static FieldInfo GetBackingField(MethodInfo method, ILPattern pattern)
{
var result = ILPattern.Match(method, pattern);
if (!result.success)
{
throw new ArgumentException();
}
object value;
if (!result.TryGetData(FieldPattern.FieldKey, out value))
{
throw new InvalidOperationException();
}
return((FieldInfo)value);
}
public static MatchContext Match(MethodBase method, ILPattern pattern)
{
if (method == null)
{
throw new ArgumentNullException("method");
}
if (pattern == null)
{
throw new ArgumentNullException("pattern");
}
var instructions = method.GetInstructions();
if (instructions.Count == 0)
{
throw new ArgumentException();
}
var context = new MatchContext(instructions[0]);
pattern.Match(context);
return(context);
}
static ILPattern Field(OpCode opcode)
{
return(new FieldPattern(ILPattern.OpCode(opcode)));
}
public FieldPattern(ILPattern pattern)
{
_pattern = pattern;
}
public static ILPattern Either(ILPattern a, ILPattern b)
{
return(new EitherPattern(a, b));
}
public OptionalPattern(ILPattern optional)
{
_pattern = optional;
}
public static ILPattern Optional(ILPattern pattern)
{
return(new OptionalPattern(pattern));
}
public EitherPattern(ILPattern a, ILPattern b)
{
_a = a;
_b = b;
}