#!/usr/bin/env nomsu -V6.15.13.8
#
    Tool to print out a parse tree of files in an easy-to-read format. Usage:
    nomsu tools/parse.nom file1 file2 directory1 ...        
    
use "filesystem"
use "commandline"

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(print tree $t at indent $indent) means:
    if $t.type is:
        "Action":
            say "\($indent)Action (\($t.stub)):"
            for $arg in $t:
                if ($arg is syntax tree):
                    print tree $arg at indent "\$indent  "
        
        "MethodCall":
            say "\($indent)MethodCall on:"
            print tree $t.1 at indent "\$indent    "
            print tree $t.2 at indent "\$indent    "
        
        "Number":
            say "\$indent\($t.1)"
        
        "Var":
            say "\($indent)$\($t.1)"
        
        else:
            say "\$indent\($t.type):"
            for $arg in $t:
                when:
                    ($arg is syntax tree):
                        print tree $arg at indent "\$indent  "
                    
                    else:
                        say "\$indent  \(quote $arg)"

command line program with $args:
    for $filename in $args.extras:
        $file = (read file $filename)
        unless $file:
            fail "File does not exist: \$filename"
        $nomsu = (NomsuCode from (Source $filename 1 (size of $file)) $file)
        $tree = ($nomsu parsed)
        print tree $tree at indent ""