Grammar simplan;

Lexer

letter = 'a'..'z'|'a'..'Z';
digit = '0'..'9';
name = letter (letter|digit)*;
nb = digit* '.' digit+ | digit+;

eol = #10 | #13 | #10 #13;
comment = '#' (Any-eol)* eol?;

blank = #9 | #10 | #13 | ' ' | comment;

Parser

Ignored blank;

file = problem | plan ;

problem = locations roads robots parcels goal;
locations = 'Locations' '{' [list:]location* '}';
location = name [x:]nb [y:]nb ';';
roads = 'Roads' '{' [list:]road* '}';
road = [orig:]name [dest:]name ';' ;
robots = 'Robots' '{' [list:]robot* '}';
robot = name [emplacement:]name ';';
parcels = 'Parcels' '{' [list:]parcel* '}';
parcel = name [emplacement:]name ';';
goal = 'Goals' '{' [list:]parcel* '}';

plan = 'SimplePlan' '{' [actions:]action* '}';
action =
	{load:} 'Load' '(' [robot:]name ',' [parcel:]name ')' ';' |
	{unload:} 'Unload' '(' [robot:]name ',' [parcel:]name ')' ';' |
	{drive:} 'Drive' '(' [robot:]name ',' [orig:]name ',' [dest:]name ')' ';' ;