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
{
/// <summary>
/// Инициализирует объект типа Script и преобрзует код сценария во внутреннее представление.
/// </summary>
/// <param name="code">Код скрипта на языке JavaScript.</param>
/// <param name="parentContext">Родительский контекст для контекста выполнения сценария.</param>
/// <param name="messageCallback">Делегат обратного вызова, используемый для вывода сообщений компилятора</param>
public Script(string code, Context parentContext, CompilerMessageCallback messageCallback, Options options)
{
if (code == null)
throw new ArgumentNullException();
Code = code;
int i = 0;
root = CodeBlock.Parse(new ParsingState(Tools.RemoveComments(code, 0), Code, messageCallback), ref i).Statement;
if (i < code.Length)
throw new System.ArgumentException("Invalid char");
CompilerMessageCallback icallback = messageCallback != null ? (level, cord, message) =>
{
messageCallback(level, CodeCoordinates.FromTextPosition(code, cord.Column, cord.Length), message);
} : null as CompilerMessageCallback;
var stat = new FunctionStatistics();
Parser.Build(ref root, 0, new System.Collections.Generic.Dictionary<string, VariableDescriptor>(), _BuildState.None, icallback, stat, options);
var body = root as CodeBlock;
Context = new Context(parentContext ?? NiL.JS.Core.Context.globalContext, true, pseudoCaller);
Context.thisBind = new GlobalObject(Context);
Context.variables = (root as CodeBlock).variables;
Context.strict = (root as CodeBlock).strict;
for (i = body.localVariables.Length; i-- > 0; )
{
var f = Context.DefineVariable(body.localVariables[i].name);
body.localVariables[i].cacheRes = f;
body.localVariables[i].cacheContext = Context;
if (body.localVariables[i].Inititalizator != null)
f.Assign(body.localVariables[i].Inititalizator.Evaluate(Context));
if (body.localVariables[i].isReadOnly)
body.localVariables[i].cacheRes.attributes |= JSObjectAttributesInternal.ReadOnly;
body.localVariables[i].captured |= stat.ContainsEval;
}
var bd = body as CodeNode;
body.Optimize(ref bd, null, icallback, options, stat);
}
internal override bool Build(ref CodeNode _this, int depth, System.Collections.Generic.Dictionary<string, VariableDescriptor> variables, _BuildState state, CompilerMessageCallback message, FunctionStatistics statistic, Options opts)
{
return false;
}
internal override void Optimize(ref CodeNode _this, FunctionExpression owner, CompilerMessageCallback message, Options opts, FunctionStatistics statistic)
{
// do nothing
}
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
{
