All YAML exceptions now keep track of file and line they've been

thrown at, making debugging easier.

dyaml/composer.d

@@ -32,12 +32,7 @@ package:
  */
 class ComposerException : MarkedYAMLException
 {
-    this(string context, Mark contextMark, string problem, Mark problemMark)
+    mixin MarkedExceptionCtors;
-    {
-        super(context, contextMark, problem, problemMark);
-    }
-
-    this(string problem, Mark problemMark){super(problem, problemMark);}
 }
 
 ///Composes YAML documents from events provided by a Parser.

dyaml/constructor.d

@@ -43,9 +43,10 @@ class ConstructorException : YAMLException
      *          start = Start position of the error context.
      *          end   = End position of the error context.
      */
-    this(string msg, Mark start, Mark end)
+    this(string msg, Mark start, Mark end, string file = __FILE__, int line = __LINE__)
     {
-        super(msg ~ "\nstart:" ~ start.toString() ~ "\nend:" ~ end.toString());
+        super(msg ~ "\nstart:" ~ start.toString() ~ "\nend:" ~ end.toString(),
+              file, line);
     }
 }
 

dyaml/emitter.d

@@ -37,12 +37,15 @@ import dyaml.util;
 
 package:
 
-///Exception thrown at Emitter errors.
+/**
+ * Exception thrown at Emitter errors.
+ *
+ * See_Also:
+ *     YAMLException
+ */
 class EmitterException : YAMLException
 {
-    public:
+    mixin ExceptionCtors;
-        ///Construct an EmitterException with specified message.
-        this(string msg){super(msg);}
 }
 
 //Stores results of analysis of a scalar, determining e.g. what scalar style to use.

dyaml/exception.d

@@ -17,8 +17,11 @@ import std.string;
 class YAMLException : Exception
 {
     public:
-        ///Construct a YAMLException with specified message.
+        ///Construct a YAMLException with specified message, and position where it was thrown.
-        this(string msg){super(msg);}
+        this(string msg, string file = __FILE__, int line = __LINE__)
+        {
+            super(msg, file, line);
+        }
 
     package:
         //Set name of the file that was being processed when this exception was thrown.
@@ -59,17 +62,45 @@ package:
 abstract class MarkedYAMLException : YAMLException
 {
     //Construct a MarkedYAMLException with specified context and problem.
-    this(string context, Mark contextMark, string problem, Mark problemMark)
+    this(string context, Mark contextMark, string problem, Mark problemMark,
+         string file = __FILE__, int line = __LINE__)
     {
         string msg = context ~ '\n';
         if(contextMark != problemMark){msg ~= contextMark.toString() ~ '\n';}
         msg ~= problem ~ '\n' ~ problemMark.toString() ~ '\n';
-        super(msg);
+        super(msg, file, line);
     }
 
     //Construct a MarkedYAMLException with specified problem.
-    this(string problem, Mark problemMark)
+    this(string problem, Mark problemMark, string file = __FILE__, int line = __LINE__)
     {
-        super(problem ~ '\n' ~ problemMark.toString());
+        super(problem ~ '\n' ~ problemMark.toString(), file, line);
+    }
+}
+
+///Constructors of YAML exceptions are mostly the same, so we use a mixin.
+template ExceptionCtors()
+{
+    public:
+        this(string msg, string file = __FILE__, int line = __LINE__)
+        {
+            super(msg, file, line);
+        }
+}
+
+///Constructors of marked YAML exceptions are mostly the same, so we use a mixin.
+template MarkedExceptionCtors()
+{
+    public:
+        this(string context, Mark contextMark, string problem, Mark problemMark,
+             string file = __FILE__, int line = __LINE__)
+        {
+            super(context, contextMark, problem, problemMark, 
+                  file, line);
+        }
+
+        this(string problem, Mark problemMark, string file = __FILE__, int line = __LINE__)
+        {
+            super(problem, problemMark, file, line);
         }
 }

dyaml/node.d

@@ -37,9 +37,9 @@ class NodeException : YAMLException
          * Params:  msg   = Error message.
          *          start = Start position of the node.
          */
-        this(string msg, Mark start)
+        this(string msg, Mark start, string file = __FILE__, int line = __LINE__)
         {
-            super(msg ~ "\nNode at:" ~ start.toString());
+            super(msg ~ "\nNode at:" ~ start.toString(), file, line);
         }
 }
 

dyaml/parser.d

@@ -96,12 +96,7 @@ package:
  */
 class ParserException : MarkedYAMLException
 {
-    this(string context, Mark contextMark, string problem, Mark problemMark)
+    mixin MarkedExceptionCtors;
-    {
-        super(context, contextMark, problem, problemMark);
-    }
-
-    this(string problem, Mark problemMark){super(problem, problemMark);}
 }
 
 ///Generates events from tokens provided by a Scanner.

dyaml/reader.d

@@ -27,7 +27,10 @@ package:
 ///Exception thrown at Reader errors.
 class ReaderException : YAMLException
 {
-    this(string msg){super("Error reading YAML stream: " ~ msg);}
+    this(string msg, string file = __FILE__, int line = __LINE__)
+    {
+        super("Error reading YAML stream: " ~ msg, file, line);
+    }
 }
 
 ///Reads data from a stream and converts it to UTF-32 (dchar) data.

dyaml/representer.d

@@ -30,9 +30,7 @@ import dyaml.tag;
 ///Exception thrown on Representer errors.
 class RepresenterException : YAMLException
 {
-    public:
+    mixin ExceptionCtors;
-        ///Construct an RepresenterException with specified message.
-        this(string msg){super(msg);}
 }
 
 ///Used to represent YAML nodes various data types into scalar/sequence/mapping nodes ready for output.

dyaml/scanner.d

@@ -61,12 +61,7 @@ package:
  */
 class ScannerException : MarkedYAMLException
 {
-    this(string context, Mark contextMark, string problem, Mark problemMark)
+    mixin MarkedExceptionCtors;
-    {
-        super(context, contextMark, problem, problemMark);
-    }
-
-    this(string problem, Mark problemMark){super(problem, problemMark);}
 }
 
 ///Generates tokens from data provided by a Reader.