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Added new proc

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In reference to #2353
This commit is contained in:
apense
2015-07-03 21:33:12 -04:00
parent b39ce2fbfc
commit 64b3395ade
1 changed files with 18 additions and 10 deletions
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28
lib/pure/unicode.nim
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@@ -1163,7 +1163,7 @@ proc binarySearch(c: RuneImpl, tab: openArray[RuneImpl], len, stride: int): int
return -1
proc toLower*(c: Rune): Rune {.rtl, extern: "nuc$1", procvar.} =
## Converts `c` into lower case. This works for any Unicode character.
## Convert `c` into lower case. This works for any Unicode character.
## If possible, prefer `toLower` over `toUpper`.
var c = RuneImpl(c)
var p = binarySearch(c, tolowerRanges, len(tolowerRanges) div 3, 3)
@@ -1175,7 +1175,7 @@ proc toLower*(c: Rune): Rune {.rtl, extern: "nuc$1", procvar.} =
return Rune(c)
proc toUpper*(c: Rune): Rune {.rtl, extern: "nuc$1", procvar.} =
## Converts `c` into upper case. This works for any Unicode character.
## Convert `c` into upper case. This works for any Unicode character.
## If possible, prefer `toLower` over `toUpper`.
var c = RuneImpl(c)
var p = binarySearch(c, toupperRanges, len(toupperRanges) div 3, 3)
@@ -1194,7 +1194,7 @@ proc toTitle*(c: Rune): Rune {.rtl, extern: "nuc$1", procvar.} =
return Rune(c)
proc isLower*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
## returns true iff `c` is a lower case Unicode character
## Return true iff `c` is a lower case Unicode character.
## If possible, prefer `isLower` over `isUpper`.
var c = RuneImpl(c)
# Note: toUpperRanges is correct here!
@@ -1206,7 +1206,7 @@ proc isLower*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
return true
proc isUpper*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
## returns true iff `c` is a upper case Unicode character
## Return true iff `c` is a upper case Unicode character.
## If possible, prefer `isLower` over `isUpper`.
var c = RuneImpl(c)
# Note: toLowerRanges is correct here!
@@ -1218,7 +1218,7 @@ proc isUpper*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
return true
proc isAlpha*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
## returns true iff `c` is an *alpha* Unicode character (i.e. a letter)
## Return true iff `c` is an *alpha* Unicode character (i.e., a letter)
if isUpper(c) or isLower(c):
return true
var c = RuneImpl(c)
@@ -1230,17 +1230,18 @@ proc isAlpha*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
return true
proc isTitle*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
## Return true iff `c` is a Unicode titlecase character
return isUpper(c) and isLower(c)
proc isWhiteSpace*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
## returns true iff `c` is a Unicode whitespace character
## Return true iff `c` is a Unicode whitespace character
var c = RuneImpl(c)
var p = binarySearch(c, spaceRanges, len(spaceRanges) div 2, 2)
if p >= 0 and c >= spaceRanges[p] and c <= spaceRanges[p+1]:
return true
proc isCombining*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
## returns true iff `c` is a Unicode combining character
## Return true iff `c` is a Unicode combining character
var c = RuneImpl(c)
# Optimized to return false immediately for ASCII
@@ -1251,7 +1252,7 @@ proc isCombining*(c: Rune): bool {.rtl, extern: "nuc$1", procvar.} =
(c >= 0xfe20 and c <= 0xfe2f))
iterator runes*(s: string): Rune =
## iterates over any unicode character of the string `s`.
## Iterate over any unicode character of the string `s`
var
i = 0
result: Rune
@@ -1259,8 +1260,14 @@ iterator runes*(s: string): Rune =
fastRuneAt(s, i, result, true)
yield result
proc runesIn*(s: string): seq[Rune] =
## Obtain a sequence containing the Runes in `s`
result = newSeq[Rune]()
for r in s.runes:
result.add(r)
proc cmpRunesIgnoreCase*(a, b: string): int {.rtl, extern: "nuc$1", procvar.} =
## compares two UTF8 strings and ignores the case. Returns:
## Compare two UTF8 strings and ignore the case. Returns:
##
## | 0 iff a == b
## | < 0 iff a < b
@@ -1277,7 +1284,7 @@ proc cmpRunesIgnoreCase*(a, b: string): int {.rtl, extern: "nuc$1", procvar.} =
result = a.len - b.len
proc reversed*(s: string): string =
## returns the reverse of `s`, interpreting it as unicode characters. Unicode
## Return the reverse of `s`, interpreting it as unicode characters. Unicode
## combining characters are correctly interpreted as well:
##
## .. code-block:: nim
@@ -1322,3 +1329,4 @@ when isMainModule:
assert reversed("先秦兩漢") == "漢兩秦先"
assert reversed("as⃝df̅") == "f̅ds⃝a"
assert reversed("a⃞b⃞c⃞") == "c⃞b⃞a⃞"
assert len(runesIn("as⃝df̅")) == runeLen("as⃝df̅")