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hakorune/docs/development/current
nyash-codex 3127ebb73d feat(mir): Phase 136 Step 3/7 - ScopeContext extraction
## Summary
Extract scope and control flow management into ScopeContext for better organization.

## Changes
- **New file**: src/mir/builder/scope_context.rs (264 lines)
  - Lexical scope stack management
  - Control flow stacks (loop/if)
  - Function context tracking
  - Debug scope helpers
- **Updated**: src/mir/builder.rs
  - Add scope_ctx field
  - Mark legacy fields as deprecated
  - Add sync helpers (sync_scope_ctx_to_legacy, sync_legacy_to_scope_ctx)
- **Updated**: src/mir/builder/vars/lexical_scope.rs
  - Use scope_ctx as SSOT
  - Sync to legacy fields for backward compat
- **Updated**: src/mir/builder/lifecycle.rs
  - Sync current_function via scope_ctx
- **Updated**: src/mir/builder/calls/lowering.rs
  - Sync function context in lowering flow

## Extracted Fields (7)
1. lexical_scope_stack - Block-scoped locals
2. loop_header_stack - Loop headers for break/continue
3. loop_exit_stack - Loop exit blocks
4. if_merge_stack - If merge blocks
5. current_function - Currently building function
6. function_param_names - Function parameters (for LoopForm)
7. debug_scope_stack - Debug region identifiers

## Test Results
-  cargo build --release (291 warnings - deprecated usage)
-  cargo test --release --lib - 1005/1009 PASS
-  phase135_trim_mir_verify.sh - PASS
- ⚠️ phase132_exit_phi_parity.sh - Error (pre-existing issue)

## Progress
Phase 136: 3/7 Contexts complete (TypeContext, CoreContext, ScopeContext)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2025-12-15 20:28:21 +09:00
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