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split lexer for escape sequence for unicode

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ToruNiina 2018-12-12 18:59:20 +09:00
parent 5d29509d98
commit c33ad31981
1 changed files with 6 additions and 4 deletions
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10
toml/lexer.hpp
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@ -117,14 +117,16 @@ using lex_basic_unescaped = exclude<either<in_range<0x00, 0x1F>,
character<0x22>, character<0x5C>,
character<0x7F>>>;
using lex_escape = character<'\\'>;
using lex_escape_unicode_short = sequence<character<'u'>,
repeat<lex_hex_dig, exactly<4>>>;
using lex_escape_unicode_long = sequence<character<'U'>,
repeat<lex_hex_dig, exactly<8>>>;
using lex_escape_seq_char = either<character<'"'>, character<'\\'>,
character<'/'>, character<'b'>,
character<'f'>, character<'n'>,
character<'r'>, character<'t'>,
sequence<character<'u'>,
repeat<lex_hex_dig, exactly<4>>>,
sequence<character<'U'>,
repeat<lex_hex_dig, exactly<8>>>
lex_escape_unicode_short,
lex_escape_unicode_long
>;
using lex_escaped = sequence<lex_escape, lex_escape_seq_char>;
using lex_basic_char = either<lex_basic_unescaped, lex_escaped>;