public Type Visit(Int_Literal node)
{
var tempInt = node.AnchorToken.Lexeme;
try
{
Convert.ToInt32(tempInt);
}
catch (OverflowException)
{
throw new SemanticError("Integer literal: " + tempInt + " too large ", node.AnchorToken);
}
return(Type.INT);
}
public Node SimpleExpression()
{
switch (CurrentToken)
{
case TokenCategory.PARENTHESIS_OPEN:
Expect(TokenCategory.PARENTHESIS_OPEN);
var expr = Expression();
Expect(TokenCategory.PARENTHESIS_CLOSE);
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var result = new ListItem();
result.Add(expr);
auxiliarMethod(result);
return(result);
}
else
{
return(expr);
}
case TokenCategory.IDENTIFIER:
var identifier = Expect(TokenCategory.IDENTIFIER);
if (CurrentToken == TokenCategory.PARENTHESIS_OPEN)
{
var result = Call();
result.AnchorToken = identifier;
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var call = new ListItem();
call.Add(result);
auxiliarMethod(call);
return(call);
}
else
{
return(result);
}
}
else
{
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var listI = new ListItem();
listI.Add(new Identifier()
{
AnchorToken = identifier
});
auxiliarMethod(listI);
return(listI);
}
else
{
var id = new Identifier()
{
AnchorToken = identifier
};
return(id);
}
}
case TokenCategory.INT_LITERAL:
var iLiteral = new Int_Literal()
{
AnchorToken = Expect(TokenCategory.INT_LITERAL)
};
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var listI = new ListItem();
listI.Add(iLiteral);
auxiliarMethod(listI);
return(listI);
}
else
{
return(iLiteral);
}
case TokenCategory.STR_LITERAL:
var sLiteral = new Str_Literal()
{
AnchorToken = Expect(TokenCategory.STR_LITERAL)
};
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var listI = new ListItem();
listI.Add(sLiteral);
auxiliarMethod(listI);
return(listI);
}
else
{
return(sLiteral);
}
case TokenCategory.TRUE:
var tLiteral = new True()
{
AnchorToken = Expect(TokenCategory.TRUE)
};
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var listI = new ListItem();
listI.Add(tLiteral);
auxiliarMethod(listI);
return(listI);
}
else
{
return(tLiteral);
}
case TokenCategory.FALSE:
var fLiteral = new False()
{
AnchorToken = Expect(TokenCategory.FALSE)
};
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var listI = new ListItem();
listI.Add(fLiteral);
auxiliarMethod(listI);
return(listI);
}
else
{
return(fLiteral);
}
case TokenCategory.BRACE_OPEN:
var list = List();
if (CurrentToken == TokenCategory.BRACKET_OPEN)
{
var listI = new ListItem();
listI.Add(list);
auxiliarMethod(listI);
return(listI);
}
else
{
return(list);
}
default:
throw new SyntaxError(firstOfSimpleExpression,
tokenStream.Current);
}
}
