08-27-周三_17-09-29

node_modules/graphlib/lib/alg/is-acyclic.js

@@ -0,0 +1,15 @@
+var topsort = require("./topsort");
+
+module.exports = isAcyclic;
+
+function isAcyclic(g) {
+  try {
+    topsort(g);
+  } catch (e) {
+    if (e instanceof topsort.CycleException) {
+      return false;
+    }
+    throw e;
+  }
+  return true;
+}