internal override System.Linq.Expressions.Expression TryCompile(bool selfCompile, bool forAssign, Type expectedType, List <CodeNode> dynamicValues)
{
dynamicValues.Add(this);
var res = System.Linq.Expressions.Expression.Call(
System.Linq.Expressions.Expression.ArrayAccess(JITHelpers.DynamicValuesParameter, JITHelpers.cnst(dynamicValues.Count - 1)),
forAssign ? JITHelpers.EvaluateForWriteMethod : JITHelpers.EvaluateMethod,
JITHelpers.ContextParameter
);
if (expectedType == typeof(int))
{
res = System.Linq.Expressions.Expression.Call(JITHelpers.JSObjectToInt32Method, res);
}
return(res);
}
public override bool Build(ref CodeNode _this, int expressionDepth, Dictionary <string, VariableDescriptor> variables, CodeContext codeContext, InternalCompilerMessageCallback message, FunctionInfo stats, Options opts)
{
if (built)
{
return(false);
}
built = true;
List <VariableDescriptor> variablesToRestore = null;
if (_variables != null && _variables.Length != 0)
{
for (var i = 0; i < _variables.Length; i++)
{
VariableDescriptor desc = null;
if (variables.TryGetValue(_variables[i].name, out desc) && desc.definitionScopeLevel < _variables[i].definitionScopeLevel)
{
if (variablesToRestore == null)
{
variablesToRestore = new List <VariableDescriptor>();
}
variablesToRestore.Add(desc);
}
variables[_variables[i].name] = _variables[i];
_variables[i].owner = this;
}
for (var i = 0; i < _variables.Length; i++)
{
Parser.Build(
ref _variables[i].initializer,
System.Math.Max(2, expressionDepth),
variables,
codeContext | (this._strict ? CodeContext.Strict : CodeContext.None),
message,
stats,
opts);
}
}
for (var i = 0; i < _lines.Length; i++)
{
var ed = _lines[i] as EntityDefinition;
if (ed != null && ed.Hoist)
{
_lines[i] = null;
}
}
bool unreachable = false;
for (int i = 0; i < _lines.Length; i++)
{
if (_lines[i] != null)
{
if (_lines[i] is Empty)
{
_lines[i] = null;
}
else
{
if (unreachable && message != null)
{
message(MessageLevel.CriticalWarning, _lines[i].Position, _lines[i].Length, "Unreachable code detected.");
}
var cn = _lines[i];
Parser.Build(ref cn, (codeContext & CodeContext.InEval) != 0 ? 2 : System.Math.Max(1, expressionDepth), variables, codeContext | (this._strict ? CodeContext.Strict : CodeContext.None), message, stats, opts);
if (cn is Empty)
{
_lines[i] = null;
}
else
{
_lines[i] = cn;
}
unreachable |= cn is Return || cn is Break || cn is Continue || cn is Throw;
}
}
}
int f = _lines.Length, t = _lines.Length - 1;
for (; f-- > 0;)
{
if (_lines[f] != null && _lines[t] == null)
{
_lines[t] = _lines[f];
_lines[f] = null;
}
if (_lines[t] != null)
{
t--;
}
}
if (expressionDepth > 0 && (_variables == null || _variables.Length == 0))
{
if (_lines.Length == 0)
{
_this = Empty.Instance;
}
}
else
{
if (message != null)
{
for (var i = 0; i < _variables.Length; i++)
{
if (_variables[i].ReferenceCount == 1)
{
message(
MessageLevel.Recomendation,
_variables[i].references[0].Position,
0,
"Unused variable \"" + _variables[i].name + "\"");
}
else
{
break;
}
}
}
#if (NET40 || INLINE) && JIT
compiledVersion = JITHelpers.compile(this, depth >= 0);
#endif
}
if (t >= 0 && this == _this)
{
var newBody = new CodeNode[_lines.Length - t - 1];
f = 0;
while (++t < _lines.Length)
{
newBody[f++] = _lines[t];
}
_lines = newBody;
}
if (_variables != null && _variables.Length != 0)
{
for (var i = 0; i < _variables.Length; i++)
{
variables.Remove(_variables[i].name);
}
}
if (variablesToRestore != null)
{
for (var i = 0; i < variablesToRestore.Count; i++)
{
variables[variablesToRestore[i].name] = variablesToRestore[i];
}
}
return(false);
}
