void IoSandbox_printCallback(void *voidSelf, const UArray *ba)
{
IoSandbox *self = voidSelf;
IoState *state = IOSTATE;
IoSeq *buf = IoSeq_newWithUArray_copy_(IOSTATE, (UArray *)ba, 1);
IoMessage *m = IoMessage_newWithName_(state, IOSYMBOL("printCallback"));
IoMessage *arg = IoMessage_newWithName_returnsValue_(state, IOSYMBOL("buffer"), buf);
IoMessage_addArg_(m, arg);
IoMessage_locals_performOn_(m, state->lobby, self);
}
IoMessage *IoMessage_newParse(void *state, IoLexer *lexer)
{
if (IoLexer_errorToken(lexer))
{
IoMessage *m;
IoSymbol *errorString;
// Maybe the nil message could be used here. Or even a NULL.
IoSymbol *error = IoState_symbolWithCString_(state, "Error");
m = IoMessage_newWithName_returnsValue_(state, error, error);
errorString = IoState_symbolWithCString_((IoState *)state, IoLexer_errorDescription(lexer));
IoLexer_free(lexer); // hack for now - the caller should be responsible for this
IoState_error_(state, m, "compile error: %s", CSTRING(errorString));
}
if (IoLexer_topType(lexer) == TERMINATOR_TOKEN)
{
IoLexer_pop(lexer);
}
if (IoTokenType_isValidMessageName(IoLexer_topType(lexer)))
{
IoMessage *self = IoMessage_newParseNextMessageChain(state, lexer);
if (IoLexer_topType(lexer) != NO_TOKEN)
{
// TODO: Exception as the end was expected
IoState_error_(state, self, "compile error: %s", "unused tokens");
}
return self;
}
return IoMessage_newWithName_returnsValue_(state,
IoState_symbolWithCString_((IoState*)state, "nil"),
((IoState*)state)->ioNil
);
}
void Levels_attach(Levels *self, IoMessage *msg, List *expressions)
{
// TODO clean up this method.
IoState *state = IoObject_state(msg);
IoSymbol *messageSymbol = IoMessage_name(msg);
char *messageName = CSTRING(messageSymbol);
int precedence = Levels_levelForOp(self, messageName, messageSymbol, msg);
int msgArgCount = IoMessage_argCount(msg);
/*
// o a := b c ; d becomes o setSlot("a", b c) ; d
//
// a attaching
// := msg
// b c msg->next
*/
if (Levels_isAssignOperator(self, messageSymbol))
{
Level *currentLevel = Levels_currentLevel(self);
IoMessage *attaching = currentLevel->message;
IoSymbol *setSlotName;
if (attaching == NULL) // := b ;
{
// Could be handled as, message(:= 42) -> setSlot(nil, 42)
IoState_error_(state, msg, "compile error: %s requires a symbol to its left.", messageName);
return;
}
if (IoMessage_argCount(attaching) > 0) // a(1,2,3) := b ;
{
IoState_error_(state, msg, "compile error: The symbol to the left of %s cannot have arguments.", messageName);
return;
}
if (msgArgCount > 1) // setSlot("a") :=(b, c, d) e ;
{
IoState_error_(state, msg, "compile error: Assign operator passed multiple arguments, e.g., a := (b, c).", messageName);
return;
}
{
// a := b ;
IoSymbol *slotName = DATA(attaching)->name;
IoSymbol *quotedSlotName = IoSeq_newSymbolWithFormat_(state, "\"%s\"", CSTRING(slotName));
IoMessage *slotNameMessage = IoMessage_newWithName_returnsValue_(state, quotedSlotName, slotName);
IoMessage_rawCopySourceLocation(slotNameMessage, attaching);
// a := b ; -> a("a") := b ;
IoMessage_addArg_(attaching, slotNameMessage);
setSlotName = Levels_nameForAssignOperator(self, state, messageSymbol, slotName, msg);
}
// a("a") := b ; -> setSlot("a") := b ;
DATA(attaching)->name = IoObject_addingRef_(attaching, setSlotName);
currentLevel->type = ATTACH;
if (msgArgCount > 0) // setSlot("a") :=(b c) d e ;
{
// b c
IoMessage *arg = IoMessage_rawArgAt_(msg, 0);
if (DATA(msg)->next == NULL || IoMessage_rawIsEOL(DATA(msg)->next))
{
IoMessage_addArg_(attaching, arg);
}
else
{
// ()
IoMessage *foo = IoMessage_newWithName_(state, IoState_symbolWithCString_(state, ""));
IoMessage_rawCopySourceLocation(foo, attaching);
// () -> (b c)
IoMessage_addArg_(foo, arg);
// (b c) -> (b c) d e ;
IoMessage_rawSetNext_(foo, DATA(msg)->next);
// setSlot("a") :=(b c) d e ; -> setSlot("a", (b c) d e ;) :=(b c) d e ;
IoMessage_addArg_(attaching, foo);
}
}
else // setSlot("a") := b ;
{
// setSlot("a") := or setSlot("a") := ;
IoMessage *mn = DATA(msg)->next;
IoSymbol *name = mn ? DATA(mn)->name : NULL;
IoSymbol *semi = IoObject_state(msg)->semicolonSymbol;
//if (mn == NULL || IoMessage_rawIsEOL(mn))
if (mn == NULL || name == semi)
{
IoState_error_(state, msg, "compile error: %s must be followed by a value.", messageName);
}
// setSlot("a") := b c ; -> setSlot("a", b c ;) := b c ;
IoMessage_addArg_(attaching, DATA(msg)->next);
}
// process the value (b c d) later (setSlot("a", b c d) := b c d ;)
if (DATA(msg)->next != NULL && !IoMessage_rawIsEOL(DATA(msg)->next))
{
List_push_(expressions, DATA(msg)->next);
}
{
IoMessage *last = msg;
while (DATA(last)->next != NULL && !IoMessage_rawIsEOL(DATA(last)->next))
{
last = DATA(last)->next;
}
IoMessage_rawSetNext_(attaching, DATA(last)->next);
// Continue processing in IoMessage_opShuffle loop
IoMessage_rawSetNext_(msg, DATA(last)->next);
if (last != msg)
{
IoMessage_rawSetNext_(last, NULL);
}
}
// make sure b in 1 := b gets executed
IoMessage_rawSetCachedResult_(attaching, NULL);
}
else if (IoMessage_rawIsEOL(msg))
{
Levels_popDownTo(self, IO_OP_MAX_LEVEL-1);
Level_attachAndReplace(Levels_currentLevel(self), msg);
}
else if (precedence != -1) // is an operator
{
if (msgArgCount > 0)
{
// move arguments off to their own message to make () after operators behave like Cs grouping ()
IoMessage *brackets = IoMessage_newWithName_(state, IoState_symbolWithCString_(state, ""));
IoMessage_rawCopySourceLocation(brackets, msg);
List_copy_(IoMessage_rawArgList(brackets), IoMessage_rawArgList(msg));
List_removeAll(IoMessage_rawArgList(msg));
// Insert the brackets message between msg and its next message
IoMessage_rawSetNext_(brackets, DATA(msg)->next);
IoMessage_rawSetNext_(msg, brackets);
}
Levels_popDownTo(self, precedence);
Levels_attachToTopAndPush(self, msg, precedence);
}
else
{
Level_attachAndReplace(Levels_currentLevel(self), msg);
}
}
