Module error 

Advanced error handling and recovery system for SciRS2

This module provides a comprehensive error handling framework including:

• Core error types and context management
• Advanced recovery strategies with retry mechanisms
• Circuit breaker patterns for fault tolerance
• Async error handling with timeout and progress tracking
• Comprehensive error diagnostics and pattern analysis
• Environment-aware error analysis and suggestions

Quick Start

use scirs2_core::error::{CoreError, CoreResult, RecoverableError};
use scirs2_core::error_context;

fn example_operation() -> CoreResult<i32> {
    // Basic error with context
    if false {
        return Err(CoreError::ComputationError(
            error_context!("Operation failed")
        ));
    }
     
    Ok(42)
}

// Enhanced error with recovery suggestions
let error = CoreError::MemoryError(error_context!("Out of memory"));
let recoverable = RecoverableError::error(error);
println!("{}", recoverable.recovery_report());

Advanced Features

Retry Mechanisms

use scirs2_core::error::recovery::{RetryExecutor, RecoveryStrategy};
use std::time::Duration;

let executor = RetryExecutor::new(RecoveryStrategy::ExponentialBackoff {
    max_attempts: 3,
    initialdelay: Duration::from_millis(100),
    maxdelay: Duration::from_secs(5),
    multiplier: 2.0,
});

let result = executor.execute(|| {
    // Your operation here
    Ok(42)
});

Circuit Breaker Pattern

use scirs2_core::error::recovery::CircuitBreaker;
use std::time::Duration;

let circuitbreaker = CircuitBreaker::new(
    5, // failure threshold
    Duration::from_secs(30), // timeout
    Duration::from_secs(60), // recovery timeout
);

let result = circuitbreaker.execute(|| {
    // Your operation here
    Ok(42)
});

Async Error Handling

use scirs2_core::error::recovery::{RecoveryStrategy, RetryExecutor};
use std::time::Duration;

// Synchronous retry example
let executor = RetryExecutor::new(
    RecoveryStrategy::LinearBackoff {
        max_attempts: 3,
        delay: Duration::from_millis(100),
    }
);

let mut counter = 0;
let retry_result = executor.execute(|| {
    counter += 1;
    if counter < 3 {
        Err(scirs2_core::error::CoreError::ComputationError(
            scirs2_core::error::ErrorContext::new("Temporary failure".to_string())
        ))
    } else {
        Ok::<i32, scirs2_core::error::CoreError>(123)
    }
});
assert!(retry_result.is_ok());

Error Diagnostics

use scirs2_core::error::diagnostics::error;
use scirs2_core::error::{CoreError, ErrorContext, ErrorLocation};

let err = CoreError::ConvergenceError(
    ErrorContext::new("Failed to converge")
        .with_location(ErrorLocation::new(file!(), line!()))
);
let diagnostics = error(&err);

println!("{}", diagnostics); // Comprehensive diagnostic report

Re-exports

pub use recovery::hints;

pub use recovery::ErrorAggregator;

pub use recovery::ErrorSeverity;

pub use recovery::RecoverableError;

pub use recovery::RecoveryHint;

pub use recovery::RecoveryStrategy;

pub use diagnostics::error;

pub use diagnostics::error_with_context;

pub use diagnostics::EnvironmentInfo;

pub use diagnostics::ErrorDiagnosticReport;

pub use diagnostics::ErrorDiagnostics;

pub use diagnostics::ErrorOccurrence;

pub use diagnostics::ErrorPattern;

pub use diagnostics::PerformanceImpact;

pub use circuitbreaker::get_circuitbreaker;

pub use circuitbreaker::list_circuitbreakers;

pub use circuitbreaker::CircuitBreaker;

pub use circuitbreaker::CircuitBreakerConfig;

pub use circuitbreaker::CircuitBreakerStatus;

pub use circuitbreaker::CircuitState;

pub use circuitbreaker::FallbackStrategy;

pub use circuitbreaker::ResilientExecutor;

pub use circuitbreaker::RetryExecutor;

pub use circuitbreaker::RetryPolicy;

Modules

circuitbreaker

Circuit breaker pattern for error handling

diagnostics

Advanced error diagnostics and reporting for SciRS2

prelude

Prelude module for convenient imports Commonly used error handling types and functions

recovery

Advanced error recovery and resilience mechanisms for SciRS2

Structs

ErrorContext

Error context containing additional information about an error

ErrorLocation

Location information for error context

Enums

CoreError

Core error type for SciRS2

Functions

chainerror

Create an error chain by adding a new error context

check_dimensions

Checks dimensions

check_domain

Checks if a condition is true, otherwise returns a domain error

check_value

Checks if a value is valid

context

Get predictive error analysis for a given context

converterror

Convert an error from one type to a CoreError

diagnoseerror

Alpha 6 Enhanced Diagnostic Functions

diagnoseerror_advanced

Advanced error diagnosis function.

get_recovery_strategies

Get domain-specific recovery strategies for an error

recorderror

Record an error for pattern analysis

validate

Checks if a value is valid according to a validator function

Type Aliases

CoreResult

Result type alias for core operations