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improve error message for empty value

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ToruNiina
2018-12-13 20:37:40 +09:00
parent e86777d19c
commit 57de57a1de
1 changed files with 15 additions and 1 deletions
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16
toml/parser.hpp
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@@ -954,11 +954,25 @@ parse_key_value_pair(location<Container>& loc)
return err(std::move(msg));
}
const auto after_kvsp = loc.iter(); // err msg
auto val = parse_value(loc);
if(!val)
{
std::string msg;
loc.iter() = after_kvsp;
if(sequence<maybe<lex_ws>, maybe<lex_comment>, lex_newline>::invoke(loc))
{
loc.iter() = after_kvsp;
msg = format_underline("[error] toml::parse_key_value_pair: "
"missing value after key-value separator '='", loc,
"expected value, but got nothing");
}
else
{
msg = val.unwrap_err();
}
loc.iter() = first;
return err(val.unwrap_err());
return err(msg);
}
return ok(std::make_pair(std::move(key.unwrap()), std::move(val.unwrap())));
}