void IoMessage_copy_(IoMessage *self, IoMessage *other) { IoMessage_rawSetName_(self, DATA(other)->name); { List *l1 = DATA(self)->args; List *l2 = DATA(other)->args; size_t i, max = List_size(l2); List_removeAll(l1); for (i = 0; i < max; i ++) { List_append_(l1, IOREF(List_rawAt_(l2, i))); } } IoMessage_rawSetNext_(self, DATA(other)->next); IoMessage_rawSetCachedResult_(self, DATA(other)->cachedResult); IoMessage_rawCopySourceLocation(self, other); }
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); } }