private AstItem ReadFuncDecl(TokenIterator tokens)
{
//Skip "fn"
tokens.Pop();
var next = tokens.Current();
if (next.Kind == TokenKind.Ext)
{
return(ReadExternFuncDecl(tokens));
}
var name = tokens.PopExpected(TokenKind.Word);
tokens.PopExpected(TokenKind.RoundBracketOpen);
var parameters = ReadFuncParameters(tokens);
DataType returnType = DataType.VOID;
next = tokens.Pop();
if (next.Kind == TokenKind.TypeOperator)
{
returnType = ReadDataType(tokens);
next = tokens.Pop();
}
if (next.Kind != TokenKind.CurlyBracketOpen)
{
throw new Exception("Expected ':' or '{', found " + next);
}
var statements = ReadStatements(tokens);
tokens.PopExpected(TokenKind.CurlyBracketClose);
return(AstItem.FunctionDecl(name.Value, returnType, parameters, statements));
}