janware/jw-python
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Continue implementation of grammar.py

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Signed-off-by: Jan Lindemann <jan@janware.com>
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Jan Lindemann 2017-10-25 13:45:44 +02:00
commit 40e6add5ad
6 changed files with 366 additions and 44 deletions
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test/grammar/grammartest-input.ebnf Normal file
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(* a simple program syntax in EBNF − Wikipedia *)
program = 'PROGRAM', white space, identifier, white space,
'BEGIN', white space,
{ assignment, ";", white space },
'END.' ;
identifier = alphabetic character, { alphabetic character | digit } ;
number = [ "-" ], digit, { digit } ;
string = '"' , { all characters - '"' }, '"' ;
assignment = identifier , ":=" , ( number | identifier | string ) ;
alphabetic character = "A" | "B" | "C" | "D" | "E" | "F" | "G"
| "H" | "I" | "J" | "K" | "L" | "M" | "N"
| "O" | "P" | "Q" | "R" | "S" | "T" | "U"
| "V" | "W" | "X" | "Y" | "Z" ;
digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
white space = ? white space characters ? ;
all characters = ? all visible characters ? ;