76 lines
2.2 KiB
D
76 lines
2.2 KiB
D
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// Copyright Ferdinand Majerech 2011.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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///D:YAML exceptions and exception related code.
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module dyaml.exception;
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import std.algorithm;
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import std.array;
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import std.string;
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///Base class for all exceptions thrown by D:YAML.
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class YAMLException : Exception
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{
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public:
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///Construct a YAMLException with specified message.
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this(string msg){super(msg);}
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package:
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//Set name of the file that was being processed when this exception was thrown.
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@property name(in string name)
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{
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msg = name ~ ":\n" ~ msg;
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}
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}
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///Position in a YAML stream, used for error messages.
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align(1) struct Mark
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{
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private:
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///Line number.
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ushort line_;
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///Column number.
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ushort column_;
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public:
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///Construct a Mark with specified line and column in the file.
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this(in uint line, in uint column)
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{
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line_ = cast(ushort)min(ushort.max, line);
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column_ = cast(ushort)min(ushort.max, column);
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}
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///Get a string representation of the mark.
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string toString() const
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{
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//Line/column numbers start at zero internally, make them start at 1.
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string clamped(ushort v){return format(v + 1, v == ushort.max ? " or higher" : "");}
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return format("line ", clamped(line_), ",column ", clamped(column_));
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}
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}
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package:
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//Base class of YAML exceptions with marked positions of the problem.
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abstract class MarkedYAMLException : YAMLException
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{
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//Construct a MarkedYAMLException with specified context and problem.
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this(string context, Mark contextMark, string problem, Mark problemMark)
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{
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string msg = context ~ '\n';
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if(contextMark != problemMark){msg ~= contextMark.toString() ~ '\n';}
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msg ~= problem ~ '\n' ~ problemMark.toString() ~ '\n';
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super(msg);
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}
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//Construct a MarkedYAMLException with specified problem.
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this(string problem, Mark problemMark)
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{
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super(problem ~ '\n' ~ problemMark.toString());
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}
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}
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