Rex v0.3.0

Rex v0.3.0

This release expands the Rex language with a set of practical syntax and
compiler improvements focused on clearer code, less repetition, and better
support for common day-to-day patterns.

What's New

• Added compound assignment operators:
  +=, -=, *=, /=, %=
• Added compound assignment for indexed values such as:
  v[0] += 1
• Added nested member assignment support such as:
  o.inner.value = 99
  and
  o.inner.value += 1
• Added struct literals with named fields:
  Vec2 { x: 3.0, y: 4.0 }
• Added wildcard match arms using:
  _ => ...
• Added multi-tag match arms such as:
  A | B => ...

Compiler and Typechecker Improvements

• Updated the parser, code generator, and typechecker to fully support the new syntax.
• Struct literal validation is now stricter:
  unknown fields are rejected, duplicate fields are rejected, missing fields are
  reported, and field types are checked.
• Improved mutability and ownership checks for nested assignment paths.
• Improved method dispatch for nested member chains such as:
  o.inner.get()

New Examples

• rex/examples/test_compound_assign.rex
• rex/examples/test_multi_match.rex
• rex/examples/test_nested_assign.rex
• rex/examples/test_struct_lit.rex
• rex/examples/test_wildcard_match.rex