internal static CodeNode Parse(ParseInfo state, ref int index)
{
//string code = state.Code;
int i = index;
if (!Parser.Validate(state.Code, "while (", ref i) && !Parser.Validate(state.Code, "while(", ref i))
{
return(null);
}
int labelsCount = state.LabelsCount;
state.LabelsCount = 0;
while (Tools.IsWhiteSpace(state.Code[i]))
{
i++;
}
var condition = Parser.Parse(state, ref i, CodeFragmentType.Expression);
while (i < state.Code.Length && Tools.IsWhiteSpace(state.Code[i]))
{
i++;
}
if (i >= state.Code.Length)
{
ExceptionHelper.Throw(new SyntaxError("Unexpected end of line."));
}
if (state.Code[i] != ')')
{
throw new ArgumentException("code (" + i + ")");
}
do
{
i++;
}while (i < state.Code.Length && Tools.IsWhiteSpace(state.Code[i]));
if (i >= state.Code.Length)
{
ExceptionHelper.Throw(new SyntaxError("Unexpected end of line."));
}
state.AllowBreak.Push(true);
state.AllowContinue.Push(true);
int ccs = state.continiesCount;
int cbs = state.breaksCount;
var body = Parser.Parse(state, ref i, 0);
if (body is FunctionDefinition)
{
if (state.strict)
{
ExceptionHelper.Throw((new NiL.JS.BaseLibrary.SyntaxError("In strict mode code, functions can only be declared at top level or immediately within another function.")));
}
if (state.message != null)
{
state.message(MessageLevel.CriticalWarning, CodeCoordinates.FromTextPosition(state.Code, body.Position, body.Length), "Do not declare function in nested blocks.");
}
body = new CodeBlock(new[] { body }); // для того, чтобы не дублировать код по декларации функции,
// она оборачивается в блок, который сделает самовыпил на втором этапе, но перед этим корректно объявит функцию.
}
state.AllowBreak.Pop();
state.AllowContinue.Pop();
var pos = index;
index = i;
return(new While()
{
allowRemove = ccs == state.continiesCount && cbs == state.breaksCount,
body = body,
condition = condition,
labels = state.Labels.GetRange(state.Labels.Count - labelsCount, labelsCount).ToArray(),
Position = pos,
Length = index - pos
});
}
internal static CodeNode Parse(ParseInfo state, ref int index)
{
int i = index;
if (!Parser.Validate(state.Code, "throw", ref i) || (!Parser.IsIdentifierTerminator(state.Code[i])))
{
return(null);
}
while (i < state.Code.Length && Tools.IsWhiteSpace(state.Code[i]) && !Tools.IsLineTerminator(state.Code[i]))
{
i++;
}
var b = state.Code[i] == ';' || Tools.IsLineTerminator(state.Code[i]) ? null : (Expression)Parser.Parse(state, ref i, CodeFragmentType.Expression);
if (b is Empty)
{
ExceptionHelper.Throw((new SyntaxError("Can't throw result of EmptyStatement " + CodeCoordinates.FromTextPosition(state.Code, i - 1, 0))));
}
var pos = index;
index = i;
return(new Throw(b)
{
Position = pos,
Length = index - pos
});
}