Regex BNF Grammar
You can see one for Perl regexp (displayed a little more in detail here, as posted by edg)
bnf
Converting EBNF to BNF
See this page.🕗 It contains instructions for each production that needs to be converted: From EBNF to BNF For building parsers (especially bottom-up) a BNF grammar is often better, than EBNF. But it’s easy to convert an EBNF Grammar to BNF: Convert every repetition { E } to a fresh non-terminal X and add X … Read more
Z80 ASM BNF structure… am I on the right track?
Old-school assemblers were typically hand-coded in assembler and used adhoc parsing techniques to process assembly source lines to produce actual assembler code. When assembler syntax is simple (e.g. always OPCODE REG, OPERAND) this worked well enough. Modern machines have messy, nasty instruction sets with lots of instruction variations and operands, which may be expressed with … Read more
How to convert BNF to EBNF
EBNF or Extended Backus-Naur Form is ISO 14977:1996, and is available in PDF from ISO for free*. It is not widely used by the computer language standards. There’s also a paper that describes it, and that paper contains this table summarizing EBNF notation. Table 1: Extended BNF Extended BNF Operator Meaning ————————————————————- unquoted words Non-terminal … Read more
Tool for generating railroad diagram used on json.org [closed]
There is an Online Railroad Diagram Generator. It creates SVG syntax diagrams, also known as railroad diagrams, from context-free grammars specified in EBNF. You can copy the SVG code or take screen shots. You have to type in the grammar and it’ll make the diagram. For example, to create the first railroad diagram you show, … Read more