Beispiel #1
0
        internal override bool Build(ref CodeNode _this, int depth, Dictionary<string, VariableDescriptor> variables, _BuildState state, CompilerMessageCallback message, FunctionStatistics statistic, Options opts)
        {
            depth = System.Math.Max(1, depth);
            Parser.Build(ref body, depth, variables, state | _BuildState.InLoop, message, statistic, opts);
            Parser.Build(ref condition, 2, variables, state | _BuildState.InLoop, message, statistic, opts);
            try
            {
                if (allowRemove
                    && (opts & Options.SuppressUselessExpressionsElimination) == 0
                    && (condition is Constant || (condition as Expressions.Expression).IsContextIndependent))
                {
                    if ((bool)condition.Evaluate(null))
                        _this = new InfinityLoop(body, labels);
                    else if (labels.Length == 0)
                        _this = body;
                    condition.Eliminated = true;
                }
            }

#if PORTABLE
            catch
            {
Beispiel #2
0
 protected override EP_VP1 Visit(InfinityLoop node)
 {
     node.Body.Visit(this);
     return(this);
 }
Beispiel #3
0
 internal protected virtual T Visit(InfinityLoop node)
 {
     return(Visit(node as CodeNode));
 }
Beispiel #4
0
        internal override bool Build(ref CodeNode _this, int depth, Dictionary<string, VariableDescriptor> variables, _BuildState state, CompilerMessageCallback message, FunctionStatistics statistic, Options opts)
        {
            depth = System.Math.Max(1, depth);
            Parser.Build(ref body, depth, variables, state | _BuildState.Conditional | _BuildState.InLoop, message, statistic, opts);
            Parser.Build(ref condition, 2, variables, state | _BuildState.InLoop, message, statistic, opts);
            if ((opts & Options.SuppressUselessExpressionsElimination) == 0 && condition is ToBool)
            {
                if (message == null)
                    message(MessageLevel.Warning, new CodeCoordinates(0, condition.Position, 2), "Useless conversion. Remove double negation in condition");
                condition = (condition as Expression).first;
            }
            try
            {
                if (allowRemove && (condition is Constant || (condition is Expression && (condition as Expression).IsContextIndependent)))
                {
                    if ((bool)condition.Evaluate(null))
                    {
                        if ((opts & Options.SuppressUselessExpressionsElimination) == 0)
                            _this = new InfinityLoop(body, labels);
                    }
                    else if ((opts & Options.SuppressUselessStatementsElimination) == 0)
                    {
                        _this = null;
                        Eliminated = true;
                        body.Eliminated = true;
                    }
                    condition.Eliminated = true;
                }
                else if ((opts & Options.SuppressUselessExpressionsElimination) == 0
                        && ((condition is Json && (condition as Json).Fields.Length == 0)
                            || (condition is ArrayExpression && (condition as ArrayExpression).Elements.Count == 0)))
                {
                    _this = new InfinityLoop(body, labels);
                    condition.Eliminated = true;
                }
            }
#if PORTABLE
            catch
            {