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Contents
module CEML
grammar Lexer
rule text
(!eol .)+
end
rule nl
(ws? comment? eol)+
end
rule ws
[ \t\f]+
end
rule comment
'//' text
end
rule eol
("\r" "\n"?) / "\n"
end
rule number
([1-9]+ [0-9]* / '0') {
def value
text_value.to_i
end
}
end
rule and
(ws? ',')? ws 'and' ws / ws? ',' ws?
end
rule reserved_word
'and' / 'within' / 'over'
end
rule id
!(reserved_word ws) [a-zA-Z_]+
end
rule duration
number ws? time_unit:('seconds' / 'second' / 's' / 'minutes' / 'minute' / 'min' / 'hours' / 'hour' / 'hr' / 'h')
{
def seconds
number.text_value.to_f * case time_unit.text_value
when /^h/; 60*60; when /^mi/; 60; else 1; end
end
}
end
rule distance
number ws? distance_unit:('miles' / 'mile' / 'mi' / 'km' / 'kilometers' / 'k' / 'meters' / 'm' / 'ft' / 'feet' / 'f' / 'blocks' / 'block')
{
def meters
number.text_value.to_f * case distance_unit.text_value
when /^mi/; 1600; when /^k/; 1000; when /^m/; 1;
when /^f/; 0.35; when /^b/; 200; else 1; end
end
}
end
rule range
(
min:number '-' max:number / floor:number '+'? /
'an' / 'a' / 'one' / 'the' / 'some' / 'several' / 'many'
) {
def value
case text_value
when 'an', 'a', 'one', 'the' then (1..1)
when 'some' then (1..10000)
when 'several' then (3..10000)
when 'many' then (5..10000)
when /^\d+\+$/ then (floor.value..10000)
when /^\d+\-\d+$/ then (min.value..max.value)
when /^\d+$/ then (floor.value..floor.value)
else raise 'hell'
end
end
}
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems