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Contents
module WLang
class Compiler
class Autospacing < Filter
def on_strconcat(*exps)
optimized = []
exps.each_with_index do |exp,i|
optimized[i] = call(exp)
if exp.first == :wlang and multiline?(exp) and i != 0
optimized[i-1] = RightStrip.new.call(optimized[i-1])
end
end
[:strconcat] + optimized
end
def on_wlang(symbols, *fns)
fns.inject [:wlang, symbols] do |rw,fn|
if multiline?(fn)
fn = Unindent.new.call(fn)
fn = RightStrip.new.call(fn)
end
rw << call(fn)
end
end
private
def multiline?(who)
case who.first
when :static
who.last =~ /\n/
when :wlang, :modulo
who[2..-1].any?{|s| s && multiline?(s)}
else
who[1..-1].any?{|s| s && multiline?(s)}
end
end
class RightStrip < Filter
def on_strconcat(*exps)
exps[-1] = call(exps[-1])
[:strconcat] + exps
end
def on_static(text)
[:static, text.gsub(/\s+\Z/m, '')]
end
end # class RightStrip
class Unindent < Filter
def on_static(text)
[:static, text.gsub(/^ /m, '')]
end
end # class Unindent
end # class Autospacing
end # class Compiler
end # module WLang
Version data entries
14 entries across 14 versions & 1 rubygems