2 files changed, 20 insertions, 31 deletions

diff --git a/library.rb b/library.rb
index 0ba7cbc..1963b6e 100644
--- a/library.rb
+++ b/library.rb
@@ -24,13 +24,23 @@ end
 
 $ic = "TSSOP"
 
-IC = Struct.new(:value, :pincount, :subparts, :automatic)
-
-$ic_definitions = {}
-$ic_available_parts = {}
-
 def define_ic(name, value, pincount, *subparts, &automatic)
-  $ic_definitions[name] = IC.new(value, pincount, subparts, automatic)
+  parts = []
+  proc do
+    if parts.size < 1
+      ic = comp("U", "#{$ic}-#{pincount}", name, value)
+      automatic.call(ic)
+      subs = subparts.map { | sub | sub.map { | pin | ic[pin] } }
+      subs.each do | sub |
+        if sub.size == 2
+          parts << pair(*sub)
+        else
+          parts << sub
+        end
+      end
+    end
+    parts.shift
+  end
 end
 
 def stock_ic(name, value, &automatic)
@@ -40,27 +50,6 @@ def stock_ic(name, value, &automatic)
   end
 end
 
-def ic(name)
-  parts = $ic_available_parts.fetch(name, [])
-  if parts.size < 1
-    raise "IC #{name} not defined!" unless $ic_definitions.member?(name)
-    info = $ic_definitions[name]
-    ic = comp("U", "#{$ic}-#{info.pincount}", name, info.value)
-    info.automatic.call(ic)
-    subs = info.subparts.map { | sub | sub.map { | pin | ic[pin] } }
-    subs.each do | sub |
-      if sub.size == 2
-        parts << pair(*sub)
-      else
-        parts << sub
-      end
-    end
-  end
-  part = parts.shift
-  $ic_available_parts[name] = parts
-  return part
-end
-
 def probe(attenuation=20, impedance=50)
   jack = comp("J", "SMB", "SMB jack", "#{attenuation}x #{impedance}Ω probe")
   jack[2] - jack[3] - jack[4] - jack[5]
diff --git a/test.rb b/test.rb
index d6cfbe2..e7f8b49 100755
--- a/test.rb
+++ b/test.rb
@@ -7,18 +7,18 @@ nl = Lace::Netlist.new do
   vcc = net("vcc")
   gnd = net("gnd")
 
-  stock_ic("inverter", "CD74HC04") do | ic |
+  define_singleton_method(:inverter, stock_ic("inverter", "CD74HC04") do | ic |
     vcc - ic[14] - c("100nF") - ic[7] - gnd
-  end
+  end)
 
   vcc - led(220) - gnd
 
   vcc - btn - led(220, "green") - gnd
-  vcc - btn("orange") - ic("inverter") - led(220, "white") - gnd
+  vcc - btn("orange") - inverter - led(220, "white") - gnd
 
   x = vcc - btn("white")
   x - net("x") - led(220, "amber") - gnd
-  x - ic("inverter") - net("xbar") - led(220, "blue") - gnd
+  x - inverter - net("xbar") - led(220, "blue") - gnd
   x - probe - gnd
 end