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improve error message for invalid line

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like a = 12 = true, newline is expected after 12
This commit is contained in:
ToruNiina
2018-12-10 21:43:02 +09:00
parent ff83a6a477
commit 4e57c5f5df
1 changed files with 14 additions and 2 deletions
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16
toml/parser.hpp
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@@ -1209,8 +1209,9 @@ result<table, std::string> parse_ml_table(location<Container>& loc)
return err(std::string("toml::parse_ml_table: input is empty"));
}
// XXX at lest one newline is needed
using skip_line = repeat<
sequence<maybe<lex_ws>, maybe<lex_comment>, lex_newline>, unlimited>;
sequence<maybe<lex_ws>, maybe<lex_comment>, lex_newline>, at_least<1>>;
skip_line::invoke(loc);
table tab;
@@ -1244,7 +1245,18 @@ result<table, std::string> parse_ml_table(location<Container>& loc)
return err(kv.unwrap_err());
}
skip_line::invoke(loc);
const auto newline = skip_line::invoke(loc);
if(!newline && loc.iter() != loc.end())
{
const auto before = loc.iter();
lex_ws::invoke(loc); // skip whitespace
const auto msg = format_underline("[error] toml::parse_table: "
"invalid line format", loc, concat_to_string(
"expected newline, but got '", show_char(*loc.iter()), "'."));
loc.iter() = before;
return err(msg);
}
// comment lines are skipped by the above function call.
// However, if the file ends with comment without newline,
// it might cause parsing error because skip_line matches