motiejus/zig
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implement allowzero pointer attribute

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closes #1953

only needed for freestanding targets.

also adds safety for `@intToPtr` when the address is zero.
This commit is contained in:
Andrew Kelley
2019-03-25 12:55:45 -04:00
parent 3306e43984
commit 5eaead6a56
18 changed files with 225 additions and 78 deletions
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13
src/parser.cpp
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@@ -2530,6 +2530,12 @@ static AstNode *ast_parse_prefix_type_op(ParseContext *pc) {
if (array != nullptr) {
assert(array->type == NodeTypeArrayType);
while (true) {
Token *allowzero_token = eat_token_if(pc, TokenIdKeywordAllowZero);
if (allowzero_token != nullptr) {
array->data.array_type.allow_zero_token = allowzero_token;
continue;
}
AstNode *align_expr = ast_parse_byte_align(pc);
if (align_expr != nullptr) {
array->data.array_type.align_expr = align_expr;
@@ -2545,7 +2551,6 @@ static AstNode *ast_parse_prefix_type_op(ParseContext *pc) {
array->data.array_type.is_volatile = true;
continue;
}
break;
}
@@ -2560,6 +2565,12 @@ static AstNode *ast_parse_prefix_type_op(ParseContext *pc) {
if (child == nullptr)
child = ptr;
while (true) {
Token *allowzero_token = eat_token_if(pc, TokenIdKeywordAllowZero);
if (allowzero_token != nullptr) {
child->data.pointer_type.allow_zero_token = allowzero_token;
continue;
}
if (eat_token_if(pc, TokenIdKeywordAlign) != nullptr) {
expect_token(pc, TokenIdLParen);
AstNode *align_expr = ast_parse_expr(pc);