Index - R
| red | Yi.Style |
| Regex | Yi.Regex |
| RegexContext | Yi.Regex |
| regexEscapeString | Yi.Regex |
| RegexLike | Yi.Regex |
| RegexMaker | Yi.Regex |
| RegexOptions | Yi.Regex |
| regexStyle | Yi.Style |
| Region | Yi.Region |
| regionDirection | Yi.Region |
| regionEnd | Yi.Region |
| regionFirst | Yi.Region |
| regionIsEmpty | Yi.Region |
| regionLast | Yi.Region |
| regionSize | Yi.Region |
| regionsOverlap | Yi.Region |
| regionStart | Yi.Region |
| Report | Yi.Lexer.Compilation |
| Res | Yi.Lexer.JavaScript |
| Reserved | |
| 1 (Data Constructor) | Yi.Lexer.Abella |
| 2 (Type/Class) | Yi.Lexer.Abella |
| 3 (Data Constructor) | Yi.Lexer.Haskell |
| 4 (Type/Class) | Yi.Lexer.JavaScript |
| 5 (Data Constructor) | Yi.Lexer.OCaml |
| ReservedOp | |
| 1 (Data Constructor) | Yi.Lexer.Abella |
| 2 (Type/Class) | Yi.Lexer.Abella |
| 3 (Data Constructor) | Yi.Lexer.Haskell |
| 4 (Data Constructor) | Yi.Lexer.OCaml |
| ReservedType | Yi.Lexer.Haskell |
| Return' | Yi.Lexer.JavaScript |
| reverseAttr | Yi.Style |
| reverseDir | Yi.Buffer.Basic |
| Rex | Yi.Lexer.JavaScript |
| RGB | Yi.Style |
| RightArrow | |
| 1 (Data Constructor) | Yi.Lexer.Abella |
| 2 (Data Constructor) | Yi.Lexer.Haskell |
| rightAssoc | Yi.Regex |
| RightShift' | Yi.Lexer.JavaScript |
| RightShiftZ' | Yi.Lexer.JavaScript |