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// SDLang-D
// Written in the D programming language.
module sdlang.exception;
import std.array;
import std.exception;
import std.range;
import std.stdio;
import std.string;
import sdlang.ast;
import sdlang.util;
/// Abstract parent class of all SDLang-D defined exceptions.
abstract class SDLangException : Exception
{
this(string msg, string file = __FILE__, size_t line = __LINE__)
{
super(msg, file, line);
}
}
/// Thrown when a syntax error is encounterd while parsing.
class ParseException : SDLangException
{
Location location;
bool hasLocation;
this(string msg, string file = __FILE__, size_t line = __LINE__)
{
hasLocation = false;
super(msg, file, line);
}
this(Location location, string msg, string file = __FILE__, size_t line = __LINE__)
{
hasLocation = true;
super("%s: %s".format(location.toString(), msg), file, line);
}
}
/// Compatibility alias
deprecated("The new name is ParseException")
alias SDLangParseException = ParseException;
/++
Thrown when attempting to do something in the DOM that's unsupported, such as:
$(UL
$(LI Adding the same instance of a tag or attribute to more than one parent.)
$(LI Writing SDLang where:
$(UL
$(LI The root tag has values, attributes or a namespace. )
$(LI An anonymous tag has a namespace. )
$(LI An anonymous tag has no values. )
$(LI A floating point value is infinity or NaN. )
)
))
+/
class ValidationException : SDLangException
{
this(string msg, string file = __FILE__, size_t line = __LINE__)
{
super(msg, file, line);
}
}
/// Compatibility alias
deprecated("The new name is ValidationException")
alias SDLangValidationException = ValidationException;
/// Thrown when someting is wrong with the provided arguments to a function.
class ArgumentException : SDLangException
{
this(string msg, string file = __FILE__, size_t line = __LINE__)
{
super(msg, file, line);
}
}
/// Thrown by the DOM on empty range and out-of-range conditions.
abstract class DOMException : SDLangException
{
Tag base; /// The tag searched from
this(Tag base, string msg, string file = __FILE__, size_t line = __LINE__)
{
this.base = base;
super(msg, file, line);
}
/// Prefixes a message with file/line information from the tag (if tag exists).
/// Optionally takes output range as a sink.
string customMsg(string msg)
{
if(!base)
return msg;
Appender!string sink;
this.customMsg(sink, msg);
return sink.data;
}
///ditto
void customMsg(Sink)(ref Sink sink, string msg) if(isOutputRange!(Sink,char))
{
if(base)
{
sink.put(base.location.toString());
sink.put(": ");
sink.put(msg);
}
else
sink.put(msg);
}
/// Outputs a message to stderr, prefixed with file/line information
void writeCustomMsg(string msg)
{
stderr.writeln( customMsg(msg) );
}
}
/// Thrown by the DOM on empty range and out-of-range conditions.
class DOMRangeException : DOMException
{
this(Tag base, string msg, string file = __FILE__, size_t line = __LINE__)
{
super(base, msg, file, line);
}
}
/// Compatibility alias
deprecated("The new name is DOMRangeException")
alias SDLangRangeException = DOMRangeException;
/// Abstract parent class of `TagNotFoundException`, `ValueNotFoundException`
/// and `AttributeNotFoundException`.
///
/// Thrown by the DOM's `sdlang.ast.Tag.expectTag`, etc. functions if a matching element isn't found.
abstract class DOMNotFoundException : DOMException
{
FullName tagName; /// The tag searched for
this(Tag base, FullName tagName, string msg, string file = __FILE__, size_t line = __LINE__)
{
this.tagName = tagName;
super(base, msg, file, line);
}
}
/// Thrown by the DOM's `sdlang.ast.Tag.expectTag`, etc. functions if a Tag isn't found.
class TagNotFoundException : DOMNotFoundException
{
this(Tag base, FullName tagName, string msg, string file = __FILE__, size_t line = __LINE__)
{
super(base, tagName, msg, file, line);
}
}
/// Thrown by the DOM's `sdlang.ast.Tag.expectValue`, etc. functions if a Value isn't found.
class ValueNotFoundException : DOMNotFoundException
{
/// Expected type for the not-found value.
TypeInfo valueType;
this(Tag base, FullName tagName, TypeInfo valueType, string msg, string file = __FILE__, size_t line = __LINE__)
{
this.valueType = valueType;
super(base, tagName, msg, file, line);
}
}
/// Thrown by the DOM's `sdlang.ast.Tag.expectAttribute`, etc. functions if an Attribute isn't found.
class AttributeNotFoundException : DOMNotFoundException
{
FullName attributeName; /// The attribute searched for
/// Expected type for the not-found attribute's value.
TypeInfo valueType;
this(Tag base, FullName tagName, FullName attributeName, TypeInfo valueType, string msg,
string file = __FILE__, size_t line = __LINE__)
{
this.valueType = valueType;
this.attributeName = attributeName;
super(base, tagName, msg, file, line);
}
}
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