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string2Int(): Return std::optional

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This commit is contained in:
Eelco Dolstra 2021-01-08 12:22:21 +01:00
parent 29a445840a
commit 6548b89cc4
17 changed files with 82 additions and 69 deletions
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6
src/libmain/shared.cc
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@ -219,10 +219,10 @@ LegacyArgs::LegacyArgs(const std::string & programName,
.description = description,
.labels = {"n"},
.handler = {[=](std::string s) {
unsigned int n;
if (!string2Int(s, n))
if (auto n = string2Int<unsigned int>(s))
settings.set(dest, std::to_string(*n));
else
throw UsageError("'%s' is not an integer", s);
settings.set(dest, std::to_string(n));
}}
});
};