tiny-decoders - npm Package Compare versions

Comparing version 10.0.0 to 11.0.0

index.d.ts

@@ -19,5 +19,8 @@ export type Decoder<T, U = unknown> = (value: U) => T;
 export declare function string(value: unknown): string;
-export declare function stringUnion<T extends [string, ...Array<string>]>(variants: readonly [...T]): Decoder<T[number]>;
+export declare function stringUnion<const T extends readonly [string, ...Array<string>]>(variants: T): Decoder<T[number]>;
 export declare function array<T>(decoder: Decoder<T>): Decoder<Array<T>>;
 export declare function record<T>(decoder: Decoder<T>): Decoder<Record<string, T>>;
+/**
+ * @deprecated Use `fieldsAuto` instead.
+ */
 export declare function fields<T>(callback: (field: <U>(key: string, decoder: Decoder<U>) => U, object: Record<string, unknown>) => T, { exact, allow, }?: {
@@ -27,7 +30,24 @@ exact?: "allow extra" | "throw";
 }): Decoder<WithUndefinedAsOptional<T>>;
-export declare function fieldsAuto<T extends Record<string, unknown>>(mapping: {
-    [P in keyof T]: P extends "__proto__" ? never : Decoder<T[P]>;
-}, { exact }?: {
+type Field<Decoded, Meta extends FieldMeta> = Meta & {
+    decoder: Decoder<Decoded>;
+};
+type FieldMeta = {
+    renameFrom?: string | undefined;
+    optional?: boolean | undefined;
+};
+type FieldsMapping = Record<string, Decoder<any> | Field<any, FieldMeta>>;
+type InferField<T extends Decoder<any> | Field<any, FieldMeta>> = T extends Field<any, FieldMeta> ? ReturnType<T["decoder"]> : T extends Decoder<any> ? ReturnType<T> : never;
+type InferFields<Mapping extends FieldsMapping> = Expand<{
+    [Key in keyof Mapping as Mapping[Key] extends {
+        optional: true;
+    } ? never : Key]: InferField<Mapping[Key]>;
+} & {
+    [Key in keyof Mapping as Mapping[Key] extends {
+        optional: true;
+    } ? Key : never]?: InferField<Mapping[Key]>;
+}>;
+export declare function fieldsAuto<Mapping extends FieldsMapping>(mapping: Mapping, { exact }?: {
     exact?: "allow extra" | "throw";
-}): Decoder<WithUndefinedAsOptional<T>>;
+}): Decoder<InferFields<Mapping>>;
+export declare function field<Decoded, const Meta extends FieldMeta>(decoder: Decoder<Decoded>, meta: Meta): Field<Decoded, Meta>;
 type Values<T> = T[keyof T];
@@ -39,5 +59,5 @@ export declare function fieldsUnion<T extends Record<string, Decoder<unknown>>>(key: string, mapping: keyof T extends string ? keyof T extends never ? "fieldsUnion must have at least one member" : T : {
 }>>>;
-export declare function tuple<T extends Array<unknown>>(mapping: readonly [...{
+export declare function tuple<T extends Array<unknown>>(mapping: [...{
     [P in keyof T]: Decoder<T[P]>;
-}]): Decoder<[...T]>;
+}]): Decoder<T>;
 type Multi<Types> = Types extends any ? Types extends "undefined" ? {
@@ -66,5 +86,6 @@ type: "undefined";
 type MultiTypeName = "array" | "boolean" | "null" | "number" | "object" | "string" | "undefined";
-export declare function multi<Types extends [MultiTypeName, ...Array<MultiTypeName>]>(types: readonly [...Types]): Decoder<Multi<Types[number]>>;
-export declare function optional<T>(decoder: Decoder<T>): Decoder<T | undefined>;
-export declare function optional<T, U>(decoder: Decoder<T>, defaultValue: U): Decoder<T | U>;
+export declare function multi<Types extends readonly [MultiTypeName, ...Array<MultiTypeName>]>(types: Types): Decoder<Multi<Types[number]>>;
+export declare function recursive<T>(callback: () => Decoder<T>): Decoder<T>;
+export declare function undefinedOr<T>(decoder: Decoder<T>): Decoder<T | undefined>;
+export declare function undefinedOr<T, U>(decoder: Decoder<T>, defaultValue: U): Decoder<T | U>;
 export declare function nullable<T>(decoder: Decoder<T>): Decoder<T | null>;
@@ -82,2 +103,6 @@ export declare function nullable<T, U>(decoder: Decoder<T>, defaultValue: U): Decoder<T | U>;
 } | {
+    tag: "missing field";
+    field: string;
+    got: Record<string, unknown>;
+} | {
     tag: "tuple size";
@@ -123,5 +148,5 @@ expected: number;
         value: unknown;
-        key?: Key;
+        key?: Key | undefined;
     } | (DecoderErrorVariant & {
-        key?: Key;
+        key?: Key | undefined;
     }));
@@ -133,10 +158,10 @@ static MISSING_VALUE: symbol;
 export type ReprOptions = {
-    depth?: number;
-    indent?: string;
-    maxArrayChildren?: number;
-    maxObjectChildren?: number;
-    maxLength?: number;
-    sensitive?: boolean;
+    depth?: number | undefined;
+    indent?: string | undefined;
+    maxArrayChildren?: number | undefined;
+    maxObjectChildren?: number | undefined;
+    maxLength?: number | undefined;
+    sensitive?: boolean | undefined;
 };
 export declare function repr(value: unknown, { depth, indent, maxArrayChildren, maxObjectChildren, maxLength, sensitive, }?: ReprOptions): string;
 export {};

package.json

 {
   "name": "tiny-decoders",
-  "version": "10.0.0",
+  "version": "11.0.0",
   "license": "MIT",
@@ -5,0 +5,0 @@ "author": "Simon Lydell",

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Improved metrics

Total package byte prevSize

43679

increased by10.78%

Lines of code

1170

increased by10.69%

No dependency changes