Grammar railroad diagram

Using some online tools like https://www.bottlecaps.de/rr/ui and https://www.bottlecaps.de/convert/ and manually adding the tokens from the lexer we can have a nice navigable railroad diagram.

Copy and paste the EBNF shown bellow on https://www.bottlecaps.de/rr/ui on the tab Edit Grammar the click on the tab View Diagram to see/download a navigable railroad diagram.

/* converted on Fri Mar 31, 2023, 18:59 (UTC+02) by bison-to-w3c v0.64 which is Copyright (c) 2011-2023 by Gunther Rademacher <grd@gmx.net> */
//From: https://github.com/torsten-rupp/fsmc/blob/main/parser.y

start    ::= ( KEYWORD_FSM IDENTIFIER error? ( MULTIPLY? IDENTIFIER '{' statementList '}' )* KEYWORD_END )*
block    ::= '{' statementList '}'
statementOrBlock
         ::= statement
           | block
statement
         ::= variable
           | if
           | for
           | while
           | do
           | assign
           | ( newState | expression ) ';'
           | block
statementList
         ::= statement? statement*
variable ::= type IDENTIFIER ( ASSIGN expression )? ';'
if       ::= KEYWORD_IF '(' expression ')' statementOrBlock ( KEYWORD_ELSE statementOrBlock )?
for      ::= KEYWORD_FOR '(' expression ';' expression ';' expression ')' statementOrBlock
do       ::= KEYWORD_DO statementOrBlock KEYWORD_WHILE '(' expression ')' ';'
while    ::= KEYWORD_WHILE '(' expression ')' statementOrBlock
assign   ::= expression ASSIGN expression ';'
newState ::= DEREFERENCE IDENTIFIER ( '{' ( STRING ( ',' IDENTIFIER ( ',' number )? )? )? '}' )?
type     ::= IDENTIFIER
number   ::= INTEGER
           | FLOAT
expression
         ::= '(' expression ')' expression?
           | ( MINUS | NOT ) expression
           | expression ( ( ASSIGN | PLUS | MINUS | MULTIPLY | DIVIDE | EQUALS | NOT_EQUALS | LOWER | GREATER | LOWER_EQUALS | GREATER_EQUALS | AND | OR | XOR ) expression | INCREMENT | DECREMENT )
           | IDENTIFIER ( '(' expression? ( ',' expression )* ')' )?
           | STRING
           | number

// Tokens

KEYWORD_IF ::= "if"
KEYWORD_ELSE ::= "else"
KEYWORD_FOR ::= "for"
KEYWORD_WHILE ::= "while"
KEYWORD_DO ::= "do"

KEYWORD_FSM ::= "#fsm"
KEYWORD_END ::= "#end"

ASSIGN ::= "="
PLUS ::= "+"
MINUS ::= "-"
MULTIPLY ::= "*"
DIVIDE ::= "/"
INCREMENT ::= "++"
DECREMENT ::= "--"
EQUALS ::= "=="
NOT_EQUALS ::= "!="
LOWER ::= "<"
LOWER_EQUALS ::= "<="
GREATER ::= ">"
GREATER_EQUALS ::= ">="
DEREFERENCE ::= "->"
NOT ::= "!"
AND ::= "&&"
OR ::= "||"
XOR ::= "^"

torsten-rupp / fsmc

Grammar railroad diagram #1