feat: Remove CoerceEmptyInterface (#2)

__snapshots__/IsEmptyInterface

@@ -1,15 +1,15 @@
 sources/IsEmptyInterface.test.ts(11,27): error TS2554: Expected 1 arguments, but got 0.
 Files:            54
-Lines:         61530
-Nodes:        180467
-Identifiers:   62604
-Symbols:      104007
-Types:         36924
-Memory used: 135129K
+Lines:         61523
+Nodes:        180439
+Identifiers:   62593
+Symbols:      104001
+Types:         36907
+Memory used: 133717K
 I/O read:      0.02s
 I/O write:     0.00s
-Parse time:    0.76s
-Bind time:     0.22s
-Check time:    3.14s
+Parse time:    0.68s
+Bind time:     0.76s
+Check time:    3.13s
 Emit time:     0.00s
-Total time:    4.12s
+Total time:    4.57s

vendor/@material-ui/core/styles/styled.d.ts

@@ -1,4 +1,4 @@
-import { Omit, IsAny, CoerceEmptyInterface } from '@material-ui/types';
+import { Omit } from '@material-ui/types';
 import {
   CreateCSSProperties,
   StyledComponentProps,
@@ -16,20 +16,20 @@ import * as React from 'react';
  */
 export type ComponentCreator<Component extends React.ElementType> = <
   Theme = DefaultTheme,
-  Props extends {} = any
+  Props extends {} = {}
 >(
   styles:
     | CreateCSSProperties<Props>
-    | ((props: { theme: Theme } & CoerceEmptyInterface<Props>) => CreateCSSProperties<Props>),
+    | ((props: { theme: Theme } & Props) => CreateCSSProperties<Props>),
   options?: WithStylesOptions<Theme>,
 ) => React.ComponentType<
   Omit<
     JSX.LibraryManagedAttributes<Component, React.ComponentProps<Component>>,
     'classes' | 'className'
   > &
-    StyledComponentProps<'root'> & { className?: string } & CoerceEmptyInterface<
-      Props extends { theme: Theme } ? Omit<Props, 'theme'> & { theme?: Theme } : Props
-    >
+    StyledComponentProps<'root'> & { className?: string } & (Props extends { theme: Theme }
+      ? Omit<Props, 'theme'> & { theme?: Theme }
+      : Props)
 >;
 
 export interface StyledProps {

vendor/@material-ui/core/styles/withStyles.d.ts

@@ -1,4 +1,4 @@
-import { PropInjector, CoerceEmptyInterface } from '@material-ui/types';
+import { PropInjector } from '@material-ui/types';
 import { Theme } from './createMuiTheme';
 import {
   CreateCSSProperties,
@@ -49,7 +49,4 @@ export default function withStyles<
 >(
   style: Styles<Theme, Props, ClassKey>,
   options?: Options,
-): PropInjector<
-  WithStyles<ClassKey, Options['withTheme']>,
-  StyledComponentProps<ClassKey> & CoerceEmptyInterface<Props>
->;
+): PropInjector<WithStyles<ClassKey, Options['withTheme']>, StyledComponentProps<ClassKey> & Props>;

vendor/@material-ui/styles/styled/styled.d.ts

@@ -1,4 +1,4 @@
-import { Omit, IsAny, CoerceEmptyInterface } from '@material-ui/types';
+import { Omit } from '@material-ui/types';
 import {
   CreateCSSProperties,
   StyledComponentProps,
@@ -12,20 +12,20 @@ import { DefaultTheme } from '../defaultTheme';
  */
 export type ComponentCreator<Component extends React.ElementType> = <
   Theme = DefaultTheme,
-  Props extends {} = any
+  Props extends {} = {}
 >(
   styles:
     | CreateCSSProperties<Props>
-    | ((props: { theme: Theme } & CoerceEmptyInterface<Props>) => CreateCSSProperties<Props>),
+    | ((props: { theme: Theme } & Props) => CreateCSSProperties<Props>),
   options?: WithStylesOptions<Theme>,
 ) => React.ComponentType<
   Omit<
     JSX.LibraryManagedAttributes<Component, React.ComponentProps<Component>>,
     'classes' | 'className'
   > &
-    StyledComponentProps<'root'> & { className?: string } & CoerceEmptyInterface<
-      Props extends { theme: Theme } ? Omit<Props, 'theme'> & { theme?: Theme } : Props
-    >
+    StyledComponentProps<'root'> & { className?: string } & (Props extends { theme: Theme }
+      ? Omit<Props, 'theme'> & { theme?: Theme }
+      : Props)
 >;
 
 export interface StyledProps {

vendor/@material-ui/styles/withStyles/withStyles.d.ts

@@ -1,5 +1,5 @@
 import * as React from 'react';
-import { PropInjector, CoerceEmptyInterface, IsEmptyInterface } from '@material-ui/types';
+import { PropInjector, IsEmptyInterface } from '@material-ui/types';
 import * as CSS from 'csstype';
 import * as JSS from 'jss';
 import { DefaultTheme } from '../defaultTheme';
@@ -83,9 +83,7 @@ export type ClassKeyOfStyles<StylesOrClassKey> = StylesOrClassKey extends string
 /**
  * infers the type of the props used in the styles
  */
-export type PropsOfStyles<StylesType> = StylesType extends Styles<any, infer Props>
-  ? CoerceEmptyInterface<Props>
-  : {};
+export type PropsOfStyles<StylesType> = StylesType extends Styles<any, infer Props> ? Props : {};
 
 /**
  * infers the type of the theme used in the styles

vendor/@material-ui/types/index.d.ts

@@ -51,11 +51,6 @@ export type Overwrite<T, U> = Omit<T, keyof U> & U;
 // https://stackoverflow.com/a/49928360/3406963 without generic branch types
 export type IsAny<T> = 0 extends (1 & T) ? true : false;
 
-/**
- * Returns an empty object type if T is any, otherwise returns T
- */
-export type CoerceEmptyInterface<T> = IsAny<T> extends true ? {} : T;
-
 export type Or<A, B, C = false> = A extends true
   ? true
   : B extends true