Implemented LayerInfo for DRC input/output

- Added a "layers" function too
- Updated tests
- Updated documentation

testdata/drc/drctest.drc

@@ -1,4 +1,6 @@
 
+big_tests = false
+
 verbose(true)
 
 source(File.dirname(__FILE__) + "/drctest.gds", "TOPTOP")
@@ -23,11 +25,15 @@ def run_testsuite(dm, ic, tiled = false)
 
   lb = 100
   
-  a = input(1)
+  a = input(RBA::LayerInfo::new(1, 0))
   b = input(2)
   c = input(3)
   x = input(10)
   y = input(11)
+
+  h = {}
+  layers.each { |l| h[l] = true }
+  h[RBA::LayerInfo::new(1, 0)] || raise("missing layer 1/0 in layers list")
   
   c.is_merged? == false || raise("unexpected value")
   
@@ -40,7 +46,7 @@ def run_testsuite(dm, ic, tiled = false)
   a.and(b).xor(l1).is_empty? || raise("xor not empty")
   tiled || (a.and(b).is_merged? == true || raise("unexpected value"))
   
-  a.xor(b).output(lb + 1, dm)
+  a.xor(b).output(RBA::LayerInfo::new(lb + 1, dm))
   a.xor(b).xor(a ^ b).is_empty? || raise("xor not empty")
   a.not(b).output(lb + 2, dm)
   a.not(b).xor(a - b).is_empty? || raise("xor not empty")

testdata/drc/run_drc_test.sh

@@ -4,7 +4,7 @@
 
 inst=$(dirname $0)
 
-export LD_LIBRARY_PATH=.
+export LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH
 
 make klayout