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refactor(compiler-cli): simplify and clarify `TypeScriptReflectionHost.isClass()` (#36989) 

The comment in this function confused me, so I updated it to clarify that
`isClass()` is not true for un-named classes.

Also, I took the opportunity to use a helper method to simplify the function
itself.

PR Close #36989
This commit is contained in:
Pete Bacon Darwin 2020-05-12 08:19:59 +01:00 committed by Kara Erickson
parent 491da99abe
commit 0066a1ae70
1 changed files with 4 additions and 3 deletions
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7
packages/compiler-cli/src/ngtsc/reflection/src/typescript.ts
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@ -10,6 +10,7 @@ import * as ts from 'typescript';
import {ClassDeclaration, ClassMember, ClassMemberKind, CtorParameter, Declaration, Decorator, FunctionDefinition, Import, isDecoratorIdentifier, ReflectionHost} from './host'; import {ClassDeclaration, ClassMember, ClassMemberKind, CtorParameter, Declaration, Decorator, FunctionDefinition, Import, isDecoratorIdentifier, ReflectionHost} from './host';
import {typeToValue} from './type_to_value'; import {typeToValue} from './type_to_value';
import {isNamedClassDeclaration} from './util';
/** /**
* reflector.ts implements static reflection of declarations using the TypeScript `ts.TypeChecker`. * reflector.ts implements static reflection of declarations using the TypeScript `ts.TypeChecker`.
@ -121,9 +122,9 @@ export class TypeScriptReflectionHost implements ReflectionHost {
} }
isClass(node: ts.Node): node is ClassDeclaration { isClass(node: ts.Node): node is ClassDeclaration {
// In TypeScript code, classes are ts.ClassDeclarations. // For our purposes, classes are "named" ts.ClassDeclarations;
// (`name` can be undefined in unnamed default exports: `default export class { ... }`) // (`node.name` can be undefined in unnamed default exports: `default export class { ... }`).
return ts.isClassDeclaration(node) && (node.name !== undefined) && ts.isIdentifier(node.name); return isNamedClassDeclaration(node);
} }
hasBaseClass(clazz: ClassDeclaration): boolean { hasBaseClass(clazz: ClassDeclaration): boolean {