Agent Skills: Result Type Pattern (C-Specific)

Result Type Pattern (C-Specific)

Return struct containing success/failure status plus value or error. Explicit error handling without exceptions. Caller must check result.

ikigai Application

Core type: res_t used throughout:

res_t result = ik_cfg_load(ctx, path, &cfg);
if (!result.ok) {
    // Handle error, result.error contains message
}

Macros:

• OK(value) - Construct success result
• ERR(msg) - Construct error result
• TRY(expr) - Propagate error if failed
• CHECK(cond, msg) - Return error if condition false

Benefits:

• Errors can't be ignored (must check .ok)
• Error context propagates up call stack
• No hidden control flow (unlike exceptions)

See: project/error_handling.md for patterns.