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Add support for EBNF

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Extended Backus–Naur form ([EBNF][]) is a metalanguage used to specify
language grammars.

[EBNF]: https://en.wikipedia.org/wiki/Extended_Backus–Naur_form
This commit is contained in:
René Schwaiger
2016-10-31 14:51:51 +01:00
parent 417239004a
commit 33899b9d6b
9 changed files with 184 additions and 0 deletions
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samples/EBNF/types.ebnf Normal file
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(*
Source: https://github.com/io7m/jsom0
License: ISC
*)
digit_without_zero =
"1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
digit =
"0" | digit_without_zero ;
positive =
digit_without_zero , { digit } ;
natural =
"0" | positive ;
real =
[ "-" ] , digit , [ "." , { digit } ] ;