private static void ProcessNameOfCallInstruction(Instruction instruction, ILProcessor ilProcessor)
{
var instructions = instruction.AsReverseEnumerable().Take(patterns.Value.First().Length).ToArray(); // Take an instruction set with a maximum size of the longest pattern.
Boolean possibleMatch = false;
PatternInstruction[] patternMatched = null;
Func <String> terminal = null;
foreach (var pattern in patterns.Value)
{
possibleMatch = true;
terminal = null;
for (Int32 i = 0, j = 0; i < pattern.Length && j < instructions.Length; ++i, ++j)
{
while (pattern[i] is OptionalPatternInstruction && !pattern[i].EligibleOpCodes.Contains(instructions[j].OpCode))
{
++i;
}
var patternInstruction = pattern[i];
var currentInstruction = instructions[j];
if (patternInstruction.EligibleOpCodes.Contains(currentInstruction.OpCode) && patternInstruction.IsPredicated(currentInstruction, ilProcessor))
{
if (patternInstruction.Terminal != null && terminal == null)
{
terminal = () => patternInstruction.Terminal(currentInstruction, ilProcessor);
}
if (patternInstruction.Action != null)
{
patternInstruction.Action(currentInstruction);
}
}
else
{
possibleMatch = false;
break;
}
}
if (possibleMatch && pattern.Count(x => !(x is OptionalPatternInstruction)) <= instructions.Length)
{
patternMatched = pattern;
break;
}
}
if (!possibleMatch)
{
throw GetNotSupportedException(instruction); // The usage of Name.Of is not supported
}
if (terminal == null)
{
throw new NotImplementedException("There is no terminal expression implemented for the matched pattern.");
}
String name;
try {
name = terminal();
if (IsNullOrWhiteSpace(name))
{
throw new Exception("Name not found.");
}
}
catch {
throw GetNotSupportedException(instruction);
}
// TODO: Remove the anonymous methods generated by lamdba expressions in some uses of Name.Of...
ilProcessor.InsertAfter(instruction, Instruction.Create(OpCodes.Ldstr, name));
for (Int32 i = 0, j = 0; i < patternMatched.Length && j < instructions.Length; ++i, ++j)
{
while (patternMatched[i] is OptionalPatternInstruction && !patternMatched[i].EligibleOpCodes.Contains(instructions[j].OpCode))
{
++i;
}
ilProcessor.Remove(instructions[j]);
}
}