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Merge pull request #8421 from fricklerhandwerk/doc-replaceStrings

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update documentation according to release notes
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Eelco Dolstra 2023-05-31 12:10:32 +02:00 committed by GitHub
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2
doc/manual/src/release-notes/rl-next.md
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@ -4,4 +4,4 @@
The number of parallel downloads (also known as substitutions) has been separated from the [`--max-jobs` setting](../command-ref/conf-file.md#conf-max-jobs). The number of parallel downloads (also known as substitutions) has been separated from the [`--max-jobs` setting](../command-ref/conf-file.md#conf-max-jobs).
The new setting is called [`max-substitution-jobs`](../command-ref/conf-file.md#conf-max-substitution-jobs). The new setting is called [`max-substitution-jobs`](../command-ref/conf-file.md#conf-max-substitution-jobs).
The number of parallel downloads is now set to 16 by default (previously, the default was 1 due to the coupling to build jobs). The number of parallel downloads is now set to 16 by default (previously, the default was 1 due to the coupling to build jobs).
- The function `builtins.replaceStrings` is now lazy in the value of its second argument `to`, that is a replacee in `to` is only evaluated when its corresponding pattern in `from` is matched in the string `s`. - The function [`builtins.replaceStrings`](@docroot@/language/builtins.md#builtins-replaceStrings) is now lazy in the value of its second argument `to`. That is, `to` is only evaluated when its corresponding pattern in `from` is matched in the string `s`.

6
src/libexpr/primops.cc
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@ -3957,7 +3957,11 @@ static RegisterPrimOp primop_replaceStrings({
.args = {"from", "to", "s"}, .args = {"from", "to", "s"},
.doc = R"( .doc = R"(
Given string *s*, replace every occurrence of the strings in *from* Given string *s*, replace every occurrence of the strings in *from*
with the corresponding string in *to*. For example, with the corresponding string in *to*.
The argument *to* is lazy, that is, it is only evaluated when its corresponding pattern in *from* is matched in the string *s*
Example:
```nix ```nix
builtins.replaceStrings ["oo" "a"] ["a" "i"] "foobar" builtins.replaceStrings ["oo" "a"] ["a" "i"] "foobar"