patterns/includes: Update standard library and patterns to support the new bitfields (#102)

* Add `current_bit_offset()` and `read_bits(...)` to `std::mem`

* Replace deprecated BitfieldOrder enum values with new clearer names

This adds new options named `MostToLeastSignificant` and `LeastToMostSignificant` to replace the old `LeftToRight` and `RightToLeft` names. These names should be much clearer about what they affect and how.

* Throw errors when `std::core::(get|set)_bitfield_order()` are called

* Update all patterns to work with the new bitfield behaviors

patterns/protobuf.hexpat

@@ -1,66 +1,67 @@
-#include <std/mem.pat>
-
-#include <type/leb128.pat>
-
-struct ZigZag32 {
-	u32 value;
-} [[sealed, format("format_zigzag32")]];
-
-fn format_zigzag32(ZigZag32 zigzag) {
-	return s32((s32(zigzag.value) << 1) ^ (s32(zigzag.value) >> 31));
-};
-
-struct ZigZag64 {
-	u64 value;
-} [[sealed, format("format_zigzag64")]];
-
-fn format_zigzag64(ZigZag64 zigzag) {
-	return s64((s64(zigzag.value) << 1) ^ (s64(zigzag.value) >> 63));
-};
-
-enum WireType : u8 {
-	Varint 			= 0,
-	_64Bit 			= 1,
-	LengthDelimited = 2,
-	StartGroup 		= 3,
-	EndGroup 		= 4,
-	_32Bit 			= 5
-};
-
-bitfield Key {
-	field_number : 5;
-	wire_type    : 3;
-} [[left_to_right]];
-
-union _64Bit {
-	u64 fixed64;
-	ZigZag64 sfixed64;
-	double dbl;
-};
-
-union _32Bit {
-	u32 fixed32;
-	ZigZag32 sfixed32;
-	float flt;
-};
-
-struct LengthDelimited {
-	type::LEB128 length;
-	char data[length];
-};
-
-
-struct Entry {
-	Key key;
-	
-	if (key.wire_type == WireType::Varint)
-		type::LEB128 value;
-	else if (key.wire_type == WireType::_64Bit)
-		_64Bit value;
-	else if (key.wire_type == WireType::LengthDelimited)
-		LengthDelimited value;
-	else if (key.wire_type == WireType::_32Bit)
-		_32Bit value;
-};
-
-Entry entries[while(!std::mem::eof())] @ 0x00;
+#include <std/core.pat>
+#include <std/mem.pat>
+
+#include <type/leb128.pat>
+
+struct ZigZag32 {
+	u32 value;
+} [[sealed, format("format_zigzag32")]];
+
+fn format_zigzag32(ZigZag32 zigzag) {
+	return s32((s32(zigzag.value) << 1) ^ (s32(zigzag.value) >> 31));
+};
+
+struct ZigZag64 {
+	u64 value;
+} [[sealed, format("format_zigzag64")]];
+
+fn format_zigzag64(ZigZag64 zigzag) {
+	return s64((s64(zigzag.value) << 1) ^ (s64(zigzag.value) >> 63));
+};
+
+enum WireType : u8 {
+	Varint 			= 0,
+	_64Bit 			= 1,
+	LengthDelimited = 2,
+	StartGroup 		= 3,
+	EndGroup 		= 4,
+	_32Bit 			= 5
+};
+
+bitfield Key {
+	field_number : 5;
+	wire_type    : 3;
+} [[bitfield_order(std::core::BitfieldOrder::MostToLeastSignificant, 8)]];
+
+union _64Bit {
+	u64 fixed64;
+	ZigZag64 sfixed64;
+	double dbl;
+};
+
+union _32Bit {
+	u32 fixed32;
+	ZigZag32 sfixed32;
+	float flt;
+};
+
+struct LengthDelimited {
+	type::LEB128 length;
+	char data[length];
+};
+
+
+struct Entry {
+	Key key;
+	
+	if (key.wire_type == WireType::Varint)
+		type::LEB128 value;
+	else if (key.wire_type == WireType::_64Bit)
+		_64Bit value;
+	else if (key.wire_type == WireType::LengthDelimited)
+		LengthDelimited value;
+	else if (key.wire_type == WireType::_32Bit)
+		_32Bit value;
+};
+
+Entry entries[while(!std::mem::eof())] @ 0x00;