/// <summary>
/// Analyze the function call (isMemberOf == null).
/// </summary>
/// <param name="analyzer"></param>
/// <param name="info"></param>
/// <returns></returns>
/// <remarks>This code fragment is separated to save the stack when too long Expression chain is being compiled.</remarks>
private Evaluation AnalyzeFunctionCall(Analyzer/*!*/ analyzer, ref ExInfoFromParent info)
{
Debug.Assert(isMemberOf == null);
// resolve name:
routine = analyzer.ResolveFunctionName(qualifiedName, position);
if (routine.IsUnknown)
{
// note: we've to try following at run time, there can be dynamically added namespaced function matching qualifiedName
// try fallback
if (this.fallbackQualifiedName.HasValue)
{
var fallbackroutine = analyzer.ResolveFunctionName(this.fallbackQualifiedName.Value, position);
if (fallbackroutine != null && !fallbackroutine.IsUnknown)
{
if (fallbackroutine is PhpLibraryFunction) // we are calling library function directly
routine = fallbackroutine;
}
}
if (routine.IsUnknown) // still unknown ?
Statistics.AST.AddUnknownFunctionCall(qualifiedName);
}
// resolve overload if applicable:
RoutineSignature signature;
overloadIndex = routine.ResolveOverload(analyzer, callSignature, position, out signature);
Debug.Assert(overloadIndex != DRoutine.InvalidOverloadIndex, "A function should have at least one overload");
if (routine is PhpLibraryFunction)
{
var opts = ((PhpLibraryFunction)routine).Options;
// warning if not supported function call is detected
if ((opts & FunctionImplOptions.NotSupported) != 0)
analyzer.ErrorSink.Add(Warnings.NotSupportedFunctionCalled, analyzer.SourceUnit, Position, QualifiedName.ToString());
// warning if function requiring locals is detected (performance critical)
if ((opts & FunctionImplOptions.NeedsVariables) != 0 && !analyzer.CurrentScope.IsGlobal)
analyzer.ErrorSink.Add(Warnings.UnoptimizedLocalsInFunction, analyzer.SourceUnit, Position, QualifiedName.ToString());
}
// analyze parameters:
callSignature.Analyze(analyzer, signature, info, false);
// get properties:
analyzer.AddCurrentRoutineProperty(routine.GetCallerRequirements());
// replaces the node if its value can be determined at compile-time:
object value;
return TryEvaluate(analyzer, out value) ?
new Evaluation(this, value) :
new Evaluation(this);
}