Roll Observatory packages and add a roll script

petitparser/lib/src/lisp/parser.dart

-part of lisp;
-
-/**
- * LISP parser.
- */
-class LispParser extends GrammarParser {
-  LispParser() : super(new LispParserDefinition());
-}
-
-/**
- * LISP parser definition.
- */
-class LispParserDefinition extends LispGrammarDefinition {
-
-  list() => super.list().map((each) => each[1]);
-
-  cell() => super.cell().map((each) => new Cons(each[0], each[1]));
-  empty() => super.empty().map((each) => null);
-
-  string() => super.string().map((each) => new String.fromCharCodes(each[1]));
-  characterEscape() => super.characterEscape().map((each) => each[1].codeUnitAt(0));
-  characterRaw() => super.characterRaw().map((each) => each.codeUnitAt(0));
-
-  symbol() => super.symbol().map((each) => new Name(each));
-  number() => super.number().map((each) {
-    var floating = double.parse(each);
-    var integral = floating.toInt();
-    if (floating == integral && each.indexOf('.') == -1) {
-      return integral;
-    } else {
-      return floating;
-    }
-  });
-
-  quote() => super.quote().map((each) => new Cons(Natives._quote, each[1]));
-
-}