public static void Dec(ILGenerator il, LocalBuilder local)
{
ILEmitHelper.LoadVar(il, local);
il.Emit(OpCodes.Ldc_I4_1);
il.Emit(OpCodes.Sub);
ILEmitHelper.StormVar(il, local);
}
public static void LoadField(ILGenerator il, FieldInfo field)
{
if (field.IsLiteral)
{
object value = field.GetValue(null);
if (value is int)
{
ILEmitHelper.LoadInt(il, (int)value);
}
else if (value is float)
{
il.Emit(OpCodes.Ldc_R4, (float)value);
}
else if (value is string)
{
il.Emit(OpCodes.Ldstr, (string)value);
}
else if (value is bool)
{
bool bv = (bool)value;
if (bv)
{
il.Emit(OpCodes.Ldc_I4_1);
}
else
{
il.Emit(OpCodes.Ldc_I4_0);
}
}
else
{
throw new Exception("编译器不支持" + field.FieldType.Name + "类型");
}
}
else if (field.IsStatic)
{
il.Emit(OpCodes.Ldsfld, field);
}
else
{
il.Emit(OpCodes.Ldfld, field);
}
}
public static void LoadDefaultValue(ILGenerator il, Type type)
{
if (type == typeof(bool))
{
il.Emit(OpCodes.Ldc_I4_0);
}
else if (type == typeof(int))
{
il.Emit(OpCodes.Ldc_I4_0);
}
else if (type == typeof(float))
{
il.Emit(OpCodes.Ldc_R4, (float)0.0);
}
else if (type == typeof(double))
{
il.Emit(OpCodes.Ldc_R8, (float)0.0);
}
else if (type == typeof(string))
{
il.Emit(OpCodes.Ldstr, "");
}
else if (type == typeof(char))
{
il.Emit(OpCodes.Ldc_I4_0);
}
else
{
ConstructorInfo constructor = type.GetConstructor(new Type[] { });
if (constructor == null)
{
il.Emit(OpCodes.Ldnull);
}
else
{
ILEmitHelper.NewObj(il, constructor);
}
}
}
