Scala: all steps 0-9 but no metadata.

1 files changed, 45 insertions, 0 deletions

diff --git a/scala/printer.scala b/scala/printer.scala
new file mode 100644
index 0000000..74b1433
--- /dev/null
+++ b/scala/printer.scala
@@ -0,0 +1,45 @@
+import types.Function
+
+object printer {
+  def _pr_str(obj: Any, print_readably: Boolean = true): String = {
+    val _r = print_readably
+    return obj match {
+      case l: List[Any]   => "(" + l.map(_pr_str(_, _r)).mkString(" ") + ")"
+      case v: Array[Any]  => "[" + v.map(_pr_str(_, _r)).mkString(" ") + "]"
+      case m: Map[String @unchecked,Any @unchecked] => {
+        val lst = m.map{case (k,v) => List(k, v)}.flatten
+        "{" + lst.map(_pr_str(_,_r)).mkString(" ") + "}"
+      }
+      case s: String      => {
+        if (s.length > 0 && s(0) == '\u029e') {
+          ":" + s.substring(1,s.length)
+        } else if (_r) {
+          //println("here1: " + s)
+          "\"" + s.replace("\\", "\\\\")
+                  .replace("\"", "\\\"")
+                  .replace("\n", "\\n") + "\""
+        } else {
+          s
+        }
+      }
+      case Symbol(s)      => s
+      case a: types.Atom  => "(atom " + a.value + ")"
+      case null           => "nil"
+      case _              => {
+        if (obj.isInstanceOf[Function]) {
+          val f = obj.asInstanceOf[Function]
+          "<function (fn* " + _pr_str(f.params) + " " + _pr_str(f.ast) + ")>"
+        } else {
+          obj.toString
+        }
+      }
+    }
+  }
+
+  def _pr_list(lst: List[Any], print_readably: Boolean = true,
+               sep: String = " "): String = {
+    lst.map{_pr_str(_, print_readably)}.mkString(sep)
+  }
+}
+
+// vim: ts=2:sw=2