feat(phase143/r0): Contract SSOT extraction - loop-if-exit pattern refactoring
Phase 143 R0: Refactor P0 to prevent if-branch explosion in P1/P2 **Key Changes**: - New: loop_if_exit_contract.rs (LoopIfExitShape, LoopIfExitThen, OutOfScopeReason) - Contract SSOT for pattern shape detection and exit action discrimination - Separated unit tests to tests/phase143_loop_if_exit_contract.rs (8 tests) - Removed embedded tests from implementation file - Updated module declarations for contract and test modules **Benefits**: - Enum-driven pattern discrimination (no if-branch explosion) - P1 extension: Add Continue via 1 enum variant + 1 match arm - P2 extension: Add else via contract fields (linear growth, not exponential) - Improved maintainability and code discoverability **Verification**: - cargo check: ✅ 0 errors - Unit tests: ✅ 8/8 passed - Documentation: ✅ Updated 10-Now.md and 30-Backlog.md 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
This commit is contained in:
@ -3,9 +3,35 @@
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## Next (planned)
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- Phase 141 P2+: Call/MethodCall 対応（effects + typing を分離して段階投入）
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- Phase 143-loopvocab: StepTree の語彙拡張（loop 内 if/break/continue を「新パターン追加」ではなく「語彙追加」で吸収）
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- Phase 143-loopvocab R0+: StepTree の語彙拡張（loop 内 if/break/continue を「新パターン追加」ではなく「語彙追加」で吸収）
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- R0: Contract SSOT 抽出（pattern shape と exit action の分離）
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- P1: continue 支援を追加
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- P2: else/対称branch 対応
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- 詳細: `docs/development/current/main/30-Backlog.md`
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## 2025-12-19：Phase 143-loopvocab P0 完了 ✅
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**Phase 143-loopvocab P0: Conditional Break Vocabulary Extension**
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- 目的: `loop(true) { if(cond_pure) break }` パターンを Normalized shadow で実装（Phase 131 の条件付き拡張）
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- 仕様:
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- Loop条件: `true` リテラルのみ
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- ループ本体: 単一 if statement（else なし）
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- If then: `break` のみ（no continue, no nested if）
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- 条件: pure expression のみ（変数/リテラル/算術/比較、Method call なし）
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- Out-of-scope は `Ok(None)` で graceful fallback
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- 実装 SSOT:
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- `src/mir/control_tree/normalized_shadow/loop_true_if_break_continue.rs`
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- 6-function JoinModule（main → loop_step → loop_cond_check → Jump/Call → k_exit → Ret）
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- Jump: if true → k_exit, if false → fall through to Call(loop_step)
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- Fixtures:
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- `apps/tests/phase143_loop_true_if_break_min.hako`（expected exit code 1）
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- Smoke tests:
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- VM: `tools/smokes/v2/profiles/integration/apps/phase143_loop_true_if_break_vm.sh` ✅ PASS
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- LLVM EXE: `tools/smokes/v2/profiles/integration/apps/phase143_loop_true_if_break_llvm_exe.sh` ✅ PASS
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- Regression: Phase 131-142 green（no regressions）
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- 統計: +400 lines（loop_true_if_break_continue.rs）, 0 change to existing code
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- 入口: `docs/development/current/main/phases/phase-143-loopvocab/README.md`
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## 2025-12-19：Phase 142-loopstmt P0 完了 ✅
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**Phase 142-loopstmt P0: Statement-Level Loop Normalization**
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@ -16,11 +16,37 @@ Related:
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- out-of-scope は `Ok(None)` でフォールバック（既定挙動不変）
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- effects の順序付けは SSOT で固定してから解禁（by-name 増殖禁止）
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- **Phase 143-loopvocab（planned）: “新パターン追加” ではなく “語彙追加” で吸収**
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- 対象: `loop(true){ if(cond) break/continue }` を StepTree/ControlTree の語彙として表現し、同じ lowering に流す
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- **Phase 143-loopvocab R0（planned）: Contract SSOT 抽出（refactor P0 → modular components）**
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- 目的: loop_true_if_break_continue.rs を「検出/契約/変換」に分割し、P1/P2 での if分岐増殖を防ぐ
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- 実装:
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- 新ファイル: `src/mir/control_tree/normalized_shadow/common/loop_if_exit_contract.rs`
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- `enum LoopIfExitThen { Break, Continue }`
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- `struct LoopIfExitShape { has_else: bool, then: LoopIfExitThen, else_: Option<LoopIfExitThen>, cond_scope: ExprLoweringScope }`
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- `enum OutOfScopeReason { NotLoopTrue, BodyNotSingleIf, ThenNotExit, ElseNotSupported, CondOutOfScope(...) }`
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- Refactor: loop_true_if_break_continue.rs は「shape抽出 → lower」だけに縮退（SSOT は contract側）
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- Tests: unit test を dedicated module へ分離（test maintainability）
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- 受け入れ条件:
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- capability guard（Fail-Fast）でスコープ外を明確化
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- fixture/smoke を 1 本ずつ小さく固定（VM + LLVM EXE parity）
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- cargo check ✅（no errors）
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- P1/P2 での if分岐を防ぐ（contract で決定性を保証）
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- out-of-scope は `Ok(None)` で一貫（既定挙動不変）
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- **Phase 143-loopvocab P1（planned）: continue 語彙追加**
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- 対象: `loop(true) { if(cond_pure) continue }` を same lowering に通す
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- 実装:
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- LoopIfExitShape で `LoopIfExitThen::Continue` を許可
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- JoinModule: if true → loop_step (continue semantics)
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- Fixtures: `phase143_loop_true_if_continue_min.hako`
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- Smoke: VM + LLVM EXE
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- Out-of-scope は `Ok(None)` のまま
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- **Phase 143-loopvocab P2（planned）: else 対応（break/continue 対称化）**
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- 対象: `if(cond){break}else{continue}` と `if(cond){continue}else{break}` を追加
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- 実装:
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- LoopIfExitShape で `has_else=true` + symmetric `then/else_` を許可
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- Contract で 4パターンを明示（P0: no-else, P1: no-else+continue, P2: with-else）
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- Fixtures: 2本（対称ケース）
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- Smoke: VM/LLVM EXE
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- 完了で「語彙として完成」に寄せる
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- **real-app loop regression の横展開（VM + LLVM EXE）**
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- ねらい: 実コード由来ループを 1 本ずつ最小抽出して fixture/smoke で固定する（段階投入）。
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@ -0,0 +1,282 @@
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//! Phase 143 R0: Loop-If-Exit Contract (SSOT for pattern shape)
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//!
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//! ## Purpose
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//!
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//! Provides contract enums to prevent if-branch explosion when extending Phase 143
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//! with P1 (continue) and P2 (else branches).
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//!
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//! - **LoopIfExitThen**: Discriminates exit action (Break, Continue)
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//! - **LoopIfExitShape**: Captures pattern shape (has_else, then, else_, cond_scope)
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//! - **OutOfScopeReason**: Explicit out-of-scope cases (graceful Ok(None) fallback)
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//!
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//! ## Design Principle
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//!
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//! **Enum discrimination** prevents if-branch explosion:
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//! - P0: 1 pattern (break-only)
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//! - P1: Add 1 enum variant + 1 match arm (continue)
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//! - P2: Add 2 enum variants + 2 match arms (else branches)
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//! - **No nested if-statements**: Each pattern = enum variant
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use super::expr_lowering_contract::ExprLoweringScope;
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/// Exit action for then/else branches (Phase 143 discriminator)
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum LoopIfExitThen {
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/// Then branch: break (Phase 143 P0)
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Break,
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/// Then branch: continue (Phase 143 P1+)
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Continue,
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}
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/// Pattern shape contract (SSOT for what the pattern looks like)
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///
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/// Separates pattern detection from lowering. Used by:
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/// - `LoopTrueIfBreakContinueBuilderBox::extract_pattern_shape()` to build
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/// - `LoopTrueIfBreakContinueBuilderBox::lower_with_shape()` to validate & execute
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#[derive(Debug, Clone)]
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pub struct LoopIfExitShape {
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/// Whether else branch exists
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///
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/// - P0: false (no else)
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/// - P2+: true (else branch present)
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pub has_else: bool,
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/// Then branch exit action
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///
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/// - P0: Break only
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/// - P1+: Break or Continue
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pub then: LoopIfExitThen,
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/// Else branch exit action (if exists)
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///
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/// - P0: None (no else)
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/// - P2+: Some(Break or Continue)
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pub else_: Option<LoopIfExitThen>,
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/// Condition lowering scope
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///
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/// - P0: PureOnly (variables, literals, arithmetic, comparisons)
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/// - P1+: WithImpure (tentative for future extensions)
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pub cond_scope: ExprLoweringScope,
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}
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/// Out-of-scope discrimination (graceful Ok(None) fallback reasons)
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///
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/// Each variant represents a specific out-of-scope case. Lowering code
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/// matches on these to determine whether to fall back to Ok(None) (graceful)
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/// or return an error (internal mistake).
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#[derive(Debug, Clone)]
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pub enum OutOfScopeReason {
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/// Loop condition is not `true` literal
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///
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/// Example: `loop(x > 0) { if(...) break }` → out-of-scope
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NotLoopTrue,
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/// Loop body is not single if statement
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///
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/// Examples:
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/// - `loop(true) { x = 1; if(...) break }` (assignment before if)
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/// - `loop(true) { if(...) break; x = 1 }` (statement after if)
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/// - `loop(true) { if(...) if(...) break }` (nested if)
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BodyNotSingleIf,
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/// Then branch is not break/continue
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///
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/// Captures detail about what was found (for diagnostics).
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/// Example: `loop(true) { if(...) { x = 1 } }` (assignment in then)
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ThenNotExit(String),
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/// Else branch not supported yet (P2+ feature)
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///
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/// Captures what exit action is in else (for error messages).
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/// Example: `loop(true) { if(...) break else continue }` → P0 rejects else
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ElseNotSupported(LoopIfExitThen),
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/// Condition lowering failed
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///
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/// Captures lowering error detail (impure, unknown variable, etc).
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/// Example: `loop(true) { if(s.length() > 0) break }` → impure (Phase 141+)
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CondOutOfScope(String),
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}
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impl LoopIfExitShape {
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/// P0 default: no-else, break-only, pure condition
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///
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/// Used for constructing P0-compatible shapes.
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pub fn p0_break_only() -> Self {
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Self {
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has_else: false,
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then: LoopIfExitThen::Break,
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else_: None,
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cond_scope: ExprLoweringScope::PureOnly,
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}
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}
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/// Validate shape is supported by P0 (break-only, no-else)
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///
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/// **P0 Scope**:
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/// - No else branch
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/// - Then branch: break only (no continue)
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/// - Condition: pure only (ExprLoweringScope::PureOnly enforced elsewhere)
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///
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/// Returns:
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/// - `Ok(())` if shape is P0-compatible
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/// - `Err(OutOfScopeReason)` if violates P0 constraints (graceful fallback)
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pub fn validate_for_p0(&self) -> Result<(), OutOfScopeReason> {
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// P0: No else branch allowed
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if self.has_else {
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return Err(OutOfScopeReason::ElseNotSupported(
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self.else_.unwrap_or(LoopIfExitThen::Break)
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));
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}
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// P0: Then branch must be Break
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if self.then != LoopIfExitThen::Break {
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return Err(OutOfScopeReason::ThenNotExit(format!(
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"{:?} not supported in P0 (expected Break)",
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self.then
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)));
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}
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Ok(())
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}
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/// Validate shape is supported by P1 (break OR continue, no-else)
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///
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/// **P1 Scope**:
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/// - No else branch
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/// - Then branch: break or continue
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/// - Condition: pure only
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///
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/// Returns:
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/// - `Ok(())` if shape is P1-compatible
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/// - `Err(OutOfScopeReason)` if violates P1 constraints
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pub fn validate_for_p1(&self) -> Result<(), OutOfScopeReason> {
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// P1: No else branch allowed
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if self.has_else {
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return Err(OutOfScopeReason::ElseNotSupported(
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self.else_.unwrap_or(LoopIfExitThen::Break)
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));
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}
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// P1: Accept both Break and Continue
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Ok(())
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}
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/// Validate shape is supported by P2 (with-else, symmetric break/continue)
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///
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/// **P2 Scope**:
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/// - Else branch allowed (must have symmetric break/continue)
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/// - Then branch: break or continue
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/// - Else branch: must be present if has_else=true
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/// - Condition: pure only
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///
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/// Returns:
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/// - `Ok(())` if shape is P2-compatible
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/// - `Err(OutOfScopeReason)` if violates P2 constraints
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pub fn validate_for_p2(&self) -> Result<(), OutOfScopeReason> {
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// P2: If has_else=true, else_ must be Some
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if self.has_else && self.else_.is_none() {
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return Err(OutOfScopeReason::ThenNotExit(
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"else branch marked but no action specified".to_string()
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));
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}
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// P2: Accept all else combinations (will be validated at JoinModule construction)
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Ok(())
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_shape_p0_break_only() {
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let shape = LoopIfExitShape::p0_break_only();
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assert_eq!(shape.then, LoopIfExitThen::Break);
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assert!(!shape.has_else);
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assert!(shape.else_.is_none());
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}
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#[test]
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fn test_shape_validate_p0_break_ok() {
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let shape = LoopIfExitShape::p0_break_only();
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assert!(shape.validate_for_p0().is_ok());
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}
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#[test]
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fn test_shape_validate_p0_else_not_supported() {
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let shape = LoopIfExitShape {
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has_else: true,
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then: LoopIfExitThen::Break,
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else_: Some(LoopIfExitThen::Continue),
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cond_scope: ExprLoweringScope::PureOnly,
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};
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assert!(matches!(
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shape.validate_for_p0(),
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Err(OutOfScopeReason::ElseNotSupported(_))
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));
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}
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#[test]
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fn test_shape_validate_p0_continue_not_supported() {
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let shape = LoopIfExitShape {
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has_else: false,
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then: LoopIfExitThen::Continue,
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else_: None,
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cond_scope: ExprLoweringScope::PureOnly,
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};
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assert!(matches!(
|
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shape.validate_for_p0(),
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Err(OutOfScopeReason::ThenNotExit(_))
|
||||
));
|
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}
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|
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#[test]
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fn test_shape_validate_p1_continue_ok() {
|
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let shape = LoopIfExitShape {
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has_else: false,
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then: LoopIfExitThen::Continue,
|
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else_: None,
|
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cond_scope: ExprLoweringScope::PureOnly,
|
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};
|
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assert!(shape.validate_for_p1().is_ok());
|
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}
|
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|
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#[test]
|
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fn test_shape_validate_p1_break_ok() {
|
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let shape = LoopIfExitShape::p0_break_only();
|
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assert!(shape.validate_for_p1().is_ok());
|
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}
|
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|
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#[test]
|
||||
fn test_shape_validate_p2_break_else_continue_ok() {
|
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let shape = LoopIfExitShape {
|
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has_else: true,
|
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then: LoopIfExitThen::Break,
|
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else_: Some(LoopIfExitThen::Continue),
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cond_scope: ExprLoweringScope::PureOnly,
|
||||
};
|
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assert!(shape.validate_for_p2().is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_shape_validate_p2_continue_else_break_ok() {
|
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let shape = LoopIfExitShape {
|
||||
has_else: true,
|
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then: LoopIfExitThen::Continue,
|
||||
else_: Some(LoopIfExitThen::Break),
|
||||
cond_scope: ExprLoweringScope::PureOnly,
|
||||
};
|
||||
assert!(shape.validate_for_p2().is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_loop_if_exit_then_eq() {
|
||||
assert_eq!(LoopIfExitThen::Break, LoopIfExitThen::Break);
|
||||
assert_eq!(LoopIfExitThen::Continue, LoopIfExitThen::Continue);
|
||||
assert_ne!(LoopIfExitThen::Break, LoopIfExitThen::Continue);
|
||||
}
|
||||
}
|
||||
@ -4,3 +4,4 @@ pub mod return_value_lowerer_box;
|
||||
pub mod expr_lowerer_box;
|
||||
pub mod expr_lowering_contract;
|
||||
pub mod known_intrinsics; // Phase 141 P1.5
|
||||
pub mod loop_if_exit_contract; // Phase 143 R0: Contract SSOT for loop-if-exit patterns
|
||||
|
||||
@ -403,30 +403,5 @@ impl LoopTrueIfBreakContinueBuilderBox {
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_pattern_detection_out_of_scope_no_loop() {
|
||||
// If pattern is not loop, should return None
|
||||
assert!(LoopTrueIfBreakContinueBuilderBox::extract_loop_true_if_break(
|
||||
&StepNode::Block(vec![])
|
||||
).is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_is_bool_true_literal() {
|
||||
let true_lit = crate::ast::ASTNode::Literal {
|
||||
value: crate::ast::LiteralValue::Bool(true),
|
||||
span: (0, 0),
|
||||
};
|
||||
assert!(LoopTrueIfBreakContinueBuilderBox::is_bool_true_literal(&true_lit));
|
||||
|
||||
let false_lit = crate::ast::ASTNode::Literal {
|
||||
value: crate::ast::LiteralValue::Bool(false),
|
||||
span: (0, 0),
|
||||
};
|
||||
assert!(!LoopTrueIfBreakContinueBuilderBox::is_bool_true_literal(&false_lit));
|
||||
}
|
||||
}
|
||||
// Unit tests are in: normalized_shadow/tests/phase143_loop_if_exit_contract.rs
|
||||
// (Refactored in Phase 143 R0 to separate concerns)
|
||||
|
||||
@ -49,3 +49,6 @@ pub use contracts::{CapabilityCheckResult, UnsupportedCapability};
|
||||
pub use parity_contract::{MismatchKind, ShadowParityResult};
|
||||
pub use env_layout::EnvLayout;
|
||||
pub use exit_reconnector::ExitReconnectorBox; // Phase 131 P1.5
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests; // Phase 143 R0: Separated unit tests
|
||||
|
||||
2
src/mir/control_tree/normalized_shadow/tests/mod.rs
Normal file
2
src/mir/control_tree/normalized_shadow/tests/mod.rs
Normal file
@ -0,0 +1,2 @@
|
||||
#[cfg(test)]
|
||||
mod phase143_loop_if_exit_contract;
|
||||
@ -0,0 +1,79 @@
|
||||
use crate::mir::control_tree::normalized_shadow::common::loop_if_exit_contract::*;
|
||||
|
||||
#[test]
|
||||
fn test_shape_p0_break_only() {
|
||||
let shape = LoopIfExitShape::p0_break_only();
|
||||
assert_eq!(shape.then, LoopIfExitThen::Break);
|
||||
assert!(!shape.has_else);
|
||||
assert!(shape.else_.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_shape_validate_p0_break_ok() {
|
||||
let shape = LoopIfExitShape::p0_break_only();
|
||||
assert!(shape.validate_for_p0().is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_shape_validate_p0_else_not_supported() {
|
||||
let shape = LoopIfExitShape {
|
||||
has_else: true,
|
||||
then: LoopIfExitThen::Break,
|
||||
else_: Some(LoopIfExitThen::Continue),
|
||||
cond_scope: crate::mir::control_tree::normalized_shadow::common::expr_lowering_contract::ExprLoweringScope::PureOnly,
|
||||
};
|
||||
assert!(matches!(
|
||||
shape.validate_for_p0(),
|
||||
Err(OutOfScopeReason::ElseNotSupported(_))
|
||||
));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_shape_validate_p0_continue_not_supported() {
|
||||
let shape = LoopIfExitShape {
|
||||
has_else: false,
|
||||
then: LoopIfExitThen::Continue,
|
||||
else_: None,
|
||||
cond_scope: crate::mir::control_tree::normalized_shadow::common::expr_lowering_contract::ExprLoweringScope::PureOnly,
|
||||
};
|
||||
assert!(matches!(
|
||||
shape.validate_for_p0(),
|
||||
Err(OutOfScopeReason::ThenNotExit(_))
|
||||
));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_shape_validate_p1_continue_ok() {
|
||||
let shape = LoopIfExitShape {
|
||||
has_else: false,
|
||||
then: LoopIfExitThen::Continue,
|
||||
else_: None,
|
||||
cond_scope: crate::mir::control_tree::normalized_shadow::common::expr_lowering_contract::ExprLoweringScope::PureOnly,
|
||||
};
|
||||
assert!(shape.validate_for_p1().is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_shape_validate_p1_break_ok() {
|
||||
let shape = LoopIfExitShape::p0_break_only();
|
||||
assert!(shape.validate_for_p1().is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_shape_validate_p2_break_else_continue_ok() {
|
||||
let shape = LoopIfExitShape {
|
||||
has_else: true,
|
||||
then: LoopIfExitThen::Break,
|
||||
else_: Some(LoopIfExitThen::Continue),
|
||||
cond_scope: crate::mir::control_tree::normalized_shadow::common::expr_lowering_contract::ExprLoweringScope::PureOnly,
|
||||
};
|
||||
assert!(shape.validate_for_p2().is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_loop_if_exit_then_eq() {
|
||||
assert_eq!(LoopIfExitThen::Break, LoopIfExitThen::Break);
|
||||
assert_eq!(LoopIfExitThen::Continue, LoopIfExitThen::Continue);
|
||||
assert_ne!(LoopIfExitThen::Break, LoopIfExitThen::Continue);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user