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| author | Andreas Rumpf <rumpf_a@web.de> | 2021-09-02 12:10:14 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-09-02 12:10:14 +0200 |
| commit | e0ef859130f429df1891e31a85955daa753346b4 (patch) | |
| tree | 49c680c4e93a321a319e38168dd14483c2a9b71e /changelog.md | |
| parent | 72fa5833adac590e3c78e2b774cd33f28827594b (diff) | |
| download | Nim-e0ef859130f429df1891e31a85955daa753346b4.tar.gz | |
strict effects (#18777)
* fixes #17369 * megatest is green for --cpu:arm64 * docgen output includes more tags/raises * implemented 'effectsOf' * algorithm.nim: uses new effectsOf annotation * closes #18376 * closes #17475 * closes #13905 * allow effectsOf: [a, b] * added a test case * parameters that are not ours cannot be declared as .effectsOf * documentation * manual: added the 'sort' example * bootstrap with the new better options
Diffstat (limited to 'changelog.md')
| -rw-r--r-- | changelog.md | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/changelog.md b/changelog.md index 65ae61833..10824cfc6 100644 --- a/changelog.md +++ b/changelog.md @@ -427,6 +427,23 @@ - On embedded devices `malloc` can now be used instead of `mmap` via `-d:nimAllocPagesViaMalloc`. This is only supported for `--gc:orc` or `--gc:arc`. +- The effect system was refined and there is a new `.effectsOf` annotation that does + explicitly what was previously done implicitly. See the manual for details. + To write code that is portable with older Nim versions, use this idiom: + +```nim + +when defined(nimHasEffectsOf): + {.experimental: "strictEffects".} +else: + {.pragma: effectsOf.} + +proc mysort(s: seq; cmp: proc(a, b: T): int) {.effectsOf: cmp.} + +``` + + To enable the new effect system, use --experimental:strictEffects. + ## Compiler changes |