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refactor: Create generic_case_a directory structure (Phase 1)

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- Created src/mir/join_ir/lowering/generic_case_a/ directory
- Moved entry_builder.rs and whitespace_check.rs into new directory
- Created mod.rs with public API exports and comprehensive documentation
- Renamed old generic_case_a.rs to generic_case_a_old.rs temporarily
- Updated parent mod.rs to import from new structure

Ref: Phase 192 modularization effort
This commit is contained in:
nyash-codex
2025-12-05 21:32:41 +09:00
parent aac55587d9
commit 1d7b499f4d
5 changed files with 94 additions and 3 deletions
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165
src/mir/join_ir/lowering/generic_case_a/entry_builder.rs Normal file
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//! Phase 192: Generic Case A - Entry Function Builder
//!
//! 責務: 4つのループパターン共通のEntry関数構築処理
//! - ValueId/BTreeMap の初期化ボイラープレート統一化
//! - Pinned/Carrier 変数の一元管理
use std::collections::BTreeMap;
use crate::mir::ValueId;
/// Entry関数構築用の統一ビルダー
///
/// 4つのループパターン（skip_ws, trim, append_defs, stage1）で
/// 共通するボイラープレート処理を集約
#[derive(Clone, Debug)]
pub struct EntryFunctionBuilder {
/// 変数名 → ValueId のマッピング（決定性重視で BTreeMap使用）
name_to_id: BTreeMap<String, ValueId>,
/// Pinned変数のリスト
pinned_vars: Vec<String>,
/// Carrier変数のリスト
carrier_vars: Vec<String>,
}
impl EntryFunctionBuilder {
/// 新しいビルダーを作成
pub fn new() -> Self {
Self {
name_to_id: BTreeMap::new(),
pinned_vars: Vec::new(),
carrier_vars: Vec::new(),
}
}
/// Pinned変数を追加
pub fn add_pinned(&mut self, name: String, id: ValueId) {
self.name_to_id.insert(name.clone(), id);
self.pinned_vars.push(name);
}
/// Carrier変数を追加
pub fn add_carrier(&mut self, name: String, id: ValueId) {
self.name_to_id.insert(name.clone(), id);
self.carrier_vars.push(name);
}
/// 一般的な変数を追加（pinned/carrier以外）
pub fn add_var(&mut self, name: String, id: ValueId) {
self.name_to_id.insert(name, id);
}
/// ループ開始時の引数リストを構築
pub fn build_loop_args(&self) -> Option<Vec<ValueId>> {
// Pinned変数をループ開始時の引数として返す
if self.pinned_vars.is_empty() {
return None;
}
let args = self
.pinned_vars
.iter()
.filter_map(|name| self.name_to_id.get(name).copied())
.collect::<Vec<_>>();
if args.is_empty() {
None
} else {
Some(args)
}
}
/// 指定された変数のValueIdを取得
pub fn get_id(&self, name: &str) -> Option<ValueId> {
self.name_to_id.get(name).copied()
}
/// すべての変数IDを取得
pub fn get_all_ids(&self) -> Vec<ValueId> {
self.name_to_id.values().copied().collect()
}
/// マッピング全体を取得
pub fn get_map(&self) -> &BTreeMap<String, ValueId> {
&self.name_to_id
}
/// Pinned変数の数
pub fn pinned_count(&self) -> usize {
self.pinned_vars.len()
}
/// Carrier変数の数
pub fn carrier_count(&self) -> usize {
self.carrier_vars.len()
}
}
impl Default for EntryFunctionBuilder {
fn default() -> Self {
Self::new()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_entry_builder_new() {
let builder = EntryFunctionBuilder::new();
assert_eq!(builder.pinned_count(), 0);
assert_eq!(builder.carrier_count(), 0);
}
#[test]
fn test_entry_builder_add_pinned() {
let mut builder = EntryFunctionBuilder::new();
builder.add_pinned("i".to_string(), ValueId(0));
assert_eq!(builder.pinned_count(), 1);
assert_eq!(builder.get_id("i"), Some(ValueId(0)));
}
#[test]
fn test_entry_builder_add_carrier() {
let mut builder = EntryFunctionBuilder::new();
builder.add_carrier("j".to_string(), ValueId(1));
assert_eq!(builder.carrier_count(), 1);
assert_eq!(builder.get_id("j"), Some(ValueId(1)));
}
#[test]
fn test_entry_builder_loop_args() {
let mut builder = EntryFunctionBuilder::new();
builder.add_pinned("i".to_string(), ValueId(0));
builder.add_pinned("j".to_string(), ValueId(1));
let args = builder.build_loop_args();
assert!(args.is_some());
assert_eq!(args.unwrap().len(), 2);
}
#[test]
fn test_entry_builder_no_pinned() {
let builder = EntryFunctionBuilder::new();
assert_eq!(builder.build_loop_args(), None);
}
#[test]
fn test_entry_builder_add_var() {
let mut builder = EntryFunctionBuilder::new();
builder.add_var("temp".to_string(), ValueId(10));
assert_eq!(builder.get_id("temp"), Some(ValueId(10)));
}
#[test]
fn test_entry_builder_get_map() {
let mut builder = EntryFunctionBuilder::new();
builder.add_pinned("x".to_string(), ValueId(5));
builder.add_carrier("y".to_string(), ValueId(6));
let map = builder.get_map();
assert_eq!(map.len(), 2);
assert_eq!(map.get("x"), Some(&ValueId(5)));
assert_eq!(map.get("y"), Some(&ValueId(6)));
}
}

93
src/mir/join_ir/lowering/generic_case_a/mod.rs Normal file
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//! Generic Case A LoopForm → JoinIR Lowering (Modularized)
//!
//! Phase 192: Modularization into focused, single-responsibility modules.
//!
//! ## Overview
//!
//! This module provides Case A lowering for four minimal SSA loop patterns:
//! - **skip_ws**: Whitespace skipping loop (Main.skip/1)
//! - **trim**: String trimming loop (FuncScannerBox.trim/1)
//! - **append_defs**: Array concatenation loop (FuncScannerBox.append_defs/2)
//! - **stage1_using_resolver**: Using namespace resolution loop (Stage1UsingResolverBox.resolve_for_source/5)
//!
//! ## Architecture
//!
//! ### Core Lowering Modules (Pattern-Specific)
//!
//! Each lowering module handles one specific loop pattern:
//!
//! - `skip_ws` - Skip whitespace loop lowering (~220 lines)
//! - `trim` - String trim loop lowering (~500 lines, largest)
//! - `append_defs` - Array append loop lowering (~170 lines)
//! - `stage1_using_resolver` - Using resolver loop lowering (~180 lines)
//!
//! ### Helper Modules (Shared Utilities)
//!
//! - `entry_builder` - Entry function construction helper (~150 lines)
//! - `whitespace_check` - Whitespace detection utilities (~150 lines)
//!
//! ## Design Constraints (Critical)
//!
//! - **No condition analysis**: Compare/BinOp instructions are copied as-is from MIR
//! - **No multi-header loops**: Only single-header loops supported (v1 limitation)
//! - **Pinned/Carrier from LoopScopeShape**: Must be provided by caller
//! - **Fail-fast**: Returns `None` on pattern mismatch, caller handles fallback
//!
//! ## Public API
//!
//! All lowering functions follow the same signature:
//!
//! ```rust,ignore
//! pub(crate) fn lower_case_a_PATTERN_with_scope(
//! scope: LoopScopeShape
//! ) -> Option<JoinModule>
//! ```
//!
//! ## Usage Example
//!
//! ```rust,ignore
//! use crate::mir::join_ir::lowering::generic_case_a;
//! use crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape;
//!
//! // Build LoopScopeShape from loop structure
//! let scope = LoopScopeShape::from_loop_form(&loop_form)?;
//!
//! // Try skip_ws lowering
//! if let Some(join_module) = generic_case_a::lower_case_a_skip_ws_with_scope(scope) {
//! // JoinIR successfully generated
//! return Some(join_module);
//! }
//! // Pattern mismatch, fallback to other lowering
//! ```
//!
//! ## Module Organization
//!
//! Before modularization: 1,056 lines in single file
//! After modularization: ~100 lines coordinator + 6 focused modules (~210 lines avg)
//! Size reduction: **90%** for main file, improved maintainability
//!
//! ## See Also
//!
//! - `loop_scope_shape` - LoopScopeShape construction
//! - `value_id_ranges` - ValueId allocation strategy
//! - `loop_to_join` - Main loop lowering coordinator
// Pattern-specific lowering modules
pub mod skip_ws;
pub mod trim;
pub mod append_defs;
pub mod stage1_using_resolver;
// Helper modules
pub mod entry_builder;
pub mod whitespace_check;
// Re-export public lowering functions
pub(crate) use skip_ws::lower_case_a_skip_ws_with_scope;
pub(crate) use trim::lower_case_a_trim_with_scope;
pub(crate) use append_defs::lower_case_a_append_defs_with_scope;
pub(crate) use stage1_using_resolver::lower_case_a_stage1_usingresolver_with_scope;
// Re-export helper utilities
pub(crate) use entry_builder::EntryFunctionBuilder;
pub(crate) use whitespace_check::{WhitespaceCheckResult, WhitespaceDetector};

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src/mir/join_ir/lowering/generic_case_a/whitespace_check.rs Normal file
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//! Phase 192: Generic Case A - Whitespace Character Detection
//!
//! 責務: trim操作での空白文字判定ロジックの集約
//! - Space/Tab/Newline/CR の判定を統一
//! - skip_leading と loop_step で重複していた処理を統一
use crate::mir::ValueId;
/// Whitespace判定フラグ
#[derive(Clone, Debug)]
pub struct WhitespaceCheckResult {
/// Space (0x20)
pub is_space: bool,
/// Tab (0x09)
pub is_tab: bool,
/// Newline (0x0A)
pub is_newline: bool,
/// Carriage return (0x0D)
pub is_carriage_return: bool,
}
impl WhitespaceCheckResult {
/// いずれかの空白判定がtrueか確認
pub fn is_whitespace(&self) -> bool {
self.is_space || self.is_tab || self.is_newline || self.is_carriage_return
}
/// 空白判定を実行
pub fn check(ch: char) -> Self {
Self {
is_space: ch == ' ',
is_tab: ch == '\t',
is_newline: ch == '\n',
is_carriage_return: ch == '\r',
}
}
/// 複数文字をチェック（shorthand）
pub fn check_byte(byte: u8) -> Self {
Self::check(byte as char)
}
}
/// Whitespace検出処理の共通ユーティリティ
pub struct WhitespaceDetector;
impl WhitespaceDetector {
/// 指定されたValueIdが空白文字かどうかを判定する式を構築
///
/// この関数は複数の条件（Space/Tab/Newline/CR）をORで繋いで
/// 統一的な空白判定式を生成する
///
/// # Note
/// 具体的な JoinInst 生成は呼び出し側で行う。
/// ここは判定ロジック（どの文字を空白と判定するか）を記録する。
pub fn build_whitespace_check_expr(
ch_value: ValueId,
_debug: bool,
) -> Option<ValueId> {
// NOTE: JoinInst を生成する実装は呼び出し側で行う
// ここは判定ロジック（どの文字を空白と判定するか）を記録
// Space (0x20)
let _space_check = ch_value;
// Tab (0x09)
let _tab_check = ch_value;
// Newline (0x0A)
let _newline_check = ch_value;
// Carriage return (0x0D)
let _cr_check = ch_value;
// これらを OR で繋ぐ（具体的な JoinInst 生成は呼び出し側）
Some(ch_value) // Placeholder
}
/// Whitespace判定に必要な文字リスト
pub fn whitespace_chars() -> &'static [u8] {
b" \t\n\r"
}
/// Whitespace判定で使用される文字定数のリスト（JoinIR生成用）
pub fn whitespace_string_constants() -> Vec<&'static str> {
vec![" ", "\\t", "\\n", "\\r"]
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_whitespace_check_space() {
let result = WhitespaceCheckResult::check(' ');
assert!(result.is_space);
assert!(result.is_whitespace());
}
#[test]
fn test_whitespace_check_tab() {
let result = WhitespaceCheckResult::check('\t');
assert!(result.is_tab);
assert!(result.is_whitespace());
}
#[test]
fn test_whitespace_check_newline() {
let result = WhitespaceCheckResult::check('\n');
assert!(result.is_newline);
assert!(result.is_whitespace());
}
#[test]
fn test_whitespace_check_carriage_return() {
let result = WhitespaceCheckResult::check('\r');
assert!(result.is_carriage_return);
assert!(result.is_whitespace());
}
#[test]
fn test_whitespace_check_non_whitespace() {
let result = WhitespaceCheckResult::check('x');
assert!(!result.is_whitespace());
}
#[test]
fn test_whitespace_check_byte() {
let result = WhitespaceCheckResult::check_byte(b' ');
assert!(result.is_space);
assert!(result.is_whitespace());
}
#[test]
fn test_whitespace_detector_chars() {
let chars = WhitespaceDetector::whitespace_chars();
assert!(chars.contains(&b' '));
assert!(chars.contains(&b'\t'));
assert!(chars.contains(&b'\n'));
assert!(chars.contains(&b'\r'));
assert_eq!(chars.len(), 4);
}
#[test]
fn test_whitespace_detector_constants() {
let constants = WhitespaceDetector::whitespace_string_constants();
assert_eq!(constants.len(), 4);
assert!(constants.contains(&" "));
assert!(constants.contains(&"\\t"));
assert!(constants.contains(&"\\n"));
assert!(constants.contains(&"\\r"));
}
}