Nice/src/bossa/syntax contract.nice,1.4,1.5 analyse.nice,1.130,1.131

Update of /cvsroot/nice/Nice/src/bossa/syntax
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv28507/src/bossa/syntax

Modified Files:
	contract.nice analyse.nice 
Log Message:
Simplified postcondition resolution by placing 'result' in the SymbolTable
used for the expressions instead of the parent.


Index: analyse.nice
===================================================================
RCS file: /cvsroot/nice/Nice/src/bossa/syntax/analyse.nice,v
retrieving revision 1.130
retrieving revision 1.131
diff -C2 -d -r1.130 -r1.131
*** analyse.nice	22 Feb 2005 10:27:09 -0000	1.130
--- analyse.nice	4 Mar 2005 01:55:19 -0000	1.131
***************
*** 22,34 ****
  
  Statement analyse(Statement, VarScope, TypeScope, boolean mustReturnAValue);
! Expression analyse(Expression, VarScope, TypeScope);
  
  // Implementation
  
! Info buildInfo(VarScope varScope, TypeScope typeScope);
! buildInfo(varScope, typeScope)
  {
    let SymbolTable<mlsub.typing.TypeSymbol> t = new SymbolTable();
!   return new Info(vars: new SymbolTable(), typeVars: t,
  		  outerVarScope: varScope, outerTypeScope: typeScope,
  		  typeMap: new TypeMaper(inner: t, global: typeScope));
--- 22,35 ----
  
  Statement analyse(Statement, VarScope, TypeScope, boolean mustReturnAValue);
! Expression analyse(Expression, VarScope, TypeScope,
! 		   SymbolTable<VarSymbol> vars = new SymbolTable());
  
  // Implementation
  
! Info buildInfo(VarScope varScope, TypeScope typeScope,
! 	       SymbolTable<VarSymbol> vars = new SymbolTable())
  {
    let SymbolTable<mlsub.typing.TypeSymbol> t = new SymbolTable();
!   return new Info(vars: vars, typeVars: t,
  		  outerVarScope: varScope, outerTypeScope: typeScope,
  		  typeMap: new TypeMaper(inner: t, global: typeScope));
***************
*** 63,68 ****
  
  
! analyse(Expression e, varScope, typeScope) = 
!     analyse(e, buildInfo(varScope, typeScope));
  
  List<VarSymbol> lookup(VarScope scope, ?LocatedString i)
--- 64,69 ----
  
  
! analyse(Expression e, varScope, typeScope, vars) =
!     analyse(e, buildInfo(varScope, typeScope, vars));
  
  List<VarSymbol> lookup(VarScope scope, ?LocatedString i)

Index: contract.nice
===================================================================
RCS file: /cvsroot/nice/Nice/src/bossa/syntax/contract.nice,v
retrieving revision 1.4
retrieving revision 1.5
diff -C2 -d -r1.4 -r1.5
*** contract.nice	16 Jan 2005 21:51:15 -0000	1.4
--- contract.nice	4 Mar 2005 01:55:19 -0000	1.5
***************
*** 27,32 ****
    private StringBuffer ensureRepr = new StringBuffer("ensures ");
  
-   private ?MonoSymbol result = null;
- 
    public void addElement(Expression condition, ?Expression name, boolean precond)
    {
--- 27,30 ----
***************
*** 58,84 ****
    }
  
!   void resolve(VarScope scope, TypeScope typeScope, 
! 	       mlsub.typing.Monotype resultType, 
                 Location location)
    {
!     pre = pre.map(Expression e => analyse(e, scope, typeScope)); 
  
      if (post.isEmpty())
        return;
  
!     if (! nice.tools.typing.Types.isVoid(resultType))
!       result = new ResultMonoSymbol(new LocatedString("result", location), 
!                               type: resultType);
  
!     try {
!       if (result != null)
! 	scope.addSymbol(result);
  
!       post = post.map(Expression e => analyse(e, scope, typeScope)); 
!     }
!     finally {
!       if (result != null)
! 	scope.removeSymbol(result);
!     }
    }
  
--- 56,76 ----
    }
  
!   void resolve(VarScope scope, TypeScope typeScope,
! 	       mlsub.typing.Monotype resultType,
                 Location location)
    {
!     pre = pre.map(Expression e => analyse(e, scope, typeScope));
  
      if (post.isEmpty())
        return;
  
!     SymbolTable<VarSymbol> vars = new SymbolTable();
  
!     // Make 'result' a variable in the scope of the post-conditions
!     if (! nice.tools.typing.Types.isVoid(resultType))
!       vars["result"] = new ResultMonoSymbol
!         (new LocatedString("result", location), type: resultType);
  
!     post = post.map(Expression e => analyse(e, scope, typeScope, vars));
    }
  
***************
*** 125,127 ****
    isAssignable() = false;
    compile() = gnu.expr.CheckContract.result;
! }
\ No newline at end of file
--- 117,119 ----
    isAssignable() = false;
    compile() = gnu.expr.CheckContract.result;
! }



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