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Stream-writer for a rope (#6603)

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Dmitry Atamanov 2017-11-06 11:50:42 +03:00 • committed by Andreas Rumpf
commit 87a46765ee
1 changed files with 7 additions and 3 deletions
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10
lib/pure/ropes.nim
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@ -17,6 +17,7 @@
## runtime efficiency.
include "system/inclrtl"
import streams
{.deadCodeElim: on.}
@ -130,7 +131,7 @@ proc insertInCache(s: string, tree: Rope): Rope =
result.left = t
t.right = nil
proc rope*(s: string): Rope {.rtl, extern: "nro$1Str".} =
proc rope*(s: string = nil): Rope {.rtl, extern: "nro$1Str".} =
## Converts a string to a rope.
if s.len == 0:
result = nil
@ -242,10 +243,13 @@ proc write*(f: File, r: Rope) {.rtl, extern: "nro$1".} =
## writes a rope to a file.
for s in leaves(r): write(f, s)
proc write*(s: Stream, r: Rope) {.rtl, extern: "nro$1".} =
## writes a rope to a stream.
for rs in leaves(r): write(s, rs)
proc `$`*(r: Rope): string {.rtl, extern: "nroToString".}=
## converts a rope back to a string.
result = newString(r.len)
setLen(result, 0)
result = newStringOfCap(r.len)
for s in leaves(r): add(result, s)
when false: