iGo, Intermediate Golang

This project provides an intermediate source representation of go source files.

Most of the code comes directly from the standard library of pkg/go however the core part, parser and scanner has been heavily modified, the igo ast instead is pretty much unchanged to allow an easily swap with the original one.

The aim of this project is to provide an alternative go fmt which means the you will be able to write as you like and then distribute in the standard go way (*.go formatted files).

It's in beta stage

How it works?

You can TRY IT on play.igolang.io or with the cli:

usage: igo [compile|parse|build] [flags] [path ...]
  -comments=true: print comments
  -dest="": destination directory
  -tabs=true: indent with tabs
  -tabwidth=8: tab width
$ igo parse # will convert any *.go file in *.igo
$ igo compile # will convert *.igo source code in *.go

Note that build currently is not yet implemented.

Manually convert go code:

import
	"bytes"
	"fmt"
	"github.com/DAddYE/igo/from_go"
	"go/parser"
	"go/token"
	"io/ioutil"
	"log"
	"testing"

func ExampleFromGo()
  # Initialize the scanner.
  fset := token.NewFileSet() # positions are relative to fset

  const filename = "../ast/ast.go"

  src, err := ioutil.ReadFile(filename)
  if err != nil
    log.Fatalf("%s", err)


  file, err := parser.ParseFile(fset, filename, src, parser.ParseComments)
  if err != nil
    fmt.Println(err)
    return

  # Print the function body into buffer buf.
  # The file set is provided to the printer so that it knows
  # about the original source formatting and can add additional
  # line breaks where they were present in the source.
  var buf bytes.Buffer
  from_go.Fprint(&buf, fset, file)

  # Print the cleaned-up body text to stdout.
  fmt.Println(&buf)

Manually convert iGo code:

import
	"bytes"
	"fmt"
	"github.com/DAddYE/igo/parser"
	"github.com/DAddYE/igo/to_go"
	"github.com/DAddYE/igo/token"
	"io/ioutil"
	"log"
	"testing"

func ExampleToGo()
	# Initialize the scanner.
	fset := token.NewFileSet() # positions are relative to fset

	const filename = "../ast/ast.igo"

	src, err := ioutil.ReadFile(filename)
	if err != nil
		log.Fatalf("%s", err)

	file, err := parser.ParseFile(fset, filename, src, parser.ParseComments)
	if err != nil
		fmt.Println(err)
		return

	# Print the function body into buffer buf.
	# The file set is provided to the printer so that it knows
	# about the original source formatting and can add additional
	# line breaks where they were present in the source.
	var buf bytes.Buffer
	to_go.Fprint(&buf, fset, file)

	# Print the cleaned-up body text to stdout.
	fmt.Println(&buf)

How looks like?

Just browse *.igo files, but soon I'll make a ebnf notation.

What will change?

Pretty much really few things, golang itself is almost perfect, this parser will allow you to skip some annoyance. Nothing more.

Editors

• Vim
• add yours ...

What's left?

In my roadmap there is:

• Builds (aka igo build|run|test)
• Add GoCode like for editors
• iGo format (aka igo fmt)
• iGo doc (aka igo doc)
• Expose ast (aka little macros)
• Expose __filename__, __fname__

Other info

This project was partially influenced by Nimrod which I highly suggest to try.

License MIT/BSD-style

Author Davide D'Agostino (@DAddYE) and The Go Authors