[morph.ai] Fixed PLAYGROUND-PR-3278 -- Add support for TypeScript generics with extends keyword

[MorphCodeBot]

Fixed issue where TypeScript generic types using the extends keyword broke syntax highlighting from version 10.3.0 onwards.

Changes

• Added new GENERIC_TYPE_PARAMETER mode to handle generic type parameters
• Integrated extends keyword support within generic type declarations
• Maintained proper highlighting for generic type constraints

Technical Details

• Created dedicated mode for generic type parameters
• Enhanced TypeScript grammar to properly handle extends clauses
• Integrated with existing TypeScript language definition
• Preserved compatibility with other TypeScript features

Example Fixed Code:

interface Prefixer<Something extends string> {
  (): `other__${Something}`;
}

Testing

• Verified fix with provided test cases
• Confirmed proper highlighting of extends keyword
• Tested compatibility with existing TypeScript syntax

Related Issues

• Fixes issue reported in Stack Overflow meta
• Resolves highlighting breaks in VSCode markdown preview

Additional ticket processing details