Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | [39fed4dae5] Make sure return value from Tcl_PkgRequire*() survives long enough for caller to use it. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | core-8-6-branch |
| Files: | files | file ages | folders |
| SHA3-256: |
6bf2a6d132e66d187e208a45f3afbf28 |
| User & Date: | dgp 2019-03-08 14:46:26 |
Context
|
2019-03-17
| ||
| 22:15 | For Tcl >= 8.7, always compile-in the extended Unicode tables, no matter the value of TCL_UTF_MAX. D... check-in: 5c8a1f59fa user: jan.nijtmans tags: core-8-6-branch | |
|
2019-03-13
| ||
| 00:44 | merge 8.6 Leaf check-in: 73e7e3f694 user: sebres tags: sebres-8-6-clock-speedup-cr2 | |
|
2019-03-08
| ||
| 14:47 | merge 8.6 check-in: 8d5d640832 user: dgp tags: core-8-branch | |
| 14:46 | [39fed4dae5] Make sure return value from Tcl_PkgRequire*() survives long enough for caller to use it... check-in: 6bf2a6d132 user: dgp tags: core-8-6-branch | |
| 04:42 | merge 8.5 (perf-test) check-in: 5b6af82bad user: sebres tags: core-8-6-branch | |
|
2019-03-07
| ||
| 22:13 | In the 8.6.* releases, Tcl_GetStringResult() still passes through interp->result. Have to ask specif... Closed-Leaf check-in: e6479634cb user: dgp tags: bug-39fed4dae5 | |
Changes
Changes to generic/tclPkg.c.
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 ... 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 ... 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 ... 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 ... 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 ... 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 ... 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 ... 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 ... 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 .... 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 .... 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 |
* For each package that is known in any way to an interpreter, there is one
* record of the following type. These records are stored in the
* "packageTable" hash table in the interpreter, keyed by package name such as
* "Tk" (no version number).
*/
typedef struct Package {
char *version; /* Version that has been supplied in this
* interpreter via "package provide"
* (malloc'ed). NULL means the package doesn't
* exist in this interpreter yet. */
PkgAvail *availPtr; /* First in list of all available versions of
* this package. */
const void *clientData; /* Client data. */
} Package;
typedef struct Require {
void * clientDataPtr;
................................................................................
{
Package *pkgPtr;
char *pvi, *vi;
int res;
pkgPtr = FindPackage(interp, name);
if (pkgPtr->version == NULL) {
DupString(pkgPtr->version, version);
pkgPtr->clientData = clientData;
return TCL_OK;
}
if (CheckVersionAndConvert(interp, pkgPtr->version, &pvi,
NULL) != TCL_OK) {
return TCL_ERROR;
} else if (CheckVersionAndConvert(interp, version, &vi, NULL) != TCL_OK) {
ckfree(pvi);
return TCL_ERROR;
}
................................................................................
if (clientData != NULL) {
pkgPtr->clientData = clientData;
}
return TCL_OK;
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"conflicting versions provided for package \"%s\": %s, then %s",
name, pkgPtr->version, version));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE", "VERSIONCONFLICT", NULL);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
................................................................................
/*
* Translate between old and new API, and defer to the new function.
*/
if (version == NULL) {
if (Tcl_PkgRequireProc(interp, name, 0, NULL, clientDataPtr) == TCL_OK) {
result = Tcl_GetStringResult(interp);
Tcl_ResetResult(interp);
}
} else {
if (exact && TCL_OK
!= CheckVersionAndConvert(interp, version, NULL, NULL)) {
return NULL;
}
ov = Tcl_NewStringObj(version, -1);
if (exact) {
Tcl_AppendStringsToObj(ov, "-", version, NULL);
}
Tcl_IncrRefCount(ov);
if (Tcl_PkgRequireProc(interp, name, 1, &ov, clientDataPtr) == TCL_OK) {
result = Tcl_GetStringResult(interp);
Tcl_ResetResult(interp);
}
TclDecrRefCount(ov);
}
return result;
}
................................................................................
}
/*
* Ensure that the provided version meets the current requirements.
*/
if (reqc != 0) {
CheckVersionAndConvert(interp, reqPtr->pkgPtr->version, &pkgVersionI, NULL);
satisfies = SomeRequirementSatisfied(pkgVersionI, reqc, reqv);
ckfree(pkgVersionI);
if (!satisfies) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"version conflict for package \"%s\": have %s, need",
name, reqPtr->pkgPtr->version));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE", "VERSIONCONFLICT",
NULL);
AddRequirementsToResult(interp, reqc, reqv);
return TCL_ERROR;
}
}
if (clientDataPtr) {
const void **ptr = (const void **) clientDataPtr;
*ptr = reqPtr->pkgPtr->clientData;
}
Tcl_SetObjResult(interp, Tcl_NewStringObj(reqPtr->pkgPtr->version, -1));
return TCL_OK;
}
static int
PkgRequireCoreCleanup(ClientData data[], Tcl_Interp *interp, int result) {
ckfree(data[0]);
return result;
................................................................................
" no version of package %s provided",
name, versionToProvide, name));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE", "UNPROVIDED",
NULL);
} else {
char *pvi, *vi;
if (CheckVersionAndConvert(interp, reqPtr->pkgPtr->version, &pvi,
NULL) != TCL_OK) {
result = TCL_ERROR;
} else if (CheckVersionAndConvert(interp,
versionToProvide, &vi, NULL) != TCL_OK) {
ckfree(pvi);
result = TCL_ERROR;
} else {
int res = CompareVersions(pvi, vi, NULL);
................................................................................
ckfree(vi);
if (res != 0) {
result = TCL_ERROR;
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"attempt to provide package %s %s failed:"
" package %s %s provided instead",
name, versionToProvide,
name, reqPtr->pkgPtr->version));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE",
"WRONGPROVIDE", NULL);
}
}
}
} else if (result != TCL_ERROR) {
Tcl_Obj *codePtr = Tcl_NewIntObj(result);
................................................................................
* This is consistent with our returning NULL. If we're not
* willing to tell our caller we got a particular version, we
* shouldn't store that version for telling future callers
* either.
*/
if (reqPtr->pkgPtr->version != NULL) {
ckfree(reqPtr->pkgPtr->version);
reqPtr->pkgPtr->version = NULL;
}
reqPtr->pkgPtr->clientData = NULL;
return result;
}
Tcl_NRAddCallback(interp, data[3], reqPtr, INT2PTR(reqc), (void *)reqv, NULL);
................................................................................
hPtr = Tcl_FindHashEntry(&iPtr->packageTable, keyString);
if (hPtr == NULL) {
continue;
}
pkgPtr = Tcl_GetHashValue(hPtr);
Tcl_DeleteHashEntry(hPtr);
if (pkgPtr->version != NULL) {
ckfree(pkgPtr->version);
}
while (pkgPtr->availPtr != NULL) {
availPtr = pkgPtr->availPtr;
pkgPtr->availPtr = availPtr->nextPtr;
Tcl_EventuallyFree(availPtr->version, TCL_DYNAMIC);
Tcl_EventuallyFree(availPtr->script, TCL_DYNAMIC);
ckfree(availPtr);
................................................................................
}
argv2 = TclGetString(objv[2]);
if (objc == 3) {
hPtr = Tcl_FindHashEntry(&iPtr->packageTable, argv2);
if (hPtr != NULL) {
pkgPtr = Tcl_GetHashValue(hPtr);
if (pkgPtr->version != NULL) {
Tcl_SetObjResult(interp,
Tcl_NewStringObj(pkgPtr->version, -1));
}
}
return TCL_OK;
}
argv3 = TclGetString(objv[3]);
if (CheckVersionAndConvert(interp, argv3, NULL, NULL) != TCL_OK) {
return TCL_ERROR;
................................................................................
Tcl_HashEntry *hPtr;
PkgAvail *availPtr;
for (hPtr = Tcl_FirstHashEntry(&iPtr->packageTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
pkgPtr = Tcl_GetHashValue(hPtr);
if (pkgPtr->version != NULL) {
ckfree(pkgPtr->version);
}
while (pkgPtr->availPtr != NULL) {
availPtr = pkgPtr->availPtr;
pkgPtr->availPtr = availPtr->nextPtr;
Tcl_EventuallyFree(availPtr->version, TCL_DYNAMIC);
Tcl_EventuallyFree(availPtr->script, TCL_DYNAMIC);
ckfree(availPtr);
|
| < < < > | | | | | | > | | | | | | | | < | |
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 ... 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 ... 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 ... 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 ... 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 ... 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 ... 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 ... 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 ... 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 .... 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 .... 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 |
* For each package that is known in any way to an interpreter, there is one
* record of the following type. These records are stored in the
* "packageTable" hash table in the interpreter, keyed by package name such as
* "Tk" (no version number).
*/
typedef struct Package {
Tcl_Obj *version;
PkgAvail *availPtr; /* First in list of all available versions of
* this package. */
const void *clientData; /* Client data. */
} Package;
typedef struct Require {
void * clientDataPtr;
................................................................................
{
Package *pkgPtr;
char *pvi, *vi;
int res;
pkgPtr = FindPackage(interp, name);
if (pkgPtr->version == NULL) {
pkgPtr->version = Tcl_NewStringObj(version, -1);
Tcl_IncrRefCount(pkgPtr->version);
pkgPtr->clientData = clientData;
return TCL_OK;
}
if (CheckVersionAndConvert(interp, Tcl_GetString(pkgPtr->version), &pvi,
NULL) != TCL_OK) {
return TCL_ERROR;
} else if (CheckVersionAndConvert(interp, version, &vi, NULL) != TCL_OK) {
ckfree(pvi);
return TCL_ERROR;
}
................................................................................
if (clientData != NULL) {
pkgPtr->clientData = clientData;
}
return TCL_OK;
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"conflicting versions provided for package \"%s\": %s, then %s",
name, Tcl_GetString(pkgPtr->version), version));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE", "VERSIONCONFLICT", NULL);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
................................................................................
/*
* Translate between old and new API, and defer to the new function.
*/
if (version == NULL) {
if (Tcl_PkgRequireProc(interp, name, 0, NULL, clientDataPtr) == TCL_OK) {
result = Tcl_GetString(Tcl_GetObjResult(interp));
Tcl_ResetResult(interp);
}
} else {
if (exact && TCL_OK
!= CheckVersionAndConvert(interp, version, NULL, NULL)) {
return NULL;
}
ov = Tcl_NewStringObj(version, -1);
if (exact) {
Tcl_AppendStringsToObj(ov, "-", version, NULL);
}
Tcl_IncrRefCount(ov);
if (Tcl_PkgRequireProc(interp, name, 1, &ov, clientDataPtr) == TCL_OK) {
result = Tcl_GetString(Tcl_GetObjResult(interp));
Tcl_ResetResult(interp);
}
TclDecrRefCount(ov);
}
return result;
}
................................................................................
}
/*
* Ensure that the provided version meets the current requirements.
*/
if (reqc != 0) {
CheckVersionAndConvert(interp, Tcl_GetString(reqPtr->pkgPtr->version),
&pkgVersionI, NULL);
satisfies = SomeRequirementSatisfied(pkgVersionI, reqc, reqv);
ckfree(pkgVersionI);
if (!satisfies) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"version conflict for package \"%s\": have %s, need",
name, Tcl_GetString(reqPtr->pkgPtr->version)));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE", "VERSIONCONFLICT",
NULL);
AddRequirementsToResult(interp, reqc, reqv);
return TCL_ERROR;
}
}
if (clientDataPtr) {
const void **ptr = (const void **) clientDataPtr;
*ptr = reqPtr->pkgPtr->clientData;
}
Tcl_SetObjResult(interp, reqPtr->pkgPtr->version);
return TCL_OK;
}
static int
PkgRequireCoreCleanup(ClientData data[], Tcl_Interp *interp, int result) {
ckfree(data[0]);
return result;
................................................................................
" no version of package %s provided",
name, versionToProvide, name));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE", "UNPROVIDED",
NULL);
} else {
char *pvi, *vi;
if (TCL_OK != CheckVersionAndConvert(interp,
Tcl_GetString(reqPtr->pkgPtr->version), &pvi, NULL)) {
result = TCL_ERROR;
} else if (CheckVersionAndConvert(interp,
versionToProvide, &vi, NULL) != TCL_OK) {
ckfree(pvi);
result = TCL_ERROR;
} else {
int res = CompareVersions(pvi, vi, NULL);
................................................................................
ckfree(vi);
if (res != 0) {
result = TCL_ERROR;
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"attempt to provide package %s %s failed:"
" package %s %s provided instead",
name, versionToProvide,
name, Tcl_GetString(reqPtr->pkgPtr->version)));
Tcl_SetErrorCode(interp, "TCL", "PACKAGE",
"WRONGPROVIDE", NULL);
}
}
}
} else if (result != TCL_ERROR) {
Tcl_Obj *codePtr = Tcl_NewIntObj(result);
................................................................................
* This is consistent with our returning NULL. If we're not
* willing to tell our caller we got a particular version, we
* shouldn't store that version for telling future callers
* either.
*/
if (reqPtr->pkgPtr->version != NULL) {
Tcl_DecrRefCount(reqPtr->pkgPtr->version);
reqPtr->pkgPtr->version = NULL;
}
reqPtr->pkgPtr->clientData = NULL;
return result;
}
Tcl_NRAddCallback(interp, data[3], reqPtr, INT2PTR(reqc), (void *)reqv, NULL);
................................................................................
hPtr = Tcl_FindHashEntry(&iPtr->packageTable, keyString);
if (hPtr == NULL) {
continue;
}
pkgPtr = Tcl_GetHashValue(hPtr);
Tcl_DeleteHashEntry(hPtr);
if (pkgPtr->version != NULL) {
Tcl_DecrRefCount(pkgPtr->version);
}
while (pkgPtr->availPtr != NULL) {
availPtr = pkgPtr->availPtr;
pkgPtr->availPtr = availPtr->nextPtr;
Tcl_EventuallyFree(availPtr->version, TCL_DYNAMIC);
Tcl_EventuallyFree(availPtr->script, TCL_DYNAMIC);
ckfree(availPtr);
................................................................................
}
argv2 = TclGetString(objv[2]);
if (objc == 3) {
hPtr = Tcl_FindHashEntry(&iPtr->packageTable, argv2);
if (hPtr != NULL) {
pkgPtr = Tcl_GetHashValue(hPtr);
if (pkgPtr->version != NULL) {
Tcl_SetObjResult(interp, pkgPtr->version);
}
}
return TCL_OK;
}
argv3 = TclGetString(objv[3]);
if (CheckVersionAndConvert(interp, argv3, NULL, NULL) != TCL_OK) {
return TCL_ERROR;
................................................................................
Tcl_HashEntry *hPtr;
PkgAvail *availPtr;
for (hPtr = Tcl_FirstHashEntry(&iPtr->packageTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
pkgPtr = Tcl_GetHashValue(hPtr);
if (pkgPtr->version != NULL) {
Tcl_DecrRefCount(pkgPtr->version);
}
while (pkgPtr->availPtr != NULL) {
availPtr = pkgPtr->availPtr;
pkgPtr->availPtr = availPtr->nextPtr;
Tcl_EventuallyFree(availPtr->version, TCL_DYNAMIC);
Tcl_EventuallyFree(availPtr->script, TCL_DYNAMIC);
ckfree(availPtr);
|
Changes to generic/tclTestProcBodyObj.c.
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 .. 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 ... 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 |
#include "tclInt.h" /* * name and version of this package */ static const char packageName[] = "procbodytest"; static const char packageVersion[] = "1.0"; /* * Name of the commands exported by this package */ static const char procCommand[] = "proc"; /* * this struct describes an entry in the table of command names and command * procs */ typedef struct CmdTable { ................................................................................ } CmdTable; /* * Declarations for functions defined in this file. */ static int ProcBodyTestProcObjCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int ProcBodyTestInitInternal(Tcl_Interp *interp, int isSafe); static int RegisterCommand(Tcl_Interp* interp, const char *namespace, const CmdTable *cmdTablePtr); /* * List of commands to create when the package is loaded; must go after the * declarations of the enable command procedure. */ static const CmdTable commands[] = { { procCommand, ProcBodyTestProcObjCmd, 1 }, { 0, 0, 0 } }; static const CmdTable safeCommands[] = { { procCommand, ProcBodyTestProcObjCmd, 1 }, { 0, 0, 0 } }; /* *---------------------------------------------------------------------- * * Procbodytest_Init -- ................................................................................ myobjv[4] = NULL; result = Tcl_ProcObjCmd(NULL, interp, objc, myobjv); Tcl_DecrRefCount(bodyObjPtr); return result; } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */ |
| > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > |
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 .. 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 ... 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 |
#include "tclInt.h" /* * name and version of this package */ static const char packageName[] = "procbodytest"; static const char packageVersion[] = "1.1"; /* * Name of the commands exported by this package */ static const char procCommand[] = "proc"; static const char checkCommand[] = "check"; /* * this struct describes an entry in the table of command names and command * procs */ typedef struct CmdTable { ................................................................................ } CmdTable; /* * Declarations for functions defined in this file. */ static int ProcBodyTestProcObjCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int ProcBodyTestCheckObjCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int ProcBodyTestInitInternal(Tcl_Interp *interp, int isSafe); static int RegisterCommand(Tcl_Interp* interp, const char *namespace, const CmdTable *cmdTablePtr); /* * List of commands to create when the package is loaded; must go after the * declarations of the enable command procedure. */ static const CmdTable commands[] = { { procCommand, ProcBodyTestProcObjCmd, 1 }, { checkCommand, ProcBodyTestCheckObjCmd, 1 }, { 0, 0, 0 } }; static const CmdTable safeCommands[] = { { procCommand, ProcBodyTestProcObjCmd, 1 }, { checkCommand, ProcBodyTestCheckObjCmd, 1 }, { 0, 0, 0 } }; /* *---------------------------------------------------------------------- * * Procbodytest_Init -- ................................................................................ myobjv[4] = NULL; result = Tcl_ProcObjCmd(NULL, interp, objc, myobjv); Tcl_DecrRefCount(bodyObjPtr); return result; } /* *---------------------------------------------------------------------- * * ProcBodyTestCheckObjCmd -- * * Implements the "procbodytest::check" command. Here is the command * description: * procbodytest::check * * Performs an internal check that the Tcl_PkgPresent() command returns * the same version number as was registered when the procbodytest package * was provided. Places a boolean in the interp result indicating the * test outcome. * * Results: * Returns a standard Tcl code. * *---------------------------------------------------------------------- */ static int ProcBodyTestCheckObjCmd( ClientData dummy, /* context; not used */ Tcl_Interp *interp, /* the current interpreter */ int objc, /* argument count */ Tcl_Obj *const objv[]) /* arguments */ { const char *version; if (objc != 1) { Tcl_WrongNumArgs(interp, 1, objv, ""); return TCL_ERROR; } version = Tcl_PkgPresent(interp, packageName, packageVersion, 1); Tcl_SetObjResult(interp, Tcl_NewBooleanObj( strcmp(version, packageVersion) == 0)); return TCL_OK; } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */ |
Changes to tests/proc.test.
317 318 319 320 321 322 323 324 325 326 327 328 329 330 |
set end [getbytes]
}
set leakedBytes [expr {$end - $tmp}]
} -cleanup {
rename getbytes {}
unset -nocomplain end i tmp leakedBytes
} -result 0
test proc-5.1 {Bytecompiling noop; test for correct argument substitution} -body {
proc p args {} ; # this will be bytecompiled into t
proc t {} {
set res {}
set a 0
set b 0
|
> > > |
317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 |
set end [getbytes]
}
set leakedBytes [expr {$end - $tmp}]
} -cleanup {
rename getbytes {}
unset -nocomplain end i tmp leakedBytes
} -result 0
test proc-4.9 {[39fed4dae5] Valid Tcl_PkgPresent return} procbodytest {
procbodytest::check
} 1
test proc-5.1 {Bytecompiling noop; test for correct argument substitution} -body {
proc p args {} ; # this will be bytecompiled into t
proc t {} {
set res {}
set a 0
set b 0
|