Function checkMemberForOverrideModifier

test/fixtures/snapshot/typescript.js:84244–84303

* Checks a class member declaration for either a missing or an invalid `override` modifier. * Note: this function can be used for speculative checking, * i.e. checking a member that does not yet exist in the program. * An example of that would be to call this function in a

(node, staticType, baseStaticType, baseWithThis, type, typeWithThis, memberHasOverrideModifier, memberHasAbstractModifier, memberIsStatic, memberIsParameterProperty, memberName, errorNode)

         * @param errorNode The node where we should report an error, or undefined if we should not report errors.
         */
        function checkMemberForOverrideModifier(node, staticType, baseStaticType, baseWithThis, type, typeWithThis, memberHasOverrideModifier, memberHasAbstractModifier, memberIsStatic, memberIsParameterProperty, memberName, errorNode) {
            var isJs = ts.isInJSFile(node);
            var nodeInAmbientContext = !!(node.flags & 16777216 /* NodeFlags.Ambient */);
            if (baseWithThis && (memberHasOverrideModifier || compilerOptions.noImplicitOverride)) {
                var memberEscapedName = ts.escapeLeadingUnderscores(memberName);
                var thisType = memberIsStatic ? staticType : typeWithThis;
                var baseType = memberIsStatic ? baseStaticType : baseWithThis;
                var prop = getPropertyOfType(thisType, memberEscapedName);
                var baseProp = getPropertyOfType(baseType, memberEscapedName);
                var baseClassName = typeToString(baseWithThis);
                if (prop && !baseProp && memberHasOverrideModifier) {
                    if (errorNode) {
                        var suggestion = getSuggestedSymbolForNonexistentClassMember(memberName, baseType); // Again, using symbol name: note that's different from `symbol.escapedName`
                        suggestion ?
                            error(errorNode, isJs ?
                                ts.Diagnostics.This_member_cannot_have_a_JSDoc_comment_with_an_override_tag_because_it_is_not_declared_in_the_base_class_0_Did_you_mean_1 :
                                ts.Diagnostics.This_member_cannot_have_an_override_modifier_because_it_is_not_declared_in_the_base_class_0_Did_you_mean_1, baseClassName, symbolToString(suggestion)) :
                            error(errorNode, isJs ?
                                ts.Diagnostics.This_member_cannot_have_a_JSDoc_comment_with_an_override_tag_because_it_is_not_declared_in_the_base_class_0 :
                                ts.Diagnostics.This_member_cannot_have_an_override_modifier_because_it_is_not_declared_in_the_base_class_0, baseClassName);
                    }
                    return 2 /* MemberOverrideStatus.HasInvalidOverride */;
                }
                else if (prop && (baseProp === null || baseProp === void 0 ? void 0 : baseProp.declarations) && compilerOptions.noImplicitOverride && !nodeInAmbientContext) {
                    var baseHasAbstract = ts.some(baseProp.declarations, ts.hasAbstractModifier);
                    if (memberHasOverrideModifier) {
                        return 0 /* MemberOverrideStatus.Ok */;
                    }
                    if (!baseHasAbstract) {
                        if (errorNode) {
                            var diag = memberIsParameterProperty ?
                                isJs ?
                                    ts.Diagnostics.This_parameter_property_must_have_a_JSDoc_comment_with_an_override_tag_because_it_overrides_a_member_in_the_base_class_0 :
                                    ts.Diagnostics.This_parameter_property_must_have_an_override_modifier_because_it_overrides_a_member_in_base_class_0 :
                                isJs ?
                                    ts.Diagnostics.This_member_must_have_a_JSDoc_comment_with_an_override_tag_because_it_overrides_a_member_in_the_base_class_0 :
                                    ts.Diagnostics.This_member_must_have_an_override_modifier_because_it_overrides_a_member_in_the_base_class_0;
                            error(errorNode, diag, baseClassName);
                        }
                        return 1 /* MemberOverrideStatus.NeedsOverride */;
                    }
                    else if (memberHasAbstractModifier && baseHasAbstract) {
                        if (errorNode) {
                            error(errorNode, ts.Diagnostics.This_member_must_have_an_override_modifier_because_it_overrides_an_abstract_method_that_is_declared_in_the_base_class_0, baseClassName);
                        }
                        return 1 /* MemberOverrideStatus.NeedsOverride */;
                    }
                }
            }
            else if (memberHasOverrideModifier) {
                if (errorNode) {
                    var className = typeToString(type);
                    error(errorNode, isJs ?
                        ts.Diagnostics.This_member_cannot_have_a_JSDoc_comment_with_an_override_tag_because_its_containing_class_0_does_not_extend_another_class :
                        ts.Diagnostics.This_member_cannot_have_an_override_modifier_because_its_containing_class_0_does_not_extend_another_class, className);
                }
                return 2 /* MemberOverrideStatus.HasInvalidOverride */;
            }