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Package astcopy implements Go AST reflection-free deep copy operations.
Go version 1.16+
go get github.com/go-toolsmith/astcopy
package main import ( "fmt" "go/ast" "go/token" "github.com/go-toolsmith/astcopy" "github.com/go-toolsmith/astequal" "github.com/go-toolsmith/strparse" ) func main() { x := strparse.Expr(`1 + 2`).(*ast.BinaryExpr) y := astcopy.BinaryExpr(x) fmt.Println(astequal.Expr(x, y)) // => true // Now modify x and make sure y is not modified. z := astcopy.BinaryExpr(y) x.Op = token.SUB fmt.Println(astequal.Expr(y, z)) // => true fmt.Println(astequal.Expr(x, y)) // => false }