public static string ParsePath(Parser.State state)
{
StringBuilder pathBuilder = new StringBuilder();
while (true)
{
if (state.GetToken().Type != TokenType.Identifier)
{
state.ErrorCode = (uint)ErrorCodes.P_IdentifierExpected;
state.ErrorMessage =
$"Expected path name(<identifier>) " +
$"but <{state.GetToken().SubType.ToString()}> " +
$"were given";
return(null);
}
pathBuilder.Append(state.GetToken().Value);
if (state.GetNextNEToken().SubType == TokenSubType.Colon)
{
pathBuilder.Append(":");
state.GetNextNEToken();
continue;
}
break;
}
return(pathBuilder.ToString());
}
private static bool ParseUse(Parser.State state, CoreNode coreNode)
{
if (state.IsErrorOccured())
{
return(false);
}
if (state.GetToken().Type != TokenType.CompilerDirective)
{
return(false);
}
if (state.GetToken().Value != "#use")
{
return(false);
}
state.GetNextNEToken();
Console.WriteLine("[P] #use directive found");
string usePath = TypeParser.ParsePath(state);
string useAlias = null;
if (state.IsErrorOccured())
{
return(false);
}
if (state.GetToken().Is(TokenType.Identifier, "as"))
{
state.GetNextNEToken();
useAlias = TypeParser.ParsePath(state);
if (state.IsErrorOccured())
{
return(false);
}
}
coreNode.UsesNodes.Add(new UseNode(usePath, useAlias));
return(true);
}
public static BlockNode ParseBlock(Parser.State state)
{
if (!state.GetToken().Is(TokenSubType.BraceCurlyLeft, "{"))
{
return(null);
}
var block = new BlockNode();
state.GetNextNEToken();
while (!state.GetToken().Is(TokenSubType.BraceCurlyRight, "}"))
{
block.Code.Add(ExpressionParser.Parse(state));
if (state.IsErrorOccured())
{
return(block);
}
}
state.GetNextNEToken();
return(block);
}
public static void ParseParametersList(Parser.State state, FunctionNode function)
{
while (!state.GetToken().Is(TokenSubType.BraceRoundRight, ")"))
{
if (state.GetToken().Type != TokenType.Identifier)
{
state.ErrorCode = (uint)ErrorCodes.P_IdentifierExpected;
state.ErrorMessage =
$"Expected parameter name(<identifier>) " +
$"but <{state.GetToken().SubType}>({state.GetToken().Value}) " +
$"were given";
return;
}
var parameterName = state.GetTokenAndMoveNE().Value;
if (!state.GetToken().Is(TokenSubType.Colon, ":"))
{
state.ErrorCode = (uint)ErrorCodes.P_ColonBeforeTypeSpeceficationNotFound;
state.ErrorMessage =
$"Expected <Colon>(:) before parameter type specification " +
$"but <{state.GetToken().SubType}>({state.GetToken().Value}) were given";
return;
}
state.GetNextNEToken();
var parameterType = TypeParser.Parse(state);
function.Parameters.Add(new VariableNode
{
Name = parameterName,
Type = parameterType
});
if (state.GetToken().SubType == TokenSubType.Comma)
{
state.GetNextNEToken();
}
}
state.GetNextNEToken();
}
public static TypeNode Parse(Parser.State state)
{
state.Save();
TypeNode type = new TypeNode();
while (true)
{
var tok = state.GetToken();
if (tok.Is(TokenType.Identifier, "const"))
{
if (type.IsConstant)
{
state.ErrorCode = (uint)ErrorCodes.P_DuplicatedModifier;
state.ErrorMessage =
"<const> type modifier can not be used twice" +
" for the same type";
return(null);
}
type.IsConstant = true;
}
else if (tok.Is(TokenType.Identifier, "ref"))
{
state.GetNextNEToken();
type.IsReference = true;
type.ReferenceType = Parse(state);
if (type.IsConstant)
{
state.ErrorCode = (uint)ErrorCodes.P_ReferenceCanNotBeConstant;
state.ErrorMessage =
"Reference can not have a constant modifier:\n" +
type.ToString();
}
return(type);
}
else if (tok.Is(TokenSubType.BraceSquareLeft, "["))
{
state.GetNextNEToken();
type.IsArrayType = true;
// TODO: Parse sizes
if (!state.GetToken().Is(TokenSubType.BraceSquareRight, "]"))
{
state.ErrorCode = 999;
state.ErrorMessage =
"Array does not support sizes and dimmensions " +
"in the current version";
return(type);
}
state.GetNextNEToken();
type.ReferenceType = Parse(state);
if (type.ReferenceType.IsReference)
{
state.ErrorCode = (uint)ErrorCodes.P_ArrayCanNotContainReferences;
state.ErrorMessage =
"Array can not consist of references";
}
return(type);
}
else
{
// End of modifiers
break;
}
state.GetNextNEToken();
}
type.TypePath = ParsePath(state);
return(type);
}
private static bool ParseFunctionDeclaration(Parser.State state, CoreNode coreNode)
{
state.Save();
if (state.GetToken().Type != TokenType.Identifier)
{
state.Restore();
return(false);
}
string name = state.GetTokenAndMoveNE().Value;
if (!state.GetToken().Is(TokenSubType.Colon, ":"))
{
state.ErrorCode = (uint)ErrorCodes.P_ColonBeforeTypeSpeceficationNotFound;
state.ErrorMessage =
$"Expected <Colon>(:) before function type specification " +
$"but <{state.GetToken().SubType}>({state.GetToken().Value}) were given";
return(false);
}
state.GetNextNEToken();
TypeNode type = TypeParser.Parse(state);
if (state.IsErrorOccured())
{
return(false);
}
/*
* // Only for class methods
* bool isInstance = state.GetToken().Is(TokenSubType.Dot, ".");
* bool isStatic = state.GetToken().Is(TokenSubType.Colon, ":");
*
* if (!(isStatic || isInstance))
* {
* state.ErrorCode = (uint)ErrorCodes.P_MethodTypeExpected;
* state.ErrorMessage =
* $"Expected '.' or ':' as type modifier, but " +
* $"<{state.GetToken().SubType.ToString()}> were found";
* return false;
* }
*/
FunctionNode function = new FunctionNode
{
Parent = coreNode,
Name = name,
Type = FunctionNode.EType.Static,
ReturnType = type
};
coreNode.FunctionNodes.Add(function);
if (!state.GetToken().Is(TokenSubType.BraceRoundLeft, "("))
{
state.ErrorCode = (uint)ErrorCodes.P_OpeningBracketExpected;
state.ErrorMessage =
$"Opening round bracket is expected before parameters list " +
$"but <{state.GetToken().SubType}> were given";
return(false);
}
state.GetNextNEToken();
FunctionParser.ParseParametersList(state, function);
if (state.IsErrorOccured())
{
return(true);
}
// FunctionParser.ParseTemplateValues(state, function);
function.Code = CodeParser.Parse(state);
return(!state.IsErrorOccured());
}