86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
// Copyright (c) 2013 The Chromium 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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#ifndef TOOLS_GN_ERR_H_
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#define TOOLS_GN_ERR_H_
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#include <string>
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#include <vector>
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#include "tools/gn/location.h"
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#include "tools/gn/token.h"
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class ParseNode;
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class Value;
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// Result of doing some operation. Check has_error() to see if an error
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// occurred.
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//
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// An error has a location and a message. Below that, is some optional help
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// text to go with the annotation of the location.
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//
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// An error can also have sub-errors which are additionally printed out
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// below. They can provide additional context.
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class Err {
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public:
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typedef std::vector<LocationRange> RangeList;
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// Indicates no error.
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Err();
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// Error at a single point.
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Err(const Location& location,
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const std::string& msg,
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const std::string& help = std::string());
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// Error at a given range.
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Err(const LocationRange& range,
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const std::string& msg,
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const std::string& help = std::string());
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// Error at a given token.
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Err(const Token& token,
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const std::string& msg,
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const std::string& help_text = std::string());
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// Error at a given node.
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Err(const ParseNode* node,
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const std::string& msg,
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const std::string& help_text = std::string());
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// Error at a given value.
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Err(const Value& value,
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const std::string msg,
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const std::string& help_text = std::string());
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~Err();
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bool has_error() const { return has_error_; }
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const Location& location() const { return location_; }
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const std::string& message() const { return message_; }
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const std::string& help_text() const { return help_text_; }
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void AppendRange(const LocationRange& range) { ranges_.push_back(range); }
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const RangeList& ranges() const { return ranges_; }
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void AppendSubErr(const Err& err);
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void PrintToStdout() const;
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private:
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void InternalPrintToStdout(bool is_sub_err) const;
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bool has_error_;
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Location location_;
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std::vector<LocationRange> ranges_;
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std::string message_;
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std::string help_text_;
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std::vector<Err> sub_errs_;
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};
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#endif // TOOLS_GN_ERR_H_
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