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Add missing delta from non-squashed version.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| #ifndef VISQOL_INCLUDE_STATUSOR_MACROS_H | ||
| #define VISQOL_INCLUDE_STATUSOR_MACROS_H | ||
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| #include "absl/status/status.h" | ||
| #include "absl/status/statusor.h" | ||
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| namespace Visqol { | ||
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| #define VISQOL_RETURN_IF_ERROR(expr) \ | ||
| do { \ | ||
| /* Using _status below to avoid capture problems if expr is "status". */ \ | ||
| const absl::Status _status = (expr); \ | ||
| if (!_status.ok()) return _status; \ | ||
| } while (0) | ||
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| template<typename T> | ||
| absl::Status DoAssignOrReturn(T& lhs, absl::StatusOr<T> result) { | ||
| if (result.ok()) { | ||
| lhs = result.value(); | ||
| } | ||
| return result.status(); | ||
| } | ||
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| #define VISQOL_ASSIGN_OR_RETURN_IMPL(status, lhs, rexpr) \ | ||
| absl::Status status = ::Visqol::DoAssignOrReturn(lhs, (rexpr)); \ | ||
| if (!status.ok()) return status; | ||
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| #define VISQOL_STATUS_MACROS_CONCAT_NAME_INNER(x, y) x##y | ||
| #define VISQOL_STATUS_MACROS_CONCAT_NAME(x, y) VISQOL_STATUS_MACROS_CONCAT_NAME_INNER(x, y) | ||
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| // Executes an expression that returns a util::StatusOr, extracting its value | ||
| // into the variable defined by lhs (or returning on error). | ||
| // | ||
| // Example: Assigning to an existing value | ||
| // ValueType value; | ||
| // ASSIGN_OR_RETURN(value, MaybeGetValue(arg)); | ||
| // | ||
| // WARNING: VISQOL_ASSIGN_OR_RETURN expands into multiple statements; it cannot be used | ||
| // in a single statement (e.g. as the body of an if statement without {})! | ||
| #define VISQOL_ASSIGN_OR_RETURN(lhs, rexpr) \ | ||
| VISQOL_ASSIGN_OR_RETURN_IMPL( \ | ||
| VISQOL_STATUS_MACROS_CONCAT_NAME(_status_or_value, __COUNTER__), lhs, rexpr); | ||
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| } // namespace Visqol | ||
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| #endif // VISQOL_INCLUDE_STATUSOR_MACROS_H |