Macro impl_context_error 

macro_rules! impl_context_error {
    ($error_type:ident) => { ... };
    ($vis:vis $error_type:ident) => { ... };
}

Implement context-aware error handling for a custom type.

This macro generates a struct definition and all necessary trait implementations to make a type work with expect_error.

Generated Structure

The macro generates a struct with these fields:

• message: Cow<'static, str> - The error message
• source: Option<Box<dyn Error + Send + Sync>> - The underlying error
• location: Option<&'static Location> - Where the error was created

Usage

Basic Usage (crate-private visibility)

use scoped_error::impl_context_error;

impl_context_error!(MyError);
// Generates: pub(crate) struct MyError { ... }

Custom Visibility

use scoped_error::impl_context_error;

impl_context_error!(pub MyError);
// Generates: pub struct MyError { ... }

Generated Implementations

The macro generates:

• #[derive(Debug)]
• std::error::Error (with source() method)
• std::fmt::Display (includes location when available)
• From<(Cow<'static, str>, Frame)> (for use with expect_error)