Fix String dedent

Author: slowcheetah

packages/core-js-types/src/base/proposals/string-dedent.d.ts

@@ -1,16 +1,15 @@
 // https://github.com/tc39/proposal-string-dedent
 
+type CoreJSTemplateTag = (template: TemplateStringsArray, ...values: any[]) => any;
+
 interface StringConstructor {
   /**
    * Template tag that removes common leading whitespace from every line in the resulting string,
    * preserving relative indentation and blank lines.
-   * @param template The template strings array, a single string, and function.
+   * @param template The template strings array or function.
    * @param values Values to be interpolated into the template string.
    * @returns The dedented string.
    */
   dedent(template: { raw: readonly string[] }, ...values: any[]): string;
-  dedent(template: string): string;
-  dedent<R extends string | { raw: readonly string[] }>(
-    fn: (template: { raw: readonly string[] }, ...values: any[]) => R
-  ): (template: { raw: readonly string[] }, ...values: any[]) => string;
+  dedent<T extends CoreJSTemplateTag>(tag: T): T;
 }

tests/type-definitions/global/proposals/string-dedent.test.ts

@@ -8,9 +8,15 @@ const rdedent2: string = String.dedent`line1
 const tpl = Object.assign(['foo', 'bar'], { raw: ['foo', 'bar'] });
 String.dedent(tpl, 1, 2);
 
-String.dedent({ raw: ["a\n  b\n", "\n  c\n"] }, 1, 2);
+String.dedent({ raw: ['a\n  b\n', '\n  c\n'] }, 1, 2);
 
-String.dedent(() => 'template string');
+const myTag = (strings: { raw: readonly string[]}, ...values: (string | number)[]) => {
+  return { strings, values } as const;
+};
+const myAndDedent = String.dedent(myTag);
+myAndDedent`line1
+  line2
+  line3`;
 
 // @ts-expect-error
 'string\ndedent'.dedent();

tests/type-definitions/pure/proposals/string-dedent.test.ts

@@ -8,9 +8,15 @@ const rdedent2: string = stringDedent`line1
 const tpl = Object.assign(['foo', 'bar'], { raw: ['foo', 'bar'] });
 stringDedent(tpl, 1, 2);
 
-stringDedent({ raw: ["a\n  b\n", "\n  c\n"] }, 1, 2);
+stringDedent({ raw: ['a\n  b\n', '\n  c\n'] }, 1, 2);
 
-stringDedent(() => 'template string');
+const myTag = (strings: { raw: readonly string[]}, ...values: (string | number)[]) => {
+  return { strings, values } as const;
+};
+const myAndDedent = stringDedent(myTag);
+myAndDedent`line1
+  line2
+  line3`;
 
 // @ts-expect-error
 stringDedent();