diff options
Diffstat (limited to 'vendor/github.com/rivo/uniseg/wordrules.go')
| -rw-r--r-- | vendor/github.com/rivo/uniseg/wordrules.go | 160 |
1 files changed, 98 insertions, 62 deletions
diff --git a/vendor/github.com/rivo/uniseg/wordrules.go b/vendor/github.com/rivo/uniseg/wordrules.go index 325407e40..57a8c6831 100644 --- a/vendor/github.com/rivo/uniseg/wordrules.go +++ b/vendor/github.com/rivo/uniseg/wordrules.go @@ -22,82 +22,121 @@ const ( wbZWJBit = 16 // This bit is set for any states followed by at least one zero-width joiner (see WB4 and WB3c). ) -// The word break parser's breaking instructions. -const ( - wbDontBreak = iota - wbBreak -) - -// The word break parser's state transitions. It's anologous to grTransitions, -// see comments there for details. Unicode version 14.0.0. -var wbTransitions = map[[2]int][3]int{ +// wbTransitions implements the word break parser's state transitions. It's +// anologous to [grTransitions], see comments there for details. +// +// Unicode version 15.0.0. +func wbTransitions(state, prop int) (newState int, wordBreak bool, rule int) { + switch uint64(state) | uint64(prop)<<32 { // WB3b. - {wbAny, prNewline}: {wbNewline, wbBreak, 32}, - {wbAny, prCR}: {wbCR, wbBreak, 32}, - {wbAny, prLF}: {wbLF, wbBreak, 32}, + case wbAny | prNewline<<32: + return wbNewline, true, 32 + case wbAny | prCR<<32: + return wbCR, true, 32 + case wbAny | prLF<<32: + return wbLF, true, 32 // WB3a. - {wbNewline, prAny}: {wbAny, wbBreak, 31}, - {wbCR, prAny}: {wbAny, wbBreak, 31}, - {wbLF, prAny}: {wbAny, wbBreak, 31}, + case wbNewline | prAny<<32: + return wbAny, true, 31 + case wbCR | prAny<<32: + return wbAny, true, 31 + case wbLF | prAny<<32: + return wbAny, true, 31 // WB3. - {wbCR, prLF}: {wbLF, wbDontBreak, 30}, + case wbCR | prLF<<32: + return wbLF, false, 30 // WB3d. - {wbAny, prWSegSpace}: {wbWSegSpace, wbBreak, 9990}, - {wbWSegSpace, prWSegSpace}: {wbWSegSpace, wbDontBreak, 34}, + case wbAny | prWSegSpace<<32: + return wbWSegSpace, true, 9990 + case wbWSegSpace | prWSegSpace<<32: + return wbWSegSpace, false, 34 // WB5. - {wbAny, prALetter}: {wbALetter, wbBreak, 9990}, - {wbAny, prHebrewLetter}: {wbHebrewLetter, wbBreak, 9990}, - {wbALetter, prALetter}: {wbALetter, wbDontBreak, 50}, - {wbALetter, prHebrewLetter}: {wbHebrewLetter, wbDontBreak, 50}, - {wbHebrewLetter, prALetter}: {wbALetter, wbDontBreak, 50}, - {wbHebrewLetter, prHebrewLetter}: {wbHebrewLetter, wbDontBreak, 50}, + case wbAny | prALetter<<32: + return wbALetter, true, 9990 + case wbAny | prHebrewLetter<<32: + return wbHebrewLetter, true, 9990 + case wbALetter | prALetter<<32: + return wbALetter, false, 50 + case wbALetter | prHebrewLetter<<32: + return wbHebrewLetter, false, 50 + case wbHebrewLetter | prALetter<<32: + return wbALetter, false, 50 + case wbHebrewLetter | prHebrewLetter<<32: + return wbHebrewLetter, false, 50 // WB7. Transitions to wbWB7 handled by transitionWordBreakState(). - {wbWB7, prALetter}: {wbALetter, wbDontBreak, 70}, - {wbWB7, prHebrewLetter}: {wbHebrewLetter, wbDontBreak, 70}, + case wbWB7 | prALetter<<32: + return wbALetter, false, 70 + case wbWB7 | prHebrewLetter<<32: + return wbHebrewLetter, false, 70 // WB7a. - {wbHebrewLetter, prSingleQuote}: {wbAny, wbDontBreak, 71}, + case wbHebrewLetter | prSingleQuote<<32: + return wbAny, false, 71 // WB7c. Transitions to wbWB7c handled by transitionWordBreakState(). - {wbWB7c, prHebrewLetter}: {wbHebrewLetter, wbDontBreak, 73}, + case wbWB7c | prHebrewLetter<<32: + return wbHebrewLetter, false, 73 // WB8. - {wbAny, prNumeric}: {wbNumeric, wbBreak, 9990}, - {wbNumeric, prNumeric}: {wbNumeric, wbDontBreak, 80}, + case wbAny | prNumeric<<32: + return wbNumeric, true, 9990 + case wbNumeric | prNumeric<<32: + return wbNumeric, false, 80 // WB9. - {wbALetter, prNumeric}: {wbNumeric, wbDontBreak, 90}, - {wbHebrewLetter, prNumeric}: {wbNumeric, wbDontBreak, 90}, + case wbALetter | prNumeric<<32: + return wbNumeric, false, 90 + case wbHebrewLetter | prNumeric<<32: + return wbNumeric, false, 90 // WB10. - {wbNumeric, prALetter}: {wbALetter, wbDontBreak, 100}, - {wbNumeric, prHebrewLetter}: {wbHebrewLetter, wbDontBreak, 100}, + case wbNumeric | prALetter<<32: + return wbALetter, false, 100 + case wbNumeric | prHebrewLetter<<32: + return wbHebrewLetter, false, 100 // WB11. Transitions to wbWB11 handled by transitionWordBreakState(). - {wbWB11, prNumeric}: {wbNumeric, wbDontBreak, 110}, + case wbWB11 | prNumeric<<32: + return wbNumeric, false, 110 // WB13. - {wbAny, prKatakana}: {wbKatakana, wbBreak, 9990}, - {wbKatakana, prKatakana}: {wbKatakana, wbDontBreak, 130}, + case wbAny | prKatakana<<32: + return wbKatakana, true, 9990 + case wbKatakana | prKatakana<<32: + return wbKatakana, false, 130 // WB13a. - {wbAny, prExtendNumLet}: {wbExtendNumLet, wbBreak, 9990}, - {wbALetter, prExtendNumLet}: {wbExtendNumLet, wbDontBreak, 131}, - {wbHebrewLetter, prExtendNumLet}: {wbExtendNumLet, wbDontBreak, 131}, - {wbNumeric, prExtendNumLet}: {wbExtendNumLet, wbDontBreak, 131}, - {wbKatakana, prExtendNumLet}: {wbExtendNumLet, wbDontBreak, 131}, - {wbExtendNumLet, prExtendNumLet}: {wbExtendNumLet, wbDontBreak, 131}, + case wbAny | prExtendNumLet<<32: + return wbExtendNumLet, true, 9990 + case wbALetter | prExtendNumLet<<32: + return wbExtendNumLet, false, 131 + case wbHebrewLetter | prExtendNumLet<<32: + return wbExtendNumLet, false, 131 + case wbNumeric | prExtendNumLet<<32: + return wbExtendNumLet, false, 131 + case wbKatakana | prExtendNumLet<<32: + return wbExtendNumLet, false, 131 + case wbExtendNumLet | prExtendNumLet<<32: + return wbExtendNumLet, false, 131 // WB13b. - {wbExtendNumLet, prALetter}: {wbALetter, wbDontBreak, 132}, - {wbExtendNumLet, prHebrewLetter}: {wbHebrewLetter, wbDontBreak, 132}, - {wbExtendNumLet, prNumeric}: {wbNumeric, wbDontBreak, 132}, - {wbExtendNumLet, prKatakana}: {prKatakana, wbDontBreak, 132}, + case wbExtendNumLet | prALetter<<32: + return wbALetter, false, 132 + case wbExtendNumLet | prHebrewLetter<<32: + return wbHebrewLetter, false, 132 + case wbExtendNumLet | prNumeric<<32: + return wbNumeric, false, 132 + case wbExtendNumLet | prKatakana<<32: + return wbKatakana, false, 132 + + default: + return -1, false, -1 + } } // transitionWordBreakState determines the new state of the word break parser @@ -141,30 +180,27 @@ func transitionWordBreakState(state int, r rune, b []byte, str string) (newState // Find the applicable transition in the table. var rule int - transition, ok := wbTransitions[[2]int{state, nextProperty}] - if ok { - // We have a specific transition. We'll use it. - newState, wordBreak, rule = transition[0], transition[1] == wbBreak, transition[2] - } else { + newState, wordBreak, rule = wbTransitions(state, nextProperty) + if newState < 0 { // No specific transition found. Try the less specific ones. - transAnyProp, okAnyProp := wbTransitions[[2]int{state, prAny}] - transAnyState, okAnyState := wbTransitions[[2]int{wbAny, nextProperty}] - if okAnyProp && okAnyState { + anyPropState, anyPropWordBreak, anyPropRule := wbTransitions(state, prAny) + anyStateState, anyStateWordBreak, anyStateRule := wbTransitions(wbAny, nextProperty) + if anyPropState >= 0 && anyStateState >= 0 { // Both apply. We'll use a mix (see comments for grTransitions). - newState, wordBreak, rule = transAnyState[0], transAnyState[1] == wbBreak, transAnyState[2] - if transAnyProp[2] < transAnyState[2] { - wordBreak, rule = transAnyProp[1] == wbBreak, transAnyProp[2] + newState, wordBreak, rule = anyStateState, anyStateWordBreak, anyStateRule + if anyPropRule < anyStateRule { + wordBreak, rule = anyPropWordBreak, anyPropRule } - } else if okAnyProp { + } else if anyPropState >= 0 { // We only have a specific state. - newState, wordBreak, rule = transAnyProp[0], transAnyProp[1] == wbBreak, transAnyProp[2] + newState, wordBreak, rule = anyPropState, anyPropWordBreak, anyPropRule // This branch will probably never be reached because okAnyState will // always be true given the current transition map. But we keep it here // for future modifications to the transition map where this may not be // true anymore. - } else if okAnyState { + } else if anyStateState >= 0 { // We only have a specific property. - newState, wordBreak, rule = transAnyState[0], transAnyState[1] == wbBreak, transAnyState[2] + newState, wordBreak, rule = anyStateState, anyStateWordBreak, anyStateRule } else { // No known transition. WB999: Any รท Any. newState, wordBreak, rule = wbAny, true, 9990 |