CommandLineOption type <-> defaultValueDescription

Author: jablko

src/compiler/commandLineParser.ts

@@ -2278,7 +2278,7 @@ namespace ts {
             return getCustomTypeMapOfCommandLineOption(optionDefinition.element);
         }
         else {
-            return (optionDefinition as CommandLineOptionOfCustomType).type;
+            return optionDefinition.type;
         }
     }
 

src/compiler/types.ts

@@ -6338,8 +6338,20 @@ namespace ts {
     }
 
     /* @internal */
-    export interface CommandLineOptionOfPrimitiveType extends CommandLineOptionBase {
-        type: "string" | "number" | "boolean";
+    export interface CommandLineOptionOfStringType extends CommandLineOptionBase {
+        type: "string";
+    }
+
+    /* @internal */
+    export interface CommandLineOptionOfNumberType extends CommandLineOptionBase {
+        type: "number";
+        defaultValueDescription?: `${number | undefined}` | DiagnosticMessage;
+    }
+
+    /* @internal */
+    export interface CommandLineOptionOfBooleanType extends CommandLineOptionBase {
+        type: "boolean";
+        defaultValueDescription?: `${boolean | undefined}` | DiagnosticMessage;
     }
 
     /* @internal */
@@ -6371,11 +6383,11 @@ namespace ts {
     /* @internal */
     export interface CommandLineOptionOfListType extends CommandLineOptionBase {
         type: "list";
-        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption;
+        element: CommandLineOptionOfCustomType | CommandLineOptionOfStringType | CommandLineOptionOfNumberType | CommandLineOptionOfBooleanType | TsConfigOnlyOption;
     }
 
     /* @internal */
-    export type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption | CommandLineOptionOfListType;
+    export type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfStringType | CommandLineOptionOfNumberType | CommandLineOptionOfBooleanType | TsConfigOnlyOption | CommandLineOptionOfListType;
 
     /* @internal */
     export const enum CharacterCodes {