Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- ebnf:examples [2009/01/20 11:58] – Vincent Tscherter
+++ ebnf:examples [2011/05/30 12:29] (aktuell) – Externe Bearbeitung 127.0.0.1
@@ Zeile 1: / Zeile 1: @@
+====== EBNF Examples ======
+~~NOCACHE~~
+===== Arithmetic Expressions =====
+<code><ebnf> "Arithmetic Expressions" {
+expression = term  { ("+" | "-") term} .
+term       = factor  { ("*"|"/") factor} .
+factor     = constant | variable | "("  expression  ")" .
+variable   = "x" | "y" | "z" .
+constant   = digit {digit} .
+digit      = "0" | "1" | "..." | "9" .
+} </ebnf></code>
+<ebnf> "Arithmetic Expressions" {
+expression = term  { ("+" | "-") term} .
+term       = factor  { ("*"|"/") factor} .
+factor     = constant | variable | "("  expression  ")" .
+variable   = "x" | "y" | "z" .
+constant   = digit {digit} .
+digit      = "0" | "1" | "..." | "9" .
+}
+</ebnf>
+See: http://en.wikipedia.org/wiki/Syntax_diagram
+===== Designator =====
+<code><ebnf> "Designator" {
+  Designator = (ident | "this" | "super") {"." ident | "[" Expr "]"}.
+} </ebnf></code>
+<ebnf> "Designator" {
+  Designator = (ident | "this" | "super") {"." ident | "[" Expr "]"}.
+} </ebnf>
+See: http://dotnet.jku.at/applications/Visualizer/#Simple
+===== Backus-Naur Form (BNF) =====
+<code>
+<ebnf> "Backus-Naur Form" {
+  syntax         = rule [ syntax ] .
+  rule           = opt-ws  identifier opt-ws "::=" opt-ws expression opt-ws EOL .
+  expression     = list [ "|" expression ] .
+  line-end       = opt-ws EOL | line-end line-end .
+  list           = term [ WHITESPACE list ] .
+  term           = literal | identifier .
+  identifier     = "<" character {character} ">" .
+  literal        = "'" {character} "'" | '"'  {character} '"' .
+  opt-ws         = { WHITESPACE } .
+  character      = lowercase-char | uppercase-char | digit | special-char .
+  lowercase-char = "a" | "b" | "..." | "z" .
+  uppercase-char = "A" | "B" | "..." | "Z" .
+  digit          = "0" | "1" | "..." | "2" .
+  special-char   = "-" | "_" .
+} </ebnf>
+</code>
+<ebnf> "Backus-Naur Form" {
+  syntax         = rule [ syntax ] .
+  rule           = opt-ws  identifier opt-ws "::=" opt-ws expression opt-ws EOL .
+  expression     = list [ "|" expression ] .
+  line-end       = opt-ws EOL | line-end line-end .
+  list           = term [ WHITESPACE list ] .
+  term           = literal | identifier .
+  identifier     = "<" character {character} ">" .
+  literal        = "'" {character} "'" | '"'  {character} '"' .
+  opt-ws         = { WHITESPACE } .
+  character      = lowercase-char | uppercase-char | digit | special-char .
+  lowercase-char = "a" | "b" | "..." | "z" .
+  uppercase-char = "A" | "B" | "..." | "Z" .
+  digit          = "0" | "1" | "..." | "2" .
+  special-char   = "-" | "_" .
+} </ebnf>
+Adapted from: http://en.wikipedia.org/wiki/Wirth_syntax_notation