microsoft/TypeScript
1
0
Fork 0
mirror of https://github.com/microsoft/TypeScript.git synced 2026-05-09 16:39:46 -05:00
Code Issues Packages Projects Releases 212 Wiki Activity

getSupportedExtensions optimization to reduce allocations

Browse Source
This commit is contained in:
Jason Ramsay
2016-12-09 16:19:51 -08:00
parent 5829ca82d0
commit c40508cf1c
1 changed files with 10 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/compiler/core.ts
View File

@@ -1925,15 +1925,17 @@ namespace ts {
const allSupportedExtensions = supportedTypeScriptExtensions.concat(supportedJavascriptExtensions);
export function getSupportedExtensions(options?: CompilerOptions, extraFileExtensions?: FileExtensionInfo[]): string[] {
let typeScriptHostExtensions: string[] = [];
let allHostExtensions: string[] = [];
if (extraFileExtensions) {
allHostExtensions = ts.map(extraFileExtensions, item => item.extension);
typeScriptHostExtensions = ts.map(ts.filter(extraFileExtensions, item => item.scriptKind === ScriptKind.TS), item => item.extension);
const needAllExtensions = options && options.allowJs;
if (!extraFileExtensions || extraFileExtensions.length === 0) {
return needAllExtensions ? allSupportedExtensions : supportedTypeScriptExtensions;
}
const allTypeScriptExtensions = concatenate(supportedTypeScriptExtensions, typeScriptHostExtensions);
const allExtensions = concatenate(allSupportedExtensions, allHostExtensions);
return options && options.allowJs ? allExtensions : allTypeScriptExtensions;
const extensions = (needAllExtensions ? allSupportedExtensions : supportedTypeScriptExtensions).slice(0);
for (const extInfo of extraFileExtensions) {
if (needAllExtensions || extInfo.scriptKind === ScriptKind.TS) {
extensions.push(extInfo.extension);
}
}
return extensions;
}
export function hasJavaScriptFileExtension(fileName: string) {