$namespace=HeuristicLab.Problems.GPDL

using System.Text;
using System.Collections.Generic;
using IEnumerableConstraintNode = System.Collections.Generic.IEnumerable<ConstraintNode>;

COMPILER GPDef
  public static HeuristicLab.Optimization.IProblem problem;
  
CHARACTERS
  letter = 'A'..'Z' + 'a'..'z'.
  digit = '0'..'9'.

TOKENS
  ident = letter {letter | digit}  .

COMMENTS
  FROM "/*" TO "*/" NESTED

IGNORE '\t' + '\r' + '\n'


PRODUCTIONS

  SourceCode<out string src> =                                                    (. src = ""; .)
   "<<"                                                                           (. int beg = la.pos; .)
   {ANY}                                                                          (. int end = la.pos; .)
   ">>"                                                                           (. if(end>beg) src = scanner.buffer.GetString(beg, end); .)
  .

  GPDef =                                                                         (.
                                                                                    RuleNode ruleNode = null;
                                                                                    GPDefNode gpDef = new GPDefNode();
                                                                                    NonTerminalNode ntNode = null;
                                                                                    FitnessFunctionNode fitnessFunNode = null;
                                                                                    TerminalNode tNode = null;
                                                                                    problem = null;
                                                                                    string src = "";
                                                                                  .)
    "PROBLEM" ident                                                               (. gpDef.Name = t.val; .)
    ["CODE" SourceCode<out src>                                                   (. gpDef.ClassCodeNode = new CodeNode{SrcCode = src}; .)
    ]
    ["INIT" SourceCode<out src>                                                   (. gpDef.InitCodeNode = new CodeNode{SrcCode = src}; .)
    ]

    "NONTERMINALS" { NonterminalDecl<out ntNode>                                  (. gpDef.NonTerminals.Add(ntNode); .)
    }
    "TERMINALS" { TerminalDecl<out tNode>                                         (. gpDef.Terminals.Add(tNode); .)
    }
    "RULES" { RuleDef<out ruleNode>                                               (. gpDef.Rules.Add(ruleNode); .)
    }
                                                                                  (. fitnessFunNode = new FitnessFunctionNode();
                                                                                         gpDef.FitnessFunctionNode = fitnessFunNode;
                                                                                  .)
    ("MAXIMIZE"                                                                   (. fitnessFunNode.Maximization = true; .)
    | "MINIMIZE"                                                                  (. fitnessFunNode.Maximization = false; .)
    )
     SourceCode<out src>                                                          (. fitnessFunNode.SrcCode = src; .)
    "END" ident                                                                   (.
                                                                                    // SourceReader.Handle(GPDefSem.srcText.ToString()); // flush the source reader
                                                                                    var gen = new ProblemGenerator();
                                                                                    problem = gen.GenerateFromAst(gpDef);
                                                                                  .)
    '.'
  .


  /******************************************************/
  SemAction<out RuleActionNode action> =                                          (. RuleActionNode myAction = null; action = null; string src = ""; .)
    "SEM" SourceCode<out src>                                                     (.
                                                                                    myAction = new RuleActionNode();
                                                                                    myAction.SrcCode = src;
                                                                                    action = myAction;
                                                                                  .)
  .

  /******************************************************/
  NonterminalDecl<out NonTerminalNode ntNode> =                                   (. string identStr = ""; ntNode = null; string src = ""; .)
    ident                                                                         (. identStr = t.val; .)
    [ SourceCode<out src> ]                                                       (.
                                                                                    var myNtNode = new NonTerminalNode();
                                                                                    ntNode = myNtNode;
                                                                                    myNtNode.Ident = identStr;
                                                                                    myNtNode.FormalParameters = src;
                                                                                  .)
    '.'
  .

  /******************************************************/
  TerminalDecl<out TerminalNode tNode> =                                          (.
                                                                                    string identStr = "";
                                                                                    tNode = null;
                                                                                    TerminalNode myTNode = null;
                                                                                    IEnumerableConstraintNode constraints = null;
                                                                                    string src = "";
                                                                                  .)
  ident                                                                           (. identStr = t.val; .) 
  [ SourceCode<out src> ]                                                         (.
                                                                                         myTNode = new TerminalNode();
                                                                                         tNode = myTNode;
                                                                                         myTNode.Ident = identStr;
                                                                                         myTNode.FormalParameters = src;
                                                                                         myTNode.FieldDefinitions = SourceReader.ExtractFormalParameters(src);
                                                                                  .)
  [ "CONSTRAINTS" ConstraintDef<out constraints>                                  (. myTNode.Constraints = constraints; .)
  ]
  '.'
  .


  /******************************************************/
  ConstraintDef<out IEnumerableConstraintNode constraints>  =                   (.
                                                                                    List<ConstraintNode> constraintsList = new List<ConstraintNode>();
                                                                                    ConstraintNode n = null;
                                                                                    constraints = null;
                                                                                  .)
    { ConstraintRule<out n>                                                       (. constraintsList.Add(n); .)
    }
                                                                                  (. constraints = constraintsList; .)
  .

  /******************************************************/
  ConstraintRule<out ConstraintNode constraint> =                                 (.
                                                                                    constraint = null;
                                                                                  .)
    ident                                                                         (. constraint = new ConstraintNode(t.val); .)
    "IN" SetDefinition<constraint>                                                // (. SourceReader.Handle(GPDefSem.srcText.ToString()); .) // flush the source reader 
  .

  /******************************************************/
  SetDefinition<ConstraintNode constraint> =                                      (. string src = ""; .)
    ("SET"                                                                        (. constraint.Type = ConstraintNodeType.Set; .)
     SourceCode<out src>                                                          (. constraint.SetExpression = src; .)
     |
     "RANGE"                                                                      (. constraint.Type = ConstraintNodeType.Range; .)
     SourceCode<out src>                                                          (. constraint.RangeMinExpression = src; .)
     ".." SourceCode<out src>                                                     (. // SourceReader.Handle(GPDefSem.srcText.ToString()); // flush the source reader 
                                                                                    constraint.RangeMaxExpression = src; .)
    )
  .

  /******************************************************/
  RuleDef<out RuleNode rule> =                                                    (.
                                                                                    RuleExprNode expr = null;
                                                                                    string identStr = null;
                                                                                    RuleNode myRule = null;
                                                                                    rule = null;
                                                                                   string src = "";
                                                                                  .)
  ident                                                                           (. identStr = t.val; .) 
  [ SourceCode<out src> ] '='                                                     (.
                                                                                      myRule = new RuleNode();
                                                                                      rule = myRule;
                                                                                      myRule.NtSymbol = identStr;
                                                                                  .)
  ["LOCAL" SourceCode<out src>                                                    (.
                                                                                    myRule.LocalCode = src;
                                                                                  .)
  ]
  SynExpr<out expr> '.'                                                          (.
                                                                                    myRule.RuleExpr = expr;
                                                                                 .)
  .

  /******************************************************/
  SynExpr<out RuleExprNode expr > =                                               (.
                                                                                    expr = null;
                                                                                    AlternativesNode alt = null;
                                                                                  .)
  SynTerm<out expr>                                                               (.
                                                                                    alt = new AlternativesNode();
                                                                                    alt.Add(expr);
                                                                                  .)
  {
    '|' SynTerm<out expr>                                                         (. alt.Add(expr); expr = alt; .)
  }
  .

  /******************************************************/
  SynTerm<out RuleExprNode expr> =                                               (. SequenceNode seq = null; expr = null; .)
  SynFact<out expr>                                                              (.
                                                                                   seq = new SequenceNode();
                                                                                   seq.Add(expr);
                                                                                 .)
  {
    SynFact<out expr>                                                            (. seq.Add(expr); expr = seq; .)
  }
  .

  /******************************************************/
  SynFact<out RuleExprNode expr> =                                               (.
                                                                                   string identStr = "";
                                                                                   RuleActionNode action = null;
                                                                                   expr = null;
                                                                                   string src = "";
                                                                                 .)
    (ident                                                                       (. identStr = t.val; .)
     [ SourceCode<out src> ]                                                     (.
                                                                                    var callNode = new CallSymbolNode{Ident = identStr};
                                                                                    callNode.ActualParameter = src;
                                                                                    expr = callNode;
                                                                                 .)
// not implemented   | "EPS" 
// not implemented   | '(' SynExpr<ref rules, mBuilder> ')'
// not implemented   | '[' SynExpr<ref rules, mBuilder> ']'
// not implemented   | '{' SynExpr<ref rules, mBuilder> '}'
     | SemAction<out action>                                                      (. expr = action; .)
    )
  .

END GPDef.