fix typings

Author: DemChing

src/core-loader.ts

@@ -1,7 +1,7 @@
 import postcss, { AcceptedPlugin } from 'postcss'
 
 import Parser, { PathFetcher, ExportTokens } from './parser';
-import { defaultPlugins, values, localByDefault, extractImports, scope } from './plugins';
+import { defaultPlugins, values, localByDefault, extractImports, scope, Source } from './plugins';
 
 export interface CoreResult {
   injectableSource: string,
@@ -23,7 +23,7 @@ export default class CoreLoader {
   }
 
   load(
-    sourceString: string,
+    sourceString: Source,
     sourcePath: string = '',
     trace: string = '',
     pathFetcher: PathFetcher = CoreLoader.defaultPathFetcher

src/file-system-loader.ts

@@ -4,6 +4,7 @@ import { AcceptedPlugin } from 'postcss';
 
 import CoreLoader, { CoreResult } from './core-loader';
 import { ExportTokens } from './parser';
+import { Source } from './plugins';
 
 export default class FileSystemLoader {
   static defaultPlugins = CoreLoader.defaultPlugins;
@@ -41,8 +42,8 @@ export default class FileSystemLoader {
     }
   };
 
-  load(file: string, relativeTo?: string, depTrace?: string): Promise<CoreResult> {
-    return this.pathFetcher(file, relativeTo, depTrace)
+  load(sourceString: Source, relativeTo?: string, depTrace?: string): Promise<CoreResult> {
+    return this.pathFetcher(sourceString.toString(), relativeTo, depTrace)
       .then(exportTokens => {
         let written = new Set(),
           injectableSources: string[] = [];

src/index.ts

@@ -1,3 +1,4 @@
-export { default as default, CoreResult } from './core-loader';
+export { default as default, CoreResult as Result } from './core-loader';
 export { default as FileSystemLoader } from './file-system-loader';
 export { ExportTokens, PathFetcher } from './parser';
+export { Source } from './plugins';

src/plugins.ts

@@ -9,6 +9,10 @@ export const extractImports: AcceptedPlugin = ExtractImports;
 export const scope: AcceptedPlugin = Scope;
 export const values: AcceptedPlugin = Values;
 
+export type Source = string | {
+    toString(): string;
+};
+
 export const defaultPlugins = [
     values,
     localByDefault,