public static CodeMetric For(MethodBase method)
{
Throw.IfArgumentNull(method, "method");
var methodBody = method.ToDefinition().Body;
var methodInstructions = methodBody.Instructions;
var ccInstructions =
from instruction in methodInstructions
where (
CcBranchOpCodes.Contains(instruction.OpCode) ||
instruction.OpCode == OpCodes.Switch ||
instruction.OpCode == OpCodes.Ret
)
select instruction;
Func<Instruction, int> ccWeight = instruction =>
instruction.OpCode == OpCodes.Switch
? ((Instruction[])instruction.Operand).Length
: 1;
var ccCatchs = methodBody.ExceptionHandlers.Count(c => c.CatchType != null);
var value = ccInstructions.Sum(ccWeight) + ccCatchs;
return new Cc(value);
}