Extract 'parseClassMember' method (#533)

src/plugins/estree.js

@@ -59,8 +59,9 @@ export default (superClass: Class<Parser>): Class<Parser> => class extends super
     }
   }
 
-  checkGetterSetterParamCount(prop: N.ObjectMethod): void {
+  checkGetterSetterParamCount(prop: N.ObjectMethod | N.ClassMethod): void {
     const paramCount = prop.kind === "get" ? 0 : 1;
+    // $FlowFixMe (prop.value present for ObjectMethod, but for ClassMethod should use prop.params?)
     if (prop.value.params.length !== paramCount) {
       const start = prop.start;
       if (prop.kind === "get") {

src/plugins/flow.js

@@ -1242,7 +1242,7 @@ export default (superClass: Class<Parser>): Class<Parser> => class extends super
     return this.match(tt.colon) || super.isClassProperty();
   }
 
-  isNonstaticConstructor(method: N.ClassMethod): boolean {
+  isNonstaticConstructor(method: N.ClassMethod | N.ClassProperty): boolean {
     return !this.match(tt.colon) && super.isNonstaticConstructor(method);
   }
 
@@ -1281,9 +1281,10 @@ export default (superClass: Class<Parser>): Class<Parser> => class extends super
     }
   }
 
-  parsePropertyName(node: N.ObjectMember): N.Identifier {
+  parsePropertyName(node: N.ObjectOrClassMember): N.Identifier {
     const variance = this.flowParseVariance();
     const key = super.parsePropertyName(node);
+    // $FlowFixMe (variance not defined on ClassPrivateProperty)
     node.variance = variance;
     return key;
   }