/// <summary>
/// Function call context (with closures)
/// </summary>
/// <param name="name2ndx">Value name -> index</param>
/// <param name="values">Values array</param>
/// <param name="callerCtx">Calling context</param>
/// <param name="args">Arguments array</param>
/// <param name="declCtx">Context in which function is declared (for closures)</param>
/// <param name="valuesNdx">Descriptor of function context values:
/// -(k+1) = value from caller context;
/// 0 = local value (from current context);
/// +(k+1) = value from declaration context (closures emulation).
/// </param>
public AsyncExprCtx(IDictionary <string, int> name2ndx, IList values, IList args,
AsyncExprCtx callerCtx, AsyncExprCtx declCtx,
IList <int> valuesNdx)
{
this.name2ndx = name2ndx;
int n = values.Count;
ctxValues = new CtxValue[n];
for (int i = 0; i < valuesNdx.Count; i++)
{
int j = valuesNdx[i];
if (j < 0)
{
ctxValues[i] = new CtxValue(args[~j], callerCtx);
}
else if (j > 0)
{
ctxValues[i] = new CtxValue(declCtx, j - 1);
}
else
{
ctxValues[i] = new CtxValue(values[i]);
}
}
parent = callerCtx;
}
/// <summary>
/// Function call context
/// </summary>
public AsyncExprCtx(Generator.Ctx funcCtx, AsyncExprCtx callerCtx, IList args, int nArgs)
{
if (funcCtx.parent != null)
{
Trace.Assert(funcCtx.parent.name2ndx == callerCtx.name2ndx);
}
else
{
Trace.Assert(funcCtx.values.Count == nArgs);
}
this.name2ndx = funcCtx.name2ndx;
var values = funcCtx.values;
int n = values.Count;
ctxValues = new CtxValue[n];
//int nArgs = args.Count;
for (int i = 0; i < nArgs; i++)
{
ctxValues[i] = new CtxValue(args[i], callerCtx);
}
for (int i = nArgs; i < n; i++)
{
ctxValues[i] = new CtxValue(values[i]);
}
parent = callerCtx;
}
/// <summary>
/// New independent context
/// </summary>
/// <param name="name2ndx">names index</param>
/// <param name="values">values list</param>
protected AsyncExprCtx(IDictionary <string, int> name2ndx, IList values)
{
this.name2ndx = name2ndx;
int n = values.Count;
ctxValues = new CtxValue[n];
for (int i = 0; i < n; i++)
{
ctxValues[i] = new CtxValue(values[i]);
}
}
/// <summary>
/// Context for next loop iteration
/// </summary>
/// <param name="prevIterationContext"></param>
/// <param name="nextIterationValues"></param>
/// <param name="ndxOfValsToCalc"></param>
public AsyncExprCtx(AsyncExprCtx prevIterationContext, IList nextIterationValues, IEnumerable <int> ndxOfValsToCalc)
{
int n = nextIterationValues.Count;
name2ndx = prevIterationContext.name2ndx;
parent = prevIterationContext.parent;
Trace.Assert(parent != null);
ctxValues = new CtxValue[n];
for (int i = 0; i < n; i++)
{
ctxValues[i] = prevIterationContext.ctxValues[i];
}
foreach (int i in ndxOfValsToCalc)
{
if (i < 0)
{
ctxValues[~i] = new CtxValue(nextIterationValues[~i], prevIterationContext);
}
else
{
ctxValues[i] = new CtxValue(nextIterationValues[i]);
}
}
}