refactor: MIR instruction.rs 4-Phase大型リファクタリング完了（888→315行、64%削減）
Single Responsibility Principle適用による完全分離: - Phase 1: テスト分離 → instruction/tests.rs (196行) - Phase 2: Display実装分離 → instruction/display.rs (130行) - Phase 3: メソッド実装分離 → instruction/methods.rs (247行) - Phase 4: 統合テスト成功（全コンパイルエラー解決） 技術的成果: - MirInstruction enumを単一責任に集中 - 各実装が独立して保守可能な構造 - EffectMask::read→READ修正も完了 - ビルド成功確認済み（警告のみ） 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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Selfhosting Dev
205
src/boxes/basic/string_box.rs
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205
src/boxes/basic/string_box.rs
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//! StringBox - String values in Nyash
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//!
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//! Implements the core StringBox type with all string manipulation methods.
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use crate::box_trait::{NyashBox, BoxCore, BoxBase};
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use crate::boxes::ArrayBox;
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use std::any::Any;
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use std::fmt::{Debug, Display};
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/// String values in Nyash - UTF-8 strings with rich method support
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#[derive(Debug, Clone, PartialEq)]
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pub struct StringBox {
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pub value: String,
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base: BoxBase,
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}
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impl StringBox {
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pub fn new(value: impl Into<String>) -> Self {
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Self {
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value: value.into(),
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base: BoxBase::new(),
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}
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}
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pub fn empty() -> Self {
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Self::new("")
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}
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// ===== String Methods for Nyash =====
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/// Split string by delimiter and return ArrayBox
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pub fn split(&self, delimiter: &str) -> Box<dyn NyashBox> {
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let parts: Vec<String> = self.value.split(delimiter).map(|s| s.to_string()).collect();
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let array_elements: Vec<Box<dyn NyashBox>> = parts
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.into_iter()
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.map(|s| Box::new(StringBox::new(s)) as Box<dyn NyashBox>)
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.collect();
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Box::new(ArrayBox::new_with_elements(array_elements))
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}
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/// Find substring and return position (or -1 if not found)
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pub fn find(&self, search: &str) -> Box<dyn NyashBox> {
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use crate::box_trait::IntegerBox;
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match self.value.find(search) {
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Some(pos) => Box::new(IntegerBox::new(pos as i64)),
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None => Box::new(IntegerBox::new(-1)),
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}
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}
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/// Replace all occurrences of old with new
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pub fn replace(&self, old: &str, new: &str) -> Box<dyn NyashBox> {
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Box::new(StringBox::new(self.value.replace(old, new)))
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}
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/// Trim whitespace from both ends
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pub fn trim(&self) -> Box<dyn NyashBox> {
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Box::new(StringBox::new(self.value.trim()))
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}
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/// Convert to uppercase
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pub fn to_upper(&self) -> Box<dyn NyashBox> {
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Box::new(StringBox::new(self.value.to_uppercase()))
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}
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/// Convert to lowercase
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pub fn to_lower(&self) -> Box<dyn NyashBox> {
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Box::new(StringBox::new(self.value.to_lowercase()))
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}
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/// Check if string contains substring
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pub fn contains(&self, search: &str) -> Box<dyn NyashBox> {
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use crate::box_trait::BoolBox;
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Box::new(BoolBox::new(self.value.contains(search)))
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}
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/// Check if string starts with prefix
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pub fn starts_with(&self, prefix: &str) -> Box<dyn NyashBox> {
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use crate::box_trait::BoolBox;
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Box::new(BoolBox::new(self.value.starts_with(prefix)))
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}
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/// Check if string ends with suffix
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pub fn ends_with(&self, suffix: &str) -> Box<dyn NyashBox> {
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use crate::box_trait::BoolBox;
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Box::new(BoolBox::new(self.value.ends_with(suffix)))
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}
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/// Join array elements using this string as delimiter
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pub fn join(&self, array_box: Box<dyn NyashBox>) -> Box<dyn NyashBox> {
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if let Some(array) = array_box.as_any().downcast_ref::<ArrayBox>() {
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let strings: Vec<String> = array
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.items
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.read()
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.unwrap()
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.iter()
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.map(|element| element.to_string_box().value)
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.collect();
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Box::new(StringBox::new(strings.join(&self.value)))
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} else {
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// If not an ArrayBox, treat as single element
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Box::new(StringBox::new(array_box.to_string_box().value))
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}
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}
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/// Get string length
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///
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/// Env gate: NYASH_STR_CP=1 → count Unicode scalar values (chars),
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/// otherwise use UTF-8 byte length (legacy/default).
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pub fn length(&self) -> Box<dyn NyashBox> {
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use crate::box_trait::IntegerBox;
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let use_cp = std::env::var("NYASH_STR_CP").ok().as_deref() == Some("1");
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let n = if use_cp {
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self.value.chars().count() as i64
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} else {
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self.value.len() as i64
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};
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Box::new(IntegerBox::new(n))
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}
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/// Convert string to integer (parse as i64)
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pub fn to_integer(&self) -> Box<dyn NyashBox> {
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use crate::box_trait::IntegerBox;
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match self.value.trim().parse::<i64>() {
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Ok(n) => Box::new(IntegerBox::new(n)),
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Err(_) => {
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// If parsing fails, return 0 (JavaScript-like behavior)
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Box::new(IntegerBox::new(0))
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}
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}
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}
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/// Get character at index
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pub fn get(&self, index: usize) -> Option<Box<dyn NyashBox>> {
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if let Some(ch) = self.value.chars().nth(index) {
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Some(Box::new(StringBox::new(ch.to_string())))
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} else {
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None
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}
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}
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/// Get substring from start to end (exclusive)
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pub fn substring(&self, start: usize, end: usize) -> Box<dyn NyashBox> {
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let chars: Vec<char> = self.value.chars().collect();
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let actual_end = end.min(chars.len());
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let actual_start = start.min(actual_end);
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let substring: String = chars[actual_start..actual_end].iter().collect();
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Box::new(StringBox::new(substring))
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}
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}
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impl BoxCore for StringBox {
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fn box_id(&self) -> u64 {
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self.base.id
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}
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fn parent_type_id(&self) -> Option<std::any::TypeId> {
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self.base.parent_type_id
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}
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fn fmt_box(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, "{}", self.value)
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}
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fn as_any(&self) -> &dyn Any {
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self
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}
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fn as_any_mut(&mut self) -> &mut dyn Any {
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self
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}
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}
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impl NyashBox for StringBox {
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fn to_string_box(&self) -> StringBox {
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self.clone()
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}
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fn equals(&self, other: &dyn NyashBox) -> crate::box_trait::BoolBox {
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use crate::box_trait::BoolBox;
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if let Some(other_string) = other.as_any().downcast_ref::<StringBox>() {
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BoolBox::new(self.value == other_string.value)
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} else {
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BoolBox::new(false)
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}
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}
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fn type_name(&self) -> &'static str {
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"StringBox"
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}
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fn clone_box(&self) -> Box<dyn NyashBox> {
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Box::new(self.clone())
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}
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/// 仮実装: clone_boxと同じ（後で修正）
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fn share_box(&self) -> Box<dyn NyashBox> {
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self.clone_box()
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}
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}
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impl Display for StringBox {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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self.fmt_box(f)
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}
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}
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