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added extra arguments to list constructors for default size/ value

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2016-07-17 12:01:50 +10:00
parent 5418e4f8f3
commit 45d9794476
3 changed files with 46 additions and 0 deletions
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1
AUTHORS
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@ -16,3 +16,4 @@ Evan Hahn <me@evanhahn.com>
Starbeamrainbowlabs <contact@starbeamrainbowlabs.com>
Alexander Roper <minirop@gmail.com>
Will Speak <will@willspeak.me>
Max Ferguson <maxxferguson@gmail.com>

37
src/vm/wren_core.c
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@ -239,6 +239,41 @@ DEF_PRIMITIVE(list_new)
RETURN_OBJ(wrenNewList(vm, 0));
}
//creates a new list of size args[1], with all elements initilized to null
DEF_PRIMITIVE(list_newWithSize)
{
if(!validateInt(vm, args[1], "Size")) return false;
uint32_t size = (uint32_t)AS_NUM(args[1]);
ObjList* list = wrenNewList(vm, size);
for(uint32_t i=0; i < size; i++)
{
list->elements.data[i] = NULL_VAL;
}
RETURN_OBJ(list);
}
//creates a new list of size args[1], with all elements initilized to args[2]
DEF_PRIMITIVE(list_newWithSizeDefault)
{
if(!validateInt(vm, args[1], "Size")) return false;
uint32_t size = (uint32_t)AS_NUM(args[1]);
ObjList* list = wrenNewList(vm, size);
for(uint32_t i=0; i < size; i++)
{
list->elements.data[i] = args[2];
}
RETURN_OBJ(list);
}
DEF_PRIMITIVE(list_add)
{
wrenValueBufferWrite(vm, &AS_LIST(args[0])->elements, args[1]);
@ -1260,6 +1295,8 @@ void wrenInitializeCore(WrenVM* vm)
vm->listClass = AS_CLASS(wrenFindVariable(vm, coreModule, "List"));
PRIMITIVE(vm->listClass->obj.classObj, "new()", list_new);
PRIMITIVE(vm->listClass->obj.classObj, "new(_)", list_newWithSize);
PRIMITIVE(vm->listClass->obj.classObj, "new(_,_)", list_newWithSizeDefault);
PRIMITIVE(vm->listClass, "[_]", list_subscript);
PRIMITIVE(vm->listClass, "[_]=(_)", list_subscriptSetter);
PRIMITIVE(vm->listClass, "add(_)", list_add);

8
test/core/list/new_extra_args.wren Normal file
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@ -0,0 +1,8 @@
var list = List.new(5)
System.print(list.count) // expect: 5
System.print(list) // expect: [null, null, null, null, null]
var list2 = List.new(5, 2)
System.print(list2.count) // expect: 5
System.print(list2) // expect: [2, 2, 2, 2, 2]