fix for private field no initializer esnext

mheiber · mheiber · commit b8ff603e659a · 2019-12-23T15:24:57.000Z
diff --git a/src/compiler/transformers/classFields.ts b/src/compiler/transformers/classFields.ts
@@ -769,6 +769,9 @@ namespace ts {
                     Debug.fail("Undeclared private name for property declaration.");
                 }
             }
+            if (isPrivateIdentifier(propertyName) && !property.initializer) {
+                return undefined;
+            }
 
             const initializer = property.initializer || emitAssignment ? visitNode(property.initializer, visitor, isExpression)
                 : hasModifier(getOriginalNode(property), ModifierFlags.ParameterPropertyModifier) && isIdentifier(propertyName) ? propertyName

Original file line number	Diff line number	Diff line change
`@@ -769,6 +769,9 @@ namespace ts {`
`769`	`769`	`Debug.fail("Undeclared private name for property declaration.");`
`770`	`770`	`}`
`771`	`771`	`}`
	`772`	`+ if (isPrivateIdentifier(propertyName) && !property.initializer) {`
	`773`	`+ return undefined;`
	`774`	`+ }`
`772`	`775`
`773`	`776`	`const initializer = property.initializer \|\| emitAssignment ? visitNode(property.initializer, visitor, isExpression)`
`774`	`777`	`: hasModifier(getOriginalNode(property), ModifierFlags.ParameterPropertyModifier) && isIdentifier(propertyName) ? propertyName`