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General: Make use of std::nullopt where applicable

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Allows some implementations to avoid completely zeroing out the internal
buffer of the optional, and instead only set the validity byte within
the structure.

This also makes it consistent how we return empty optionals.
This commit is contained in:
Lioncash
2020-09-22 17:31:53 -04:00
parent c07fd2898b
commit ff45c39578
17 changed files with 60 additions and 59 deletions
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25
src/video_core/shader/ast.h
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@ -199,55 +199,48 @@ public:
}
std::optional<u32> GetGotoLabel() const {
auto inner = std::get_if<ASTGoto>(&data);
if (inner) {
if (const auto* inner = std::get_if<ASTGoto>(&data)) {
return {inner->label};
}
return {};
return std::nullopt;
}
Expr GetGotoCondition() const {
auto inner = std::get_if<ASTGoto>(&data);
if (inner) {
if (const auto* inner = std::get_if<ASTGoto>(&data)) {
return inner->condition;
}
return nullptr;
}
void MarkLabelUnused() {
auto inner = std::get_if<ASTLabel>(&data);
if (inner) {
if (auto* inner = std::get_if<ASTLabel>(&data)) {
inner->unused = true;
}
}
bool IsLabelUnused() const {
auto inner = std::get_if<ASTLabel>(&data);
if (inner) {
if (const auto* inner = std::get_if<ASTLabel>(&data)) {
return inner->unused;
}
return true;
}
std::optional<u32> GetLabelIndex() const {
auto inner = std::get_if<ASTLabel>(&data);
if (inner) {
if (const auto* inner = std::get_if<ASTLabel>(&data)) {
return {inner->index};
}
return {};
return std::nullopt;
}
Expr GetIfCondition() const {
auto inner = std::get_if<ASTIfThen>(&data);
if (inner) {
if (const auto* inner = std::get_if<ASTIfThen>(&data)) {
return inner->condition;
}
return nullptr;
}
void SetGotoCondition(Expr new_condition) {
auto inner = std::get_if<ASTGoto>(&data);
if (inner) {
if (auto* inner = std::get_if<ASTGoto>(&data)) {
inner->condition = std::move(new_condition);
}
}