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Support by-reference semantics in for value_ref, index in &some_array and for key, value_ref in &some_map

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This commit is contained in:
gingerBill
2020-03-24 15:28:58 +00:00
parent 5cbb266ef5
commit d57fbf48f0
2 changed files with 41 additions and 9 deletions
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src/check_stmt.cpp
+14
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@@ -1484,6 +1484,7 @@ void check_stmt_internal(CheckerContext *ctx, Ast *node, u32 flags) {
Entity *entities[2] = {};
isize entity_count = 0;
bool is_map = false;
bool use_by_reference_for_value = false;
Ast *expr = unparen_expr(rs->expr);
@@ -1529,26 +1530,31 @@ void check_stmt_internal(CheckerContext *ctx, Ast *node, u32 flags) {
break;
case Type_EnumeratedArray:
if (is_ptr) use_by_reference_for_value = true;
val0 = t->EnumeratedArray.elem;
val1 = t->EnumeratedArray.index;
break;
case Type_Array:
if (is_ptr) use_by_reference_for_value = true;
val0 = t->Array.elem;
val1 = t_int;
break;
case Type_DynamicArray:
if (is_ptr) use_by_reference_for_value = true;
val0 = t->DynamicArray.elem;
val1 = t_int;
break;
case Type_Slice:
if (is_ptr) use_by_reference_for_value = true;
val0 = t->Slice.elem;
val1 = t_int;
break;
case Type_Map:
if (is_ptr) use_by_reference_for_value = true;
is_map = true;
val0 = t->Map.key;
val1 = t->Map.value;
@@ -1628,6 +1634,14 @@ void check_stmt_internal(CheckerContext *ctx, Ast *node, u32 flags) {
if (found == nullptr) {
entity = alloc_entity_variable(ctx->scope, token, type, EntityState_Resolved);
entity->flags |= EntityFlag_Value;
if (use_by_reference_for_value) {
if (i == 0 && !is_map) {
entity->flags &= ~EntityFlag_Value;
} else if (i == 1 && is_map) {
entity->flags &= ~EntityFlag_Value;
}
}
add_entity_definition(&ctx->checker->info, name, entity);
} else {
TokenPos pos = found->token.pos;