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fixing precedence order, so that you can nest range comprehensions

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This commit is contained in:
Jeremy Ashkenas
2010-01-01 11:19:57 -05:00
parent 305f883eab
commit e30a267c9d
3 changed files with 18 additions and 5 deletions
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9
lib/coffee_script/nodes.rb
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@@ -360,10 +360,11 @@ module CoffeeScript
write("#{idt}#{@from_var} = #{from_val};\n#{idt}#{@to_var} = #{to_val};\n#{idt}")
end
def compile(o, fv)
vars = "#{fv}=#{@from_var}"
compare = "(#{@from_var} <= #{@to_var} ? #{fv} #{less_operator} #{@to_var} : #{fv} #{greater_operator} #{@to_var})"
incr = "(#{@from_var} <= #{@to_var} ? #{fv} += 1 : #{fv} -= 1)"
def compile(o, idx=nil)
raise SyntaxError, "unexpected range literal" unless idx
vars = "#{idx}=#{@from_var}"
compare = "(#{@from_var} <= #{@to_var} ? #{idx} #{less_operator} #{@to_var} : #{idx} #{greater_operator} #{@to_var})"
incr = "(#{@from_var} <= #{@to_var} ? #{idx} += 1 : #{idx} -= 1)"
write("#{vars}; #{compare}; #{incr}")
end