Allow wCodegenDecl on lambdas (#8892)

compiler/pragmas.nim

@@ -53,7 +53,7 @@ const
   lambdaPragmas* = {FirstCallConv..LastCallConv, wImportc, wExportc, wNodecl,
     wNosideeffect, wSideeffect, wNoreturn, wDynlib, wHeader,
     wDeprecated, wExtern, wThread, wImportCpp, wImportObjC, wAsmNoStackFrame,
-    wRaises, wLocks, wTags, wGcSafe}
+    wRaises, wLocks, wTags, wGcSafe, wCodegenDecl}
   typePragmas* = {wImportc, wExportc, wDeprecated, wMagic, wAcyclic, wNodecl,
     wPure, wHeader, wCompilerProc, wCore, wFinal, wSize, wExtern, wShallow,
     wImportCpp, wImportObjC, wError, wIncompleteStruct, wByCopy, wByRef,

tests/ccgbugs/tcodegendecllambda.nim

@@ -0,0 +1,13 @@
+discard """
+  targets: "c cpp js"
+  ccodecheck: "'HELLO'"
+"""
+
+when defined(JS):
+  var foo = proc(): void{.codegenDecl: "/*HELLO*/function $2($3)".} =
+    echo "baa"
+else:
+  var foo = proc(): void{.codegenDecl: "/*HELLO*/$1 $2 $3".} =
+    echo "baa"
+
+foo()