hi,

at first 👍 for this great tool.

i refactored the code a bit and now the ast parser run at the browser. the go code is compiled to wasm and some small changes at the angular conde need to be done to make the serverless version.

if you like the idea, let me know and i prepare a PR.

> go get -d github.com/yuroyoro/goast-viewer
package syscall/js: unrecognized import path "syscall/js" (import path does not begin with hostname)

go version go1.10.8 darwin/amd64

OS: macOS Mojave 10.14.6 18G1012 x86_64 Host: MacBookPro15,1 Kernel: 18.7.0 Uptime: 7 days, 8 hours, 50 mins Packages: 135 (brew) Shell: bash 5.0.11 Resolution: 1680x1050, 1920x1080 DE: Aqua WM: Spectacle Terminal: iTerm2 Terminal Font: HackNerdFontComplete-Regular 12 CPU: Intel i7-9750H (12) @ 2.60GHz GPU: Intel UHD Graphics 630, Radeon Pro 555X Memory: 10353MiB / 16384MiB

This patch makes a visual improvement to the tree's collapse buttons, by changing the hyphen to a minus sign.

The ASCII hyphen (-) in many fonts is shorter and lower than the plus sign (+) so they do not match: +-+-+-+ The minus sign (−) at U+2212 should have the same width and alignment as plus, so they match up: +−+−+−+

Hello @yuroyoro! Now, you server create AST from Go source. Is possible add parsing string to Go AST expression?

Result of next example is AST of expression d*6*integer(r*8+ff,12,3):

package main

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

func main() {
	a, _ := parser.ParseExpr("d*6*integer(r*8+ff,12,3)")
	ast.Print(token.NewFileSet(), a)
}