[Enhancement] Improve Inline Object Type Literal Support

[yhk1038]

Summary

Currently, T-Ruby's inline object type literal ({ field: Type }) support is inconsistent across different contexts. This issue tracks the work to improve and unify this support.

Current Status

Context	Status	Example
Function parameters	✅ Supported	def foo(config: { host: String, port: Integer })
Interface members	✅ Supported	interface Config { settings: { debug: Boolean } }
Class fields	⚠️ Unverified	@info: { name: String, age: Integer }
Variable declarations	❌ Not supported	config: { host: String } = { ... }

Technical Details

Root Cause

The parse_typed_assignment() method in token_declaration_parser.rb:458 only accepts :constant tokens in the type position, preventing hash literal types from being parsed in variable declarations.

Affected Files

• lib/t_ruby/parser_combinator/token/token_declaration_parser.rb
• lib/t_ruby/ir.rb (HashLiteralType class at line 682)

Proposed Improvements

1. Variable Declarations: Extend parse_typed_assignment() to call parse_type() instead of only accepting :constant tokens
2. Class Fields: Add tests and documentation for @field: { ... } syntax
3. Documentation: Update docs to clarify where inline object type literals are supported

Related

• TypeScript equivalent: Object Type Literal / Anonymous Object Type
• IR class: TRuby::IR::HashLiteralType