f9d100ce01
Phase 25.1 完了成果: - ✅ LoopForm v2 テスト・ドキュメント・コメント完備 - 4ケース（A/B/C/D）完全テストカバレッジ - 最小再現ケース作成（SSAバグ調査用） - SSOT文書作成（loopform_ssot.md） - 全ソースに [LoopForm] コメントタグ追加 - ✅ Stage-1 CLI デバッグ環境構築 - stage1_cli.hako 実装 - stage1_bridge.rs ブリッジ実装 - デバッグツール作成（stage1_debug.sh/stage1_minimal.sh） - アーキテクチャ改善提案文書 - ✅ 環境変数削減計画策定 - 25変数の完全調査・分類 - 6段階削減ロードマップ（25→5、80%削減） - 即時削除可能変数特定（NYASH_CONFIG/NYASH_DEBUG） Phase 26-D からの累積変更: - PHI実装改善（ExitPhiBuilder/HeaderPhiBuilder等） - MIRビルダーリファクタリング - 型伝播・最適化パス改善 - その他約300ファイルの累積変更 🎯 技術的成果: - SSAバグ根本原因特定（条件分岐内loop変数変更） - Region+next_iパターン適用完了（UsingCollectorBox等） - LoopFormパターン文書化・テスト化完了 - セルフホスティング基盤強化 Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: ChatGPT <noreply@openai.com> Co-Authored-By: Task Assistant <task@anthropic.com>
64 lines
1.8 KiB
Rust
64 lines
1.8 KiB
Rust
//! Helper functions and type conversion utilities for Box operators
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//!
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//! This module contains utility functions used across the operator system,
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//! primarily for type conversion and validation.
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use crate::box_trait::{NyashBox, StringBox};
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/// Concatenate two boxes by converting both to strings
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///
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/// This function provides the fallback behavior for addition operations
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/// when type-specific arithmetic is not available - it converts both
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/// operands to strings and concatenates them.
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///
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/// # Arguments
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///
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/// * `left` - The left operand
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/// * `right` - The right operand
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///
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/// # Returns
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///
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/// A StringBox containing the concatenated string representation
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/// of both operands.
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///
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/// # Example
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///
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/// ```rust
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/// let left = IntegerBox::new(42);
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/// let right = BoolBox::new(true);
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/// let result = concat_result(&left, &right);
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/// // result will be StringBox("42true")
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/// ```
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#[inline]
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pub fn concat_result(left: &dyn NyashBox, right: &dyn NyashBox) -> Box<dyn NyashBox> {
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let l = left.to_string_box();
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let r = right.to_string_box();
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Box::new(StringBox::new(format!("{}{}", l.value, r.value)))
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}
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/// Check if a repetition count is within safe limits
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///
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/// This function validates that string repetition operations stay within
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/// reasonable bounds to prevent memory exhaustion attacks.
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///
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/// # Arguments
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///
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/// * `times` - The number of repetitions requested
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///
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/// # Returns
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///
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/// `true` if the repetition count is safe (0-10,000), `false` otherwise.
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///
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/// # Example
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///
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/// ```rust
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/// assert!(can_repeat(5)); // OK
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/// assert!(can_repeat(10000)); // OK (at limit)
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/// assert!(!can_repeat(10001)); // Too many
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/// assert!(!can_repeat(-1)); // Negative
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/// ```
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#[inline]
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pub fn can_repeat(times: i64) -> bool {
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(0..=10_000).contains(×)
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}
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