internal static bool IsOperator(Token op)
{
foreach (string inop in AllOperators)
{
if (op.Value.Equals(inop))
{
return true;
}
}
return false;
}
internal FunctionCallExpression(
Token functionName)
: this()
{
this.functionName = functionName.IdentiferName;
this.identifier = functionName;
}
internal FunctionCallExpression(
Token functionName,
List<Expr> parameters)
: this(functionName)
{
this.functionName = functionName.IdentiferName;
this.listOfParameters = parameters;
}
internal static ShiftReduceEval Validate(Token opOnStack, Token opInStream)
{
string s = (String)opOnStack.Value;
string y = (String)opInStream.Value;
OpValue? stackEnum = GetOpAsEnum(s);
OpValue? streamEnum = GetOpAsEnum(y);
return OperatorPrecedenceTable.ShiftReduceOperationTable[(int)stackEnum, (int)streamEnum];
}
internal ArrayDeclExpr(Token tokenType, Token tokenIdentifier, int size)
: this(tokenType, tokenIdentifier)
{
this.size = size;
}
internal StatementsSeqExpr(
Token identifer,
SequenceExpressionType type)
: this()
{
identifier = identifer;
sequenceType = type;
}
internal OperatorExpression(Token token)
: this()
{
this.identifier = token;
operationType = Arity.binary;
}
internal IdentifierExpression(Token token, IdentifierExpression nested)
: this(token)
{
this.nestedExpression = nested;
}
internal IntegerLeaf(Token t)
: base(t)
{
}
internal IdentifierLeaf(Token identifier)
: base(identifier)
{
}
internal OperatorNode(Token operand)
: base(operand)
{
}
/// <summary>
/// Parse the signature of the function
/// </summary>
private void ParseFunctionSignature(
Expr parentNode,
Token functionName)
{
List<Expr> pll = null;
functionName.Kind = ByteCodeIdentifiers.TokenCode.Function;
Token paren = _scanner.GetToken();
/*
* If there are parameters
* add them to the parameter list
*/
if (paren.Value.Equals(constants.LEFTPAREN))
{
pll = ParseFunctionParameters();
}
if (pll != null && pll.Count > 0)
{
var progExpression = parentNode as BlockDeclExpr;
if (progExpression != null)
{
progExpression.Parameters = pll;
}
if (functionName.IdentiferName.Equals(constants.MAIN, StringComparison.OrdinalIgnoreCase))
{
_isMain = true;
progExpression.IsMain = true;
}
}
}
private IdentifierExpression DetermineNextToken(Token t)
{
switch (t.IdentiferName.ToLower())
{
case "int":
case "float":
case "string":
case "char":
case "bool":
case "bit":
case "object":
case "new":
Token next = _scanner.GetToken();
Expr currentScope = _expressionScopeStack.Peek();
SymbolTable.CreateInstance().AddTokenToScope(currentScope, new IdentifierExpression(next));
if (next.IsReserverdWord())
{
throw new NireExecutionException("a reserverd word cannot be here");
}
if (next.IsIdentifier() && !next.isOperator)
{
return new IdentifierExpression(t, new IdentifierExpression(next));
}
break;
default:
{
Expr defaultScope = _expressionScopeStack.Peek();
SymbolTable.CreateInstance().AddTokenToScope(defaultScope, new IdentifierExpression(t));
return new IdentifierExpression(t);
}
}
return null;
}
private Expr ArrayDeclaration(Token tokenType)
{
Token isArray = _scanner.Peek();
var expStack = _expressionScopeStack.Peek();
ArrayDeclExpr ade = null;
if (isArray is TokenSpecial)
{
if (isArray.Equals("[]"))
{
_scanner.EatCurrentToken();
Token t = _scanner.GetToken();
ade = new ArrayDeclExpr(tokenType, t);
return ade;
}
if (isArray.Equals("["))
{
_scanner.EatCurrentToken();
var endBracket = _scanner.Peek();
if (endBracket is TokenSpecial &&
endBracket.Equals("]"))
{
_scanner.EatCurrentToken();
Token identifier = _scanner.GetToken();
ade = new ArrayDeclExpr(tokenType, identifier);
return ade;
}
else
{
var context = ParserContext.Context;
if (endBracket.Kind == ByteCodeIdentifiers.TokenCode.Number)
{
if (context == ParserContextEnum.FunctionDecl)
{
throw new NireException();
}
int value;
if(int.TryParse(endBracket.Value.ToString(), out value))
{
_scanner.EatCurrentToken();
var isEnd = _scanner.GetToken();
if (isEnd.Equals("]"))
{
_scanner.EatCurrentToken();
Token t = _scanner.GetToken();
ade = new ArrayDeclExpr(tokenType, t, value);
return ade;
}
}
else
{
_scanner.EatCurrentToken();
Token t = _scanner.GetToken();
ade = new ArrayDeclExpr(tokenType, t);
return ade;
}
}
}
}
if (ade != null)
{
SymbolTable.CreateInstance().AddTokenToScope(expStack, ade);
}
}
return null;
}
internal FunctionDeclBlock(
Token returnType,
Token name)
: base(returnType, name)
{
}
internal LeafNode(Token value)
: base()
{
_value = value;
}
internal IdentifierExpression(Token token)
: this()
{
this.identifier = token;
}
internal static LeafNode CreateLeafNode(Token token)
{
return null;
}
internal IntDeclExpr(Token var, Token op, Token expr)
: base()
{
this.variableName = var;
this.theOperator = op;
this.assignmentExpression = expr;
}
internal BlockDeclExpr(
Token returnType,
Token name)
: this()
{
functionReturnType = returnType;
functionIdentifier = name;
}
internal ProgramDeclBlock(
Token name)
: base(name)
{
}
internal BlockDeclExpr(
Token name)
: this()
{
functionIdentifier = name;
}
internal ArrayDeclExpr(Token tokenType, Token tokenIdentifier)
: this()
{
this.tokenType = tokenType;
this.tokenIdentifier = tokenIdentifier;
}
internal EndFunctionExpression(Token functionName)
: this()
{
this.identifier = functionName;
}
internal void InitArrayDecl(Token initToken, int? initSize)
{
if (initToken != null && initSize != null)
{
this.tokenType = initToken;
this.size = (int)initSize;
}
}
internal void PutTokenBack(Token t)
{
_scanPointer -= ((string)t.Value).Length;
}