Switch to parameter name based comments. (#3143)

toolchain/lexer/tokenized_buffer.cpp

@@ -108,39 +108,39 @@ static auto ScanForIdentifierPrefix(llvm::StringRef text) -> llvm::StringRef {
   //
   // bits 4-7 remain unused if we need to classify more characters.
   const auto high_lut = _mm_setr_epi8(
-      /*0x0:*/ 0b0000'0000,
-      /*0x1:*/ 0b0000'0000,
-      /*0x2:*/ 0b0000'0000,
-      /*0x3:*/ 0b0000'0010,
-      /*0x4:*/ 0b0000'0100,
-      /*0x5:*/ 0b0000'1001,
-      /*0x6:*/ 0b0000'0100,
-      /*0x7:*/ 0b0000'1000,
-      /*0x8:*/ 0b0000'0000,
-      /*0x9:*/ 0b0000'0000,
-      /*0xA:*/ 0b0000'0000,
-      /*0xB:*/ 0b0000'0000,
-      /*0xC:*/ 0b0000'0000,
-      /*0xD:*/ 0b0000'0000,
-      /*0xE:*/ 0b0000'0000,
-      /*0xF:*/ 0b0000'0000);
+      /* __b0=*/0b0000'0000,
+      /* __b1=*/0b0000'0000,
+      /* __b2=*/0b0000'0000,
+      /* __b3=*/0b0000'0010,
+      /* __b4=*/0b0000'0100,
+      /* __b5=*/0b0000'1001,
+      /* __b6=*/0b0000'0100,
+      /* __b7=*/0b0000'1000,
+      /* __b8=*/0b0000'0000,
+      /* __b9=*/0b0000'0000,
+      /*__b10=*/0b0000'0000,
+      /*__b11=*/0b0000'0000,
+      /*__b12=*/0b0000'0000,
+      /*__b13=*/0b0000'0000,
+      /*__b14=*/0b0000'0000,
+      /*__b15=*/0b0000'0000);
   const auto low_lut = _mm_setr_epi8(
-      /*0x0:*/ 0b0000'1010,
-      /*0x1:*/ 0b0000'1110,
-      /*0x2:*/ 0b0000'1110,
-      /*0x3:*/ 0b0000'1110,
-      /*0x4:*/ 0b0000'1110,
-      /*0x5:*/ 0b0000'1110,
-      /*0x6:*/ 0b0000'1110,
-      /*0x7:*/ 0b0000'1110,
-      /*0x8:*/ 0b0000'1110,
-      /*0x9:*/ 0b0000'1110,
-      /*0xA:*/ 0b0000'1100,
-      /*0xB:*/ 0b0000'0100,
-      /*0xC:*/ 0b0000'0100,
-      /*0xD:*/ 0b0000'0100,
-      /*0xE:*/ 0b0000'0100,
-      /*0xF:*/ 0b0000'0101);
+      /* __b0=*/0b0000'1010,
+      /* __b1=*/0b0000'1110,
+      /* __b2=*/0b0000'1110,
+      /* __b3=*/0b0000'1110,
+      /* __b4=*/0b0000'1110,
+      /* __b5=*/0b0000'1110,
+      /* __b6=*/0b0000'1110,
+      /* __b7=*/0b0000'1110,
+      /* __b8=*/0b0000'1110,
+      /* __b9=*/0b0000'1110,
+      /*__b10=*/0b0000'1100,
+      /*__b11=*/0b0000'0100,
+      /*__b12=*/0b0000'0100,
+      /*__b13=*/0b0000'0100,
+      /*__b14=*/0b0000'0100,
+      /*__b15=*/0b0000'0101);
 
   // Use `ssize_t` for performance here as we index memory in a tight loop.
   ssize_t i = 0;