[Issue] Compile Error: misplaced compiler directive

[Min8Yue]

I tried to use nested annotations, a compilation error was reported, and the error message was not enough for me to locate the problem. When I changed the location of the function in the source code, the problem disappeared. Source Code

package main

import (
    "context"
    "fmt"

    "github.com/dengsgo/go-decorator/decor"
)

func main() {
    Processor()
}

func Processor() {
    ctx := context.Background()
    DM(ctx, "a")
}

//go:decor Decor
func RpcRank(ctx context.Context, input string) (output string, err error) {
    fmt.Println("RpcRank")
    return input, nil
}

//go:decor Decor
func Rank(ctx context.Context, input string) (output string, err error) {
    fmt.Println("rank")
    RpcRank(ctx, input)
    return input, nil
}

//go:decor Decor
func DM(ctx context.Context, input string) (output string, err error) {
    fmt.Println("dm")
    Rank(ctx, input)
    return "a", err
}

func Decor(ctx *decor.Context) {
    fmt.Println("a")
    ctx.TargetDo()
}

output

x go run -toolexec decorator main.go
# command-line-arguments
./main.go:22: misplaced compiler directive
command-line-arguments: open /var/folders/3g/8n4r6n1d5b1fz6phh1rpfmx80000gp/T/go-build3187272546/b001/_pkg_.a: no such file or directory

Enviroment go version go1.22.5 darwin/arm64

[dengsgo]

x go run -toolexec decorator main.go

command-line-arguments

./main.go:22: misplaced compiler directive command-line-arguments: open /var/folders/3g/8n4r6n1d5b1fz6phh1rpfmx80000gp/T/go-build3187272546/b001/pkg.a: no such file or directory

这个错误通常是在使用 go-decorator 之前有编译过此代码，go 的旧编译缓存被引用导致的。

可以尝试使用 -a 标志强制重新编译一次来解决。在这个 case 中，可以使用命令: 

$ go run -toolexec decorator -a main.go

---

This error is usually caused by compiling the code before using go-decorator, and the old compilation cache of go is being referenced.

Try forcing a recompile with the -a flag. In this case, you can use the command: 

$ go run -toolexec decorator -a main.go

[Min8Yue]

相同的源码，还是无法通过编译. 你可以尝试复现吗？

$ go run -toolexec decorator -a main.go
# command-line-arguments
./main.go:22: misplaced compiler directive
command-line-arguments: open /var/folders/3g/8n4r6n1d5b1fz6phh1rpfmx80000gp/T/go-build2815434048/b001/_pkg_.a: no such file or directory

[dengsgo]

相同的源码，还是无法通过编译. 你可以尝试复现吗？

$ go run -toolexec decorator -a main.go
# command-line-arguments
./main.go:22: misplaced compiler directive
command-line-arguments: open /var/folders/3g/8n4r6n1d5b1fz6phh1rpfmx80000gp/T/go-build2815434048/b001/_pkg_.a: no such file or directory

看报错似乎不是 decorator 的问题。使用 go build -toolexec decorator 编译试试看。