Check-in [3d61c6fe53]
Overview
SHA1:3d61c6fe53bb2dc412187dd18ec9a28fdbe70911
Date: 2013-11-20 20:58:57
User: suchenwi
Comment:added [catch]
Timelines: family | ancestors | descendants | both | trunk
Downloads: Tarball | ZIP archive
Other Links: files | file ages | folders | manifest
Tags And Properties
Context
2013-11-23
21:28
[4f3db7f982] added several file commands, fixed backslash substitutions (user: suchenwi, tags: trunk)
2013-11-20
20:58
[3d61c6fe53] added [catch] (user: suchenwi, tags: trunk)
2013-11-19
20:21
[c9965b6d9d] now passing all 105 tests (user: suchenwi, tags: trunk)
Changes

Modified tcl053.js from [7793cfca8e] to [368d355e33].

98
99
100
101
102
103
104
105
106
107
108
109

110
111
112
113
114
115
116
...
179
180
181
182
183
184
185









186
187
188
189
190
191
192
...
674
675
676
677
678
679
680

681
682
683
684
685
686
687
688
689
690

691
692
693
694
695
696
697
698
699
700
701
702
703
704

705
706
707
708
709
710
711
712
...
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
....
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
....
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
....
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
....
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
....
1279
1280
1281
1282
1283
1284
1285
1286
1287

1288
1289
1290
1291
1292
1293
1294
1295
....
1323
1324
1325
1326
1327
1328
1329

1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
....
1346
1347
1348
1349
1350
1351
1352

1353
1354
1355
1356
1357
1358

1359
1360
1361
1362
1363
1364
1365
    }
    this.eval = function (code) {
      try {
	return this.eval2(code);
      } catch (e) {
	var msg = code.substr(0,128);
	if(msg.length >= 125) msg += "...";
	puts(e);
	var msg = e+'\n        while executing\n"'+msg+'"';
	for(var i = this.level; i > 0; i--)
	  msg += '\n        invoked from within\n"'+this.levelcall[i]+'"'
	this.setVar("::errorInfo", msg);

      }
    }
    this.eval2 = function(code) {
      this.code  = this.OK;
      var parser = new TclParser(code);
      var args   = [];
      var first  = true;
................................................................................
	for (var i = 2; i < args.length; i++) str += args[i].toString();
        interp.setVar(vname, str);
        return str;
      });
    this.registerCommand("break", function (interp, args) {
        interp.code = interp.BRK;
        return;









      });
    this.registerCommand("cd", function (interp, args) {
	this.arity(args, 1, 2);
	var dir = process.env.HOME;
	if (args.length == 2) dir = args[1].toString();
	process.chdir(dir);
	return;
................................................................................
        var r = args[1];
        interp.code = interp.RET;
        return r;
    });
    this.registerCommand("set", function (interp, args) {
        this.arity(args, 2, 3);
        var name = args[1];

        if (args.length == 3) interp.setVar(name, args[2]);
        return interp.getVar(name);
    });
    this.registerCommand("source", function (interp, args) {
        this.arity(args, 2);
        interp.script = args[1].toString();
        try {
	  var data = fs.readFileSync(interp.script).toString();
        } catch(e) {
	  throw 'couldn\' read file "'+interp.script+'": no such file or directory';}

	var res    = interp.eval(data);
	interp.script = "";
	return res;
      });
    this.registerCommand("split", function (interp, args) {
        this.arity(args, 2, 3);
        var str = args[1].toString();
        var sep = " ";
        if (args.length == 3) sep = args[2].toString();
	var res = [], e;
        var tmp = str.split(sep);
	for(var i in tmp) {
	  e = tmp[i];
	  if(e == "") e = "{}";

	  res.push(e);
	}
	return res.join(" ");
      });
    this.registerSubCommand("string", "compare", function (interp, args) {
        this.arity(args, 3);
	var a = args[1].toString();
	var b = args[2].toString();
................................................................................
	  return;
        }
        base = cmd[0].toString();
        cmd.shift();
        interp.registerSubCommand(base, cmd.join(" "), eval(args[2].toString()));
        return;
      });
    this.math = function (name, a, b) {
      switch (name) {
      case "+":  return a + b;
      case "-":  return a - b;
      case "*":  return a * b;
      case "/":  return a / b;
      case "%":  return a % b;
      case "<":  return a < b? "1":"0";
      case ">":  return a > b? "1":"0";
      case "==": return a == b? "1":"0";
      case "!=": return a != b? "1":"0";
      default:   throw "Unknown operator: '"+name+"'";
      }
    }
    var ops = ["+","-","*","/","%","<",">","==","!="];
    for (var i in ops)
      this.registerCommand(ops[i],function (interp, args) {
	  this.arity(args, 3);
	  var name = args[0].toString();
	  var a    = interp.objectify(args[1]);
	  var b    = interp.objectify(args[2]);
	  if (name == '==') 
	    return new TclObject(a.toString() == b.toString()?"1":"0","BOOL");
	  if (name == '!=') 
	    return new TclObject(a.toString() != b.toString()?"1":"0","BOOL");
	  
	  var x = a.getNumber();
	  var y = b.getNumber();
	  if (a.isInteger() && b.isInteger())
	    return new TclObject(interp.math(name, x, y),"INTEGER");
	  if (a.isReal() && b.isReal())
	    return new TclObject(interp.math(name, x, y),"REAL");
	  return new TclObject(interp.math(name, args[1].toString(), 
					   args[2].toString()));
        });
    this.mkList = function(x) {
      var list = [];
      for (var name in x) {list.push(name);}
      return list;
    }
    this.objectify = function (text) {
      if (text == null) text = "";
................................................................................
  this.SEP = 0;
  this.STR = 1;
  this.EOL = 2;
  this.EOF = 3;
  this.ESC = 4;
  this.CMD = 5;
  this.VAR = 6;
  this.text  = text;
  this.start = 0;
  this.end   = 0;
  this.insidequote = false;
  this.index = 0;
  this.len = text.length;
  this.type = this.EOL;
  this.cur = this.text.charAt(0);
  this.getText = function () {
    return this.text.substring(this.start,this.end+1);
  }
  this.parseString = function () {
    var newword = (this.type==this.SEP ||
		   this.type == this.EOL || this.type == this.STR);
    if (newword && this.cur == "{") return this.parseBrace();
    else if (newword && this.cur == '"') {
................................................................................
    this.start = this.index;
    while (true) {
      if (this.len == 0) {
	this.end = this.index-1;
	this.type = this.ESC;
	return this.OK;
      }
      if (this.cur == "\\") {
	//if (this.len >= 2) this.feedSequence();
      }
      else if ("$[ \t\n\r;".indexOf(this.cur)>=0) {
	if ("$[".indexOf(this.cur)>=0 || !this.insidequote) {
	  this.end = this.index-1;
	  this.type = this.ESC;
	  return this.OK;
	}
      }
      else if (this.cur == '"' && this.insidequote) {
	this.end    = this.index-1;
	this.type = this.ESC;
	this.feedchar();
	this.insidequote = false;
	return this.OK;
      }
      this.feedchar();
    }
................................................................................
    while (true) {
      if (this.len == 0) {
	this.end  = this.index;
	this.type = this.EOL;
	return;
      }
      switch (this.cur) {
      case "\\":
	if (this.len >= 2) this.feedSequence();
	break;
      case " ": case "\t": case "\n": case "\r":
	if (level > 0) break;
	this.end  = this.index - 1;
	this.type = this.SEP;
	this.feedchar();
	return;
      case '{': level++; break;
................................................................................
    while (true) {
      if (this.len == 0) break;
      if (this.cur == "[" && blevel == 0)
	level++;
      else if (this.cur == "]" && blevel == 0) {
	level--;
	if (level == 0) break;
      } else if (this.cur == "\\") {
	this.feedSequence();
      } else if (this.cur == "{") {
	blevel++;
      } else if (this.cur == "}") {
	if (blevel != 0) blevel--;
      }
      this.feedchar();
    }
................................................................................
    this.setPos(this.end+1);
    return this.OK;
  }
  this.parseBrace = function () {
    var level = 1;
    this.feedcharstart();
    while (true) {
      if (this.len > 1 && this.cur == "\\") {
	this.feedSequence();

      } else if (this.len == 0 || this.cur == "}") {
	level--;
	if (level == 0 || this.len == 0) {
	  this.end = this.index-1;
	  if (this.len > 0) this.feedchar();
	  this.type = this.STR;
	  return this.OK;
	}
................................................................................
      }
      if (this.cur == "#" && this.type == this.EOL) {
	this.parseComment();
	continue;
      }
      return this.parseString();
    }

    return this.OK; // unreached
  }
  this.feedSequence = function () {
    //return;
    if (this.cur != "\\") throw "Invalid escape sequence";
    var cur = this.steal(1);
    //puts("enter feedSequence, text: "+this.text+" cur: "+cur);
    var specials = {};
    specials.a = "\a";
    specials.b = "\b";
    specials.f = "\f";
    specials.n = "\n";
    specials.r = "\r";
    specials.t = "\t";
................................................................................
    case 'u':
      var hex = this.steal(4);
      if (hex != Tcl.isHexSeq.exec(hex))
	throw "Invalid unicode escape sequence: "+hex;
      cur = String.fromCharCode(parseInt(hex,16));
      break;
    case 'x':

      var hex = this.steal(2);
      puts("enter case x, hex: '"+hex+"'");
      if (hex != Tcl.isHexSeq.exec(hex))
	throw "Invalid unicode escape sequence: "+hex;
      cur = String.fromCharCode(parseInt(hex,16));
      //puts("hex: "+hex.toString()+" cur: "+cur);

      break;
    case "a": case "b": case "f": case "n":
    case "r": case "t": case "v":
      cur = specials[cur];
      break;
    default:
      if ("0123456789".indexOf(cur) >= 0) {







<




>







 







>
>
>
>
>
>
>
>
>







 







>
|








|
>







<
|
|


|
<
>
|







 







<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<







 







|
|
|

|
|
|
|
|







 







|
|
|
|







|







 







|

|







 







|
|







 







|

>
|







 







>






|







 







>
|
|




>







98
99
100
101
102
103
104

105
106
107
108
109
110
111
112
113
114
115
116
...
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
...
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708

709
710
711
712
713

714
715
716
717
718
719
720
721
722
...
826
827
828
829
830
831
832



































833
834
835
836
837
838
839
....
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
....
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
....
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
....
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
....
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
....
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
....
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
    }
    this.eval = function (code) {
      try {
	return this.eval2(code);
      } catch (e) {
	var msg = code.substr(0,128);
	if(msg.length >= 125) msg += "...";

	var msg = e+'\n        while executing\n"'+msg+'"';
	for(var i = this.level; i > 0; i--)
	  msg += '\n        invoked from within\n"'+this.levelcall[i]+'"'
	this.setVar("::errorInfo", msg);
	throw e;
      }
    }
    this.eval2 = function(code) {
      this.code  = this.OK;
      var parser = new TclParser(code);
      var args   = [];
      var first  = true;
................................................................................
	for (var i = 2; i < args.length; i++) str += args[i].toString();
        interp.setVar(vname, str);
        return str;
      });
    this.registerCommand("break", function (interp, args) {
        interp.code = interp.BRK;
        return;
      });
    this.registerCommand("catch", function (interp, args) {
	this.arity(args, 2, 3);
	var code = args[1].toString();
	var res;
	var rc   = 0;
	try {res = interp.eval(code);} catch(e) {res = e; rc = 1;}
	if(args.length == 3) interp.setVar(args[2], res);
	return rc;
      });
    this.registerCommand("cd", function (interp, args) {
	this.arity(args, 1, 2);
	var dir = process.env.HOME;
	if (args.length == 2) dir = args[1].toString();
	process.chdir(dir);
	return;
................................................................................
        var r = args[1];
        interp.code = interp.RET;
        return r;
    });
    this.registerCommand("set", function (interp, args) {
        this.arity(args, 2, 3);
        var name = args[1];
	var val  = eval(args[2]);
        if (args.length == 3) interp.setVar(name, val);
        return interp.getVar(name);
    });
    this.registerCommand("source", function (interp, args) {
        this.arity(args, 2);
        interp.script = args[1].toString();
        try {
	  var data = fs.readFileSync(interp.script).toString();
        } catch(e) {
	  throw 'couldn\' read file "'+interp.script
	    +'": no such file or directory';}
	var res    = interp.eval(data);
	interp.script = "";
	return res;
      });
    this.registerCommand("split", function (interp, args) {
        this.arity(args, 2, 3);
        var str = args[1].toString();

        var sep = (args.length == 3)? args[2].toString() : " ";
	var res = [], element;
        var tmp = str.split(sep);
	for(var i in tmp) {
	  element = tmp[i];

	  if(element == "") element = "{}";
	  res.push(element);
	}
	return res.join(" ");
      });
    this.registerSubCommand("string", "compare", function (interp, args) {
        this.arity(args, 3);
	var a = args[1].toString();
	var b = args[2].toString();
................................................................................
	  return;
        }
        base = cmd[0].toString();
        cmd.shift();
        interp.registerSubCommand(base, cmd.join(" "), eval(args[2].toString()));
        return;
      });



































    this.mkList = function(x) {
      var list = [];
      for (var name in x) {list.push(name);}
      return list;
    }
    this.objectify = function (text) {
      if (text == null) text = "";
................................................................................
  this.SEP = 0;
  this.STR = 1;
  this.EOL = 2;
  this.EOF = 3;
  this.ESC = 4;
  this.CMD = 5;
  this.VAR = 6;
  this.text        = text;
  this.start       = 0;
  this.end         = 0;
  this.insidequote = false;
  this.index       = 0;
  this.len         = text.length;
  this.type        = this.EOL;
  this.cur         = this.text.charAt(0);
  this.getText     = function () {
    return this.text.substring(this.start,this.end+1);
  }
  this.parseString = function () {
    var newword = (this.type==this.SEP ||
		   this.type == this.EOL || this.type == this.STR);
    if (newword && this.cur == "{") return this.parseBrace();
    else if (newword && this.cur == '"') {
................................................................................
    this.start = this.index;
    while (true) {
      if (this.len == 0) {
	this.end = this.index-1;
	this.type = this.ESC;
	return this.OK;
      }
      /*if (this.cur == "\\") { // works not :(
	if (this.len >= 2) this.feedSequence();
	}
	else*/ if ("$[ \t\n\r;".indexOf(this.cur)>=0) {
	if ("$[".indexOf(this.cur)>=0 || !this.insidequote) {
	  this.end = this.index-1;
	  this.type = this.ESC;
	  return this.OK;
	}
      }
      else if (this.cur == '"' && this.insidequote) {
	this.end  = this.index-1;
	this.type = this.ESC;
	this.feedchar();
	this.insidequote = false;
	return this.OK;
      }
      this.feedchar();
    }
................................................................................
    while (true) {
      if (this.len == 0) {
	this.end  = this.index;
	this.type = this.EOL;
	return;
      }
      switch (this.cur) {
	/*case "\\":
	if (this.len >= 2) this.feedSequence();
	break;*/
      case " ": case "\t": case "\n": case "\r":
	if (level > 0) break;
	this.end  = this.index - 1;
	this.type = this.SEP;
	this.feedchar();
	return;
      case '{': level++; break;
................................................................................
    while (true) {
      if (this.len == 0) break;
      if (this.cur == "[" && blevel == 0)
	level++;
      else if (this.cur == "]" && blevel == 0) {
	level--;
	if (level == 0) break;
	//} else if (this.cur == "\\") {
	//this.feedSequence();
      } else if (this.cur == "{") {
	blevel++;
      } else if (this.cur == "}") {
	if (blevel != 0) blevel--;
      }
      this.feedchar();
    }
................................................................................
    this.setPos(this.end+1);
    return this.OK;
  }
  this.parseBrace = function () {
    var level = 1;
    this.feedcharstart();
    while (true) {
      /*if (this.len > 1 && this.cur == "\\") {
	this.feedSequence();
	} else*/
      if (this.len == 0 || this.cur == "}") {
	level--;
	if (level == 0 || this.len == 0) {
	  this.end = this.index-1;
	  if (this.len > 0) this.feedchar();
	  this.type = this.STR;
	  return this.OK;
	}
................................................................................
      }
      if (this.cur == "#" && this.type == this.EOL) {
	this.parseComment();
	continue;
      }
      return this.parseString();
    }
    puts("unreachable?");
    return this.OK; // unreached
  }
  this.feedSequence = function () {
    //return;
    if (this.cur != "\\") throw "Invalid escape sequence";
    var cur = this.steal(1);
    puts("enter feedSequence, text: "+this.text+" cur: "+cur);
    var specials = {};
    specials.a = "\a";
    specials.b = "\b";
    specials.f = "\f";
    specials.n = "\n";
    specials.r = "\r";
    specials.t = "\t";
................................................................................
    case 'u':
      var hex = this.steal(4);
      if (hex != Tcl.isHexSeq.exec(hex))
	throw "Invalid unicode escape sequence: "+hex;
      cur = String.fromCharCode(parseInt(hex,16));
      break;
    case 'x':
      /*
      var hex = cur; //this.steal(2);
      puts("enter case x, hex: '"+hex+"' cur: '"+cur+'"');
      if (hex != Tcl.isHexSeq.exec(hex))
	throw "Invalid unicode escape sequence: "+hex;
      cur = String.fromCharCode(parseInt(hex,16));
      //puts("hex: "+hex.toString()+" cur: "+cur);
      */
      break;
    case "a": case "b": case "f": case "n":
    case "r": case "t": case "v":
      cur = specials[cur];
      break;
    default:
      if ("0123456789".indexOf(cur) >= 0) {

Modified test_tcljs.tcl from [c15ca09a61] to [da8fb3dc27].

27
28
29
30
31
32
33





34
35
36
37
38
39
40
..
70
71
72
73
74
75
76




77
78
79
80
81
82
83



84
85
86
87
88
89
90
...
121
122
123
124
125
126
127





128
129
130
131
132
133
134
...
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
e.g. {append x bar}     -> foobar

proc sum args {expr [join $args +]}
e.g. {sum 1 2 3} -> 6
#native sum2 {function (interp, args) {return eval(args.join("+"));}}
#e.g. {sum2 2 3 4} -> 9






e.g. {concat {a b} {c d}} -> {a b c d}

e.g. {set d [dict create a 1 b 2 c 3]} -> {a 1 b 2 c 3}
e.g. {dict exists $d c} -> 1
e.g. {dict exists $d x} -> 0
e.g. {dict get $d b}    -> 2
e.g. {dict keys $d}     -> {a b c}
................................................................................
e.g. {set x 0xFF; expr {$x+0}} -> 255
e.g. {expr 0376}               -> 254
e.g. {set x 0375; expr $x}     -> 253
e.g. {expr {$x}}   -> 253
e.g. {expr 6 * 7}  -> 42
e.g. {expr 1 == 2} -> 0
e.g. {expr 1 < 2}  -> 1




e.g. {expr !0}     -> 1
e.g. {expr !42}    -> 0
e.g. {set x 3}     -> 3
e.g. {expr $x+1}   -> 4
e.g. {expr {$x+1}} -> 4
e.g. {set x a; set y b; expr {$x == $y}} -> 0
e.g. {expr {$x != $y}} -> 1




set forres ""
e.g. {for {set i 0} {$i < 5} {incr i} {append forres $i}; set forres} -> 01234
e.g. {foreach i {a b c d e} {append foreachres $i}; set foreachres}   -> abcde

e.g. {format %x 255} -> ff
e.g. {format %X 254} -> FE
................................................................................
e.g. {llength $x}         -> 4
e.g. {lindex $x 2}        -> c
e.g. {lrange $x 1 2}      -> {b c}
e.g. {lreverse {a b c}}   -> {c b a}
e.g. {lsearch $x b}       -> 1
e.g. {lsearch $x y}       -> -1
e.g. {lsort {z x y}}      -> {x y z}






e.g. {regexp {X[ABC]Y} XAY}    -> 1
e.g. {regexp {X[ABC]Y} XDY}    -> 0
e.g. {regsub {[A-C]+} uBAAD x} -> uxD 

e.g. {split "a b  c d"}     -> {a b {} c d}
e.g. {split " a b  c d"}     -> {{} a b {} c d}
................................................................................
e.g. {string length ""}       -> 0
e.g. {string length foo}      -> 3
e.g. {string range hello 1 3} -> ell
e.g. {string tolower Tcl}     -> tcl
e.g. {string toupper Tcl}     -> TCL
e.g. {string trim " foo "}    -> foo

#e.g. {set x a.\x62.c} -> a.b.c ;# severe malfunction, breaks test suite operation :(

puts "total $total tests, passed $passed, failed $fail"
#----------- clean up variables used in tests
foreach var [info vars] {
    set pos [lsearch $vars $var] ;# expr can't substitute commands yet
    set neq [string compare $var vars]
    if {$var != "vars" && $pos < 0} {unset $var}
}
unset vars var pos neq
puts "vars now: [info vars]"
puts "[llength [info commands]] commands implemented"







>
>
>
>
>







 







>
>
>
>







>
>
>







 







>
>
>
>
>







 







|











27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
..
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
...
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
...
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
e.g. {append x bar}     -> foobar

proc sum args {expr [join $args +]}
e.g. {sum 1 2 3} -> 6
#native sum2 {function (interp, args) {return eval(args.join("+"));}}
#e.g. {sum2 2 3 4} -> 9

e.g. {catch foo msg} -> 1
e.g. {set msg} -> {invalid command name "foo"}
e.g. {catch {expr 7*6}} -> 0
e.g. {catch {expr 7*6} msg; set msg} -> 42

e.g. {concat {a b} {c d}} -> {a b c d}

e.g. {set d [dict create a 1 b 2 c 3]} -> {a 1 b 2 c 3}
e.g. {dict exists $d c} -> 1
e.g. {dict exists $d x} -> 0
e.g. {dict get $d b}    -> 2
e.g. {dict keys $d}     -> {a b c}
................................................................................
e.g. {set x 0xFF; expr {$x+0}} -> 255
e.g. {expr 0376}               -> 254
e.g. {set x 0375; expr $x}     -> 253
e.g. {expr {$x}}   -> 253
e.g. {expr 6 * 7}  -> 42
e.g. {expr 1 == 2} -> 0
e.g. {expr 1 < 2}  -> 1
e.g. {expr 1 > 2}  -> 0
e.g. {expr 1 != 2} -> 1
e.g. {expr 1 <= 2} -> 1
e.g. {expr 1 >= 2} -> 0
e.g. {expr !0}     -> 1
e.g. {expr !42}    -> 0
e.g. {set x 3}     -> 3
e.g. {expr $x+1}   -> 4
e.g. {expr {$x+1}} -> 4
e.g. {set x a; set y b; expr {$x == $y}} -> 0
e.g. {expr {$x != $y}} -> 1
e.g. {expr 43 % 5}     -> 3 
e.g. {set x -44; expr {-$x}} -> 44
e.g. {expr 1<<3} -> 8

set forres ""
e.g. {for {set i 0} {$i < 5} {incr i} {append forres $i}; set forres} -> 01234
e.g. {foreach i {a b c d e} {append foreachres $i}; set foreachres}   -> abcde

e.g. {format %x 255} -> ff
e.g. {format %X 254} -> FE
................................................................................
e.g. {llength $x}         -> 4
e.g. {lindex $x 2}        -> c
e.g. {lrange $x 1 2}      -> {b c}
e.g. {lreverse {a b c}}   -> {c b a}
e.g. {lsearch $x b}       -> 1
e.g. {lsearch $x y}       -> -1
e.g. {lsort {z x y}}      -> {x y z}

e.g. {proc f args {expr [join $args +]}} -> ""
e.g. {f 1}     -> 1
e.g. {f 1 2}   -> 3
e.g. {f 1 2 3} -> 6

e.g. {regexp {X[ABC]Y} XAY}    -> 1
e.g. {regexp {X[ABC]Y} XDY}    -> 0
e.g. {regsub {[A-C]+} uBAAD x} -> uxD 

e.g. {split "a b  c d"}     -> {a b {} c d}
e.g. {split " a b  c d"}     -> {{} a b {} c d}
................................................................................
e.g. {string length ""}       -> 0
e.g. {string length foo}      -> 3
e.g. {string range hello 1 3} -> ell
e.g. {string tolower Tcl}     -> tcl
e.g. {string toupper Tcl}     -> TCL
e.g. {string trim " foo "}    -> foo

e.g. {set x a.\x62.c} -> a.b.c ;# severe malfunction, breaks test suite operation :(

puts "total $total tests, passed $passed, failed $fail"
#----------- clean up variables used in tests
foreach var [info vars] {
    set pos [lsearch $vars $var] ;# expr can't substitute commands yet
    set neq [string compare $var vars]
    if {$var != "vars" && $pos < 0} {unset $var}
}
unset vars var pos neq
puts "vars now: [info vars]"
puts "[llength [info commands]] commands implemented"