Language: match expression (PHP 8)

[PurHur]

Problem

match ($x) { ... } is not compiled. Routers may use match for clean path dispatch.

Goal

match with literal/int/string arms and default arm (no guard expressions initially).

Tasks

• Lower to switch-like CFG or chained compare+jump
• VM + JIT (reuse switch work JIT: Implement switch/case opcodes (TYPE_CASE) — VM works, JIT stubbed #96)
• PHPT compliance

Acceptance

echo match (2) { 1 => 'a', 2 => 'b', default => 'c' }; // b