diff options
Diffstat (limited to 'lib/system/strs_v2.nim')
| -rw-r--r-- | lib/system/strs_v2.nim | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/system/strs_v2.nim b/lib/system/strs_v2.nim index fe117997b..b20457d51 100644 --- a/lib/system/strs_v2.nim +++ b/lib/system/strs_v2.nim @@ -168,3 +168,10 @@ proc nimPrepareStrMutationImpl(s: var NimStringV2) = proc nimPrepareStrMutationV2(s: var NimStringV2) {.compilerRtl, inline.} = if s.p != nil and (s.p.cap and strlitFlag) == strlitFlag: nimPrepareStrMutationImpl(s) + +proc prepareStrMutation*(s: var string) {.inline.} = + # string literals are "copy on write", so you need to call + # `prepareStrMutation` before modifying the strings. + {.cast(noSideEffect).}: + let s = unsafeAddr s + nimPrepareStrMutationV2(cast[ptr NimStringV2](s)[]) |