Add expression functions with context boundaries

tools/vscode-gotlin/scripts/validate.js

@@ -82,7 +82,7 @@ for (const declaration of [
 
 const prefixes = new Set(Object.values(snippets).map((snippet) => snippet.prefix));
 for (const prefix of [
-  "dataclass", "genericfun", "genericclass", "tablerow", "embed", "coroutinescope", "launch", "async", "enum", "match", "matchvalue", "mapto", "safe", "nonnull", "resultfun", "resultmatch", "defer", "foreach", "sqlfetch",
+  "dataclass", "exprfun", "withcontext", "genericfun", "genericclass", "tablerow", "embed", "coroutinescope", "launch", "async", "enum", "match", "matchvalue", "mapto", "safe", "nonnull", "resultfun", "resultmatch", "defer", "foreach", "sqlfetch",
   "sqlsingle", "sqliterator", "sqlinsertnothing", "sqlinsertupdate", "sqlupdatereturning"
 ]) {
   assert(prefixes.has(prefix), `snippets are missing prefix ${prefix}`);

tools/vscode-gotlin/snippets/gotlin.code-snippets

@@ -8,6 +8,16 @@
     ],
     "description": "Gotlin function"
   },
+  "Expression Function": {
+    "prefix": "exprfun",
+    "body": ["fun ${1:name}(${2}) = ${3:expression}"],
+    "description": "Gotlin expression-bodied function"
+  },
+  "With Go Context": {
+    "prefix": "withcontext",
+    "body": ["withContext(${1:request}.context()) {", "    $0", "}"],
+    "description": "Establish an ambient coroutine context from a Go context"
+  },
   "Main Function": {
     "prefix": "main",
     "body": [