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Developer tools · #sema
When dozens of async tasks compete for a limited resource, a counting semaphore can serialize access without blocking the executor. This guide walks through the Rust `sema` crate, shows a minimal example, explains fairness, and warns about common pitfalls.
Use a counting semaphore to cap concurrent access to a finite resource like an API or connection pool, preventing exhaustion while managing blocking, leaks, and ordering risks.
Learn how to identify, diagnose, and remediate architectural drift using Sema's analysis tools. This guide covers forbidden dependencies, layer breaches, and ownership syncs.
Learn how to use counting semaphores to prevent resource exhaustion by bounding concurrency at the trust boundary, including implementation patterns and operational checks.
Java's Semaphore caps concurrent access with a simple acquire/try/finally-release pattern. This guide shows a worked rate-limiter example, fairness and tryAcquire options, and the permit-leak and deadlock mistakes to avoid.
Go infers generic type arguments by unifying call-site argument types with type parameters — conservatively. Here's how it works, where it gives up, and how to design APIs that infer cleanly.
Learn how Clang’s Sema resolves dependent names in templates, why it matters for diagnostics and compile time, and how to use -Wtemplate-debug to see the process.
Pick the right tool for extracting Go dependency graphs in CI. Compare Sema, go mod graph, golangci‑lint, and custom scripts, then see a step‑by‑step CI implementation and verification checklist.
Older Clang reported only that a C++20 concept failed. Modern Sema walks the constraint tree and names the exact sub-expression that broke — here's what changed, with a worked example and the compile-time trade-offs.
rust
go