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Bug 1274922 part 5 - Remove JSEXN_NONE and add JSEXN_WARN. r=jorendorff

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This commit is contained in:
Jan de Mooij 2016-05-31 08:07:00 +02:00
parent 1543ead04a
commit 847b10eeb0
13 changed files with 61 additions and 66 deletions
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2
dom/workers/WorkerPrivate.cpp
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@ -5928,7 +5928,7 @@ WorkerPrivate::ReportError(JSContext* aCx, const char* aFallbackMessage,
columnNumber = aReport->tokenOffset();
flags = aReport->flags;
errorNumber = aReport->errorNumber;
MOZ_ASSERT(aReport->exnType >= JSEXN_NONE && aReport->exnType < JSEXN_LIMIT);
MOZ_ASSERT(aReport->exnType >= JSEXN_FIRST && aReport->exnType < JSEXN_LIMIT);
exnType = JSExnType(aReport->exnType);
}
else {

2
js/src/ctypes/ctypes.msg
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@ -9,7 +9,7 @@
* For syntax details, see js/src/js.msg.
*/
MSG_DEF(CTYPESMSG_PLACEHOLDER_0, 0, JSEXN_NONE, NULL)
MSG_DEF(CTYPESMSG_PLACEHOLDER_0, 0, JSEXN_ERR, NULL)
/* type conversion */
MSG_DEF(CTYPESMSG_CONV_ERROR_ARG,3, JSEXN_TYPEERR, "can't pass {0} to argument {1} of {2}")

4
js/src/jit-test/tests/basic/statement-after-return.js
View File

@ -5,7 +5,7 @@ function testWarn(code, lineNumber, columnNumber) {
eval(code);
var warning = getLastWarning();
assertEq(warning !== null, true, "warning should be caught for " + code);
assertEq(warning.name, "None");
assertEq(warning.name, "Warning");
assertEq(warning.lineNumber, lineNumber);
assertEq(warning.columnNumber, columnNumber);
@ -13,7 +13,7 @@ function testWarn(code, lineNumber, columnNumber) {
Reflect.parse(code);
warning = getLastWarning();
assertEq(warning !== null, true, "warning should be caught for " + code);
assertEq(warning.name, "None");
assertEq(warning.name, "Warning");
// Warning generated by Reflect.parse has line/column number for Reflect.parse
// itself, not parsed code.
disableLastWarning();

4
js/src/jit-test/tests/parser/expr-closure-warn.js
View File

@ -15,7 +15,7 @@ function testWarn(code) {
g.eval('eval(code)');
var warning = getLastWarning();
assertEq(warning !== null, true, "warning should be caught for " + code);
assertEq(warning.name, "None");
assertEq(warning.name, "Warning");
clearLastWarning();
g.eval('eval(code)');
@ -28,7 +28,7 @@ function testWarn(code) {
g.eval('Reflect.parse(code);');
warning = getLastWarning();
assertEq(warning !== null, true, "warning should be caught for " + code);
assertEq(warning.name, "None");
assertEq(warning.name, "Warning");
clearLastWarning();
g.eval('Reflect.parse(code);');

18
js/src/js.msg
View File

@ -41,7 +41,7 @@
* "Rhino is not a member of the Monkey family"
*/
MSG_DEF(JSMSG_NOT_AN_ERROR, 0, JSEXN_NONE, "<Error #0 is reserved>")
MSG_DEF(JSMSG_NOT_AN_ERROR, 0, JSEXN_ERR, "<Error #0 is reserved>")
MSG_DEF(JSMSG_NOT_DEFINED, 1, JSEXN_REFERENCEERR, "{0} is not defined")
MSG_DEF(JSMSG_MORE_ARGS_NEEDED, 3, JSEXN_TYPEERR, "{0} requires more than {1} argument{2}")
MSG_DEF(JSMSG_INCOMPATIBLE_PROTO, 3, JSEXN_TYPEERR, "{0}.prototype.{1} called on incompatible {2}")
@ -71,7 +71,7 @@ MSG_DEF(JSMSG_UNDEFINED_PROP, 1, JSEXN_REFERENCEERR, "reference to unde
MSG_DEF(JSMSG_INVALID_MAP_ITERABLE, 1, JSEXN_TYPEERR, "iterable for {0} should have array-like objects")
MSG_DEF(JSMSG_NESTING_GENERATOR, 0, JSEXN_TYPEERR, "already executing generator")
MSG_DEF(JSMSG_INCOMPATIBLE_METHOD, 3, JSEXN_TYPEERR, "{0} {1} called on incompatible {2}")
MSG_DEF(JSMSG_OBJECT_WATCH_DEPRECATED, 0, JSEXN_NONE, "Object.prototype.watch and unwatch are very slow, non-standard, and deprecated; use a getter/setter instead")
MSG_DEF(JSMSG_OBJECT_WATCH_DEPRECATED, 0, JSEXN_WARN, "Object.prototype.watch and unwatch are very slow, non-standard, and deprecated; use a getter/setter instead")
MSG_DEF(JSMSG_BAD_SURROGATE_CHAR, 1, JSEXN_TYPEERR, "bad surrogate character {0}")
MSG_DEF(JSMSG_UTF8_CHAR_TOO_LARGE, 1, JSEXN_TYPEERR, "UTF-8 character {0} too large")
MSG_DEF(JSMSG_MALFORMED_UTF8_CHAR, 1, JSEXN_TYPEERR, "malformed UTF-8 character sequence at offset {0}")
@ -92,7 +92,7 @@ MSG_DEF(JSMSG_BAD_GET_SET_FIELD, 1, JSEXN_TYPEERR, "property descriptor's
MSG_DEF(JSMSG_THROW_TYPE_ERROR, 0, JSEXN_TYPEERR, "'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them")
MSG_DEF(JSMSG_NOT_EXPECTED_TYPE, 3, JSEXN_TYPEERR, "{0}: expected {1}, got {2}")
MSG_DEF(JSMSG_NOT_ITERABLE, 1, JSEXN_TYPEERR, "{0} is not iterable")
MSG_DEF(JSMSG_ALREADY_HAS_PRAGMA, 2, JSEXN_NONE, "{0} is being assigned a {1}, but already has one")
MSG_DEF(JSMSG_ALREADY_HAS_PRAGMA, 2, JSEXN_WARN, "{0} is being assigned a {1}, but already has one")
MSG_DEF(JSMSG_NEXT_RETURNED_PRIMITIVE, 0, JSEXN_TYPEERR, "iterator.next() returned a non-object value")
MSG_DEF(JSMSG_CANT_SET_PROTO, 0, JSEXN_TYPEERR, "can't set prototype of this object")
MSG_DEF(JSMSG_CANT_SET_PROTO_OF, 1, JSEXN_TYPEERR, "can't set prototype of {0}")
@ -235,11 +235,11 @@ MSG_DEF(JSMSG_CURLY_IN_COMPOUND, 0, JSEXN_SYNTAXERR, "missing } in compoun
MSG_DEF(JSMSG_DECLARATION_AFTER_EXPORT,0, JSEXN_SYNTAXERR, "missing declaration after 'export' keyword")
MSG_DEF(JSMSG_DECLARATION_AFTER_IMPORT,0, JSEXN_SYNTAXERR, "missing declaration after 'import' keyword")
MSG_DEF(JSMSG_DEPRECATED_DELETE_OPERAND, 0, JSEXN_SYNTAXERR, "applying the 'delete' operator to an unqualified name is deprecated")
MSG_DEF(JSMSG_DEPRECATED_EXPR_CLOSURE, 0, JSEXN_NONE, "expression closures are deprecated")
MSG_DEF(JSMSG_DEPRECATED_FOR_EACH, 0, JSEXN_NONE, "JavaScript 1.6's for-each-in loops are deprecated; consider using ES6 for-of instead")
MSG_DEF(JSMSG_DEPRECATED_EXPR_CLOSURE, 0, JSEXN_WARN, "expression closures are deprecated")
MSG_DEF(JSMSG_DEPRECATED_FOR_EACH, 0, JSEXN_WARN, "JavaScript 1.6's for-each-in loops are deprecated; consider using ES6 for-of instead")
MSG_DEF(JSMSG_DEPRECATED_OCTAL, 0, JSEXN_SYNTAXERR, "\"0\"-prefixed octal literals and octal escape sequences are deprecated; for octal literals use the \"0o\" prefix instead")
MSG_DEF(JSMSG_DEPRECATED_PRAGMA, 1, JSEXN_NONE, "Using //@ to indicate {0} pragmas is deprecated. Use //# instead")
MSG_DEF(JSMSG_DEPRECATED_BLOCK_SCOPE_FUN_REDECL, 1, JSEXN_NONE, "redeclaration of block-scoped function `{0}' is deprecated")
MSG_DEF(JSMSG_DEPRECATED_PRAGMA, 1, JSEXN_WARN, "Using //@ to indicate {0} pragmas is deprecated. Use //# instead")
MSG_DEF(JSMSG_DEPRECATED_BLOCK_SCOPE_FUN_REDECL, 1, JSEXN_WARN, "redeclaration of block-scoped function `{0}' is deprecated")
MSG_DEF(JSMSG_DUPLICATE_EXPORT_NAME, 1, JSEXN_SYNTAXERR, "duplicate export name '{0}'")
MSG_DEF(JSMSG_DUPLICATE_FORMAL, 1, JSEXN_SYNTAXERR, "duplicate formal argument {0}")
MSG_DEF(JSMSG_DUPLICATE_LABEL, 0, JSEXN_SYNTAXERR, "duplicate label")
@ -305,7 +305,7 @@ MSG_DEF(JSMSG_SEMI_AFTER_FOR_COND, 0, JSEXN_SYNTAXERR, "missing ; after for-
MSG_DEF(JSMSG_SEMI_AFTER_FOR_INIT, 0, JSEXN_SYNTAXERR, "missing ; after for-loop initializer")
MSG_DEF(JSMSG_SEMI_BEFORE_STMNT, 0, JSEXN_SYNTAXERR, "missing ; before statement")
MSG_DEF(JSMSG_SOURCE_TOO_LONG, 0, JSEXN_RANGEERR, "source is too long")
MSG_DEF(JSMSG_STMT_AFTER_RETURN, 0, JSEXN_NONE, "unreachable code after return statement")
MSG_DEF(JSMSG_STMT_AFTER_RETURN, 0, JSEXN_WARN, "unreachable code after return statement")
MSG_DEF(JSMSG_STRICT_CODE_WITH, 0, JSEXN_SYNTAXERR, "strict mode code may not contain 'with' statements")
MSG_DEF(JSMSG_TEMPLSTR_UNTERM_EXPR, 0, JSEXN_SYNTAXERR, "missing } in template string")
MSG_DEF(JSMSG_SIMD_NOT_A_VECTOR, 2, JSEXN_TYPEERR, "expecting a SIMD {0} object as argument {1}")
@ -338,7 +338,7 @@ MSG_DEF(JSMSG_ESCAPED_KEYWORD, 0, JSEXN_SYNTAXERR, "keywords must be wri
// asm.js
MSG_DEF(JSMSG_USE_ASM_TYPE_FAIL, 1, JSEXN_TYPEERR, "asm.js type error: {0}")
MSG_DEF(JSMSG_USE_ASM_LINK_FAIL, 1, JSEXN_TYPEERR, "asm.js link error: {0}")
MSG_DEF(JSMSG_USE_ASM_TYPE_OK, 1, JSEXN_NONE, "Successfully compiled asm.js code ({0})")
MSG_DEF(JSMSG_USE_ASM_TYPE_OK, 1, JSEXN_WARN, "Successfully compiled asm.js code ({0})")
// wasm
MSG_DEF(JSMSG_WASM_FAIL, 1, JSEXN_TYPEERR, "wasm error: {0}")

12
js/src/jsapi.h
View File

@ -624,11 +624,14 @@ typedef void
/**
* Possible exception types. These types are part of a JSErrorFormatString
* structure. They define which error to throw in case of a runtime error.
* JSEXN_NONE marks an unthrowable error.
*
* JSEXN_WARN is used for warnings in js.msg files (for instance because we
* don't want to prepend 'Error:' to warning messages). This value can go away
* if we ever decide to use an entirely separate mechanism for warnings.
*/
typedef enum JSExnType {
JSEXN_NONE = -1,
JSEXN_ERR,
JSEXN_ERR,
JSEXN_FIRST = JSEXN_ERR,
JSEXN_INTERNALERR,
JSEXN_EVALERR,
JSEXN_RANGEERR,
@ -637,7 +640,8 @@ typedef enum JSExnType {
JSEXN_TYPEERR,
JSEXN_URIERR,
JSEXN_DEBUGGEEWOULDRUN,
JSEXN_LIMIT
JSEXN_WARN,
JSEXN_LIMIT
} JSExnType;
typedef struct JSErrorFormatString {

21
js/src/jsexn.cpp
View File

@ -516,8 +516,8 @@ js::GetErrorTypeName(JSRuntime* rt, int16_t exnType)
* JSEXN_INTERNALERR returns null to prevent that "InternalError: "
* is prepended before "uncaught exception: "
*/
if (exnType <= JSEXN_NONE || exnType >= JSEXN_LIMIT ||
exnType == JSEXN_INTERNALERR)
if (exnType < 0 || exnType >= JSEXN_LIMIT ||
exnType == JSEXN_INTERNALERR || exnType == JSEXN_WARN)
{
return nullptr;
}
@ -546,13 +546,14 @@ js::ErrorToException(JSContext* cx, const char* message, JSErrorReport* reportp,
if (!callback)
callback = GetErrorMessage;
const JSErrorFormatString* errorString = callback(userRef, errorNumber);
JSExnType exnType = errorString ? static_cast<JSExnType>(errorString->exnType) : JSEXN_NONE;
JSExnType exnType = errorString ? static_cast<JSExnType>(errorString->exnType) : JSEXN_ERR;
MOZ_ASSERT(exnType < JSEXN_LIMIT);
// Return false (no exception raised) if no exception is associated
// with the given error number.
if (exnType == JSEXN_NONE)
return false;
if (exnType == JSEXN_WARN) {
// werror must be enabled, so we use JSEXN_ERR.
MOZ_ASSERT(cx->runtime()->options().werror());
exnType = JSEXN_ERR;
}
// Prevent infinite recursion.
if (cx->generatingError)
@ -632,9 +633,7 @@ ErrorReportToString(JSContext* cx, JSErrorReport* reportp)
* goes out of its way to avoid this.
*/
JSExnType type = static_cast<JSExnType>(reportp->exnType);
RootedString str(cx);
if (type != JSEXN_NONE)
str = ClassName(GetExceptionProtoKey(type), cx);
RootedString str(cx, ClassName(GetExceptionProtoKey(type), cx));
/*
* If "str" is null at this point, that means we just want to use
* reportp->ucmessage without prefixing it with anything.
@ -898,7 +897,7 @@ ErrorReport::init(JSContext* cx, HandleValue exn,
new (reportp) JSErrorReport();
ownedReport.filename = filename.ptr();
ownedReport.lineno = lineno;
ownedReport.exnType = int16_t(JSEXN_NONE);
ownedReport.exnType = JSEXN_INTERNALERR;
ownedReport.column = column;
if (str) {
// Note that using |str| for |ucmessage| here is kind of wrong,

7
js/src/jsexn.h
View File

@ -95,7 +95,8 @@ static_assert(JSEXN_ERR == 0 &&
JSProto_Error + JSEXN_TYPEERR == JSProto_TypeError &&
JSProto_Error + JSEXN_URIERR == JSProto_URIError &&
JSProto_Error + JSEXN_DEBUGGEEWOULDRUN == JSProto_DebuggeeWouldRun &&
JSEXN_DEBUGGEEWOULDRUN + 1 == JSEXN_LIMIT,
JSEXN_DEBUGGEEWOULDRUN + 1 == JSEXN_WARN &&
JSEXN_WARN + 1 == JSEXN_LIMIT,
"GetExceptionProtoKey and ExnTypeFromProtoKey require that "
"each corresponding JSExnType and JSProtoKey value be separated "
"by the same constant value");
@ -104,7 +105,7 @@ static inline JSProtoKey
GetExceptionProtoKey(JSExnType exn)
{
MOZ_ASSERT(JSEXN_ERR <= exn);
MOZ_ASSERT(exn < JSEXN_LIMIT);
MOZ_ASSERT(exn < JSEXN_WARN);
return JSProtoKey(JSProto_Error + int(exn));
}
@ -113,7 +114,7 @@ ExnTypeFromProtoKey(JSProtoKey key)
{
JSExnType type = static_cast<JSExnType>(key - JSProto_Error);
MOZ_ASSERT(type >= JSEXN_ERR);
MOZ_ASSERT(type < JSEXN_LIMIT);
MOZ_ASSERT(type < JSEXN_WARN);
return type;
}

35
js/src/jsshell.msg
View File

@ -8,22 +8,19 @@
Error messages for JSShell. See js.msg for format.
*/
MSG_DEF(JSSMSG_NOT_AN_ERROR, 0, JSEXN_NONE, "<Error #0 is reserved>")
MSG_DEF(JSSMSG_CANT_OPEN, 2, JSEXN_NONE, "can't open {0}: {1}")
MSG_DEF(JSSMSG_TRAP_USAGE, 0, JSEXN_NONE, "usage: trap [fun] [pc] expr")
MSG_DEF(JSSMSG_LINE2PC_USAGE, 0, JSEXN_NONE, "usage: line2pc [fun] line")
MSG_DEF(JSSMSG_FILE_SCRIPTS_ONLY, 0, JSEXN_NONE, "only works on JS scripts read from files")
MSG_DEF(JSSMSG_UNEXPECTED_EOF, 1, JSEXN_NONE, "unexpected EOF in {0}")
MSG_DEF(JSSMSG_DOEXP_USAGE, 0, JSEXN_NONE, "usage: doexp obj id")
MSG_DEF(JSSMSG_SCRIPTS_ONLY, 0, JSEXN_NONE, "only works on scripts")
MSG_DEF(JSSMSG_NOT_ENOUGH_ARGS, 1, JSEXN_NONE, "{0}: not enough arguments")
MSG_DEF(JSSMSG_TOO_MANY_ARGS, 1, JSEXN_NONE, "{0}: too many arguments")
MSG_DEF(JSSMSG_ASSERT_EQ_FAILED, 2, JSEXN_NONE, "Assertion failed: got {0}, expected {1}")
MSG_DEF(JSSMSG_ASSERT_EQ_FAILED_MSG, 3, JSEXN_NONE, "Assertion failed: got {0}, expected {1}: {2}")
MSG_DEF(JSSMSG_INVALID_ARGS, 1, JSEXN_NONE, "{0}: invalid arguments")
MSG_DEF(JSSMSG_BAD_ALIGNMENT, 0, JSEXN_NONE, "serialized data must be 8-byte-aligned")
MSG_DEF(JSSMSG_BAD_ENV_VAR, 1, JSEXN_NONE, "unable to read getenv({0})")
MSG_DEF(JSSMSG_NESTED_FAIL, 0, JSEXN_NONE, "error executing nested JS shell")
MSG_DEF(JSSMSG_CACHE_EQ_SIZE_FAILED, 2, JSEXN_NONE, "cache does not have the same size: got {0}, expected {1}")
MSG_DEF(JSSMSG_CACHE_EQ_CONTENT_FAILED, 0, JSEXN_NONE, "cache does not have the same content.")
MSG_DEF(JSSMSG_CACHE_SINGLETON_FAILED, 0, JSEXN_NONE, "compartment cannot save singleton anymore.")
MSG_DEF(JSSMSG_NOT_AN_ERROR, 0, JSEXN_ERR, "<Error #0 is reserved>")
MSG_DEF(JSSMSG_CANT_OPEN, 2, JSEXN_ERR, "can't open {0}: {1}")
MSG_DEF(JSSMSG_LINE2PC_USAGE, 0, JSEXN_ERR, "usage: line2pc [fun] line")
MSG_DEF(JSSMSG_FILE_SCRIPTS_ONLY, 0, JSEXN_ERR, "only works on JS scripts read from files")
MSG_DEF(JSSMSG_UNEXPECTED_EOF, 1, JSEXN_ERR, "unexpected EOF in {0}")
MSG_DEF(JSSMSG_SCRIPTS_ONLY, 0, JSEXN_ERR, "only works on scripts")
MSG_DEF(JSSMSG_NOT_ENOUGH_ARGS, 1, JSEXN_ERR, "{0}: not enough arguments")
MSG_DEF(JSSMSG_TOO_MANY_ARGS, 1, JSEXN_ERR, "{0}: too many arguments")
MSG_DEF(JSSMSG_ASSERT_EQ_FAILED, 2, JSEXN_ERR, "Assertion failed: got {0}, expected {1}")
MSG_DEF(JSSMSG_ASSERT_EQ_FAILED_MSG, 3, JSEXN_ERR, "Assertion failed: got {0}, expected {1}: {2}")
MSG_DEF(JSSMSG_INVALID_ARGS, 1, JSEXN_ERR, "{0}: invalid arguments")
MSG_DEF(JSSMSG_BAD_ALIGNMENT, 0, JSEXN_ERR, "serialized data must be 8-byte-aligned")
MSG_DEF(JSSMSG_NESTED_FAIL, 0, JSEXN_ERR, "error executing nested JS shell")
MSG_DEF(JSSMSG_CACHE_EQ_SIZE_FAILED, 2, JSEXN_ERR, "cache does not have the same size: got {0}, expected {1}")
MSG_DEF(JSSMSG_CACHE_EQ_CONTENT_FAILED, 0, JSEXN_ERR, "cache does not have the same content.")
MSG_DEF(JSSMSG_CACHE_SINGLETON_FAILED, 0, JSEXN_ERR, "compartment cannot save singleton anymore.")

6
js/src/shell/js.cpp
View File

@ -5854,8 +5854,8 @@ CreateLastWarningObject(JSContext* cx, JSErrorReport* report)
return false;
RootedString nameStr(cx);
if (report->exnType == JSEXN_NONE)
nameStr = JS_NewStringCopyZ(cx, "None");
if (report->exnType == JSEXN_WARN)
nameStr = JS_NewStringCopyZ(cx, "Warning");
else
nameStr = GetErrorTypeName(cx->runtime(), report->exnType);
if (!nameStr)
@ -5958,7 +5958,7 @@ js::shell::my_ErrorReporter(JSContext* cx, const char* message, JSErrorReport* r
savedExc.restore();
}
if (report->exnType != JSEXN_NONE && !JSREPORT_IS_WARNING(report->flags)) {
if (!JSREPORT_IS_WARNING(report->flags)) {
if (report->errorNumber == JSMSG_OUT_OF_MEMORY)
sr->exitCode = EXITCODE_OUT_OF_MEMORY;
else

4
js/src/tests/shell/warning.js
View File

@ -5,7 +5,7 @@ var summary = 'Add js shell functions to get last warning';
print(BUGNUMBER + ": " + summary);
// Warning with JSEXN_NONE.
// Warning with JSEXN_WARN.
enableLastWarning();
@ -13,7 +13,7 @@ eval(`{ function f() {} function f() {} }`);
var warning = getLastWarning();
assertEq(warning !== null, true);
assertEq(warning.name, "None");
assertEq(warning.name, "Warning");
assertEq(warning.message.includes("deprecated"), true);
assertEq(warning.lineNumber, 1);
assertEq(warning.columnNumber, 27);

3
js/src/vm/ErrorObject.h
View File

@ -60,8 +60,7 @@ class ErrorObject : public NativeObject
static const Class classes[JSEXN_LIMIT];
static const Class * classForType(JSExnType type) {
MOZ_ASSERT(type != JSEXN_NONE);
MOZ_ASSERT(type < JSEXN_LIMIT);
MOZ_ASSERT(type < JSEXN_WARN);
return &classes[type];
}

9
js/xpconnect/src/jsshell.msg
View File

@ -8,10 +8,5 @@
Error messages for JSShell. See js.msg for format.
*/
MSG_DEF(JSSMSG_NOT_AN_ERROR, 0, 0, JSEXN_NONE, "<Error #0 is reserved>")
MSG_DEF(JSSMSG_CANT_OPEN, 1, 2, JSEXN_NONE, "can't open {0}: {1}")
MSG_DEF(JSSMSG_TRAP_USAGE, 2, 0, JSEXN_NONE, "usage: trap [fun] [pc] expr")
MSG_DEF(JSSMSG_LINE2PC_USAGE, 3, 0, JSEXN_NONE, "usage: line2pc [fun] line")
MSG_DEF(JSSMSG_FILE_SCRIPTS_ONLY, 4, 0, JSEXN_NONE, "only works on JS scripts read from files")
MSG_DEF(JSSMSG_UNEXPECTED_EOF, 5, 1, JSEXN_NONE, "unexpected EOF in {0}")
MSG_DEF(JSSMSG_DOEXP_USAGE, 6, 0, JSEXN_NONE, "usage: doexp obj id")
MSG_DEF(JSSMSG_NOT_AN_ERROR, 0, 0, JSEXN_ERR, "<Error #0 is reserved>")
MSG_DEF(JSSMSG_CANT_OPEN, 1, 2, JSEXN_ERR, "can't open {0}: {1}")