Function enableDebugInfo

test/fixtures/snapshot/typescript.js:3029–3205

* Injects debug information into frequently used types.

()

         * Injects debug information into frequently used types.
         */
        function enableDebugInfo() {
            if (isDebugInfoEnabled)
                return;
            // avoid recomputing
            var weakTypeTextMap;
            var weakNodeTextMap;
            function getWeakTypeTextMap() {
                if (weakTypeTextMap === undefined) {
                    if (typeof WeakMap === "function")
                        weakTypeTextMap = new WeakMap();
                }
                return weakTypeTextMap;
            }
            function getWeakNodeTextMap() {
                if (weakNodeTextMap === undefined) {
                    if (typeof WeakMap === "function")
                        weakNodeTextMap = new WeakMap();
                }
                return weakNodeTextMap;
            }
            // Add additional properties in debug mode to assist with debugging.
            Object.defineProperties(ts.objectAllocator.getSymbolConstructor().prototype, {
                // for use with vscode-js-debug's new customDescriptionGenerator in launch.json
                __tsDebuggerDisplay: {
                    value: function () {
                        var symbolHeader = this.flags & 33554432 /* SymbolFlags.Transient */ ? "TransientSymbol" :
                            "Symbol";
                        var remainingSymbolFlags = this.flags & ~33554432 /* SymbolFlags.Transient */;
                        return "".concat(symbolHeader, " '").concat(ts.symbolName(this), "'").concat(remainingSymbolFlags ? " (".concat(formatSymbolFlags(remainingSymbolFlags), ")") : "");
                    }
                },
                __debugFlags: { get: function () { return formatSymbolFlags(this.flags); } }
            });
            Object.defineProperties(ts.objectAllocator.getTypeConstructor().prototype, {
                // for use with vscode-js-debug's new customDescriptionGenerator in launch.json
                __tsDebuggerDisplay: {
                    value: function () {
                        var typeHeader = this.flags & 98304 /* TypeFlags.Nullable */ ? "NullableType" :
                            this.flags & 384 /* TypeFlags.StringOrNumberLiteral */ ? "LiteralType ".concat(JSON.stringify(this.value)) :
                                this.flags & 2048 /* TypeFlags.BigIntLiteral */ ? "LiteralType ".concat(this.value.negative ? "-" : "").concat(this.value.base10Value, "n") :
                                    this.flags & 8192 /* TypeFlags.UniqueESSymbol */ ? "UniqueESSymbolType" :
                                        this.flags & 32 /* TypeFlags.Enum */ ? "EnumType" :
                                            this.flags & 67359327 /* TypeFlags.Intrinsic */ ? "IntrinsicType ".concat(this.intrinsicName) :
                                                this.flags & 1048576 /* TypeFlags.Union */ ? "UnionType" :
                                                    this.flags & 2097152 /* TypeFlags.Intersection */ ? "IntersectionType" :
                                                        this.flags & 4194304 /* TypeFlags.Index */ ? "IndexType" :
                                                            this.flags & 8388608 /* TypeFlags.IndexedAccess */ ? "IndexedAccessType" :
                                                                this.flags & 16777216 /* TypeFlags.Conditional */ ? "ConditionalType" :
                                                                    this.flags & 33554432 /* TypeFlags.Substitution */ ? "SubstitutionType" :
                                                                        this.flags & 262144 /* TypeFlags.TypeParameter */ ? "TypeParameter" :
                                                                            this.flags & 524288 /* TypeFlags.Object */ ?
                                                                                this.objectFlags & 3 /* ObjectFlags.ClassOrInterface */ ? "InterfaceType" :
                                                                                    this.objectFlags & 4 /* ObjectFlags.Reference */ ? "TypeReference" :
                                                                                        this.objectFlags & 8 /* ObjectFlags.Tuple */ ? "TupleType" :
                                                                                            this.objectFlags & 16 /* ObjectFlags.Anonymous */ ? "AnonymousType" :
                                                                                                this.objectFlags & 32 /* ObjectFlags.Mapped */ ? "MappedType" :
                                                                                                    this.objectFlags & 1024 /* ObjectFlags.ReverseMapped */ ? "ReverseMappedType" :
                                                                                                        this.objectFlags & 256 /* ObjectFlags.EvolvingArray */ ? "EvolvingArrayType" :