tsutils - npm Package Compare versions

Comparing version 3.20.0 to 3.21.0

CHANGELOG.md

@@ -0,1 +1,8 @@
+# 3.21.0
+
+**Features:**
+
+* added `getWellKnownSymbolPropertyOfType` to reliably get symbol named properties due to changes in typescript@4.3
+* `getPropertyNameOfWellKnownSymbol` is now deprecated
+
 # 3.20.0
@@ -2,0 +9,0 @@

package.json

 {
   "name": "tsutils",
-  "version": "3.20.0",
+  "version": "3.21.0",
   "description": "utilities for working with typescript's AST",
@@ -5,0 +5,0 @@ "scripts": {

util/type.d.ts

@@ -24,2 +24,3 @@ import * as ts from 'typescript';
 export declare function getPropertyOfType(type: ts.Type, name: ts.__String): ts.Symbol | undefined;
+export declare function getWellKnownSymbolPropertyOfType(type: ts.Type, wellKnownSymbolName: string, checker: ts.TypeChecker): ts.Symbol | undefined;
 /** Determines if writing to a certain property of a given type is allowed. */
@@ -26,0 +27,0 @@ export declare function isPropertyReadonlyInType(type: ts.Type, name: ts.__String, checker: ts.TypeChecker): boolean;

util/type.js

 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.getBaseClassMemberOfClassElement = exports.getIteratorYieldResultFromIteratorResult = exports.getInstanceTypeOfClassLikeDeclaration = exports.getConstructorTypeOfClassLikeDeclaration = exports.getSymbolOfClassLikeDeclaration = exports.getPropertyNameFromType = exports.symbolHasReadonlyDeclaration = exports.isPropertyReadonlyInType = exports.getPropertyOfType = exports.isBooleanLiteralType = exports.isFalsyType = exports.isThenableType = exports.someTypePart = exports.intersectionTypeParts = exports.unionTypeParts = exports.getCallSignaturesOfType = exports.isTypeAssignableToString = exports.isTypeAssignableToNumber = exports.isOptionalChainingUndefinedMarkerType = exports.removeOptionalChainingUndefinedMarkerType = exports.removeOptionalityFromType = exports.isEmptyObjectType = void 0;
+exports.getBaseClassMemberOfClassElement = exports.getIteratorYieldResultFromIteratorResult = exports.getInstanceTypeOfClassLikeDeclaration = exports.getConstructorTypeOfClassLikeDeclaration = exports.getSymbolOfClassLikeDeclaration = exports.getPropertyNameFromType = exports.symbolHasReadonlyDeclaration = exports.isPropertyReadonlyInType = exports.getWellKnownSymbolPropertyOfType = exports.getPropertyOfType = exports.isBooleanLiteralType = exports.isFalsyType = exports.isThenableType = exports.someTypePart = exports.intersectionTypeParts = exports.unionTypeParts = exports.getCallSignaturesOfType = exports.isTypeAssignableToString = exports.isTypeAssignableToNumber = exports.isOptionalChainingUndefinedMarkerType = exports.removeOptionalChainingUndefinedMarkerType = exports.removeOptionalityFromType = exports.isEmptyObjectType = void 0;
 const ts = require("typescript");
@@ -176,2 +176,22 @@ const type_1 = require("../typeguard/type");
 exports.getPropertyOfType = getPropertyOfType;
+function getWellKnownSymbolPropertyOfType(type, wellKnownSymbolName, checker) {
+    const prefix = '__@' + wellKnownSymbolName;
+    for (const prop of type.getProperties()) {
+        if (!prop.name.startsWith(prefix))
+            continue;
+        const globalSymbol = checker.getApparentType(checker.getTypeAtLocation(prop.valueDeclaration.name.expression)).symbol;
+        if (prop.escapedName === getPropertyNameOfWellKnownSymbol(checker, globalSymbol, wellKnownSymbolName))
+            return prop;
+    }
+    return;
+}
+exports.getWellKnownSymbolPropertyOfType = getWellKnownSymbolPropertyOfType;
+function getPropertyNameOfWellKnownSymbol(checker, symbolConstructor, symbolName) {
+    const knownSymbol = symbolConstructor &&
+        checker.getTypeOfSymbolAtLocation(symbolConstructor, symbolConstructor.valueDeclaration).getProperty(symbolName);
+    const knownSymbolType = knownSymbol && checker.getTypeOfSymbolAtLocation(knownSymbol, knownSymbol.valueDeclaration);
+    if (knownSymbolType && type_1.isUniqueESSymbolType(knownSymbolType))
+        return knownSymbolType.escapedName;
+    return ('__@' + symbolName);
+}
 /** Determines if writing to a certain property of a given type is allowed. */
@@ -254,3 +274,5 @@ function isPropertyReadonlyInType(type, name, checker) {
         return {
-            displayName: `[${type.symbol ? type.symbol.name : type.escapedName.replace(/^__@|@\d+$/g, '')}]`,
+            displayName: `[${type.symbol
+                ? `${isKnownSymbol(type.symbol) ? 'Symbol.' : ''}${type.symbol.name}`
+                : type.escapedName.replace(/^__@|@\d+$/g, '')}]`,
             symbolName: type.escapedName,
@@ -260,2 +282,12 @@ };
 exports.getPropertyNameFromType = getPropertyNameFromType;
+function isKnownSymbol(symbol) {
+    return util_1.isSymbolFlagSet(symbol, ts.SymbolFlags.Property) &&
+        symbol.valueDeclaration !== undefined &&
+        node_1.isInterfaceDeclaration(symbol.valueDeclaration.parent) &&
+        symbol.valueDeclaration.parent.name.text === 'SymbolConstructor' &&
+        isGlobalDeclaration(symbol.valueDeclaration.parent);
+}
+function isGlobalDeclaration(node) {
+    return util_1.isNodeFlagSet(node.parent, ts.NodeFlags.GlobalAugmentation) || node_1.isSourceFile(node.parent) && !ts.isExternalModule(node.parent);
+}
 function getSymbolOfClassLikeDeclaration(node, checker) {
@@ -262,0 +294,0 @@ var _a;

util/util.d.ts

@@ -245,2 +245,3 @@ import * as ts from 'typescript';
 }
+/** @deprecated typescript 4.3 removed the concept of literal well known symbols. Use `getPropertyNameFromType` instead. */
 export declare function getPropertyNameOfWellKnownSymbol(node: WellKnownSymbolLiteral): PropertyName;
@@ -247,0 +248,0 @@ export interface LateBoundPropertyNames {

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Improved metrics

Total package byte prevSize

382326

increased by1.16%

Lines of code

4584

increased by0.81%

No dependency changes