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Add alternation destructuring operator ?//

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This is a first pass to show the implementation.
It needs tests and evaluation, but doesn't break any existing tests.

NOT READY FOR MERGING
This commit is contained in:
William Langford authored and Nicolas Williams committed 2017-03-26 05:36:22 -05:00
1 parent b142d484d5
commit 3a8c8f4747
7 files changed
+206 -27
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src/execute.c
+21
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@@ -451,6 +451,15 @@ jv jq_next(jq_state *jq) {
break;
}
case PUSHK_UNDER: {
jv v = jv_array_get(jv_copy(frame_current(jq)->bc->constants), *pc++);
assert(jv_is_valid(v));
jv v2 = stack_pop(jq);
stack_push(jq, v);
stack_push(jq, v2);
break;
}
case POP: {
jv_free(stack_pop(jq));
break;
@@ -548,6 +557,8 @@ jv jq_next(jq_state *jq) {
break;
}
case STOREVN:
stack_save(jq, pc - 1, stack_get_pos(jq));
case STOREV: {
uint16_t level = *pc++;
uint16_t v = *pc++;
@@ -563,6 +574,16 @@ jv jq_next(jq_state *jq) {
break;
}
case ON_BACKTRACK(STOREVN): {
uint16_t level = *pc++;
uint16_t v = *pc++;
jv* var = frame_local_var(jq, v, level);
jv_free(*var);
*var = jv_null();
goto do_backtrack;
break;
}
case STORE_GLOBAL: {
// Get the constant
jv val = jv_array_get(jv_copy(frame_current(jq)->bc->constants), *pc++);