Lukas Wegmann Luegg

## printAstInREPL.md

      
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                Luegg
                / printAstInREPL.md
            
            
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              December 30, 2015 03:09
            
          
    Print Raw ASTs in the REPL

Sometimes it is just useful to see the typechecked AST of a scala expression.
Macros to the rescue:
import scala.reflect.macros.Context
import scala.language.experimental.macros

  
## desugarScalaExpressions.md

      
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                Luegg
                / desugarScalaExpressions.md
            
            
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              August 26, 2019 12:45
            
          
    Desugar Scala Expressions

Use the compiler

scala -Xprint:typer -e "class A(val i: Int)" prints the desugarred expression after the typer phase. Use scala -Xshow-phases to get a list of all phases.
Or use a macro in the REPL

Paste this into a REPL session or in a file loaded with the :load command:

  
## index.html
<!DOCTYPE html>
<meta charset=utf-8>
<title>Minimal Plunk</title>

## typescript.sublime-build
{
    "cmd": ["tsc", "$file"],
    "file_regex": "(.*\\.ts?)\\s\\(([0-9]+)\\,([0-9]+)\\)\\:\\s(...*?)$",
    "selector": "source.ts",
    "osx": {
       "path": "/usr/local/bin:/opt/local/bin"
    },
    "windows": {
        "cmd": ["tsc.cmd", "$file"],
        "path": "C:\\Program Files\\nodejs\\;C:\\Users\\Lukas\\AppData\\Roaming\\npm\\"
	<!DOCTYPE html>
	<meta charset=utf-8>
	<title>Minimal Plunk</title>
	{
	"cmd": ["tsc", "$file"],
	"file_regex": "(.\\.ts?)\\s\\(([0-9]+)\\,([0-9]+)\\)\\:\\s(...?)$",
	"selector": "source.ts",
	"osx": {
	"path": "/usr/local/bin:/opt/local/bin"
	},
	"windows": {
	"cmd": ["tsc.cmd", "$file"],
	"path": "C:\\Program Files\\nodejs\\;C:\\Users\\Lukas\\AppData\\Roaming\\npm\\"