tiny-decoders - npm Package Compare versions

Comparing version 15.1.0 to 16.0.0

index.d.ts

@@ -1,9 +0,18 @@
-export type Decoder<T, U = unknown> = (value: U) => T;
-export type Infer<T extends Decoder<any>> = ReturnType<T>;
+export type Decoder<T, U = unknown> = (value: U) => DecoderResult<T>;
+export type DecoderResult<T> = {
+    tag: "DecoderError";
+    error: DecoderError;
+} | {
+    tag: "Valid";
+    value: T;
+};
+export type Infer<T extends Decoder<any>> = Extract<ReturnType<T>, {
+    tag: "Valid";
+}>["value"];
 type Expand<T> = T extends infer O ? {
     [K in keyof O]: O[K];
 } : never;
-export declare function boolean(value: unknown): boolean;
-export declare function number(value: unknown): number;
-export declare function string(value: unknown): string;
+export declare function boolean(value: unknown): DecoderResult<boolean>;
+export declare function number(value: unknown): DecoderResult<number>;
+export declare function string(value: unknown): DecoderResult<string>;
 export declare function stringUnion<const T extends readonly [string, ...Array<string>]>(variants: T): Decoder<T[number]>;
@@ -116,4 +125,8 @@ export declare function array<T>(decoder: Decoder<T>): Decoder<Array<T>>;
 export declare function nullable<T, U>(decoder: Decoder<T>, defaultValue: U): Decoder<T | U>;
-export declare function chain<T, U>(decoder: Decoder<T>, next: Decoder<U, T>): Decoder<U>;
-export type DecoderErrorVariant = {
+export declare function map<T, U>(decoder: Decoder<T>, transform: (value: T) => U): Decoder<U>;
+export declare function flatMap<T, U>(decoder: Decoder<T>, transform: (value: T) => DecoderResult<U>): Decoder<U>;
+export type DecoderError = {
+    path: Array<number | string>;
+    orExpected?: "null or undefined" | "null" | "undefined";
+} & ({
     tag: "custom";
@@ -165,20 +178,4 @@ message: string;
     got: unknown;
-};
-type Key = number | string;
-export declare class DecoderError extends TypeError {
-    path: Array<Key>;
-    variant: DecoderErrorVariant;
-    nullable: boolean;
-    optional: boolean;
-    constructor({ key, ...params }: {
-        message: string;
-        value: unknown;
-        key?: Key | undefined;
-    } | (DecoderErrorVariant & {
-        key?: Key | undefined;
-    }));
-    static MISSING_VALUE: symbol;
-    static at(error: unknown, key?: Key): DecoderError;
-    format(options?: ReprOptions): string;
-}
+});
+export declare function format(error: DecoderError, options?: ReprOptions): string;
 export type ReprOptions = {
@@ -185,0 +182,0 @@ depth?: number | undefined;

package.json

 {
   "name": "tiny-decoders",
-  "version": "15.1.0",
+  "version": "16.0.0",
   "license": "MIT",
@@ -5,0 +5,0 @@ "author": "Simon Lydell",

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Improved metrics

Total package byte prevSize

53644

increased by17.67%

Lines of code

1417

increased by18.38%

No dependency changes