public Node FunctionDefinition()
{
MatchAndEat(TokenType.DEF);
String functionName = MatchAndEat(TokenType.KEYWORD).text;
MatchAndEat(TokenType.LEFT_PAREN);
List <Parameter> parameters = FunctionDefParameters();
MatchAndEat(TokenType.RIGHT_PAREN);
Node functionBody = Block();
Function function = new Function(functionName, functionBody, parameters);
Node functionVariable = new AssignmentNode(functionName, function, this);
return(functionVariable);
}
public Node Assignment()
{
Node node = null;
String name = MatchAndEat(TokenType.KEYWORD).text;
MatchAndEat(TokenType.ASSIGNMENT);
if (CurrentToken().type == TokenType.LEFT_BRACKET)
{
node = ArrayDefinition(name);
}
else
{
Node value = Expression();
node = new AssignmentNode(name, value, this);
}
return(node);
}
public Node For()
{
MatchAndEat(TokenType.FOR);
Node variable = Assignment();
MatchAndEat(TokenType.COMMA);
Node condition = Expression();
MatchAndEat(TokenType.COMMA);
String name = MatchAndEat(TokenType.KEYWORD).text;
MatchAndEat(TokenType.ASSIGNMENT);
Node operation = Expression();
Node action = new AssignmentNode(name, operation, this);
Node body = Block();
return(new ForNode(variable, condition, action, body));
}