignment assignmentTree = new AST_Assignment(assignmentToken, declarationTree.Name);
assignmentTree.addChild(expressionTree);
AST declarationAndAssignmentTree =
new AST(new Token(Token.TokenType.STATEMENT_LIST, "<DECLARATION_AND_ASSIGNMENT>", declarationTree.getToken().LineNr, declarationTree.getToken().LinePosition));
declarationAndAssignmentTree.addChild(declarationTree);
declarationAndAssignmentTree.addChild(assignmentTree);
return declarationAndAssignmentTree;
} else {
throw new Error("The expression after = makes no sense", Error.ErrorType.SYNTAX,
lookAhead(1).LineNr, lookAhead(1).LinePosition);
}
}
private AST assignmentToArray()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("assignment to array");
#endif
Token nameToken = null;
AST indexNode = null;
#if WRITE_DEBUG_INFO
Console.WriteLine("normal array");
#endif
nameToken = match(Token.TokenType.NAME);
match(Token.TokenType.BRACKET_LEFT);
indexNode = expression();
match(Token.TokenType.BRACKET_RIGHT);
if(lookAheadType(1) == Token.TokenType.NEW_LINE ||
lookAheadType(1) == Token.TokenType.EOF)
{
// it's a statement without assignment
return indexNode;
}
Token assignmentToken = match(Token.TokenType.ASSIGNMENT);
AST expressionTree = expression();
if(expressionTree != null) {
Token arrayAssignmentToken = new Token(Token.TokenType.ASSIGNMENT_TO_ARRAY, "=", assignmentToken.LineNr, assignmentToken.LinePosition);
AST_Assignment assignmentTree = new AST_Assignment(arrayAssignmentToken, nameToken.getTokenString());
assignmentTree.addChild(indexNode);
assignmentTree.addChild(expressionTree);
/*ASTPainter p = new ASTPainter();
Console.WriteLine("---AST---");
p.PaintAST(assignmentTree);
Console.WriteLine("---------");*/
return assignmentTree;
}
else {
throw new Error("The expression after = makes no sense", Error.ErrorType.SYNTAX,
assignmentToken.LineNr, assignmentToken.LinePosition);
}
}
private AST assignmentAndOperator()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("assignment and operator");
#endif
Token nameToken = match(Token.TokenType.NAME);
Token operatorToken = match(Token.TokenType.OPERATOR);
AST expressionTree = expression();
if(expressionTree != null) {
AST_Assignment assignmentTree = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), nameToken.getTokenString());
AST selfOperation = null;
if(operatorToken.getTokenString() == "+=") {
selfOperation = new AST(new Token(Token.TokenType.OPERATOR, "+"));
}
else if(operatorToken.getTokenString() == "*=") {
selfOperation = new AST(new Token(Token.TokenType.OPERATOR, "*"));
}
else if(operatorToken.getTokenString() == "-=") {
selfOperation = new AST(new Token(Token.TokenType.OPERATOR, "-"));
}
else if(operatorToken.getTokenString() == "/=") {
selfOperation = new AST(new Token(Token.TokenType.OPERATOR, "/"));
}
else {
throw new Error("Can't handle the operator '" + operatorToken.getTokenString() + "'",
Error.ErrorType.SYNTAX, assignmentTree.getToken().LineNr,
assignmentTree.getToken().LinePosition);
}
selfOperation.addChild(nameToken);
selfOperation.addChild(expressionTree);
assignmentTree.addChild(selfOperation);
return assignmentTree;
}
else {
throw new Error("The expression after " + operatorToken.getTokenString()
+ " makes no sense", Error.ErrorType.SYNTAX,
operatorToken.LineNr, operatorToken.LinePosition);
}
}
private AST assignment()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("assignment");
#endif
Token nameToken = match(Token.TokenType.NAME);
Token assignmentToken = match(Token.TokenType.ASSIGNMENT);
AST expressionTree = expression();
if(expressionTree != null) {
AST_Assignment assignmentTree = new AST_Assignment(assignmentToken, nameToken.getTokenString());
assignmentTree.addChild(expressionTree);
return assignmentTree;
}
else {
throw new Error("The expression after = makes no sense", Error.ErrorType.SYNTAX,
assignmentToken.LineNr, assignmentToken.LinePosition);
}
}
private AST loop()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("loop");
#endif
AST loopBlockStatements = new AST(new Token(Token.TokenType.STATEMENT_LIST, "<LOOP_BLOCK_STATEMENTS>"));
AST_LoopNode loopTree = new AST_LoopNode(match(Token.TokenType.LOOP));
bool isForeachLoop = false;
if (lookAheadType(1) != Token.TokenType.NEW_LINE)
{
#if WRITE_DEBUG_INFO
Console.WriteLine("foreach loop!");
#endif
isForeachLoop = true;
// __index__
AST_VariableDeclaration loopIndexDeclaration
= new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.NUMBER,
"__index__");
loopBlockStatements.addChild(loopIndexDeclaration);
AST_Assignment loopIndexAssignment
= new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__index__");
loopIndexAssignment.addChild(new AST(new TokenWithValue(Token.TokenType.NUMBER, "-1", new ReturnValue(-1.0f))));
loopBlockStatements.addChild(loopIndexAssignment);
// match
//match(Token.TokenType.PARANTHESIS_LEFT);
AST arrayExpression = expression();
//match(Token.TokenType.PARANTHESIS_RIGHT);
// __array__ (is a copy of the array to loop over)
AST_VariableDeclaration loopArrayDeclaration
= new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.ARRAY,
"__array__");
loopBlockStatements.addChild(loopArrayDeclaration);
AST_Assignment loopArrayAssignment =
new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__array__");
if (arrayExpression != null)
{
loopArrayAssignment.addChild(arrayExpression);
}
else
{
throw new Error("Can't understand array expression in loop", Error.ErrorType.SYNTAX,
loopArrayAssignment.getToken().LineNr,
loopArrayAssignment.getToken().LinePosition);
}
loopBlockStatements.addChild(loopArrayAssignment);
// __indexes__ (holds all the indexes in the array, since it works like a SortedDictionary)
// __indexes = getIndexes(__array__)
AST_VariableDeclaration indexesDeclaration
= new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.ARRAY,
"__indexes__");
loopBlockStatements.addChild(indexesDeclaration);
AST_FunctionCall getArrayIndexes = new AST_FunctionCall(new Token(Token.TokenType.FUNCTION_CALL,
"getIndexes"));
AST argumentList = new AST(new Token(Token.TokenType.NODE_GROUP, "<ARGUMENT_LIST>"));
argumentList.addChild(new Token(Token.TokenType.NAME, "__array__"));
getArrayIndexes.addChild(argumentList);
AST_Assignment indexesAssignment =
new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__indexes__");
indexesAssignment.addChild(getArrayIndexes);
loopBlockStatements.addChild(indexesAssignment);
}
else
{
#if WRITE_DEBUG_INFO
Console.WriteLine("infinite loop!");
#endif
}
/*
* loopParentTree
* __index__-declaration
* __array__-declaration & assigment
* loop tree
* loop body
* foreach stuff
* rest of statements
* goto beginning of loop
*
* */
allowLineBreak();
AST loopBody = statementList(false);
loopBody.addChild(new AST(new Token(Token.TokenType.GOTO_BEGINNING_OF_LOOP, "<GOTO_BEGINNING_OF_LOOP>")));
allowLineBreak();
match(Token.TokenType.BLOCK_END);
if (isForeachLoop)
{
loopBody.addChildFirst(foreachStuff());
}
loopTree.addChild(loopBody);
loopBlockStatements.addChild(loopTree);
AST_LoopBlockNode loopBlock = new AST_LoopBlockNode(new Token(Token.TokenType.LOOP_BLOCK, "<LOOP_BLOCK>"));
loopBlock.addChild(loopBlockStatements);
return(loopBlock);
}
private AST plusplusOrMinusminus()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("plusplusOrMinusminus");
#endif
Token nameToken = match(Token.TokenType.NAME);
Token operatorToken = match(Token.TokenType.OPERATOR);
AST operationTree = null;
if(operatorToken.getTokenString() == "++") {
operationTree = new AST(new Token(Token.TokenType.OPERATOR, "+"));
}
else if(operatorToken.getTokenString() == "--") {
operationTree = new AST(new Token(Token.TokenType.OPERATOR, "-"));
}
else {
throw new Error("Invalid operator token");
}
operationTree.addChild(new AST(nameToken));
operationTree.addChild(new AST(new TokenWithValue(Token.TokenType.NUMBER, "1", 1.0f)));
AST assignmentTree = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), nameToken.getTokenString());
assignmentTree.addChild(operationTree);
return assignmentTree;
}
private AST CreateAssignmentTreeFromInitValue(string pVariableName, ReturnValue pInitValue)
{
Token.TokenType tokenType;
switch(pInitValue.getReturnValueType()) {
case ReturnValueType.BOOL:
tokenType = Token.TokenType.BOOLEAN_VALUE;
break;
case ReturnValueType.STRING:
tokenType = Token.TokenType.QUOTED_STRING;
break;
case ReturnValueType.NUMBER:
tokenType = Token.TokenType.NUMBER;
break;
case ReturnValueType.ARRAY:
tokenType = Token.TokenType.ARRAY;
break;
case ReturnValueType.VOID:
throw new Error("Can't assign void to variable");
default:
throw new Exception("Forgot to implement support for a type?");
}
Token initValueToken = new TokenWithValue(tokenType, pInitValue.ToString(), pInitValue);
AST assignmentTree = new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), pVariableName);
assignmentTree.addChild(initValueToken);
return assignmentTree;
}
private AST loop()
{
#if WRITE_DEBUG_INFO
Console.WriteLine("loop");
#endif
AST loopBlockStatements = new AST(new Token(Token.TokenType.STATEMENT_LIST, "<LOOP_BLOCK_STATEMENTS>"));
AST_LoopNode loopTree = new AST_LoopNode(match(Token.TokenType.LOOP));
bool isForeachLoop = false;
if(lookAheadType(1) != Token.TokenType.NEW_LINE)
{
#if WRITE_DEBUG_INFO
Console.WriteLine("foreach loop!");
#endif
isForeachLoop = true;
// __index__
AST_VariableDeclaration loopIndexDeclaration
= new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.NUMBER,
"__index__");
loopBlockStatements.addChild(loopIndexDeclaration);
AST_Assignment loopIndexAssignment
= new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__index__");
loopIndexAssignment.addChild(new AST(new TokenWithValue(Token.TokenType.NUMBER, "-1", new ReturnValue(-1.0f))));
loopBlockStatements.addChild(loopIndexAssignment);
// match
//match(Token.TokenType.PARANTHESIS_LEFT);
AST arrayExpression = expression();
//match(Token.TokenType.PARANTHESIS_RIGHT);
// __array__ (is a copy of the array to loop over)
AST_VariableDeclaration loopArrayDeclaration
= new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.ARRAY,
"__array__");
loopBlockStatements.addChild(loopArrayDeclaration);
AST_Assignment loopArrayAssignment =
new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__array__");
if(arrayExpression != null) {
loopArrayAssignment.addChild(arrayExpression);
}
else {
throw new Error("Can't understand array expression in loop", Error.ErrorType.SYNTAX,
loopArrayAssignment.getToken().LineNr,
loopArrayAssignment.getToken().LinePosition);
}
loopBlockStatements.addChild(loopArrayAssignment);
// __indexes__ (holds all the indexes in the array, since it works like a SortedDictionary)
// __indexes = getIndexes(__array__)
AST_VariableDeclaration indexesDeclaration
= new AST_VariableDeclaration(new Token(Token.TokenType.VAR_DECLARATION, "<VAR_DECL>"),
ReturnValueType.ARRAY,
"__indexes__");
loopBlockStatements.addChild(indexesDeclaration);
AST_FunctionCall getArrayIndexes = new AST_FunctionCall(new Token(Token.TokenType.FUNCTION_CALL,
"getIndexes"));
AST argumentList = new AST(new Token(Token.TokenType.NODE_GROUP, "<ARGUMENT_LIST>"));
argumentList.addChild(new Token(Token.TokenType.NAME, "__array__"));
getArrayIndexes.addChild(argumentList);
AST_Assignment indexesAssignment =
new AST_Assignment(new Token(Token.TokenType.ASSIGNMENT, "="), "__indexes__");
indexesAssignment.addChild(getArrayIndexes);
loopBlockStatements.addChild(indexesAssignment);
}
else
{
#if WRITE_DEBUG_INFO
Console.WriteLine("infinite loop!");
#endif
}
/*
* loopParentTree
* __index__-declaration
* __array__-declaration & assigment
* loop tree
* loop body
* foreach stuff
* rest of statements
* goto beginning of loop
*
* */
allowLineBreak();
AST loopBody = statementList(false);
loopBody.addChild(new AST(new Token(Token.TokenType.GOTO_BEGINNING_OF_LOOP, "<GOTO_BEGINNING_OF_LOOP>")));
allowLineBreak();
match(Token.TokenType.BLOCK_END);
if(isForeachLoop) {
loopBody.addChildFirst(foreachStuff());
}
loopTree.addChild(loopBody);
loopBlockStatements.addChild(loopTree);
AST_LoopBlockNode loopBlock = new AST_LoopBlockNode(new Token(Token.TokenType.LOOP_BLOCK, "<LOOP_BLOCK>"));
loopBlock.addChild(loopBlockStatements);
return loopBlock;
}