Simplify.

mbostock · mbostock · commit 008758707ba5 · 2018-11-05T18:43:01.000-08:00
diff --git a/index.js b/index.js
@@ -22,7 +22,7 @@ function observable(Parser) {
       return super.enterScope.apply(this, arguments);
     }
     exitScope() {
-      if (this.scopeStack[this.scopeStack.length - 1] & SCOPE_FUNCTION) --this.O_function;
+      if (this.currentScope() & SCOPE_FUNCTION) --this.O_function;
       return super.exitScope.apply(this, arguments);
     }
     parseForIn(node) {

Original file line number	Diff line number	Diff line change
`@@ -22,7 +22,7 @@ function observable(Parser) {`
`22`	`22`	`return super.enterScope.apply(this, arguments);`
`23`	`23`	`}`
`24`	`24`	`exitScope() {`
`25`		`- if (this.scopeStack[this.scopeStack.length - 1] & SCOPE_FUNCTION) --this.O_function;`
	`25`	`+ if (this.currentScope() & SCOPE_FUNCTION) --this.O_function;`
`26`	`26`	`return super.exitScope.apply(this, arguments);`
`27`	`27`	`}`
`28`	`28`	`parseForIn(node) {`