* Patch from Mattias Gaertner:

  jswriter: 
    fixed some empty lines 
  pasresolver: 
    procedure str, function str
  fppas2js: 
    procedure str,function str
    write less empty blocks
    target platform browser and nodejs

git-svn-id: trunk@35633 -

packages/fcl-js/src/jswriter.pp

@@ -127,7 +127,7 @@ Type
     // one per type of statement
     Procedure WriteValue(V : TJSValue);  virtual;
     Procedure WriteRegularExpressionLiteral(El: TJSRegularExpressionLiteral);
-    Procedure WriteVariableStatement(el: TJSVariableStatement);
+    Procedure WriteVariableStatement(El: TJSVariableStatement);
     Procedure WriteEmptyBlockStatement(El: TJSEmptyBlockStatement); virtual;
     Procedure WriteEmptyStatement(El: TJSEmptyStatement);virtual;
     Procedure WriteLiteral(El: TJSLiteral);virtual;
@@ -157,6 +157,8 @@ Type
     Procedure WriteFuncDef(FD: TJSFuncDef);virtual;
     Procedure WritePrimaryExpression(El: TJSPrimaryExpression);virtual;
     Procedure WriteBinary(El: TJSBinary);virtual;
+    Function IsEmptyStatement(El: TJSElement): boolean;
+    Function HasLineEnding(El: TJSElement): boolean;
   Public
     Function EscapeString(const S: TJSString; Quote: TJSEscapeQuote = jseqDouble): TJSString;
     Constructor Create(AWriter : TTextWriter);
@@ -584,6 +586,7 @@ procedure TJSWriter.WriteFuncDef(FD: TJSFuncDef);
 Var
   C : Boolean;
   I : Integer;
+  A: TJSElement;
 
 begin
   C:=(woCompact in Options);
@@ -609,10 +612,11 @@ begin
     FSkipCurlyBrackets:=True;
     //writeln('TJSWriter.WriteFuncDef '+FD.Body.ClassName);
     WriteJS(FD.Body);
-    If (Assigned(FD.Body.A))
-    and (not (FD.Body.A is TJSStatementList))
-    and (not (FD.Body.A is TJSSourceElements))
-    and (not (FD.Body.A is TJSEmptyBlockStatement))
+    A:=FD.Body.A;
+    If (Assigned(A))
+        and (not (A is TJSStatementList))
+        and (not (A is TJSSourceElements))
+        and (not (A is TJSEmptyBlockStatement))
     then
       if C then
         Write('; ')
@@ -861,7 +865,7 @@ begin
     Indent;
     if not C then writeln('');
     end;
-  if Assigned(El.A) and (El.A.ClassType<>TJSEmptyBlockStatement) then
+  if not IsEmptyStatement(El.A) then
     begin
     WriteJS(El.A);
     LastEl:=El.A;
@@ -926,6 +930,9 @@ Var
   S : AnsiString;
   AllowCompact, WithBrackets: Boolean;
 begin
+  {$IFDEF VerboseJSWriter}
+  System.writeln('TJSWriter.WriteBinary SkipRoundBrackets=',FSkipRoundBrackets);
+  {$ENDIF}
   WithBrackets:=not FSkipRoundBrackets;
   if WithBrackets then
     Write('(');
@@ -945,6 +952,25 @@ begin
     Write(')');
 end;
 
+function TJSWriter.IsEmptyStatement(El: TJSElement): boolean;
+begin
+  if (El=nil) then
+    exit(true);
+  if (El.ClassType=TJSEmptyStatement) and not (woEmptyStatementAsComment in Options) then
+    exit(true);
+  Result:=false;
+end;
+
+function TJSWriter.HasLineEnding(El: TJSElement): boolean;
+begin
+  if El<>nil then
+    begin
+    if (El.ClassType=TJSStatementList) or (El.ClassType=TJSSourceElements) then
+      exit(true);
+    end;
+  Result:=false;
+end;
+
 procedure TJSWriter.WriteConditionalExpression(El: TJSConditionalExpression);
 
 begin
@@ -987,22 +1013,29 @@ end;
 
 procedure TJSWriter.WriteIfStatement(El: TJSIfStatement);
 
+var
+  BTrueEmpty, C: Boolean;
 begin
+  C:=woCompact in Options;
   Write('if (');
   FSkipRoundBrackets:=true;
   WriteJS(El.Cond);
   FSkipRoundBrackets:=false;
   Write(')');
-  If Not (woCompact in Options) then
+  If Not C then
     Write(' ');
-  if (El.BTrue<>nil) and (not (El.BTrue is TJSEmptyStatement)) then
-    begin
+  BTrueEmpty:=IsEmptyStatement(El.BTrue);
+  if not BTrueEmpty then
     WriteJS(El.BTrue);
-    end;
-  if Assigned(El.BFalse) then
+  if not IsEmptyStatement(El.BFalse) then
     begin
-    if (El.BTrue=nil) or (El.BTrue is TJSEmptyStatement) then
-      Writeln('{}')
+    if BTrueEmpty then
+      begin
+      if C then
+        Write('{}')
+      else
+        Writeln('{}');
+      end
     else
       Write(' ');
     Write('else ');
@@ -1131,7 +1164,7 @@ begin
       Indent;
       WriteJS(EC.Body);
       Undent;
-      if ((EC.Body is TJSStatementList) or (EC.Body is TJSEmptyBlockStatement)) then
+      if (EC.Body is TJSStatementList) or (EC.Body is TJSEmptyBlockStatement) then
         begin
         if C then
           begin
@@ -1226,12 +1259,15 @@ Var
 begin
   C:=woCompact in Options;
   Write('try {');
-  if Not C then writeln('');
-  FSkipCurlyBrackets:=True;
-  Indent;
-  WriteJS(El.Block);
-  if Not C then writeln('');
-  Undent;
+  if not IsEmptyStatement(El.Block) then
+    begin
+    if Not C then writeln('');
+    FSkipCurlyBrackets:=True;
+    Indent;
+    WriteJS(El.Block);
+    if (Not C) and (not (El.Block is TJSStatementList)) then writeln('');
+    Undent;
+    end;
   Write('}');
   If (El is TJSTryCatchFinallyStatement) or (El is TJSTryCatchStatement) then
     begin
@@ -1241,11 +1277,14 @@ begin
       Write(' {')
     else
       Writeln(' {');
-    FSkipCurlyBrackets:=True;
-    Indent;
-    WriteJS(El.BCatch);
-    Undent;
-    if Not C then writeln('');
+    if not IsEmptyStatement(El.BCatch) then
+      begin
+      FSkipCurlyBrackets:=True;
+      Indent;
+      WriteJS(El.BCatch);
+      Undent;
+      if (Not C) and (not (El.BCatch is TJSStatementList)) then writeln('');
+      end;
     Write('}');
     end;
   If (El is TJSTryCatchFinallyStatement) or (El is TJSTryFinallyStatement) then
@@ -1254,11 +1293,14 @@ begin
       Write(' finally {')
     else
       Writeln(' finally {');
-    Indent;
-    FSkipCurlyBrackets:=True;
-    WriteJS(El.BFinally);
-    Undent;
-    if Not C then writeln('');
+    if not IsEmptyStatement(El.BFinally) then
+      begin
+      Indent;
+      FSkipCurlyBrackets:=True;
+      WriteJS(El.BFinally);
+      Undent;
+      if (Not C) and (not (El.BFinally is TJSStatementList)) then writeln('');
+      end;
     Write('}');
     end;
 end;
@@ -1267,7 +1309,7 @@ procedure TJSWriter.WriteFunctionBody(El: TJSFunctionBody);
 
 begin
   //writeln('TJSWriter.WriteFunctionBody '+El.A.ClassName+' FSkipBrackets='+BoolToStr(FSkipCurlyBrackets,'true','false'));
-  if Assigned(El.A) and (not (El.A is TJSEmptyBlockStatement)) then
+  if not IsEmptyStatement(El.A) then
     WriteJS(El.A);
 end;
 
@@ -1311,11 +1353,11 @@ begin
   WriteElements(El.Statements);
 end;
 
-procedure TJSWriter.WriteVariableStatement(el: TJSVariableStatement);
+procedure TJSWriter.WriteVariableStatement(El: TJSVariableStatement);
 
 begin
   Write('var ');
-  WriteJS(EL.A);
+  WriteJS(El.A);
 end;
 
 procedure TJSWriter.WriteJS(El: TJSElement);

packages/fcl-passrc/src/pasresolver.pp

@@ -110,7 +110,7 @@ Works:
 - procedure break, procedure continue
 - built-in functions pred, succ for range type and enums
 - untyped parameters
-
+- built-in procedure str(const boolean|integer|enumvalue|classinstance,var s: string)
 
 ToDo:
 - fix slow lookup declaration proc in PParser
@@ -159,9 +159,9 @@ Notes:
    @f();  @ operator applies to result of f
    f(); use f's result
    FuncVar:=Func; if mode=objfpc: incompatible
-                  if mode=delphi: implicit addr of function f, not yet implemented
-   if f=g then : can implicit resolve each side once, at the moment: always implicit
-   p(f), f as var parameter: always implicit, thus incompatible
+                  if mode=delphi: implicit addr of function f
+   if f=g then : can implicit resolve each side once
+   p(f), f as var parameter: can implicit
 }
 unit PasResolver;
 
@@ -430,7 +430,9 @@ type
     bfLow,
     bfHigh,
     bfPred,
-    bfSucc
+    bfSucc,
+    bfStrProc,
+    bfStrFunc
     );
   TResolverBuiltInProcs = set of TResolverBuiltInProc;
 const
@@ -450,7 +452,9 @@ const
     'Low',
     'High',
     'Pred',
-    'Succ'
+    'Succ',
+    'Str',
+    'Str'
     );
   bfAllStandardProcs = [Succ(bfCustom)..high(TResolverBuiltInProc)];
 
@@ -1042,6 +1046,8 @@ type
       ErrorEl: TPasElement; RaiseOnError: boolean): boolean;
     procedure ConvertRangeToFirstValue(var ResolvedEl: TPasResolverResult);
     function IsCharLiteral(const Value: string): boolean; virtual;
+    function CheckBuiltInMinParamCount(Proc: TResElDataBuiltInProc; Expr: TPasExpr;
+      MinCount: integer; RaiseOnError: boolean): boolean;
   protected
     // built-in functions
     function BI_Length_OnGetCallCompatibility(Proc: TResElDataBuiltInProc;
@@ -1082,6 +1088,17 @@ type
       Expr: TPasExpr; RaiseOnError: boolean): integer; virtual;
     procedure BI_PredSucc_OnGetCallResult({%H-}Proc: TResElDataBuiltInProc;
       {%H-}Params: TParamsExpr; out ResolvedEl: TPasResolverResult); virtual;
+    function BI_Str_CheckParam(Param: TPasExpr;
+      const ParamResolved: TPasResolverResult; ArgNo: integer;
+      RaiseOnError: boolean): integer;
+    function BI_StrProc_OnGetCallCompatibility(Proc: TResElDataBuiltInProc;
+      Expr: TPasExpr; RaiseOnError: boolean): integer; virtual;
+    procedure BI_StrProc_OnFinishParamsExpr(Proc: TResElDataBuiltInProc;
+      Params: TParamsExpr); virtual;
+    function BI_StrFunc_OnGetCallCompatibility(Proc: TResElDataBuiltInProc;
+      Expr: TPasExpr; RaiseOnError: boolean): integer; virtual;
+    procedure BI_StrFunc_OnGetCallResult({%H-}Proc: TResElDataBuiltInProc;
+      {%H-}Params: TParamsExpr; out ResolvedEl: TPasResolverResult); virtual;
   public
     constructor Create;
     destructor Destroy; override;
@@ -4168,6 +4185,9 @@ begin
   ComputeElement(Expr,ExprResolved,[rcSkipTypeAlias]);
   if (rrfCanBeStatement in ExprResolved.Flags) then
     exit;
+  {$IFDEF VerbosePasResolver}
+  writeln('TPasResolver.ResolveImplSimple El=',GetObjName(El),' El.Expr=',GetObjName(El.Expr),' ExprResolved=',GetResolverResultDesc(ExprResolved));
+  {$ENDIF}
   RaiseMsg(20170216152127,nIllegalExpression,sIllegalExpression,[],El);
 end;
 
@@ -4215,9 +4235,9 @@ begin
     Primitive:=TPrimitiveExpr(El);
     case Primitive.Kind of
     pekIdent: ResolveNameExpr(El,Primitive.Value,Access);
-    pekNumber: exit;
-    pekString: exit;
-    pekNil,pekBoolConst: exit;
+    pekNumber: ;
+    pekString: ;
+    pekNil,pekBoolConst: ;
     else
       RaiseNotYetImplemented(20160922163451,El);
     end;
@@ -4243,6 +4263,11 @@ begin
     end
   else
     RaiseNotYetImplemented(20170222184329,El);
+
+  if El.format1<>nil then
+    ResolveExpr(El.format1,rraRead);
+  if El.format2<>nil then
+    ResolveExpr(El.format2,rraRead);
 end;
 
 procedure TPasResolver.ResolveStatementConditionExpr(El: TPasExpr);
@@ -6077,6 +6102,19 @@ begin
     end;
 end;
 
+function TPasResolver.CheckBuiltInMinParamCount(Proc: TResElDataBuiltInProc;
+  Expr: TPasExpr; MinCount: integer; RaiseOnError: boolean): boolean;
+begin
+  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<MinCount) then
+    begin
+    if RaiseOnError then
+      RaiseMsg(20170216152248,nWrongNumberOfParametersForCallTo,
+        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+    exit(false);
+    end;
+  Result:=true;
+end;
+
 function TPasResolver.BI_Length_OnGetCallCompatibility(
   Proc: TResElDataBuiltInProc; Expr: TPasExpr; RaiseOnError: boolean): integer;
 // check params of built in proc 'length'
@@ -6085,13 +6123,8 @@ var
   Param: TPasExpr;
   ParamResolved: TPasResolverResult;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<1) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152248,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,1,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: string or dynamic array
@@ -6142,13 +6175,8 @@ var
   ParamResolved: TPasResolverResult;
   ArrayType: TPasArrayType;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<2) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152253,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,2,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: string or array variable
@@ -6222,13 +6250,8 @@ var
   ParamResolved: TPasResolverResult;
   EnumType: TPasEnumType;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<2) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152259,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,2,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: variable of set of enumtype
@@ -6412,13 +6435,8 @@ var
   Param: TPasExpr;
   ParamResolved, IncrResolved: TPasResolverResult;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<1) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152318,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,1,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: var Integer
@@ -6498,13 +6516,8 @@ var
   Param: TPasExpr;
   ParamResolved: TPasResolverResult;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<1) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152326,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,1,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: pointer or proc type
@@ -6551,13 +6564,8 @@ var
   Param: TPasExpr;
   ParamResolved: TPasResolverResult;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<1) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152332,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,1,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: enum or char
@@ -6606,13 +6614,8 @@ var
   ParamResolved: TPasResolverResult;
   TypeEl: TPasType;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<1) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152337,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,1,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: enum, range or char
@@ -6698,13 +6701,8 @@ var
   Param: TPasExpr;
   ParamResolved: TPasResolverResult;
 begin
-  if (not (Expr is TParamsExpr)) or (length(TParamsExpr(Expr).Params)<1) then
-    begin
-    if RaiseOnError then
-      RaiseMsg(20170216152341,nWrongNumberOfParametersForCallTo,
-        sWrongNumberOfParametersForCallTo,[Proc.Signature],Expr);
+  if not CheckBuiltInMinParamCount(Proc,Expr,1,RaiseOnError) then
     exit(cIncompatible);
-    end;
   Params:=TParamsExpr(Expr);
 
   // first param: enum, range, set, char or integer
@@ -6740,6 +6738,165 @@ begin
   ResolvedEl.Flags:=ResolvedEl.Flags-[rrfWritable];
 end;
 
+function TPasResolver.BI_Str_CheckParam(Param: TPasExpr;
+  const ParamResolved: TPasResolverResult; ArgNo: integer; RaiseOnError: boolean
+  ): integer;
+
+  function CheckFormat(FormatExpr: TPasExpr; Index: integer;
+    const ParamResolved: TPasResolverResult): boolean;
+  var
+    ResolvedEl: TPasResolverResult;
+    Ok: Boolean;
+  begin
+    if FormatExpr=nil then exit(true);
+    Result:=false;
+    Ok:=false;
+    if ParamResolved.BaseType in btAllFloats then
+      // floats supports value:Width:Precision
+      Ok:=true
+    else
+      // all other only support only Width
+      Ok:=Index<2;
+    if not Ok then
+      begin
+      if RaiseOnError then
+        RaiseMsg(20170319222319,nIllegalExpression,sIllegalExpression,[],FormatExpr);
+      exit;
+      end;
+    ComputeElement(FormatExpr,ResolvedEl,[]);
+    if not (ResolvedEl.BaseType in btAllInteger) then
+      begin
+      if RaiseOnError then
+        RaiseMsg(20170319221515,nXExpectedButYFound,sXExpectedButYFound,
+          ['integer',GetResolverResultDescription(ResolvedEl)],FormatExpr);
+      exit;
+      end;
+    if not (rrfReadable in ResolvedEl.Flags) then
+      begin
+      if RaiseOnError then
+        RaiseMsg(20170319221755,nNotReadable,sNotReadable,[],FormatExpr);
+      exit;
+      end;
+    Result:=true;
+  end;
+
+var
+  TypeEl: TPasType;
+begin
+  Result:=cIncompatible;
+  if ParamResolved.BaseType in (btAllInteger+btAllBooleans+btAllFloats) then
+    Result:=cExact
+  else if ParamResolved.BaseType=btContext then
+    begin
+      TypeEl:=ParamResolved.TypeEl;
+      if TypeEl.ClassType=TPasEnumType then
+        Result:=cExact
+    end;
+  if Result=cIncompatible then
+    begin
+    if RaiseOnError then
+      RaiseMsg(20170319220517,nIncompatibleTypeArgNo,sIncompatibleTypeArgNo,
+        [IntToStr(ArgNo),GetTypeDesc(ParamResolved.TypeEl),'boolean, integer, enum value'],
+        Param);
+    exit;
+    end;
+  if not CheckFormat(Param.format1,1,ParamResolved) then
+    exit(cIncompatible);
+  if not CheckFormat(Param.format2,2,ParamResolved) then
+    exit(cIncompatible);
+end;
+
+function TPasResolver.BI_StrProc_OnGetCallCompatibility(
+  Proc: TResElDataBuiltInProc; Expr: TPasExpr; RaiseOnError: boolean): integer;
+// check params of built-in procedure 'Str'
+var
+  Params: TParamsExpr;
+  Param: TPasExpr;
+  ParamResolved: TPasResolverResult;
+begin
+  if not CheckBuiltInMinParamCount(Proc,Expr,2,RaiseOnError) then
+    exit(cIncompatible);
+  Params:=TParamsExpr(Expr);
+
+  // first param: boolean, integer, enum, class instance
+  Param:=Params.Params[0];
+  ComputeElement(Param,ParamResolved,[]);
+  Result:=BI_Str_CheckParam(Param,ParamResolved,1,RaiseOnError);
+  if Result=cIncompatible then
+    exit;
+
+  // second parameter: string variable
+  Param:=Params.Params[1];
+  ComputeElement(Param,ParamResolved,[]);
+  Result:=cIncompatible;
+  if ResolvedElCanBeVarParam(ParamResolved) then
+    begin
+    if ParamResolved.BaseType in btAllStrings then
+      Result:=cExact;
+    end;
+  if Result=cIncompatible then
+    begin
+    if RaiseOnError then
+      RaiseMsg(20170319220806,nIncompatibleTypeArgNo,sIncompatibleTypeArgNo,
+        ['1',GetTypeDesc(ParamResolved.TypeEl),'string variable'],
+        Param);
+    exit;
+    end;
+
+  if length(Params.Params)>2 then
+    begin
+    if RaiseOnError then
+      RaiseMsg(20170216152345,nWrongNumberOfParametersForCallTo,
+        sWrongNumberOfParametersForCallTo,[Proc.Signature],Params.Params[2]);
+    exit(cIncompatible);
+    end;
+
+  Result:=cExact;
+end;
+
+procedure TPasResolver.BI_StrProc_OnFinishParamsExpr(Proc: TResElDataBuiltInProc;
+  Params: TParamsExpr);
+var
+  P: TPasExprArray;
+begin
+  if Proc=nil then ;
+  P:=Params.Params;
+  FinishParamExpressionAccess(P[0],rraRead);
+  FinishParamExpressionAccess(P[1],rraVarParam);
+end;
+
+function TPasResolver.BI_StrFunc_OnGetCallCompatibility(
+  Proc: TResElDataBuiltInProc; Expr: TPasExpr; RaiseOnError: boolean): integer;
+var
+  Params: TParamsExpr;
+  Param: TPasExpr;
+  ParamResolved: TPasResolverResult;
+  i: Integer;
+begin
+  if not CheckBuiltInMinParamCount(Proc,Expr,1,RaiseOnError) then
+    exit(cIncompatible);
+  Params:=TParamsExpr(Expr);
+
+  // param: string, boolean, integer, enum, class instance
+  for i:=0 to length(Params.Params)-1 do
+    begin
+    Param:=Params.Params[i];
+    ComputeElement(Param,ParamResolved,[]);
+    Result:=BI_Str_CheckParam(Param,ParamResolved,i+1,RaiseOnError);
+    if Result=cIncompatible then
+    exit;
+    end;
+
+  Result:=cExact;
+end;
+
+procedure TPasResolver.BI_StrFunc_OnGetCallResult(Proc: TResElDataBuiltInProc;
+  Params: TParamsExpr; out ResolvedEl: TPasResolverResult);
+begin
+  if Params=nil then ;
+  SetResolverIdentifier(ResolvedEl,btString,Proc.Proc,FBaseTypes[btString],[rrfReadable]);
+end;
+
 constructor TPasResolver.Create;
 begin
   inherited Create;
@@ -7255,6 +7412,13 @@ begin
   if bfSucc in BaseProcs then
     AddBuiltInProc('Succ','function Succ(const ordinal): ordinal',
         @BI_PredSucc_OnGetCallCompatibility,@BI_PredSucc_OnGetCallResult,nil,bfSucc);
+  if bfStrProc in BaseProcs then
+    AddBuiltInProc('Str','procedure Str(const var; var String)',
+        @BI_StrProc_OnGetCallCompatibility,nil,
+        @BI_StrProc_OnFinishParamsExpr,bfStrProc,[bipfCanBeStatement]);
+  if bfStrFunc in BaseProcs then
+    AddBuiltInProc('Str','function Str(const var): String',
+        @BI_StrFunc_OnGetCallCompatibility,@BI_StrFunc_OnGetCallResult,nil,bfStrFunc);
 end;
 
 function TPasResolver.AddBaseType(aName: shortstring; Typ: TResolverBaseType

packages/fcl-passrc/src/pastree.pp

@@ -507,7 +507,7 @@ type
     ElType: TPasType;
   end;
 
-  { TPasEnumValue }
+  { TPasEnumValue - Parent is TPasEnumType }
 
   TPasEnumValue = class(TPasElement)
   public

packages/fcl-passrc/tests/tcresolver.pas

@@ -159,6 +159,9 @@ type
     Procedure TestIncDec;
     Procedure TestIncStringFail;
     Procedure TestVarExternal;
+    Procedure TestStr_BaseTypes;
+    Procedure TestStr_StringFail;
+    Procedure TestStr_CharFail;
 
     // strings
     Procedure TestString_SetLength;
@@ -179,6 +182,7 @@ type
     Procedure TestEnumOrd;
     Procedure TestEnumPredSucc;
     Procedure TestEnum_CastIntegerToEnum;
+    Procedure TestEnum_Str;
 
     // operators
     Procedure TestPrgAssignment;
@@ -560,7 +564,7 @@ begin
         +' Scanner at'
         +' at '+aFilename+'('+IntToStr(aRow)+','+IntToStr(aCol)+')'
         +' Line="'+Scanner.CurLine+'"');
-      raise E;
+      Fail(E.Message);
       end;
     on E: EPasResolve do
       begin
@@ -575,12 +579,12 @@ begin
       WriteSources(aFilename,aRow,aCol);
       writeln('ERROR: TTestResolver.ParseProgram PasResolver: '+E.ClassName+':'+E.Message
         +' at '+aFilename+'('+IntToStr(aRow)+','+IntToStr(aCol)+')');
-      raise E;
+      Fail(E.Message);
       end;
     on E: Exception do
       begin
       writeln('ERROR: TTestResolver.ParseProgram Exception: '+E.ClassName+':'+E.Message);
-      raise E;
+      Fail(E.Message);
       end;
   end;
   TAssert.AssertSame('Has resolver',ResolverEngine,Parser.Engine);
@@ -607,7 +611,7 @@ begin
         +' Col='+IntToStr(Scanner.CurColumn)
         +' Line="'+Scanner.CurLine+'"'
         );
-      raise E;
+      Fail(E.Message);
       end;
     on E: EPasResolve do
       begin
@@ -617,12 +621,12 @@ begin
         +' Col='+IntToStr(Scanner.CurColumn)
         +' Line="'+Scanner.CurLine+'"'
         );
-      raise E;
+      Fail(E.Message);
       end;
     on E: Exception do
       begin
       writeln('ERROR: TTestResolver.ParseUnit Exception: '+E.ClassName+':'+E.Message);
-      raise E;
+      Fail(E.Message);
       end;
   end;
   TAssert.AssertSame('Has resolver',ResolverEngine,Parser.Engine);
@@ -1196,7 +1200,7 @@ begin
   WriteSources(aFilename,aRow,aCol);
   s:='[TTestResolver.RaiseErrorAtSrc] '+aFilename+'('+IntToStr(aRow)+','+IntToStr(aCol)+') Error: '+Msg;
   writeln('ERROR: ',s);
-  raise EAssertionFailedError.Create(s);
+  Fail(s);
 end;
 
 procedure TCustomTestResolver.RaiseErrorAtSrcMarker(Msg: string; aMarker: PSrcMarker);
@@ -1219,7 +1223,7 @@ function TCustomTestResolver.AddModule(aFilename: string): TTestEnginePasResolve
 begin
   //writeln('TTestResolver.AddModule ',aFilename);
   if FindModuleWithFilename(aFilename)<>nil then
-    raise EAssertionFailedError.Create('TTestResolver.AddModule: file "'+aFilename+'" already exists');
+    Fail('TTestResolver.AddModule: file "'+aFilename+'" already exists');
   Result:=TTestEnginePasResolver.Create;
   Result.Filename:=aFilename;
   Result.AddObjFPCBuiltInIdentifiers;
@@ -1406,7 +1410,7 @@ begin
             +' Line="'+CurEngine.Scanner.CurLine+'"'
             );
           WriteSources(ErrFilename,ErrRow,ErrCol);
-          raise E;
+          Fail(E.Message);
           end;
       end;
       //writeln('TTestResolver.OnPasResolverFindUnit END ',CurUnitName);
@@ -1415,7 +1419,7 @@ begin
       end;
     end;
   writeln('TTestResolver.OnPasResolverFindUnit missing unit "',aUnitName,'"');
-  raise EAssertionFailedError.Create('can''t find unit "'+aUnitName+'"');
+  Fail('can''t find unit "'+aUnitName+'"');
 end;
 
 procedure TCustomTestResolver.OnFindReference(El: TPasElement; FindData: pointer);
@@ -1445,7 +1449,7 @@ var
     s:='TTestResolver.OnCheckElementParent El='+GetTreeDesc(El)+' '+
       ResolverEngine.GetElementSourcePosStr(El)+' '+Msg;
     writeln('ERROR: ',s);
-    raise EAssertionFailedError.Create(s);
+    Fail(s);
   end;
 
 begin
@@ -1811,6 +1815,62 @@ begin
   ParseProgram;
 end;
 
+procedure TTestResolver.TestStr_BaseTypes;
+begin
+  StartProgram(false);
+  Add('var');
+  Add('  b: boolean;');
+  Add('  i: longint;');
+  Add('  i64: int64;');
+  Add('  s: single;');
+  Add('  d: double;');
+  Add('  aString: string;');
+  Add('begin');
+  Add('  Str(b,{#a_var}aString);');
+  Add('  Str(b:1,aString);');
+  Add('  Str(b:i,aString);');
+  Add('  Str(i,aString);');
+  Add('  Str(i:2,aString);');
+  Add('  Str(i:i64,aString);');
+  Add('  Str(i64,aString);');
+  Add('  Str(i64:3,aString);');
+  Add('  Str(i64:i,aString);');
+  Add('  Str(s,aString);');
+  Add('  Str(d,aString);');
+  Add('  Str(d:4,aString);');
+  Add('  Str(d:4:5,aString);');
+  Add('  Str(d:4:i,aString);');
+  Add('  aString:=Str(b);');
+  Add('  aString:=Str(i:3);');
+  Add('  aString:=Str(d:3:4);');
+  Add('  aString:=Str(b,i,d);');
+  ParseProgram;
+  CheckAccessMarkers;
+end;
+
+procedure TTestResolver.TestStr_StringFail;
+begin
+  StartProgram(false);
+  Add('var');
+  Add('  aString: string;');
+  Add('begin');
+  Add('  Str(aString,aString);');
+  CheckResolverException('Incompatible type arg no. 1: Got "String", expected "boolean, integer, enum value"',
+    nIncompatibleTypeArgNo);
+end;
+
+procedure TTestResolver.TestStr_CharFail;
+begin
+  StartProgram(false);
+  Add('var');
+  Add('  c: char;');
+  Add('  aString: string;');
+  Add('begin');
+  Add('  Str(c,aString);');
+  CheckResolverException('Incompatible type arg no. 1: Got "Char", expected "boolean, integer, enum value"',
+    nIncompatibleTypeArgNo);
+end;
+
 procedure TTestResolver.TestString_SetLength;
 begin
   StartProgram(false);
@@ -2127,6 +2187,22 @@ begin
   CheckAccessMarkers;
 end;
 
+procedure TTestResolver.TestEnum_Str;
+begin
+  StartProgram(false);
+  Add('type');
+  Add('  TFlag = (red, green, blue);');
+  Add('var');
+  Add('  f: TFlag;');
+  Add('  i: longint;');
+  Add('  aString: string;');
+  Add('begin');
+  Add('  aString:=str(f);');
+  Add('  aString:=str(f:3);');
+  Add('  str(f,aString);');
+  ParseProgram;
+end;
+
 procedure TTestResolver.TestPrgAssignment;
 var
   El: TPasElement;

packages/pastojs/src/fppas2js.pp

@@ -153,8 +153,7 @@ Works:
   - use 0o for octal literals
 
 ToDos:
-- function str, procedure str
-- try raise E1 except on E: E2 end;
+- class external
 
 Not in Version 1.0:
 - write, writeln
@@ -245,8 +244,8 @@ resourcestring
   sMissingExternalName = 'Missing external name';
 
 const
-  DefaultFuncNameArray_SetLength = 'arraySetLength'; // rtl.arraySetLength
   DefaultFuncNameArray_NewMultiDim = 'arrayNewMultiDim'; // rtl.arrayNewMultiDim
+  DefaultFuncNameArray_SetLength = 'arraySetLength'; // rtl.arraySetLength
   DefaultFuncNameAs = 'as'; // rtl.as
   DefaultFuncNameCreateClass = 'createClass'; // rtl.createClass
   DefaultFuncNameFreeClassInstance = '$destroy';
@@ -268,6 +267,8 @@ const
   DefaultFuncNameSet_Reference = 'refSet'; // rtl.refSet
   DefaultFuncNameSet_SymDiffSet = 'symDiffSet'; // rtl.symDiffSet >< (symmetrical difference)
   DefaultFuncNameSet_Union = 'unionSet'; // rtl.unionSet +
+  DefaultFuncNameSpaceLeft = 'spaceLeft'; // rtl.spaceLeft
+  DefaultVarNameExceptObject = '$e';
   DefaultVarNameImplementation = '$impl';
   DefaultVarNameLoopEnd = '$loopend';
   DefaultVarNameModules = 'pas';
@@ -544,9 +545,20 @@ type
 
   TPas2JSIsElementUsedEvent = function(Sender: TObject; El: TPasElement): boolean of object;
 
+  TPasToJsPlatform = (
+    PlatformBrowser,
+    PlatformNodeJS
+    );
+  TPasToJsPlatforms = set of TPasToJsPlatform;
+const
+  PasToJsPlatformNames: array[TPasToJsPlatform] of string = (
+   'Browser',
+   'NodeJS'
+    );
+type
   TPasToJsProcessor = (
-    pECMAScript5,
-    pECMAScript6
+    ProcessorECMAScript5,
+    ProcessorECMAScript6
     );
   TPasToJsProcessors = set of TPasToJsProcessor;
 const
@@ -614,9 +626,12 @@ type
     FFuncNameSet_Reference: String;
     FFuncNameSet_SymDiffSet: String;
     FFuncNameSet_Union: String;
+    FFuncNameSpaceLeft: String;
     FOnIsElementUsed: TPas2JSIsElementUsedEvent;
     FOptions: TPasToJsConverterOptions;
+    FTargetPlatform: TPasToJsPlatform;
     FTargetProcessor: TPasToJsProcessor;
+    FVarNameExceptObject: String;
     FVarNameImplementation: String;
     FVarNameLoopEnd: String;
     FVarNameModules: String;
@@ -635,7 +650,6 @@ type
       DataClass: TPas2JsElementDataClass): TPas2JsElementData;
     procedure AddElementData(Data: TPas2JsElementData);
     Procedure AddToSourceElements(Src: TJSSourceElements; El: TJSElement);
-    procedure SetTargetProcessor(const AValue: TPasToJsProcessor);
     procedure SetUseEnumNumbers(const AValue: boolean);
     procedure SetUseLowerCase(const AValue: boolean);
     procedure SetUseSwitchStatement(const AValue: boolean);
@@ -658,7 +672,6 @@ type
     Function TransformVariableName(El: TPasElement; AContext : TConvertContext) : String; virtual;
     Function TransformModuleName(El: TPasModule; AContext : TConvertContext) : String; virtual;
     Function IsPreservedWord(aName: string): boolean; virtual;
-    Function GetExceptionObjectName(AContext: TConvertContext) : string;
     // Never create an element manually, always use the below functions
     Function IsElementUsed(El: TPasElement): boolean; virtual;
     Function CreateElement(C: TJSElementClass; Src: TPasElement): TJSElement; virtual;
@@ -702,9 +715,10 @@ type
       RecordExpr: TJSElement; AContext: TConvertContext): TJSElement; virtual;
     Function CreateCallback(El: TPasElement; ResolvedEl: TPasResolverResult;
       AContext: TConvertContext): TJSElement; virtual;
+    Function CreateAssignStatement(LeftEl: TPasElement; AssignContext: TAssignContext): TJSElement; virtual;
     // Statements
-    Function ConvertImplBlockElements(El: TPasImplBlock; AContext: TConvertContext): TJSElement; virtual;
-    Function ConvertBeginEndStatement(El: TPasImplBeginBlock; AContext: TConvertContext): TJSElement; virtual;
+    Function ConvertImplBlockElements(El: TPasImplBlock; AContext: TConvertContext; NilIfEmpty: boolean): TJSElement; virtual;
+    Function ConvertBeginEndStatement(El: TPasImplBeginBlock; AContext: TConvertContext; NilIfEmpty: boolean): TJSElement; virtual;
     Function ConvertStatement(El: TPasImplStatement; AContext: TConvertContext ): TJSElement; virtual;
     Function ConvertAssignStatement(El: TPasImplAssign; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertRaiseStatement(El: TPasImplRaise; AContext: TConvertContext ): TJSElement; virtual;
@@ -741,6 +755,9 @@ type
     Function ConvertBuiltInHigh(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertBuiltInPred(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertBuiltInSucc(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
+    Function ConvertBuiltInStrProc(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
+    Function ConvertBuiltInStrFunc(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
+    Function ConvertBuiltInStrParam(El: TPasExpr; AContext: TConvertContext; IsFirst: boolean): TJSElement; virtual;
     Function ConvertRecordValues(El: TRecordValues; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertSelfExpression(El: TSelfExpr; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertBinaryExpression(El: TBinaryExpr; AContext: TConvertContext): TJSElement; virtual;
@@ -776,7 +793,8 @@ type
     Function ConvertPasElement(El : TPasElement; Resolver: TPasResolver) : TJSElement;
     // options
     Property Options: TPasToJsConverterOptions read FOptions write FOptions;
-    Property TargetProcessor: TPasToJsProcessor read FTargetProcessor write SetTargetProcessor;
+    Property TargetPlatform: TPasToJsPlatform read FTargetPlatform write FTargetPlatform;
+    Property TargetProcessor: TPasToJsProcessor read FTargetProcessor write FTargetProcessor;
     Property UseLowerCase: boolean read GetUseLowerCase write SetUseLowerCase default true;
     Property UseSwitchStatement: boolean read GetUseSwitchStatement write SetUseSwitchStatement;// default false, because slower than "if" in many engines
     Property UseEnumNumbers: boolean read GetUseEnumNumbers write SetUseEnumNumbers; // default false
@@ -806,6 +824,8 @@ type
     Property FuncNameSet_Reference: String read FFuncNameSet_Reference write FFuncNameSet_Reference; // rtl.refSet
     Property FuncNameSet_SymDiffSet: String read FFuncNameSet_SymDiffSet write FFuncNameSet_SymDiffSet; // rtl.symDiffSet (symmetrical difference ><
     Property FuncNameSet_Union: String read FFuncNameSet_Union write FFuncNameSet_Union; // rtl.unionSet +
+    Property FuncNameSpaceLeft: String read FFuncNameSpaceLeft write FFuncNameSpaceLeft;
+    Property VarNameExceptObject: String read FVarNameExceptObject write FVarNameExceptObject;
     Property VarNameImplementation: String read FVarNameImplementation write FVarNameImplementation;// empty to not use, default '$impl'
     Property VarNameLoopEnd: String read FVarNameLoopEnd write FVarNameLoopEnd;
     Property VarNameModules: String read FVarNameModules write FVarNameModules;
@@ -813,9 +833,6 @@ type
     Property VarNameWith: String read FVarNameWith write FVarNameWith;
   end;
 
-var
-  DefaultJSExceptionObject: string = '$e';
-
 function CodePointToJSString(u: cardinal): TJSString;
 function PosLast(c: char; const s: string): integer;
 
@@ -2202,11 +2219,11 @@ begin
           S:=copy(El.Value,2,length(El.Value));
           case El.Value[1] of
           '$': S:='0x'+S;
-          '&': if TargetProcessor=pECMAScript5 then
+          '&': if TargetProcessor=ProcessorECMAScript5 then
                  S:='0'+S
                else
                  S:='0o'+S;
-          '%': if TargetProcessor=pECMAScript5 then
+          '%': if TargetProcessor=ProcessorECMAScript5 then
                  S:=''
                else
                  S:='0b'+S;
@@ -2948,6 +2965,8 @@ begin
         bfHigh: Result:=ConvertBuiltInHigh(El,AContext);
         bfPred: Result:=ConvertBuiltInPred(El,AContext);
         bfSucc: Result:=ConvertBuiltInSucc(El,AContext);
+        bfStrProc: Result:=ConvertBuiltInStrProc(El,AContext);
+        bfStrFunc: Result:=ConvertBuiltInStrFunc(El,AContext);
       else
         RaiseNotSupported(El,AContext,20161130164955,'built in proc '+ResolverBuiltInProcNames[BuiltInProc.BuiltIn]);
       end;
@@ -3142,7 +3161,7 @@ var
   ResolvedParam0: TPasResolverResult;
   ArrayType: TPasArrayType;
   Call: TJSCallExpression;
-  ValInit, Arg, LHS: TJSElement;
+  ValInit, Arg: TJSElement;
   AssignSt: TJSSimpleAssignStatement;
   AssignContext: TAssignContext;
   ElType: TPasType;
@@ -3163,7 +3182,6 @@ begin
     {$IFDEF VerbosePasResolver}
     writeln('TPasToJSConverter.ConvertBuiltInSetLength array');
     {$ENDIF}
-    LHS:=nil;
     AssignContext:=TAssignContext.Create(El,nil,AContext);
     try
       AContext.Resolver.ComputeElement(El.Value,AssignContext.LeftResolved,[rcNoImplicitProc]);
@@ -3187,26 +3205,8 @@ begin
       Call.Args.Elements.AddElement.Expr:=ValInit;
 
       // create left side:  array =
-      LHS:=ConvertElement(Param0,AssignContext);
-      if AssignContext.Call<>nil then
-        begin
-        // array has a setter -> right side was already added as parameter
-        if AssignContext.RightSide<>nil then
-          RaiseInconsistency(20170207215447);
-        Result:=LHS;
-        end
-      else
-        begin
-        AssignSt:=TJSSimpleAssignStatement(CreateElement(TJSSimpleAssignStatement,El));
-        AssignSt.LHS:=LHS;
-        AssignSt.Expr:=AssignContext.RightSide;
-        AssignContext.RightSide:=nil;
-        Result:=AssignSt;
-        end;
-
+      Result:=CreateAssignStatement(Param0,AssignContext);
     finally
-      if Result=nil then
-        LHS.Free;
       AssignContext.RightSide.Free;
       AssignContext.Free;
     end;
@@ -3241,12 +3241,9 @@ var
   Call: TJSCallExpression;
   Param0: TPasExpr;
   AssignContext: TAssignContext;
-  AssignSt: TJSSimpleAssignStatement;
-  LHS: TJSElement;
   FunName: String;
 begin
   Result:=nil;
-  LHS:=nil;
   Param0:=El.Params[0];
   AssignContext:=TAssignContext.Create(El,nil,AContext);
   try
@@ -3264,26 +3261,8 @@ begin
     Call.Args.Elements.AddElement.Expr:=ConvertElement(Param0,AContext);
     Call.Args.Elements.AddElement.Expr:=ConvertElement(El.Params[1],AContext);
 
-    // create left side:  aSet =
-    LHS:=ConvertElement(Param0,AssignContext);
-    if AssignContext.Call<>nil then
-      begin
-      // set has a setter -> right side was already added as parameter
-      if AssignContext.RightSide<>nil then
-        RaiseInconsistency(20170301145100);
-      Result:=LHS;
-      end
-    else
-      begin
-      AssignSt:=TJSSimpleAssignStatement(CreateElement(TJSSimpleAssignStatement,El));
-      AssignSt.LHS:=LHS;
-      AssignSt.Expr:=AssignContext.RightSide;
-      AssignContext.RightSide:=nil;
-      Result:=AssignSt;
-      end;
+    Result:=CreateAssignStatement(Param0,AssignContext);
   finally
-    if Result=nil then
-      LHS.Free;
     AssignContext.RightSide.Free;
     AssignContext.Free;
   end;
@@ -3617,7 +3596,7 @@ end;
 
 function TPasToJSConverter.ConvertBuiltInSucc(El: TParamsExpr;
   AContext: TConvertContext): TJSElement;
-// pred(enumvalue) -> enumvalue-1
+// succ(enumvalue) -> enumvalue+1
 var
   ResolvedEl: TPasResolverResult;
   Param: TPasExpr;
@@ -3642,6 +3621,163 @@ begin
   DoError(20170210120626,nExpectedXButFoundY,sExpectedXButFoundY,['enum',GetResolverResultDescription(ResolvedEl)],Param);
 end;
 
+function TPasToJSConverter.ConvertBuiltInStrProc(El: TParamsExpr;
+  AContext: TConvertContext): TJSElement;
+// convert 'str(value,aString)' to 'aString = <string>'
+// for the conversion see ConvertBuiltInStrFunc
+var
+  AssignContext: TAssignContext;
+  StrVar: TPasExpr;
+begin
+  Result:=nil;
+  AssignContext:=TAssignContext.Create(El,nil,AContext);
+  try
+    StrVar:=El.Params[1];
+    AContext.Resolver.ComputeElement(StrVar,AssignContext.LeftResolved,[rcNoImplicitProc]);
+
+    // create right side
+    AssignContext.RightSide:=ConvertBuiltInStrParam(El.Params[0],AContext,true);
+    SetResolverValueExpr(AssignContext.RightResolved,btString,
+      AContext.Resolver.BaseType[btString],El,[rrfReadable]);
+
+    // create 'StrVar = rightside'
+    Result:=CreateAssignStatement(StrVar,AssignContext);
+  finally
+    AssignContext.RightSide.Free;
+    AssignContext.Free;
+  end;
+end;
+
+function TPasToJSConverter.ConvertBuiltInStrFunc(El: TParamsExpr;
+  AContext: TConvertContext): TJSElement;
+// convert 'str(boolean)' to '""+boolean'
+// convert 'str(integer)' to '""+integer'
+// convert 'str(float)' to '""+float'
+// convert 'str(float:width)' to rtl.spaceLeft('""+float,width)'
+// convert 'str(float:width:precision)' to 'rtl.spaceLeft(float.toFixed(precision),width)'
+var
+  i: Integer;
+  Param: TPasExpr;
+  Sum, Add: TJSElement;
+  AddEl: TJSAdditiveExpressionPlus;
+begin
+  {$IFDEF VerbosePas2JS}
+  writeln('TPasToJSConverter.ConvertBuiltInStrFunc Count=',length(El.Params));
+  {$ENDIF}
+  Result:=nil;
+  Sum:=nil;
+  Add:=nil;
+  try
+    for i:=0 to length(El.Params)-1 do
+      begin
+      Param:=El.Params[i];
+      Add:=ConvertBuiltInStrParam(Param,AContext,i=0);
+      if Sum=nil then
+        Sum:=Add
+      else
+        begin
+        AddEl:=TJSAdditiveExpressionPlus(CreateElement(TJSAdditiveExpressionPlus,Param));
+        AddEl.A:=Sum;
+        AddEl.B:=Add;
+        Sum:=AddEl;
+        end;
+      Add:=nil;
+      end;
+    Result:=Sum;
+  finally
+    Add.Free;
+    if Result=nil then
+      Sum.Free;
+  end;
+end;
+
+function TPasToJSConverter.ConvertBuiltInStrParam(El: TPasExpr;
+  AContext: TConvertContext; IsFirst: boolean): TJSElement;
+var
+  ResolvedEl: TPasResolverResult;
+  NeedStrLit: Boolean;
+  Add: TJSElement;
+  Call: TJSCallExpression;
+  PlusEl: TJSAdditiveExpressionPlus;
+  Bracket: TJSBracketMemberExpression;
+  procedure PrependStrLit;
+  begin
+    PlusEl:=TJSAdditiveExpressionPlus(CreateElement(TJSAdditiveExpressionPlus,El));
+    PlusEl.A:=CreateLiteralString(El,'');
+    PlusEl.B:=Add;
+    Add:=PlusEl;
+  end;
+
+begin
+  Result:=nil;
+  AContext.Resolver.ComputeElement(El,ResolvedEl,[]);
+  Add:=nil;
+  Call:=nil;
+  Bracket:=nil;
+  try
+    NeedStrLit:=false;
+    if ResolvedEl.BaseType in (btAllBooleans+btAllInteger) then
+      begin
+      NeedStrLit:=true;
+      Add:=ConvertElement(El,AContext);
+      end
+    else if ResolvedEl.BaseType in btAllFloats then
+      begin
+      NeedStrLit:=true;
+      Add:=ConvertElement(El,AContext);
+      if El.format2<>nil then
+        begin
+        // precision -> rtl El.toFixed(precision);
+        NeedStrLit:=false;
+        Call:=CreateCallExpression(El);
+        Call.Expr:=CreateDotExpression(El,Add,CreateBuiltInIdentifierExpr('toFixed'));
+        Call.Args.Elements.AddElement.Expr:=ConvertElement(El.format2,AContext);
+        Add:=Call;
+        Call:=nil;
+        end;
+      end
+    else if ResolvedEl.BaseType=btContext then
+      begin
+      if ResolvedEl.TypeEl.ClassType=TPasEnumType then
+        begin
+        // create enumtype[enumvalue]
+        Bracket:=TJSBracketMemberExpression(CreateElement(TJSBracketMemberExpression,El));
+        Bracket.MExpr:=CreateReferencePathExpr(TPasEnumType(ResolvedEl.TypeEl),AContext);
+        Bracket.Name:=ConvertElement(El,AContext);
+        Add:=Bracket;
+        Bracket:=nil;
+        end
+      else
+        RaiseNotSupported(El,AContext,20170320123827);
+      end
+    else
+      RaiseNotSupported(El,AContext,20170320093001);
+
+    if El.format1<>nil then
+      begin
+      // width -> leading spaces
+      if NeedStrLit then
+        PrependStrLit;
+      // create 'rtl.spaceLeft(add,width)'
+      Call:=CreateCallExpression(El);
+      Call.Expr:=CreateMemberExpression([VarNameRTL,FuncNameSpaceLeft]);
+      Call.Args.Elements.AddElement.Expr:=Add;
+      Add:=nil;
+      Call.Args.Elements.AddElement.Expr:=ConvertElement(El.format1,AContext);
+      Add:=Call;
+      Call:=nil;
+      end
+    else if IsFirst and NeedStrLit then
+      PrependStrLit;
+    Result:=Add;
+  finally
+    Call.Free;
+    Bracket.Free;
+    if Result=nil then
+      Add.Free;
+  end;
+end;
+
 function TPasToJSConverter.ConvertRecordValues(El: TRecordValues;
   AContext: TConvertContext): TJSElement;
 
@@ -3884,7 +4020,7 @@ begin
     if El.ElseBranch<>nil then
       begin
       JSCaseEl:=SwitchEl.Cases.AddCase;
-      JSCaseEl.Body:=ConvertImplBlockElements(El.ElseBranch,AContext);
+      JSCaseEl.Body:=ConvertImplBlockElements(El.ElseBranch,AContext,false);
       SwitchEl.TheDefault:=JSCaseEl;
       end;
     ok:=true;
@@ -4465,12 +4601,6 @@ begin
   until false;
 end;
 
-procedure TPasToJSConverter.SetTargetProcessor(const AValue: TPasToJsProcessor);
-begin
-  if FTargetProcessor=AValue then Exit;
-  FTargetProcessor:=AValue;
-end;
-
 constructor TPasToJSConverter.Create;
 begin
   FOptions:=[coLowerCase];
@@ -4497,6 +4627,8 @@ begin
   FFuncNameSet_Reference:=DefaultFuncNameSet_Reference;
   FFuncNameSet_SymDiffSet:=DefaultFuncNameSet_SymDiffSet;
   FFuncNameSet_Union:=DefaultFuncNameSet_Union;
+  FFuncNameSpaceLeft:=DefaultFuncNameSpaceLeft;
+  FVarNameExceptObject:=DefaultVarNameExceptObject;
   FVarNameImplementation:=DefaultVarNameImplementation;
   FVarNameLoopEnd:=DefaultVarNameLoopEnd;
   FVarNameModules:=DefaultVarNameModules;
@@ -4638,14 +4770,14 @@ begin
 end;
 
 function TPasToJSConverter.ConvertBeginEndStatement(El: TPasImplBeginBlock;
-  AContext: TConvertContext): TJSElement;
+  AContext: TConvertContext; NilIfEmpty: boolean): TJSElement;
 
 begin
-  Result:=ConvertImplBlockElements(El,AContext);
+  Result:=ConvertImplBlockElements(El,AContext,NilIfEmpty);
 end;
 
 function TPasToJSConverter.ConvertImplBlockElements(El: TPasImplBlock;
-  AContext: TConvertContext): TJSElement;
+  AContext: TConvertContext; NilIfEmpty: boolean): TJSElement;
 
 var
   First, Last: TJSStatementList;
@@ -4655,7 +4787,12 @@ var
 
 begin
   if Not (Assigned(El.Elements) and (El.Elements.Count>0)) then
-    Result:=TJSEmptyBlockStatement(CreateElement(TJSEmptyBlockStatement,El))
+    begin
+    if NilIfEmpty then
+      Result:=nil
+    else
+      Result:=TJSEmptyBlockStatement(CreateElement(TJSEmptyBlockStatement,El));
+    end
   else
     begin
     First:=nil;
@@ -4708,7 +4845,7 @@ begin
       Body:=FDS.AFunction.Body;
       FuncContext:=TFunctionContext.Create(El,Body,AContext);
       FuncContext.This:=AContext.GetThis;
-      Body.A:=ConvertImplBlockElements(El,FuncContext);
+      Body.A:=ConvertImplBlockElements(El,FuncContext,false);
       end;
     ok:=true;
   finally
@@ -4754,15 +4891,15 @@ begin
     if El.FinallyExcept is TPasImplTryFinally then
       begin
       T:=TJSTryFinallyStatement(CreateElement(TJSTryFinallyStatement,El));
-      T.Block:=ConvertImplBlockElements(El,AContext);
-      T.BFinally:=ConvertImplBlockElements(El.FinallyExcept,AContext);
+      T.Block:=ConvertImplBlockElements(El,AContext,true);
+      T.BFinally:=ConvertImplBlockElements(El.FinallyExcept,AContext,true);
       end
     else
       begin
       T:=TJSTryCatchStatement(CreateElement(TJSTryCatchStatement,El));
-      T.Block:=ConvertImplBlockElements(El,AContext);
+      T.Block:=ConvertImplBlockElements(El,AContext,true);
       if NeedExceptObject then
-        T.Ident:=TJSString(GetExceptionObjectName(AContext));
+        T.Ident:=TJSString(VarNameExceptObject);
       //T.BCatch:=ConvertElement(El.FinallyExcept,AContext);
       ExceptBlock:=El.FinallyExcept;
       if (ExceptBlock.Elements.Count>0)
@@ -4780,13 +4917,20 @@ begin
           Last:=IfSt;
           end;
         if El.ElseBranch<>nil then
-          Last.BFalse:=ConvertImplBlockElements(El.ElseBranch,AContext);
+          Last.BFalse:=ConvertImplBlockElements(El.ElseBranch,AContext,true)
+        else
+          begin
+          // default else: throw exceptobject
+          Last.BFalse:=TJSThrowStatement(CreateElement(TJSThrowStatement,El));
+          TJSThrowStatement(Last.BFalse).A:=
+            CreateBuiltInIdentifierExpr(VarNameExceptObject);
+          end;
         end
       else
         begin
         if El.ElseBranch<>nil then
           RaiseNotSupported(El.ElseBranch,AContext,20170205003014);
-        T.BCatch:=ConvertImplBlockElements(ExceptBlock,AContext);
+        T.BCatch:=ConvertImplBlockElements(ExceptBlock,AContext,true);
         end;
       end;
     Result:=T;
@@ -4925,7 +5069,7 @@ begin
         // Pascal 'else' or 'otherwise' -> create JS "else{}"
         if LastIfSt=nil then
           RaiseNotSupported(SubEl,AContext,20161128120802,'case-of needs at least one case');
-        LastIfSt.BFalse:=ConvertImplBlockElements(El.ElseBranch,AContext);
+        LastIfSt.BFalse:=ConvertImplBlockElements(El.ElseBranch,AContext,true);
         end
       else
         RaiseNotSupported(SubEl,AContext,20161128113055);
@@ -5170,6 +5314,34 @@ begin
   end;
 end;
 
+function TPasToJSConverter.CreateAssignStatement(LeftEl: TPasElement;
+  AssignContext: TAssignContext): TJSElement;
+var
+  LHS: TJSElement;
+  AssignSt: TJSSimpleAssignStatement;
+begin
+  Result:=nil;
+  LHS:=ConvertElement(LeftEl,AssignContext);
+  if AssignContext.Call<>nil then
+    begin
+    // has a setter -> right side was already added as parameter
+    if AssignContext.RightSide<>nil then
+      begin
+      LHS.Free;
+      RaiseInconsistency(20170207215447);
+      end;
+    Result:=LHS;
+    end
+  else
+    begin
+    AssignSt:=TJSSimpleAssignStatement(CreateElement(TJSSimpleAssignStatement,AssignContext.PasElement));
+    AssignSt.LHS:=LHS;
+    AssignSt.Expr:=AssignContext.RightSide;
+    AssignContext.RightSide:=nil;
+    Result:=AssignSt;
+    end;
+end;
+
 function TPasToJSConverter.ConvertImplBlock(El: TPasImplBlock;
   AContext: TConvertContext): TJSElement;
 
@@ -5182,7 +5354,7 @@ begin
   else if (El.ClassType=TPasImplRepeatUntil) then
     Result:=ConvertRepeatStatement(TPasImplRepeatUntil(El),AContext)
   else if (El.ClassType=TPasImplBeginBlock) then
-    Result:=ConvertBeginEndStatement(TPasImplBeginBlock(El),AContext)
+    Result:=ConvertBeginEndStatement(TPasImplBeginBlock(El),AContext,true)
   else if (El.ClassType=TInitializationSection) then
     Result:=ConvertInitializationSection(TInitializationSection(El),AContext)
   else if (El.ClassType=TFinalizationSection) then
@@ -5295,7 +5467,7 @@ begin
   if El.ExceptObject<>Nil then
     E:=ConvertElement(El.ExceptObject,AContext)
   else
-    E:=CreateBuiltInIdentifierExpr(GetExceptionObjectName(AContext));
+    E:=CreateBuiltInIdentifierExpr(VarNameExceptObject);
   T:=TJSThrowStatement(CreateElement(TJSThrowStatement,El));
   T.A:=E;
   Result:=T;
@@ -5430,9 +5602,7 @@ begin
   try
     C:=ConvertElement(El.ConditionExpr,AContext);
     if Assigned(El.IfBranch) then
-      BThen:=ConvertElement(El.IfBranch,AContext)
-    else
-      BThen:=TJSEmptyBlockStatement(CreateElement(TJSEmptyBlockStatement,El));
+      BThen:=ConvertElement(El.IfBranch,AContext);
     if Assigned(El.ElseBranch) then
       BElse:=ConvertElement(El.ElseBranch,AContext);
     ok:=true;
@@ -5502,7 +5672,7 @@ begin
     C:=ConvertElement(EL.ConditionExpr,AContext);
     N:=TJSUnaryNotExpression(CreateElement(TJSUnaryNotExpression,EL.ConditionExpr));
     N.A:=C;
-    B:=ConvertImplBlockElements(El,AContext);
+    B:=ConvertImplBlockElements(El,AContext,false);
     ok:=true;
   finally
     if not ok then
@@ -5734,11 +5904,6 @@ begin
         begin
         B:=ConvertElement(El.Body,AContext);
         AddToStatementList(FirstSt,LastSt,B,El.Body);
-        end
-      else
-        begin
-        B:=TJSEmptyBlockStatement(CreateElement(TJSEmptyBlockStatement,El));
-        AddToStatementList(FirstSt,LastSt,B,El);
         end;
       Result:=FirstSt;
     finally
@@ -5779,15 +5944,6 @@ begin
     end;
 end;
 
-function TPasToJSConverter.GetExceptionObjectName(AContext: TConvertContext
-  ): string;
-begin
-  if AContext=nil then ;
-  Result:=DefaultJSExceptionObject; // use the same as the FPC RTL
-  if UseLowerCase then
-    Result:=lowercase(Result);
-end;
-
 function TPasToJSConverter.IsElementUsed(El: TPasElement): boolean;
 begin
   if Assigned(OnIsElementUsed) then
@@ -6789,7 +6945,7 @@ begin
     // create "T.isPrototypeOf(exceptObject)"
     Call:=CreateCallExpression(El);
     Call.Expr:=DotExpr;
-    Call.Args.Elements.AddElement.Expr:=CreateBuiltInIdentifierExpr(GetExceptionObjectName(AContext));
+    Call.Args.Elements.AddElement.Expr:=CreateBuiltInIdentifierExpr(VarNameExceptObject);
     IfSt.Cond:=Call;
 
     if El.VarEl<>nil then
@@ -6803,11 +6959,11 @@ begin
       VarDecl:=TJSVarDeclaration(CreateElement(TJSVarDeclaration,El));
       V.A:=VarDecl;
       VarDecl.Name:=TransformVariableName(El,El.VariableName,AContext);
-      VarDecl.Init:=CreateBuiltInIdentifierExpr(GetExceptionObjectName(AContext));
+      VarDecl.Init:=CreateBuiltInIdentifierExpr(VarNameExceptObject);
       // add statements
       AddToStatementList(ListFirst,ListLast,ConvertElement(El.Body,AContext),El);
       end
-    else
+    else if El.Body<>nil then
       // add statements
       IfSt.BTrue:=ConvertElement(El.Body,AContext);
 
@@ -7360,7 +7516,6 @@ begin
   Result:=true;
   if aName=VarNameModules then exit;
   if aName=VarNameRTL then exit;
-  if aName=GetExceptionObjectName(nil) then exit;
 
   l:=low(JSReservedWords);
   r:=high(JSReservedWords);
@@ -7387,7 +7542,10 @@ begin
   aContext:=TRootContext.Create(El,nil,nil);
   try
     aContext.Resolver:=Resolver;
-    Result:=ConvertElement(El,aContext);
+    if (El.ClassType=TPasImplBeginBlock) then
+      Result:=ConvertBeginEndStatement(TPasImplBeginBlock(El),AContext,false)
+    else
+      Result:=ConvertElement(El,aContext);
   finally
     FreeAndNil(aContext);
   end;

packages/pastojs/tests/tcconverter.pp

@@ -187,8 +187,8 @@ begin
   R:=TPasImplIfElse.Create('',Nil);
   R.ConditionExpr:=CreateCondition;
   E:=TJSIfStatement(Convert(R,TJSIfStatement));
-  AssertEquals('If branch is empty block statement',TJSEmptyBlockStatement,E.btrue.ClassType);
-  AssertNull('No else branch',E.bfalse);
+  AssertNull('If branch is empty',E.BTrue);
+  AssertNull('No else branch',E.BFalse);
   AssertIdentifier('Left hand side OK',E.Cond,'a');
 end;
 
@@ -668,7 +668,7 @@ begin
   // Convert
   El:=TJSTryCatchStatement(Convert(T,TJSTryCatchStatement));
   // check "catch(exceptobject)"
-  AssertEquals('Correct exception object name',lowercase(DefaultJSExceptionObject),String(El.Ident));
+  AssertEquals('Correct exception object name',lowercase(DefaultVarNameExceptObject),String(El.Ident));
   // check "if"
   I:=TJSIfStatement(AssertElement('On block is if',TJSIfStatement,El.BCatch));
   // check if condition "exception.isPrototypeOf(exceptobject)"
@@ -679,14 +679,14 @@ begin
   AssertNotNull('args of exception.isPrototypeOf(exceptobject)',IC.Args);
   AssertEquals('args of exception.isPrototypeOf(exceptobject)',1,IC.Args.Elements.Count);
   ExObj:=IC.Args.Elements.Elements[0].Expr;
-  Assertidentifier('arg of exception.isPrototypeOf(exceptobject)',ExObj,lowercase(DefaultJSExceptionObject));
+  Assertidentifier('arg of exception.isPrototypeOf(exceptobject)',ExObj,lowercase(DefaultVarNameExceptObject));
   // check statement "var e = exceptobject;"
   L:=AssertListStatement('On block is always a list',I.BTrue);
   writeln('TTestStatementConverter.TestTryExceptStatementOnE ',L.A.ClassName);
   VS:=TJSVariableStatement(AssertElement('First statement in list is a var statement',TJSVariableStatement,L.A));
   V:=TJSVarDeclaration(AssertElement('var declaration e=ExceptObject',TJSVarDeclaration,VS.A));
   AssertEquals('Variable name is identifier in On A : Ex do','e',V.Name);
-  Assertidentifier('Variable init is exception object',V.Init,lowercase(DefaultJSExceptionObject));
+  Assertidentifier('Variable init is exception object',V.Init,lowercase(DefaultVarNameExceptObject));
   // check "b = c;"
   AssertAssignStatement('Original assignment in second statement',L.B,'b','c');
 end;
@@ -727,7 +727,7 @@ begin
   // Convert
   El:=TJSTryCatchStatement(Convert(T,TJSTryCatchStatement));
   // check "catch(exceptobject)"
-  AssertEquals('Correct exception object name',lowercase(DefaultJSExceptionObject),String(El.Ident));
+  AssertEquals('Correct exception object name',lowercase(DefaultVarNameExceptObject),String(El.Ident));
   // check "if"
   I:=TJSIfStatement(AssertElement('On block is if',TJSIfStatement,El.BCatch));
   // check if condition "exception.isPrototypeOf(exceptobject)"
@@ -738,16 +738,16 @@ begin
   AssertNotNull('args of exception.isPrototypeOf(ExceptObject)',IC.Args);
   AssertEquals('args of exception.isPrototypeOf(ExceptObject)',1,IC.Args.Elements.Count);
   ExObj:=IC.Args.Elements.Elements[0].Expr;
-  Assertidentifier('arg of exception.isPrototypeOf(ExceptObject)',ExObj,lowercase(DefaultJSExceptionObject));
+  Assertidentifier('arg of exception.isPrototypeOf(ExceptObject)',ExObj,lowercase(DefaultVarNameExceptObject));
   // check statement "var e = exceptobject;"
   L:=AssertListStatement('On block is always a list',I.BTrue);
   writeln('TTestStatementConverter.TestTryExceptStatementOnE ',L.A.ClassName);
   VS:=TJSVariableStatement(AssertElement('First statement in list is a var statement',TJSVariableStatement,L.A));
   V:=TJSVarDeclaration(AssertElement('var declaration e=ExceptObject',TJSVarDeclaration,VS.A));
   AssertEquals('Variable name is identifier in On A : Ex do','e',V.Name);
-  Assertidentifier('Variable init is exception object',V.Init,lowercase(DefaultJSExceptionObject));
+  Assertidentifier('Variable init is exception object',V.Init,lowercase(DefaultVarNameExceptObject));
   R:=TJSThrowStatement(AssertElement('On block is throw statement',TJSThrowStatement,L.B));
-  Assertidentifier('R expression is original exception ',R.A,lowercase(DefaultJSExceptionObject));
+  Assertidentifier('R expression is original exception ',R.A,lowercase(DefaultVarNameExceptObject));
 end;
 
 Procedure TTestStatementConverter.TestVariableStatement;

packages/pastojs/tests/tcmodules.pas

@@ -164,6 +164,7 @@ type
     Procedure TestString_Compare;
     Procedure TestString_SetLength;
     Procedure TestString_CharAt;
+    Procedure TestStr;
 
     // alias types
     Procedure TestAliasTypeRef;
@@ -211,6 +212,7 @@ type
     Procedure TestSet_Property;
 
     // statements
+    Procedure TestNestBegin;
     Procedure TestIncDec;
     Procedure TestAssignments;
     Procedure TestArithmeticOperators1;
@@ -458,7 +460,7 @@ begin
             +' Col='+IntToStr(CurEngine.Scanner.CurColumn)
             +' Line="'+CurEngine.Scanner.CurLine+'"'
             );
-          raise E;
+          Fail(E.Message);
           end;
       end;
       //writeln('TTestModule.OnPasResolverFindUnit END ',CurUnitName);
@@ -467,7 +469,7 @@ begin
       end;
     end;
   writeln('TTestModule.OnPasResolverFindUnit missing unit "',aUnitName,'"');
-  raise Exception.Create('can''t find unit "'+aUnitName+'"');
+  Fail('can''t find unit "'+aUnitName+'"');
 end;
 
 procedure TCustomTestModule.SetUp;
@@ -547,7 +549,7 @@ begin
         +' '+E.Filename+'('+IntToStr(E.Row)+','+IntToStr(E.Column)+')'
         +' Line="'+Scanner.CurLine+'"'
         );
-      raise E;
+      Fail(E.Message);
       end;
     on E: EPasResolve do
       begin
@@ -556,12 +558,12 @@ begin
       writeln('ERROR: TTestModule.ParseModule PasResolver: '+E.ClassName+':'+E.Message
         +' '+E.PasElement.SourceFilename
         +'('+IntToStr(Row)+','+IntToStr(Col)+')');
-      raise E;
+      Fail(E.Message);
       end;
     on E: Exception do
       begin
       writeln('ERROR: TTestModule.ParseModule Exception: '+E.ClassName+':'+E.Message);
-      raise E;
+      Fail(E.Message);
       end;
   end;
   AssertNotNull('Module resulted in Module',FModule);
@@ -609,7 +611,7 @@ function TCustomTestModule.AddModule(aFilename: string
 begin
   //writeln('TTestModuleConverter.AddModule ',aFilename);
   if FindModuleWithFilename(aFilename)<>nil then
-    raise Exception.Create('TTestModuleConverter.AddModule: file "'+aFilename+'" already exists');
+    Fail('TTestModuleConverter.AddModule: file "'+aFilename+'" already exists');
   Result:=TTestEnginePasResolver.Create;
   Result.Filename:=aFilename;
   Result.AddObjFPCBuiltInIdentifiers([btChar,btString,btLongint,btInt64,btBoolean,btDouble]);
@@ -695,14 +697,14 @@ begin
       writeln('ERROR: TTestModule.ConvertModule Scanner: '+E.ClassName+':'+E.Message
         +' '+Scanner.CurFilename
         +'('+IntToStr(Scanner.CurRow)+','+IntToStr(Scanner.CurColumn)+')');
-      raise E;
+      Fail(E.Message);
     end;
     on E: EParserError do begin
       WriteSource(Scanner.CurFilename,Scanner.CurRow,Scanner.CurColumn);
       writeln('ERROR: TTestModule.ConvertModule Parser: '+E.ClassName+':'+E.Message
         +' '+Scanner.CurFilename
         +'('+IntToStr(Scanner.CurRow)+','+IntToStr(Scanner.CurColumn)+')');
-      raise E;
+      Fail(E.Message);
     end;
     on E: EPasResolve do
       begin
@@ -711,7 +713,7 @@ begin
       writeln('ERROR: TTestModule.ConvertModule PasResolver: '+E.ClassName+':'+E.Message
         +' '+E.PasElement.SourceFilename
         +'('+IntToStr(Row)+','+IntToStr(Col)+')');
-      raise E;
+      Fail(E.Message);
       end;
     on E: EPas2JS do
       begin
@@ -725,12 +727,12 @@ begin
         end
       else
         writeln('ERROR: TTestModule.ConvertModule Exception: '+E.ClassName+':'+E.Message);
-      raise E;
+      Fail(E.Message);
       end;
     on E: Exception do
       begin
       writeln('ERROR: TTestModule.ConvertModule Exception: '+E.ClassName+':'+E.Message);
-      raise E;
+      Fail(E.Message);
       end;
   end;
   FJSSource:=TStringList.Create;
@@ -1526,8 +1528,7 @@ begin
     '  this.FuncA(Bar);',
     '};',
     'this.FuncA = function (Bar) {',
-    '  if (Bar == 3) {',
-    '  };',
+    '  if (Bar == 3);',
     '};'
     ]),
     LinesToStr([
@@ -1563,8 +1564,7 @@ begin
     '    FuncB(i);',
     '  };',
     '  function FuncB(i) {',
-    '    if (i == 3) {',
-    '    };',
+    '    if (i == 3);',
     '  };',
     '  FuncC(4);',
     '};'
@@ -1628,12 +1628,9 @@ begin
      'this.i = 0;'
     ]),
     LinesToStr([
-    'if (this.Func2()) {',
-    '};',
-    'if (this.i == this.Func1()) {',
-    '};',
-    'if (this.i == this.Func1()) {',
-    '};'
+    'if (this.Func2());',
+    'if (this.i == this.Func1());',
+    'if (this.i == this.Func1());'
     ]));
 end;
 
@@ -2230,6 +2227,7 @@ begin
   Add('var');
   Add('  e: TMyEnum;');
   Add('  i: longint;');
+  Add('  s: string;');
   Add('begin');
   Add('  i:=ord(red);');
   Add('  i:=ord(green);');
@@ -2244,6 +2242,9 @@ begin
   Add('  e:=succ(e);');
   Add('  e:=tmyenum(1);');
   Add('  e:=tmyenum(i);');
+  Add('  s:=str(e);');
+  Add('  str(e,s)');
+  Add('  s:=str(e:3);');
   ConvertProgram;
   CheckSource('TestEnumNumber',
     LinesToStr([ // statements
@@ -2254,7 +2255,8 @@ begin
     '  Green:1',
     '  };',
     'this.e = 0;',
-    'this.i = 0;'
+    'this.i = 0;',
+    'this.s = "";'
     ]),
     LinesToStr([
     'this.i=this.TMyEnum.Red;',
@@ -2270,6 +2272,9 @@ begin
     'this.e=this.e+1;',
     'this.e=1;',
     'this.e=this.i;',
+    'this.s = this.TMyEnum[this.e];',
+    'this.s = this.TMyEnum[this.e];',
+    'this.s = rtl.spaceLeft(this.TMyEnum[this.e], 3);',
     '']));
 end;
 
@@ -2687,6 +2692,23 @@ begin
     '']));
 end;
 
+procedure TTestModule.TestNestBegin;
+begin
+  StartProgram(false);
+  Add('begin');
+  Add('  begin');
+  Add('    begin');
+  Add('    end;');
+  Add('    begin');
+  Add('      if true then ;');
+  Add('    end;');
+  Add('  end;');
+  ConvertProgram;
+  CheckSource('TestNestBegin',
+    '',
+    'if (true) ;');
+end;
+
 procedure TTestModule.TestUnitImplVars;
 begin
   StartUnit(false);
@@ -3103,6 +3125,55 @@ begin
     '']));
 end;
 
+procedure TTestModule.TestStr;
+begin
+  StartProgram(false);
+  Add('var');
+  Add('  b: boolean;');
+  Add('  i: longint;');
+  Add('  d: double;');
+  Add('  s: string;');
+  Add('begin');
+  Add('  s:=str(b);');
+  Add('  s:=str(i);');
+  Add('  s:=str(d);');
+  Add('  s:=str(i,i);');
+  Add('  s:=str(i:3);');
+  Add('  s:=str(d:3:2);');
+  Add('  s:=str(i:4,i);');
+  Add('  s:=str(i,i:5);');
+  Add('  s:=str(i:4,i:5);');
+  Add('  str(b,s);');
+  Add('  str(i,s);');
+  Add('  str(d,s);');
+  Add('  str(i:3,s);');
+  Add('  str(d:3:2,s);');
+  ConvertProgram;
+  CheckSource('TestStr',
+    LinesToStr([ // statements
+    'this.b = false;',
+    'this.i = 0;',
+    'this.d = 0.0;',
+    'this.s = "";',
+    '']),
+    LinesToStr([ // this.$main
+    'this.s = ""+this.b;',
+    'this.s = ""+this.i;',
+    'this.s = ""+this.d;',
+    'this.s = (""+this.i)+this.i;',
+    'this.s = rtl.spaceLeft(""+this.i,3);',
+    'this.s = rtl.spaceLeft(this.d.toFixed(2),3);',
+    'this.s = rtl.spaceLeft("" + this.i, 4) + this.i;',
+    'this.s = ("" + this.i) + rtl.spaceLeft("" + this.i, 5);',
+    'this.s = rtl.spaceLeft("" + this.i, 4) + rtl.spaceLeft("" + this.i, 5);',
+    'this.s = ""+this.b;',
+    'this.s = ""+this.i;',
+    'this.s = ""+this.d;',
+    'this.s = rtl.spaceLeft(""+this.i,3);',
+    'this.s = rtl.spaceLeft(this.d.toFixed(2),3);',
+    '']));
+end;
+
 procedure TTestModule.TestProcTwoArgs;
 begin
   StartProgram(false);
@@ -3290,7 +3361,7 @@ begin
     '  var $loopend1 = 2;',
     '  for (this.vI = 1; this.vI <= $loopend1; this.vI++);',
     '  if(this.vI>$loopend1)this.vI--;',
-    '  if (this.vI==3){} ;'
+    '  if (this.vI==3) ;'
     ]));
 end;
 
@@ -3389,7 +3460,7 @@ begin
     LinesToStr([ // this.$main
     'this.vI = 1;',
     'if (vI==1) {',
-    'vI=2;',
+    '  vI=2;',
     '}',
     'if (vI==2){ vI=3; }',
     ';',
@@ -3452,6 +3523,11 @@ begin
   Add('    else');
   Add('      vi:=5');
   Add('  end;');
+  Add('  try');
+  Add('    VI:=6;');
+  Add('  except');
+  Add('    on einvalidcast do ;');
+  Add('  end;');
   ConvertProgram;
   CheckSource('TestTryExcept',
     LinesToStr([ // statements
@@ -3479,21 +3555,27 @@ begin
     '};',
     'try {',
     '  this.vI = 3;',
-    '} catch ('+DefaultJSExceptionObject+') {',
-    '  throw '+DefaultJSExceptionObject+';',
+    '} catch ('+DefaultVarNameExceptObject+') {',
+    '  throw '+DefaultVarNameExceptObject+';',
     '};',
     'try {',
     '  this.vI = 4;',
-    '} catch ('+DefaultJSExceptionObject+') {',
-    '  if (this.EInvalidCast.isPrototypeOf('+DefaultJSExceptionObject+')) throw '+DefaultJSExceptionObject,
-    '  else if (this.Exception.isPrototypeOf('+DefaultJSExceptionObject+')) {',
-    '    var E = '+DefaultJSExceptionObject+';',
+    '} catch ('+DefaultVarNameExceptObject+') {',
+    '  if (this.EInvalidCast.isPrototypeOf('+DefaultVarNameExceptObject+')) throw '+DefaultVarNameExceptObject,
+    '  else if (this.Exception.isPrototypeOf('+DefaultVarNameExceptObject+')) {',
+    '    var E = '+DefaultVarNameExceptObject+';',
     '    if (E.Msg == "") throw E;',
     '  } else {',
     '    this.vI = 5;',
     '  }',
-    '};'
-    ]));
+    '};',
+    'try {',
+    '  this.vI = 6;',
+    '} catch ('+DefaultVarNameExceptObject+') {',
+    '  if (this.EInvalidCast.isPrototypeOf('+DefaultVarNameExceptObject+')){' ,
+    '  } else throw '+DefaultVarNameExceptObject,
+    '};',
+    '']));
 end;
 
 procedure TTestModule.TestCaseOf;
@@ -3614,8 +3696,7 @@ begin
     ]),
     LinesToStr([ // this.$main
     'var $tmp1 = this.vI;',
-    'if (($tmp1 >= 1) && ($tmp1 <= 3)) this.vI = 14 else if (($tmp1 == 4) || ($tmp1 == 5)) this.vI = 16 else if ((($tmp1 >= 6) && ($tmp1 <= 7)) || (($tmp1 >= 9) && ($tmp1 <= 10))) {} else {',
-    '};'
+    'if (($tmp1 >= 1) && ($tmp1 <= 3)) this.vI = 14 else if (($tmp1 == 4) || ($tmp1 == 5)) this.vI = 16 else if ((($tmp1 >= 6) && ($tmp1 <= 7)) || (($tmp1 >= 9) && ($tmp1 <= 10))) ;'
     ]));
 end;
 
@@ -3674,8 +3755,8 @@ begin
     ]),
     LinesToStr([ // this.$main
     'this.Arr = [];',
-    'if (this.Arr.length == 0) {};',
-    'if (0 == this.Arr.length) {};',
+    'if (this.Arr.length == 0);',
+    'if (0 == this.Arr.length);',
     'this.DoIt([],[]);',
     '']));
 end;
@@ -3714,8 +3795,8 @@ begin
     ]),
     LinesToStr([ // this.$main
     'this.Arr2 = [];',
-    'if (this.Arr2.length == 0) {};',
-    'if (0 == this.Arr2.length) {};',
+    'if (this.Arr2.length == 0);',
+    'if (0 == this.Arr2.length);',
     'this.i = 0;',
     'this.i = 0;',
     'this.i = this.Arr2.length-1;',
@@ -4735,8 +4816,7 @@ begin
     'this.oO = this.TObject.$create("Create");',
     'this.oA = this.TClassA.$create("Create");',
     'this.oB = this.TClassB.$create("Create");',
-    'if (this.TClassA.isPrototypeOf(this.oO)) {',
-    '};',
+    'if (this.TClassA.isPrototypeOf(this.oO));',
     'this.oB = rtl.as(this.oO, this.TClassB);',
     'rtl.as(this.oO, this.TClassB).ProcB();'
     ]));
@@ -5065,7 +5145,7 @@ begin
     LinesToStr([ // this.$main
     'this.Obj = this.TObject.$create("Create");',
     'this.TObject.vI = 3;',
-    'if (this.TObject.vI == 4){};',
+    'if (this.TObject.vI == 4);',
     'this.TObject.Sub=null;',
     'this.Obj.$class.Sub=null;',
     'this.Obj.Sub.$class.Sub=null;',
@@ -5225,8 +5305,7 @@ begin
     ]),
     LinesToStr([ // this.$main
     'this.Obj.Fy = this.Obj.Fx + 1;',
-    'if (this.Obj.GetInt() == 2) {',
-    '};',
+    'if (this.Obj.GetInt() == 2);',
     'this.Obj.SetInt(this.Obj.GetInt() + 2);',
     'this.Obj.SetInt(this.Obj.Fx);'
     ]));
@@ -5297,13 +5376,11 @@ begin
     ]),
     LinesToStr([ // this.$main
     'this.TObject.Fy = this.TObject.Fx + 1;',
-    'if (this.TObject.GetInt() == 2) {',
-    '};',
+    'if (this.TObject.GetInt() == 2);',
     'this.TObject.SetInt(this.TObject.GetInt() + 2);',
     'this.TObject.SetInt(this.TObject.Fx);',
     'this.Obj.$class.Fy = this.Obj.Fx + 1;',
-    'if (this.Obj.$class.GetInt() == 2) {',
-    '};',
+    'if (this.Obj.$class.GetInt() == 2);',
     'this.Obj.$class.SetInt(this.Obj.$class.GetInt() + 2);',
     'this.Obj.$class.SetInt(this.Obj.Fx);'
     ]));
@@ -5568,8 +5645,7 @@ begin
     'this.b = false;'
     ]),
     LinesToStr([ // this.$main
-    'if (this.Obj != null) {',
-    '};',
+    'if (this.Obj != null);',
     'this.b = (this.Obj != null) || false;'
     ]));
 end;
@@ -5921,24 +5997,18 @@ begin
     'this.ProcA = function (A) {',
     '  A.set(null);',
     '  A.set(A.get());',
-    '  if (A.get() == null) {',
-    '  };',
-    '  if (null == A.get()) {',
-    '  };',
+    '  if (A.get() == null);',
+    '  if (null == A.get());',
     '};',
     'this.ProcB = function (A) {',
     '  A.set(null);',
     '  A.set(A.get());',
-    '  if (A.get() == null) {',
-    '  };',
-    '  if (null == A.get()) {',
-    '  };',
+    '  if (A.get() == null);',
+    '  if (null == A.get());',
     '};',
     'this.ProcC = function (A) {',
-    '  if (A == null) {',
-    '  };',
-    '  if (null == A) {',
-    '  };',
+    '  if (A == null);',
+    '  if (null == A);',
     '};',
     'this.o = null;',
     '']),

packages/pastojs/tests/tcoptimizations.pas

@@ -529,8 +529,7 @@ begin
     'this.o = null;',
     '']),
     LinesToStr([
-    'if (this.o.FFoo){',
-    '};',
+    'if (this.o.FFoo);',
     '']));
 end;
 
@@ -566,8 +565,7 @@ begin
     'this.o = null;',
     '']),
     LinesToStr([
-    'if (this.o.GetFoo()){',
-    '};',
+    'if (this.o.GetFoo()) ;',
     '']));
 end;