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Code Issues 1 Releases Wiki Activity

Add destructuring in def and var statements for tables and structs.

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This commit is contained in:
Calvin Rose 2018-02-06 02:02:28 -05:00
parent ddee7f55e3
commit c76b08cecc
1 changed files with 31 additions and 6 deletions
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37
src/compiler/specials.c
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@ -57,7 +57,6 @@ static void destructure(DstCompiler *c, Dst left, DstSlot right,
left = dst_ast_unwrap1(left);
switch (dst_type(left)) {
default:
printf("%s\n", dst_type_names[dst_type(left)]);
dstc_cerror(c, ast, "unexpected type in destructuring");
break;
case DST_SYMBOL:
@ -73,7 +72,7 @@ static void destructure(DstCompiler *c, Dst left, DstSlot right,
DstSlot newright;
Dst subval = dst_getindex(left, i);
localright = dstc_preread(c, ast, 0xFF, 1, right);
localsub = dstc_lsloti(c);
localsub = dstc_lslotn(c, 0xFF, 3);
if (i < 0x100) {
dstc_emit(c, ast,
(i << 24) |
@ -102,10 +101,36 @@ static void destructure(DstCompiler *c, Dst left, DstSlot right,
/* Free right */
dstc_freeslot(c, right);
break;
/* TODO table destructuring */
/*case DST_TABLE:*/
/*case DST_STRUCT:*/
/*break;*/
case DST_TABLE:
case DST_STRUCT:
{
int32_t localright, localsub;
const DstKV *kv = NULL;
while ((kv = dst_next(left, kv))) {
DstSlot newright;
DstSlot kslot = dstc_cslot(dst_ast_unwrap(kv->key));
Dst subval = kv->value;
localright = dstc_preread(c, ast, 0xFF, 1, right);
localsub = dstc_lslotn(c, 0xFF, 3);
int32_t localk = dstc_preread(c, ast, 0xFF, 2, kslot);
dstc_emit(c, ast,
(localk << 24) |
(localright << 16) |
(localsub << 8) |
DOP_GET);
dstc_postread(c, kslot, localk);
newright.index = localsub;
newright.envindex = 0;
newright.constant = dst_wrap_nil();
newright.flags = DST_SLOTTYPE_ANY;
/* Traverse into the structure */
destructure(c, subval, newright, leaf, argn, argv);
dstc_postread(c, right, localright);
}
}
/* Free right */
dstc_freeslot(c, right);
break;
}
}