refactor(compiler-cli): rename the `BuiltinFn` type to the more generic `KnownFn` (#35191)

This is in preparation of using the `KnownFn` type for known TypeScript
helpers (in addition to built-in functions/methods). This will in turn
allow simplifying the detection of both imported and emitted TypeScript
helpers.

PR Close #35191

packages/compiler-cli/src/ngtsc/partial_evaluator/index.ts

@@ -8,4 +8,4 @@
 
 export {DynamicValue} from './src/dynamic';
 export {ForeignFunctionResolver, PartialEvaluator} from './src/interface';
-export {BuiltinFn, EnumValue, ResolvedValue, ResolvedValueArray, ResolvedValueMap} from './src/result';
+export {EnumValue, KnownFn, ResolvedValue, ResolvedValueArray, ResolvedValueMap} from './src/result';

packages/compiler-cli/src/ngtsc/partial_evaluator/src/builtin.ts

@@ -9,9 +9,9 @@
 import * as ts from 'typescript';
 
 import {DynamicValue} from './dynamic';
-import {BuiltinFn, ResolvedValue, ResolvedValueArray} from './result';
+import {KnownFn, ResolvedValue, ResolvedValueArray} from './result';
 
-export class ArraySliceBuiltinFn extends BuiltinFn {
+export class ArraySliceBuiltinFn extends KnownFn {
   constructor(private lhs: ResolvedValueArray) { super(); }
 
   evaluate(node: ts.CallExpression, args: ResolvedValueArray): ResolvedValue {
@@ -23,7 +23,7 @@ export class ArraySliceBuiltinFn extends BuiltinFn {
   }
 }
 
-export class ArrayConcatBuiltinFn extends BuiltinFn {
+export class ArrayConcatBuiltinFn extends KnownFn {
   constructor(private lhs: ResolvedValueArray) { super(); }
 
   evaluate(node: ts.CallExpression, args: ResolvedValueArray): ResolvedValue {
@@ -41,7 +41,7 @@ export class ArrayConcatBuiltinFn extends BuiltinFn {
   }
 }
 
-export class ObjectAssignBuiltinFn extends BuiltinFn {
+export class ObjectAssignBuiltinFn extends KnownFn {
   evaluate(node: ts.CallExpression, args: ResolvedValueArray): ResolvedValue {
     if (args.length === 0) {
       return DynamicValue.fromUnsupportedSyntax(node);

packages/compiler-cli/src/ngtsc/partial_evaluator/src/interpreter.ts

@@ -18,7 +18,7 @@ import {ArrayConcatBuiltinFn, ArraySliceBuiltinFn} from './builtin';
 import {DynamicValue} from './dynamic';
 import {ForeignFunctionResolver} from './interface';
 import {resolveKnownDeclaration} from './known_declaration';
-import {BuiltinFn, EnumValue, ResolvedModule, ResolvedValue, ResolvedValueArray, ResolvedValueMap} from './result';
+import {EnumValue, KnownFn, ResolvedModule, ResolvedValue, ResolvedValueArray, ResolvedValueMap} from './result';
 import {evaluateTsHelperInline} from './ts_helpers';
 
 
@@ -404,7 +404,7 @@ export class StaticInterpreter {
     }
 
     // If the call refers to a builtin function, attempt to evaluate the function.
-    if (lhs instanceof BuiltinFn) {
+    if (lhs instanceof KnownFn) {
       return lhs.evaluate(node, this.evaluateFunctionArguments(node, context));
     }
 

packages/compiler-cli/src/ngtsc/partial_evaluator/src/result.ts

@@ -22,7 +22,7 @@ import {DynamicValue} from './dynamic';
  * available statically.
  */
 export type ResolvedValue = number | boolean | string | null | undefined | Reference | EnumValue |
-    ResolvedValueArray | ResolvedValueMap | ResolvedModule | BuiltinFn | DynamicValue<unknown>;
+    ResolvedValueArray | ResolvedValueMap | ResolvedModule | KnownFn | DynamicValue<unknown>;
 
 /**
  * An array of `ResolvedValue`s.
@@ -76,8 +76,10 @@ export class EnumValue {
 }
 
 /**
- * An implementation of a builtin function, such as `Array.prototype.slice`.
+ * An implementation of a known function that can be statically evaluated.
+ * It could be a built-in function or method (such as `Array.prototype.slice`) or a TypeScript
+ * helper (such as `__spread`).
  */
-export abstract class BuiltinFn {
+export abstract class KnownFn {
   abstract evaluate(node: ts.CallExpression, args: ResolvedValueArray): ResolvedValue;
 }

packages/compiler-cli/src/ngtsc/partial_evaluator/src/ts_helpers.ts

@@ -16,8 +16,8 @@ import {ResolvedValue, ResolvedValueArray} from './result';
 
 
 /**
- * Instance of the `Object.assign` builtin function. Used for evaluating
- * the "__assign" TypeScript helper.
+ * Instance of the known `Object.assign` built-in function. Used for evaluating
+ * the `__assign` TypeScript helper.
  */
 const objectAssignBuiltinFn = new ObjectAssignBuiltinFn();