root/trunk/ProjectFortress/src/com/sun/fortress/parser/Literal.rats @ 2405

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    Copyright 2008 Sun Microsystems, Inc.,
    4150 Network Circle, Santa Clara, California 95054, U.S.A.
    All rights reserved.

    U.S. Government Rights - Commercial software.
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    trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
 ******************************************************************************/

/*
 * Definition of Fortress literals.
 */
module com.sun.fortress.parser.Literal(MayNewlineHeader, DelimitedExpr,
                                       NoSpaceExpr, Symbol, Spacing,
                                       Identifier);

import MayNewlineHeader;
import DelimitedExpr;
import NoSpaceExpr;
import Symbol;
import Spacing;
import Identifier;

/* LiteralExpr ::=
     ( w )
   | NumericLiteralExpr
   | CharLiteralExpr
   | StringLiteralExpr
 */
Expr LiteralExpr =
   <VOID> VoidLiteralExpr
   / <NUMERICAL> NumericLiteralExpr
   / <CHAR>CharLiteralExpr
   / <STRING> StringLiteralExpr
   ;

/* ArrayExpr ::= [ StaticArgs? w RectElements w ] */
ArrayElements ArrayExpr =
     void:opensquare a1:StaticArgs? w a2:RectElements w void:closesquare
     { if (a1 == null) yyValue = FortressUtil.finalizeArrayExpr(a2);
       else            yyValue = FortressUtil.addStaticArgsToArrayExpr(a1, a2);
     };

/* RectElements ::= NoSpaceExpr MultiDimCons* */
private ArrayElements RectElements =
     a1:NoSpaceExpr a2s:MultiDimCons*
     { if (a2s == null || a2s.isEmpty()) {
             List<ArrayExpr> list = new ArrayList<ArrayExpr>();
             list.add(new ArrayElement(a1.getSpan(), false, a1));
             yyValue = new ArrayElements(a1.getSpan(), false, 1, list);
         } else
           yyValue = FortressUtil.multiDimCons(a1, a2s.list());
     };

/* MultiDimCons ::= RectSeparator NoSpaceExpr */
com.sun.fortress.useful.Pair<Integer,Expr> MultiDimCons =
     a1:RectSeparator a2:NoSpaceExpr
     { yyValue = new com.sun.fortress.useful.Pair<Integer,Expr>(a1,a2); };

Expr VoidLiteralExpr =
     <FIRST> openparen w closeparen
     { yyValue = ExprFactory.makeVoidLiteralExpr(createSpan(yyStart,yyCount)); };

NumberLiteralExpr NumericLiteralExpr =
    a1:NumericWord a2s:RestNumericWord+ "_" a3:RadixSpecifier &{ NodeUtil.validNumericLiteral(a1, a2s.list(), a3) }
    { String numeral = a1;
      for (String numericWord: a2s.list()) {
          numeral += numericWord;
      }
      yyValue = ExprFactory.makeFloatLiteralExpr(createSpan(yyStart,yyCount),
                                                 numeral+"_"+NodeUtil.radix2Number(a3));
    }
  / a1:NumericWord a2s:RestNumericWord+ &{ NodeUtil.validNumericLiteral(a1, a2s.size()) }
    { String numeral = a1;
      for (String numericWord: a2s.list()) {
          numeral += numericWord;
      }
      yyValue = ExprFactory.makeFloatLiteralExpr(createSpan(yyStart,yyCount), numeral);
    }
  / FloatLiteralExpr
  / IntLiteralExpr ;

private transient String RestNumericWord =
    a1:NumericSeparator a2:NumericWord { yyValue = a1+a2; };

transient FloatLiteralExpr FloatLiteralExpr =
    <FIRST> a1:DigitString dot a2:DigitString
    { yyValue = ExprFactory.makeFloatLiteralExpr(createSpan(yyStart,yyCount),
                                                 a1 + "." + a2); };

transient IntLiteralExpr IntLiteralExpr =
    <FIRST> a1:NumericWord "_" a2:RadixSpecifier &{ NodeUtil.validNumericLiteral(a1, a2) }
    { Span span = createSpan(yyStart,yyCount);
      yyValue = ExprFactory.makeIntLiteralExpr(span, a1+"_"+NodeUtil.radix2Number(a2));
    }
  / a1:NumericWord &{ NodeUtil.validNumericLiteral(a1) }
    { yyValue = ExprFactory.makeIntLiteralExpr(createSpan(yyStart,yyCount), a1); }
  / a1:DigitString
    { yyValue = ExprFactory.makeIntLiteralExpr(createSpan(yyStart,yyCount),
                                               a1);
    };

private transient String NumericCharacter = [0-9a-zA-Z];
private transient String NumericWord =
    a1s:NumericCharacter+ a2s:("'" / NumericCharacter)* &{ NodeUtil.validNumericWord(a2s.list()) }
    { yyValue = "";
      for (String n: a1s.list()) {
          yyValue += n;
      }
      for (String n: a2s.list()) {
          yyValue += n;
      }
    };

private transient String NumericSeparator = "." ;

private transient String RadixSpecifier =
     RadixDigits
   / RadixNames ;

private transient String RadixDigits =
     "16"
   / "15"
   / "14"
   / "13"
   / "12"
   / "11"
   / "10"
   / "9"
   / "8"
   / "7"
   / "6"
   / "5"
   / "4"
   / "3"
   / "2" ;

private transient String RadixNames =
     "SIXTEEN"
   / "FIFTEEN"
   / "FOURTEEN"
   / "THIRTEEN"
   / "TWELVE"
   / "ELEVEN"
   / "TEN"
   / "NINE"
   / "EIGHT"
   / "SEVEN"
   / "SIX"
   / "FIVE"
   / "FOUR"
   / "THREE"
   / "TWO" ;

private transient String DigitString = [0-9]+;

CharLiteralExpr CharLiteralExpr =
     <FIRST> "'" a1:CharLiteralContent "'"
     { yyValue = ExprFactory.makeCharLiteralExpr(createSpan(yyStart,yyCount),
                                                 a1);
     };

StringLiteralExpr StringLiteralExpr =
     <FIRST> ["] a1:StringLiteralContent* ["]
     { String str = "";
       for (String c : (List<String>)a1.list()) {
           str = str.concat(c);
       }
       yyValue = new StringLiteralExpr(createSpan(yyStart,yyCount), false, str);
     };
private String StringLiteralContent =
     EscapeSequence
   / a1:(!["\\] _) { yyValue = String.valueOf(a1); };

private String EscapeSequence = '\\' a1:[btnfr"\\]
     { switch (a1) {
           case 'b': { yyValue = "\b"; break; }
           case 't': { yyValue = "\t"; break; }
           case 'n': { yyValue = "\n"; break; }
           case 'f': { yyValue = "\f"; break; }
           case 'r': { yyValue = "\r"; break; }
           case '"': { yyValue = "\""; break; }
           case '\'': { yyValue = "\'"; break; }
           case '\\': { yyValue = "\\"; break; }
           default: { yyValue = ""; }
       }
     };

private String CharLiteralContent =
     EscapeSequence
   / a1:(![\\] _) { yyValue = String.valueOf(a1); };