Add prettier configuration

.prettierrc

@@ -0,0 +1,14 @@
+{
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "none",
+	"printWidth": 100,
+	"overrides": [
+		{
+			"files": ["**/CHANGELOG.md", "**/vite.config.js.timestamp-*", "**/test-results/**"],
+			"options": {
+				"rangeEnd": 0
+			}
+		}
+	]
+}

benchmarking/benchmarks/typed-array.js

@@ -26,7 +26,7 @@ export default [
 					stringify(value);
 				}
 			});
-		},
+		}
 	},
 
 	{
@@ -44,7 +44,7 @@ export default [
 					stringify(value);
 				}
 			});
-		},
+		}
 	},
 
 	{
@@ -62,7 +62,7 @@ export default [
 					stringify(value);
 				}
 			});
-		},
+		}
 	},
 
 	{
@@ -80,7 +80,7 @@ export default [
 					parse(string);
 				}
 			});
-		},
+		}
 	},
 
 	{
@@ -98,7 +98,7 @@ export default [
 					parse(string);
 				}
 			});
-		},
+		}
 	},
 
 	{
@@ -116,6 +116,6 @@ export default [
 					parse(string);
 				}
 			});
-		},
-	},
+		}
+	}
 ];

benchmarking/compare/index.js

@@ -10,7 +10,7 @@ const is_jj = execSync('git for-each-ref --count=1 refs/jj/').length > 0;
 const current_ref = exec(
 	is_jj
 		? 'jj show --no-patch --template change_id'
-		: 'git symbolic-ref --short -q HEAD || git rev-parse --short HEAD',
+		: 'git symbolic-ref --short -q HEAD || git rev-parse --short HEAD'
 );
 
 /** @type {(branch: string) => void} */
@@ -95,9 +95,7 @@ for (let i = 0; i < results[0].length; i += 1) {
 				const SIZE = 20;
 				const n = Math.round(SIZE * (time / max));
 
-				console.log(
-					`${char(b)}: ${'◼'.repeat(n)}${' '.repeat(SIZE - n)} ${time.toFixed(2)}ms`,
-				);
+				console.log(`${char(b)}: ${'◼'.repeat(n)}${' '.repeat(SIZE - n)} ${time.toFixed(2)}ms`);
 			});
 			console.groupEnd();
 		}

benchmarking/run.js

@@ -9,8 +9,8 @@ const filter_fn = filters.length ? (b) => filters.some((f) => b.label.includes(f
 const suites = [
 	{
 		name: 'TypedArray benchmarks',
-		benchmarks: typed_array_benchmarks.filter(filter_fn),
-	},
+		benchmarks: typed_array_benchmarks.filter(filter_fn)
+	}
 ].filter((suite) => suite.benchmarks.length > 0);
 
 if (suites.length === 0) {
@@ -39,7 +39,7 @@ try {
 		console.log(
 			pad_right('Benchmark', COLUMN_WIDTHS[0]) +
 				pad_left('Time', COLUMN_WIDTHS[1]) +
-				pad_left('GC time', COLUMN_WIDTHS[2]),
+				pad_left('GC time', COLUMN_WIDTHS[2])
 		);
 		console.log('='.repeat(TOTAL_WIDTH));
 
@@ -48,7 +48,7 @@ try {
 			console.log(
 				pad_right(benchmark.label, COLUMN_WIDTHS[0]) +
 					pad_left(results.time.toFixed(2), COLUMN_WIDTHS[1]) +
-					pad_left(results.gc_time.toFixed(2), COLUMN_WIDTHS[2]),
+					pad_left(results.gc_time.toFixed(2), COLUMN_WIDTHS[2])
 			);
 			total_time += results.time;
 			total_gc_time += results.gc_time;
@@ -60,7 +60,7 @@ try {
 		console.log(
 			pad_right('suite', COLUMN_WIDTHS[0]) +
 				pad_left(suite_time.toFixed(2), COLUMN_WIDTHS[1]) +
-				pad_left(suite_gc_time.toFixed(2), COLUMN_WIDTHS[2]),
+				pad_left(suite_gc_time.toFixed(2), COLUMN_WIDTHS[2])
 		);
 		console.log('='.repeat(TOTAL_WIDTH));
 	}
@@ -74,5 +74,5 @@ console.log('');
 console.log(
 	pad_right('total', COLUMN_WIDTHS[0]) +
 		pad_left(total_time.toFixed(2), COLUMN_WIDTHS[1]) +
-		pad_left(total_gc_time.toFixed(2), COLUMN_WIDTHS[2]),
+		pad_left(total_gc_time.toFixed(2), COLUMN_WIDTHS[2])
 );

src/base64.js

@@ -54,16 +54,7 @@ export function decode_legacy(base64) {
 }
 
 const native = typeof Uint8Array.fromBase64 === 'function';
-const buffer =
-	typeof process === 'object' && process.versions?.node !== undefined;
+const buffer = typeof process === 'object' && process.versions?.node !== undefined;
 
-export const encode64 = native
-	? encode_native
-	: buffer
-	? encode_buffer
-	: encode_legacy;
-export const decode64 = native
-	? decode_native
-	: buffer
-	? decode_buffer
-	: decode_legacy;
+export const encode64 = native ? encode_native : buffer ? encode_buffer : encode_legacy;
+export const decode64 = native ? decode_native : buffer ? decode_buffer : decode_legacy;

src/parse.js

@@ -66,10 +66,7 @@ export function unflatten(parsed, revivers) {
 			if (typeof value[0] === 'string') {
 				const type = value[0];
 
-				const reviver =
-					revivers && Object.hasOwn(revivers, type)
-						? revivers[type]
-						: undefined;
+				const reviver = revivers && Object.hasOwn(revivers, type) ? revivers[type] : undefined;
 
 				if (reviver) {
 					let i = value[1];
@@ -165,9 +162,10 @@ export function unflatten(parsed, revivers) {
 						const TypedArrayConstructor = globalThis[type];
 						const buffer = hydrate(value[1]);
 
-						hydrated[index] = value[2] !== undefined
-							? new TypedArrayConstructor(buffer, value[2], value[3])
-							: new TypedArrayConstructor(buffer);
+						hydrated[index] =
+							value[2] !== undefined
+								? new TypedArrayConstructor(buffer, value[2], value[3])
+								: new TypedArrayConstructor(buffer);
 
 						break;
 					}

src/stringify.js

@@ -52,7 +52,7 @@ export function stringify(value, reducers) {
 		if (thing === -Infinity) return NEGATIVE_INFINITY;
 		if (thing === 0 && 1 / thing < 0) return NEGATIVE_ZERO;
 
-		if (indexes.has(thing)) return indexes.get(thing);
+		if (indexes.has(thing)) return /** @type {number} */ (indexes.get(thing));
 
 		const index = p++;
 		indexes.set(thing, index);
@@ -205,9 +205,7 @@ export function stringify(value, reducers) {
 					str = '["Map"';
 
 					for (const [key, value] of thing) {
-						keys.push(
-							`.get(${is_primitive(key) ? stringify_primitive(key) : '...'})`
-						);
+						keys.push(`.get(${is_primitive(key) ? stringify_primitive(key) : '...'})`);
 						str += `,${flatten(key)},${flatten(value)}`;
 						keys.pop();
 					}
@@ -263,21 +261,11 @@ export function stringify(value, reducers) {
 
 				default:
 					if (!is_plain_object(thing)) {
-						throw new DevalueError(
-							`Cannot stringify arbitrary non-POJOs`,
-							keys,
-							thing,
-							value
-						);
+						throw new DevalueError(`Cannot stringify arbitrary non-POJOs`, keys, thing, value);
 					}
 
 					if (enumerable_symbols(thing).length > 0) {
-						throw new DevalueError(
-							`Cannot stringify POJOs with symbolic keys`,
-							keys,
-							thing,
-							value
-						);
+						throw new DevalueError(`Cannot stringify POJOs with symbolic keys`, keys, thing, value);
 					}
 
 					if (Object.getPrototypeOf(thing) === null) {

src/types.d.ts

@@ -1 +1,13 @@
-export type TypedArray = Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Float16Array | Int32Array | Uint32Array | Float32Array | Float64Array | BigInt64Array | BigUint64Array;
+export type TypedArray =
+	| Int8Array
+	| Uint8Array
+	| Uint8ClampedArray
+	| Int16Array
+	| Uint16Array
+	| Float16Array
+	| Int32Array
+	| Uint32Array
+	| Float32Array
+	| Float64Array
+	| BigInt64Array
+	| BigUint64Array;

src/uneval.js

@@ -78,9 +78,7 @@ export function uneval(value, replacer) {
 
 				case 'Map':
 					for (const [key, value] of thing) {
-						keys.push(
-							`.get(${is_primitive(key) ? stringify_primitive(key) : '...'})`
-						);
+						keys.push(`.get(${is_primitive(key) ? stringify_primitive(key) : '...'})`);
 						walk(value);
 						keys.pop();
 					}
@@ -116,21 +114,11 @@ export function uneval(value, replacer) {
 
 				default:
 					if (!is_plain_object(thing)) {
-						throw new DevalueError(
-							`Cannot stringify arbitrary non-POJOs`,
-							keys,
-							thing,
-							value
-						);
+						throw new DevalueError(`Cannot stringify arbitrary non-POJOs`, keys, thing, value);
 					}
 
 					if (enumerable_symbols(thing).length > 0) {
-						throw new DevalueError(
-							`Cannot stringify POJOs with symbolic keys`,
-							keys,
-							thing,
-							value
-						);
+						throw new DevalueError(`Cannot stringify POJOs with symbolic keys`, keys, thing, value);
 					}
 
 					for (const key of Object.keys(thing)) {
@@ -188,9 +176,7 @@ export function uneval(value, replacer) {
 				return `Object(${stringify(thing.valueOf())})`;
 
 			case 'RegExp':
-				return `new RegExp(${stringify_string(thing.source)}, "${
-					thing.flags
-				}")`;
+				return `new RegExp(${stringify_string(thing.source)}, "${thing.flags}")`;
 
 			case 'Date':
 				return `new Date(${thing.getTime()})`;
@@ -260,12 +246,10 @@ export function uneval(value, replacer) {
 						const d = String(thing.length).length;
 
 						const hole_cost = thing.length + 2;
-						const sparse_cost = (25 + d) + population * (d + 2);
+						const sparse_cost = 25 + d + population * (d + 2);
 
 						if (hole_cost > sparse_cost) {
-							const entries = populated_keys
-								.map((k) => `${k}:${stringify(thing[k])}`)
-								.join(',');
+							const entries = populated_keys.map((k) => `${k}:${stringify(thing[k])}`).join(',');
 							return `Object.assign(Array(${thing.length}),{${entries}})`;
 						}
 
@@ -333,14 +317,10 @@ export function uneval(value, replacer) {
 
 			default:
 				const keys = Object.keys(thing);
-				const obj = keys
-					.map((key) => `${safe_key(key)}:${stringify(thing[key])}`)
-					.join(',');
+				const obj = keys.map((key) => `${safe_key(key)}:${stringify(thing[key])}`).join(',');
 				const proto = Object.getPrototypeOf(thing);
 				if (proto === null) {
-					return keys.length > 0
-						? `{${obj},__proto__:null}`
-						: `{__proto__:null}`;
+					return keys.length > 0 ? `{${obj},__proto__:null}` : `{__proto__:null}`;
 				}
 
 				return `{${obj}}`;
@@ -415,28 +395,20 @@ export function uneval(value, replacer) {
 					break;
 
 				case 'ArrayBuffer':
-					values.push(
-						`new Uint8Array([${new Uint8Array(thing).join(',')}]).buffer`
-					);
+					values.push(`new Uint8Array([${new Uint8Array(thing).join(',')}]).buffer`);
 					break;
 
 				default:
-					values.push(
-						Object.getPrototypeOf(thing) === null ? 'Object.create(null)' : '{}'
-					);
+					values.push(Object.getPrototypeOf(thing) === null ? 'Object.create(null)' : '{}');
 					Object.keys(thing).forEach((key) => {
-						statements.push(
-							`${name}${safe_prop(key)}=${stringify(thing[key])}`
-						);
+						statements.push(`${name}${safe_prop(key)}=${stringify(thing[key])}`);
 					});
 			}
 		});
 
 		statements.push(`return ${str}`);
 
-		return `(function(${params.join(',')}){${statements.join(
-			';'
-		)}}(${values.join(',')}))`;
+		return `(function(${params.join(',')}){${statements.join(';')}}(${values.join(',')}))`;
 	} else {
 		return str;
 	}
@@ -466,9 +438,7 @@ function escape_unsafe_chars(str) {
 
 /** @param {string} key */
 function safe_key(key) {
-	return /^[_$a-zA-Z][_$a-zA-Z0-9]*$/.test(key)
-		? key
-		: escape_unsafe_chars(JSON.stringify(key));
+	return /^[_$a-zA-Z][_$a-zA-Z0-9]*$/.test(key) ? key : escape_unsafe_chars(JSON.stringify(key));
 }
 
 /** @param {string} key */

src/utils.js

@@ -29,12 +29,10 @@ export class DevalueError extends Error {
 
 /** @param {any} thing */
 export function is_primitive(thing) {
-	return Object(thing) !== thing;
+	return thing === null || (typeof thing !== 'object' && typeof thing !== 'function');
 }
 
-const object_proto_names = /* @__PURE__ */ Object.getOwnPropertyNames(
-	Object.prototype
-)
+const object_proto_names = /* @__PURE__ */ Object.getOwnPropertyNames(Object.prototype)
 	.sort()
 	.join('\0');
 
@@ -79,9 +77,7 @@ function get_escaped_char(char) {
 		case '\u2029':
 			return '\\u2029';
 		default:
-			return char < ' '
-				? `\\u${char.charCodeAt(0).toString(16).padStart(4, '0')}`
-				: '';
+			return char < ' ' ? `\\u${char.charCodeAt(0).toString(16).padStart(4, '0')}` : '';
 	}
 }
 

src/utils.test.js

@@ -56,8 +56,8 @@ test('handles a single-element array with non-numeric property', () => {
 test('handles array properties pretending to be indices', () => {
 	const arr = ['a', 'b'];
 	arr[-1] = 'negative index';
-	arr[2**32 - 1] = 'too large index';
+	arr[2 ** 32 - 1] = 'too large index';
 	assert.equal(valid_array_indices(arr), ['0', '1']);
-})
+});
 
 test.run();