On Sun, Nov 25, 2018, 11:06 AM Ben Hoyt <benh...@gmail.com> wrote: > I just finished a little tool called "gosnip" that allows you to run > little snippets of Go code from the command line: > > https://github.com/benhoyt/gosnip > > To use it, just type something like: > > $ gosnip 'fmt.Println("Hello world")' > Hello world > > gosnip automatically adds (standard library) imports, rolls into into a > complete program, and uses "go run" to run it. > > To quote the "Why?" section in the README: I made gosnip because when > coding in Go I often want to try little snippets of code to see what they > do, for example, "how does format string %6.3f work again?" I could use the > Go playground, but it's nice to be able to use a one-line command. Also, I > often develop while offline on my bus commute, so don't have access to the > online Go playground (yes, I know it's possible to run the Go playground > locally). > > It was very handy to have go/parser available in the standard library, and > even nicer that it automatically provides the list of unresolved names -- > which I use to know what to import. > > "go run" isn't particularly fast for this use case, as it spawns the go > compiler, linker, and then the program itself. Seems to take about 250ms on > my macOS machine (and it's probably slower on Windows, as os/exec is > somewhat slower on Windows). > > If anyone knows a better way to run Go source, let me know. As much as I > like writing interpreters, it'd be a big job to write a Go compiler just > for this. In the meantime, 250ms will have to do. >
I've actually been using gomacro for this (testing a quick bit of syntax). I have to import the std libs that I need (auto import would be nice if it's not ambiguous), but it has nice output evaluation and state. https://github.com/cosmos72/gomacro > Feedback welcome! > > -Ben > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
