feat(fsfoundation): Add type alias for getting function argument types

brandingbrand · Nov 2, 2018 · be36449 · be36449
1 parent 24c093e
commit be36449
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diff --git a/packages/fsfoundation/src/Arguments.ts b/packages/fsfoundation/src/Arguments.ts
@@ -0,0 +1,9 @@
+/**
+ * Extracts the types of a given function's arguments
+ *
+ * Example:
+ * type MyFunction = (arg1: string, arg2: number) => void;
+ * type Args = Arguments<MyFunction>; // Args is [string, number]
+ *
+ */
+export type Arguments<F extends Function> = F extends (...args: infer A) => any ? A : never;
diff --git a/packages/fsfoundation/src/index.ts b/packages/fsfoundation/src/index.ts
@@ -1,3 +1,4 @@
+export * from './Arguments';
 export * from './DeepPartial';
 export * from './Dictionary';
 export * from './Distance';