Go Advanced Topics — Reflection, CGo, Code Generation, and Tooling for Expert Go
DodaTech
Updated 2026-06-28
1 min read
In this tutorial, you will learn about Go Advanced Topics. We cover key concepts, practical examples, and best practices to help you master this topic.
Go advanced topics include Code Generation with go generate, build tags for conditional compilation, plugin system, and WASM compilation.
What You'll Learn
- Code generation with go generate
- Build tags for platform code
- Go plugin system
- WebAssembly with Go
Why It Matters
Advanced Go is used by tool builders and framework authors. Docker uses build tags. Kubernetes uses code generation. DodaZIP uses WASM for browser-based zip processing.
Real-World Use
Code generation for APIs, platform-specific implementations, plugin architectures, web assembly modules.
Code Generation
//go:generate stringer -type=Status
type Status int
const (
Active Status = iota
Inactive
Pending
)
Build Tags
//go:build linux
package osutil
func GetOS() string { return "linux" }
//go:build darwin
package osutil
func GetOS() string { return "macOS" }
//go:build !linux && !darwin
package osutil
func GetOS() string { return "unknown" }
Go Plugin
// plugin/greeter.go
package main
import "fmt"
var Greet func(name string) string
func init() {
Greet = func(name string) string {
return fmt.Sprintf("Hello, %s!", name)
}
}
// main.go
p, _ := plugin.Open("plugin.so")
sym, _ := p.Lookup("Greet")
greet := sym.(func(string) string)
fmt.Println(greet("World"))
WebAssembly
package main
func main() {}
//export add
func add(a, b int) int {
return a + b
}
GOOS=js GOARCH=wasm go build -o main.wasm main.go
const go = new Go();
WebAssembly.instantiateStreaming(
fetch("main.wasm"), go.importObject
).then(result => {
go.run(result.instance);
console.log(globalThis.add(3, 4)); // 7
});
| Topic | Description | Link |
|---|---|---|
| Go Reflection | Runtime type inspection | {{< ref "32-reflection" >}} |
| Go CGo | C interop | {{< ref "33-cgo" >}} |
| Rust | Safe systems programming | Rust |