internal static CodeNode Parse(ParseInfo state, ref int index)
{
if (!Parser.Validate(state.Code, "import", ref index))
{
return(null);
}
Tools.SkipSpaces(state.Code, ref index);
var result = new ImportStatement();
var start = index;
if (!Parser.ValidateString(state.Code, ref index, true))
{
var onlyDefault = false;
if (Parser.ValidateName(state.Code, ref index))
{
var defaultAlias = state.Code.Substring(start, index - start);
result._map.Add(new KeyValuePair <string, string>("", defaultAlias));
onlyDefault = true;
Tools.SkipSpaces(state.Code, ref index);
if (state.Code[index] == ',')
{
onlyDefault = false;
index++;
Tools.SkipSpaces(state.Code, ref index);
}
}
if (!onlyDefault)
{
if (result._map.Count == 0 && state.Code[index] == '*')
{
index++;
Tools.SkipSpaces(state.Code, ref index);
var alias = parseAlias(state.Code, ref index);
if (alias == null)
{
ExceptionHelper.ThrowSyntaxError("Expected identifier", state.Code, index);
}
result._map.Add(new KeyValuePair <string, string>("*", alias));
}
else if (state.Code[index] == '{')
{
parseImportMap(result, state.Code, ref index);
}
else
{
ExceptionHelper.ThrowSyntaxError(Strings.UnexpectedToken, state.Code, index);
}
}
Tools.SkipSpaces(state.Code, ref index);
if (!Parser.Validate(state.Code, "from", ref index))
{
ExceptionHelper.ThrowSyntaxError("Expected 'from'", state.Code, index);
}
Tools.SkipSpaces(state.Code, ref index);
start = index;
if (!Parser.ValidateString(state.Code, ref index, true))
{
ExceptionHelper.ThrowSyntaxError("Expected module name", state.Code, index);
}
}
result._moduleName = Tools.Unescape(state.Code.Substring(start + 1, index - start - 2), false);
return(result);
}