scanTag scans into a slice,tag handle/suffix are split by valueDivider, not \0

source/dyaml/parser.d

@@ -425,6 +425,8 @@ final class Parser
             string tag = null;
             Mark startMark, endMark, tagMark;
             bool invalidMarks = true;
+            // The index in the tag string where tag handle ends and tag suffix starts.
+            uint tagHandleEnd;
 
             //Get anchor/tag if detected. Return false otherwise.
             bool get(const TokenID id, const Flag!"first" first, ref string target)
@@ -433,7 +435,11 @@ final class Parser
                 invalidMarks = false;
                 immutable token = scanner_.getToken();
                 if(first){startMark = token.startMark;}
-                if(id == TokenID.Tag){tagMark = token.startMark;}
+                if(id == TokenID.Tag)
+                {
+                    tagMark = token.startMark;
+                    tagHandleEnd = token.valueDivider;
+                }
                 endMark = token.endMark; 
                 target  = token.value;
                 return true;
@@ -443,7 +449,7 @@ final class Parser
             if(get(TokenID.Anchor, Yes.first, anchor)){get(TokenID.Tag, No.first, tag);}
             else if(get(TokenID.Tag, Yes.first, tag)) {get(TokenID.Anchor, No.first, anchor);}
 
-            if(tag !is null){tag = processTag(tag, startMark, tagMark);}
+            if(tag !is null){tag = processTag(tag, tagHandleEnd, startMark, tagMark);}
 
             if(invalidMarks)
             {
@@ -525,17 +531,17 @@ final class Parser
          * Process a tag string retrieved from a tag token.
          *
          * Params:  tag       = Tag before processing.
+         *          handleEnd = Index in tag where tag handle ends and tag suffix
+         *                      starts.
          *          startMark = Position of the node the tag belongs to.
          *          tagMark   = Position of the tag.
          */ 
-        string processTag(const string tag, const Mark startMark, const Mark tagMark)
+        string processTag(const string tag, const uint handleEnd,
+                          const Mark startMark, const Mark tagMark)
             const @trusted
         {
-            //Tag handle and suffix are separated by '\0'.
+            const handle = tag[0 .. handleEnd];
-            const parts = tag.split("\0");
+            const suffix = tag[handleEnd .. $];
-            assert(parts.length == 2, "Tag data stored incorrectly in a token");
-            const handle = parts[0];
-            const suffix = parts[1];
 
             if(handle.length > 0)
             {

source/dyaml/scanner.d

@@ -1064,19 +1064,19 @@ final class Scanner
         {
             const startMark = reader_.mark;
             dchar c = reader_.peek(1);
-            dstring handle;
+
-            dstring suffix;
+            reader_.sliceBuilder.begin();
+            scope(failure) { reader_.sliceBuilder.finish(); }
+            // Index where tag handle ends and tag suffix starts in the tag value
+            // (slice) we will produce.
+            uint handleEnd;
 
             if(c == '<')
             {
                 reader_.forward(2);
 
-                reader_.sliceBuilder.begin();
+                handleEnd = 0;
-                {
-                    scope(failure) { reader_.sliceBuilder.finish(); }
                 scanTagURIToSlice("tag", startMark);
-                }
-                suffix = reader_.sliceBuilder.finish();
                 enforce(reader_.peek() == '>',
                         new Error("While scanning a tag", startMark,
                                   "expected '>' but found" ~ reader_.peek().to!string,
@@ -1085,8 +1085,9 @@ final class Scanner
             }
             else if(" \t\0\n\r\u0085\u2028\u2029"d.canFind(c))
             {
-                suffix = "!"d.dup;
                 reader_.forward();
+                handleEnd = 0;
+                reader_.sliceBuilder.write('!');
             }
             else
             {
@@ -1106,28 +1107,25 @@ final class Scanner
 
                 if(useHandle)
                 {
-                    reader_.sliceBuilder.begin();
-                    scope(failure) { reader_.sliceBuilder.finish(); }
                     scanTagHandleToSlice("tag", startMark);
-                    handle = reader_.sliceBuilder.finish();
+                    handleEnd = cast(uint)reader_.sliceBuilder.length;
                 }
                 else
                 {
-                    handle = "!"d.dup;
                     reader_.forward();
+                    reader_.sliceBuilder.write('!');
+                    handleEnd = cast(uint)reader_.sliceBuilder.length;
                 }
 
-                reader_.sliceBuilder.begin();
-                scope(failure) { reader_.sliceBuilder.finish(); }
                 scanTagURIToSlice("tag", startMark);
-                suffix = reader_.sliceBuilder.finish();
             }
 
             enforce(" \0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()),
                     new Error("While scanning a tag", startMark,
                               "expected ' ' but found" ~ reader_.peek().to!string,
                               reader_.mark));
-            return tagToken(startMark, reader_.mark, utf32To8(handle ~ '\0' ~ suffix));
+            const dstring slice = reader_.sliceBuilder.finish();
+            return tagToken(startMark, reader_.mark, slice.utf32To8, handleEnd);
         }
 
         ///Scan a block scalar token with specified style.

source/dyaml/token.d

@@ -128,9 +128,12 @@ alias simpleToken!(TokenID.FlowEntry)          flowEntryToken;
 ///          start        = Start position of the token.
 ///          end          = End position of the token.
 ///          value        = Value of the token.
-Token simpleValueToken(TokenID id)(const Mark start, const Mark end, const string value)
+///          valueDivider = A hack for TagToken to store 2 values in value; the first
+///                         value goes up to valueDivider, the second after it.
+Token simpleValueToken(TokenID id)(const Mark start, const Mark end, const string value,
+                                   const uint valueDivider = uint.max)
 {
-    return Token(value, start, end, id);
+    return Token(value, start, end, id, ScalarStyle.Invalid, Encoding.init, valueDivider);
 }
 
 /// Alias for construction of tag token.