public void WhenWeTokenize()
{
Token currentToken = _lexer.GetNextToken();
while (currentToken.Type != TokenType.EOF)
{
_tokenList.Add(currentToken);
currentToken = _lexer.GetNextToken();
}
_tokenList.Add(currentToken);
}
public void Parse()
{
_currentToken = _lexer.GetNextToken();
E();
if (_currentToken.Type != TokenTypes.Eof)
{
throw new SyntaxException("Se esperaba EOF");
}
}
public Parser(Lexer.Lexer lexer)
{
_lexer = lexer;
_token = _lexer.GetNextToken();
}
public void NextToken()
{
_token = _lexer.GetNextToken();
}
private SentenceNode Sentence()
{
if (currentToken.Type == TokenTypes.Int || currentToken.Type == TokenTypes.String)
{
var type = currentToken.Type;
currentToken = lexer.GetNextToken();
if (currentToken.Type == TokenTypes.Id)
{
string name = currentToken.Lexeme;
currentToken = lexer.GetNextToken();
var dimensions = Dimensions();
if (currentToken.Type == TokenTypes.Eos)
{
currentToken = lexer.GetNextToken();
return(new DeclarationNode {
Type = type, Value = name, Dimensions = dimensions
});
}
}
}
else if (currentToken.Type == TokenTypes.Read)
{
currentToken = lexer.GetNextToken();
if (currentToken.Type == TokenTypes.Id)
{
string name = currentToken.Lexeme;
currentToken = lexer.GetNextToken();
if (currentToken.Type == TokenTypes.Eos)
{
currentToken = lexer.GetNextToken();
return(new ReadNode()
{
Id = name
});
}
}
}
else if (currentToken.Type == TokenTypes.Print)
{
currentToken = lexer.GetNextToken();
var exp = E();
if (currentToken.Type == TokenTypes.Eos)
{
currentToken = lexer.GetNextToken();
return(new PrintNode {
Expression = exp
});
}
}
else if (currentToken.Type == TokenTypes.Id)
{
var idNode = Id();
if (currentToken.Type == TokenTypes.Equal)
{
currentToken = lexer.GetNextToken();
var exp = E();
if (currentToken.Type == TokenTypes.Eos)
{
currentToken = lexer.GetNextToken();
return(new AssignNode {
Id = idNode, Expression = exp
});
}
}
else if (currentToken.Type == TokenTypes.Id)
{
var name = currentToken.Lexeme;
currentToken = lexer.GetNextToken();
if (currentToken.Type == TokenTypes.Eos)
{
currentToken = lexer.GetNextToken();
return(new StructNode {
Value = name, StructType = idNode.Value
});
}
}
}
else if (currentToken.Type == TokenTypes.Struct)
{
currentToken = lexer.GetNextToken();
return(DeclareStruct());
}
throw new SyntaxErrorException();
}