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auto merge of #10510 : chris-morgan/rust/fix-num_lit-grammar-in-the-reference-manaul, r=cmr

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- Cause `0` to be considered a valid integer literal (it is).
- Add octal literals (missed from #10243).

I have *not* modified doc/po/rust.md.pot or doc/po/ja/rust.md.po at all;
they already seem to be out of date so it's easier to ignore them for
myself. I can update them if desired, of course.
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bors 2013-11-17 04:26:37 -08:00
commit 6c8e33753c
1 changed files with 3 additions and 1 deletions
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@ -254,6 +254,7 @@ common_escape : '\x5c'
hex_digit : 'a' | 'b' | 'c' | 'd' | 'e' | 'f'
| 'A' | 'B' | 'C' | 'D' | 'E' | 'F'
| dec_digit ;
oct_digit : '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' ;
dec_digit : '0' | nonzero_dec ;
nonzero_dec: '1' | '2' | '3' | '4'
| '5' | '6' | '7' | '8' | '9' ;
@ -318,8 +319,9 @@ r##"foo #"# bar"##; // foo #"# bar
~~~~ {.ebnf .gram}
num_lit : nonzero_dec [ dec_digit | '_' ] * num_suffix ?
| '0' [ [ dec_digit | '_' ] + num_suffix ?
| '0' [ [ dec_digit | '_' ] * num_suffix ?
| 'b' [ '1' | '0' | '_' ] + int_suffix ?
| 'o' [ oct_digit | '_' ] + int_suffix ?
| 'x' [ hex_digit | '_' ] + int_suffix ? ] ;
num_suffix : int_suffix | float_suffix ;