removed `nitvm` engine from tests

[nit.git] / src / compiler / coloring.nit

diff --git a/src/compiler/coloring.nit b/src/compiler/coloring.nit
index bff3243..80f29ec 100644 (file)
--- a/src/compiler/coloring.nit
+++ b/src/compiler/coloring.nit
@@ -160,9 +160,16 @@ end
 #
 # Possible colors:
 #
-# * A:0, B:1, C: 2, D: 1, E: 3, F:3, G:2, H:4
+# * A: 0
+# * B: 1
+# * C: 2
+# * D: 1
+# * E: 3
+# * F: 3
+# * G: 2
+# * H: 4
 #
-# see: Ducournau, R. (2011).
+# SEE: Ducournau, R. (2011).
 # Coloring, a versatile technique for implementing object-oriented languages.
 # Software: Practice and Experience, 41(6), 627–659.
 class POSetColorer[E: Object]
@@ -171,6 +178,9 @@ class POSetColorer[E: Object]
        var is_colored = false
 
        # Resulting ids
+       #
+       # All ids are strictly positive (`>= 1`).
+       #
        # REQUIRE: is_colored
        fun ids: Map[E, Int] do
                assert is_colored
@@ -216,7 +226,7 @@ class POSetColorer[E: Object]
                ids_cache.clear
                var elements = new HashSet[E].from(poset_cache.to_a)
                for e in poset_cache.linearize(elements) do
-                       ids_cache[e] = ids_cache.length
+                       ids_cache[e] = ids_cache.length + 1
                end
        end