Sha256: 84c97b08e4c79a8a774e1fd9895d0a6a63846c8e4d2cb80403aed3ea71c55295
Contents?: true
Size: 1.08 KB
Versions: 11
Compression:
Stored size: 1.08 KB
Contents
module Unitwise
module Expression
# Transformer is responsible for turning a Unitwise::Expression::Parser
# hash result into a collection of Unitwise::Terms.
class Transformer < Parslet::Transform
rule(:integer => simple(:i)) { i.to_i }
rule(:fixnum => simple(:f)) { f.to_f }
rule(:prefix_code => simple(:c)) { |x| Prefix.find(x[:c], x[:mode]) }
rule(:atom_code => simple(:c)) { |x| Atom.find(x[:c], x[:mode]) }
rule(:term => subtree(:h)) { Term.new(h) }
rule(:operator => simple(:o), :right => simple(:r)) do
o == '/' ? r ** -1 : r
end
rule(:left => simple(:l), :operator => simple(:o),
:right => simple(:r)) do
o == '/' ? l / r : l * r
end
rule(:left => simple(:l)) { l }
rule(:group => { :factor => simple(:f),
:nested => simple(:n), :exponent => simple(:e) }) do
(n ** e) * f
end
rule(:group => { :nested => simple(:n) , :exponent => simple(:e) }) do
n ** e
end
rule(:group => { :nested => simple(:n) }) { n }
end
end
end
Version data entries
11 entries across 11 versions & 2 rubygems