merge.

Author: Mathias Lorenzen

README.md

@@ -60,7 +60,7 @@ console.log(calculator.add(1337, 3)); //prints undefined since second argument d
 console.log(calculator.add(1337, 2)); //prints 10 since second argument matches
 
 //received call with first arg 1 and second arg less than 0
-calculator.received().add(1, Arg.is<number>(x => x < 0));
+calculator.received().add(1, Arg.is(x => x < 0));
 ```
 
 ## What is this - black magic?

src/Arguments.ts

@@ -1,5 +1,10 @@
 export class Arg {
     static any()
+    static any<T extends 'string'>(type: T): Arg & string
+    static any<T extends 'number'>(type: T): Arg & number
+    static any<T extends 'boolean'>(type: T): Arg & boolean
+    static any<T extends 'array'>(type: T): Arg & any[]
+    static any<T extends 'function'>(type: T): Arg & Function
     static any<T extends 'string'|'number'|'boolean'|'symbol'|'undefined'|'object'|'function'|'array'>(type: T)
     static any(type?: string): Argument<any> {
         const description = !type ? '{any arg}' : '{arg matching ' + type + '}';