fix getting type from initializer

Author: gabritto

src/compiler/checker.ts

@@ -45461,9 +45461,13 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             return symbol ? getDeclaredTypeOfSymbol(symbol) : errorType;
         }
 
+        if (isBindingElement(node)) {
+            return getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ true, CheckMode.Normal) || errorType;
+        }
+
         if (isDeclaration(node)) {
             // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-            const symbol = getSymbolOfDeclaration(node);
+            const symbol = getSymbolOfDeclaration(node) || getSymbolAtLocation(node);
             return symbol ? getTypeOfSymbol(symbol) : errorType;
         }
 

src/services/completions.ts

@@ -1099,7 +1099,7 @@ function getJSDocParamAnnotation(
         else {
             if (initializer) {
                 const inferredType = checker.getTypeAtLocation(initializer.parent);
-                if (!(inferredType.flags & TypeFlags.Any)) {
+                if (!(inferredType.flags & (TypeFlags.Any | TypeFlags.Void))) {
                     const sourceFile = initializer.getSourceFile();
                     const quotePreference = getQuotePreference(sourceFile, preferences);
                     const builderFlags = (quotePreference === QuotePreference.Single ? NodeBuilderFlags.UseSingleQuotesForStringLiteralType : NodeBuilderFlags.None);
@@ -1121,7 +1121,7 @@ function getJSDocParamAnnotation(
                     }
                 }
             }
-            if (isSnippet) {
+            if (isSnippet && type === "*") {
                 type = `\${${tabstopCounter!.tabstop++}:${type}}`;
             }
         }

tests/baselines/reference/jsdocParameterTagSnippetCompletion1.baseline

@@ -87,7 +87,7 @@
 // | virtual
 // | yields
 // | param {Object} param0 
-// | * @param {*} [param0.a=1] 
+// | * @param {number} [param0.a=1] 
 // | param {*} b 
 // | ----------------------------------------------------------------------
 //   */
@@ -8263,13 +8263,13 @@
           "documentation": []
         },
         {
-          "name": "param {Object} param0 \r\n* @param {*} [param0.a=1] ",
+          "name": "param {Object} param0 \r\n* @param {number} [param0.a=1] ",
           "kind": "",
           "sortText": "11",
           "kindModifiers": "",
           "displayParts": [
             {
-              "text": "param {Object} param0 \r\n* @param {*} [param0.a=1] ",
+              "text": "param {Object} param0 \r\n* @param {number} [param0.a=1] ",
               "kind": "text"
             }
           ],