- LaTeX.ebnf slightly extended; need a test-suite first

examples/LaTeX/LaTeX.ebnf

 # latex Grammar
 
-@ whitespace = /[ \t]*\n?(?!\s*\n)[ \t]*/
+@ whitespace = /[ \t]*\n?(?!\s*\n)[ \t]*/  # whitespace, including at most one linefeed
 @ comment    = /%.*(?:\n|$)/
 
-genericenv = beginenv sequence endenv
+latexdoc   = preamble document
+preamble   = { command }+
+
+genericenv = beginenv sequence §endenv
 beginenv   = "\begin" §( "{" name "}" )
 endenv     = "\end" §( "{" ::name "}" )
 
-name       = ~/\w+/
+name       = /\w+/~
 
-genericcmd = command [ config ] block
-command    = /\\\w+/
+comand     = cmdname [ config ] block
+cmdname    = /\\\w+/
 config     = "[" cfgtext §"]"
 
 sequence   = { partext | parblock }
@@ -18,16 +21,16 @@ sequence   = { partext | parblock }
 parblock   = "{" { partext | parblock } §"}"
 block      = "{" { text | block } §"}"
 
-partext    = text | par
+partext    = text | PARSEP
 text       = cfgtext | brackets
-cfgtext    = chunk | wspc | escaped
+cfgtext    = chunk | escaped | WSPC
 
 escaped    = /\\[%$&]/
 brackets   = /[\[\]]/                   # left and right square brackets: [ ]
 chunk      = /[^\\%$&\{\}\[\]\s\n]+/    # some piece of text excluding whitespace,
                                         # linefeed and special characters
-wspc       = /[ \t]*\n?(?!\s*\n)[ \t]*/ # whitespace, including at most one linefeed
-lf         = /[ \t]*\n(?!\s*\n)/        # a linefeed, but not an empty line (i.e. par)
-par        = /\s*\n\s*\n/               # at least one empty line, i.e.
+WSPC       = /[ \t]*\n?(?!\s*\n)[ \t]*/ # whitespace, including at most one linefeed
+LF         = /[ \t]*\n(?!\s*\n)/        # a linefeed, but not an empty line (i.e. par)
+PARSEP     = /\s*\n\s*\n/               # at least one empty line, i.e.
                                         # [whitespace] linefeed [whitespace] linefeed