Parse code using AST

goASTParsing.go

package main

import (
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
)

func main() {

	src := `package main
	
import ( 
    "log" 
    "fmt" 
)

func a() {
	print("Yo")
}

func e() {
	print("Lele")
}

a := 1
b := 2
print(a + b)
println("Hello World")
`

	fset := token.NewFileSet()

	f, err := parser.ParseFile(fset, "", src, 0)
	if err != nil {
		print("ERROR: ", err.Error())
	}
	
	ast.Print(fset, f)
	
	for _, section := range f.Decls {
		if section, ok := section.(*ast.GenDecl); ok {
			fmt.Println("-=> ", section.Tok)
		}
		
		if section, ok := section.(*ast.FuncDecl); ok {
			fmt.Println("-=> func ", section.Name.Name, " - from: ", section.Type.Params.Opening, " to: ", section.Type.Params.Closing)
		}
		
		if section, ok := section.(*ast.BadDecl); ok {
			fmt.Println("-=> Main from: ", section.From, " to: ", section.To)
		}
	}
}