104 lines
2.6 KiB
Rust
104 lines
2.6 KiB
Rust
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/*!
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* Exception Boxes for Nyash try/catch/throw system
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*
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* Everything is Box哲学に基づく例外システム
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*/
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use crate::box_trait::{NyashBox, StringBox, BoolBox};
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use std::any::Any;
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use std::collections::HashMap;
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/// 基底例外Box
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#[derive(Debug, Clone)]
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pub struct ErrorBox {
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pub message: String,
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pub stack_trace: Vec<String>,
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pub cause: Option<Box<ErrorBox>>,
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id: u64,
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}
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impl ErrorBox {
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pub fn new(message: &str) -> Self {
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static mut COUNTER: u64 = 0;
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let id = unsafe {
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COUNTER += 1;
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COUNTER
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};
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Self {
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message: message.to_string(),
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stack_trace: Vec::new(),
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cause: None,
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id,
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}
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}
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pub fn with_cause(message: &str, cause: ErrorBox) -> Self {
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static mut COUNTER: u64 = 0;
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let id = unsafe {
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COUNTER += 1;
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COUNTER
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};
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Self {
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message: message.to_string(),
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stack_trace: Vec::new(),
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cause: Some(Box::new(cause)),
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id,
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}
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}
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pub fn add_stack_frame(&mut self, frame: String) {
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self.stack_trace.push(frame);
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}
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pub fn get_full_message(&self) -> String {
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let mut msg = self.message.clone();
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if let Some(ref cause) = self.cause {
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msg.push_str(&format!("\nCaused by: {}", cause.get_full_message()));
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}
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msg
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}
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}
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impl NyashBox for ErrorBox {
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fn type_name(&self) -> &'static str {
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"ErrorBox"
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}
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fn to_string_box(&self) -> StringBox {
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StringBox::new(format!("ErrorBox({})", self.message))
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}
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fn box_id(&self) -> u64 {
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self.id
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}
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fn equals(&self, other: &dyn NyashBox) -> BoolBox {
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if let Some(other_error) = other.as_any().downcast_ref::<ErrorBox>() {
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BoolBox::new(self.message == other_error.message)
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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 clone_box(&self) -> Box<dyn NyashBox> {
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Box::new(self.clone())
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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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}
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/// 例外タイプの判定ユーティリティ
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pub fn is_exception_type(exception: &dyn NyashBox, type_name: &str) -> bool {
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match type_name {
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"Error" | "ErrorBox" => exception.as_any().downcast_ref::<ErrorBox>().is_some(),
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_ => false,
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}
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}
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/// 例外の作成ヘルパー
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pub fn create_exception(_type_name: &str, message: &str, _extra_info: &HashMap<String, String>) -> Box<dyn NyashBox> {
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// 現在はErrorBoxのみサポート（シンプル実装）
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Box::new(ErrorBox::new(message))
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}
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