58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
// Copyright 2017 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef FXJS_CJS_RESULT_H_
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#define FXJS_CJS_RESULT_H_
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#include "fxjs/js_resources.h"
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#include "third_party/base/optional.h"
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#include "v8/include/v8.h"
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class CJS_Result {
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public:
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// Wrap constructors with static methods so we can apply WARN_UNUSED_RESULT,
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// otherwise we can't catch places where someone mistakenly writes:
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//
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// if (error)
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// CJS_Result(JS_ERROR_CODE);
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//
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// instead of
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//
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// if (error)
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// return CJS_Result(JS_ERROR_CODE);
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//
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static CJS_Result Success() WARN_UNUSED_RESULT { return CJS_Result(); }
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static CJS_Result Success(v8::Local<v8::Value> value) WARN_UNUSED_RESULT {
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return CJS_Result(value);
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}
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static CJS_Result Failure(const WideString& str) WARN_UNUSED_RESULT {
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return CJS_Result(str);
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}
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static CJS_Result Failure(JSMessage id) WARN_UNUSED_RESULT {
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return CJS_Result(id);
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}
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CJS_Result(const CJS_Result&);
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~CJS_Result();
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bool HasError() const { return error_.has_value(); }
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WideString Error() const { return error_.value(); }
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bool HasReturn() const { return !return_.IsEmpty(); }
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v8::Local<v8::Value> Return() const { return return_; }
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private:
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CJS_Result(); // Successful but empty return.
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explicit CJS_Result(v8::Local<v8::Value>); // Successful return with value.
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explicit CJS_Result(const WideString&); // Error with custom message.
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explicit CJS_Result(JSMessage id); // Error with stock message.
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Optional<WideString> error_;
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v8::Local<v8::Value> return_;
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};
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#endif // FXJS_CJS_RESULT_H_
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