Added support for \-- and \--- to prevent interpretation as ndash and mdash

doc/commands.doc

@@ -209,6 +209,8 @@ documentation:
 \refitem cmdchardot \\\.
 \refitem cmddcolon \::
 \refitem cmdpipe \\|
+\refitem cmdndash \\\--
+\refitem cmdmdash \\\---
 \endsecreflist
 
 The following subsections provide a list of all commands that are recognized by
@@ -3076,6 +3078,20 @@ class Receiver
   character has to be escaped in some cases, because it is used
   for Markdown tables.
 
+<hr>
+\section cmdndash \\--
+
+  \addindex \\\--
+  This command writes two dashes (\--) to the output. This allows
+  writing two consecutive dashes to the output instead of one n-dash character (--).
+
+<hr>
+\section cmdmdash \\---
+
+  \addindex \\\---
+  This command writes three dashes (\---) to the output. This allows
+  writing three consecutuve dashes to the output instead of one m-dash character (---).
+
 <hr>
 \htmlonly <center> \endhtmlonly
 <h2>

src/cmdmapper.cpp

@@ -136,6 +136,8 @@ CommandMap cmdMap[] =
   { "parblock",      CMD_PARBLOCK },
   { "endparblock",   CMD_ENDPARBLOCK },
   { "diafile",       CMD_DIAFILE },
+  { "--",            CMD_NDASH },
+  { "---",           CMD_MDASH },
   { 0,               0 },
 };
 

src/cmdmapper.h

@@ -125,7 +125,9 @@ enum CommandType
   CMD_PARBLOCK     = 95,
   CMD_ENDPARBLOCK  = 96,
   CMD_DIAFILE      = 97,
-  CMD_LATEXINCLUDE  = 98
+  CMD_LATEXINCLUDE = 98,
+  CMD_NDASH        = 99,
+  CMD_MDASH        = 100
 };
 
 enum HtmlTagType

src/commentscan.l

@@ -1200,6 +1200,12 @@ RCSTAG    "$"{ID}":"[^\n$]+"$"
 <Comment>^{B}*([\-:|]{B}*)*("--"|"---")({B}*[\-:|])*{B}*/\n { // horizontal line (dashed)
   				          addOutput(yytext); 
                                         }
+<Comment>{CMD}"---"                     { // escaped mdash
+                                          addOutput(yytext);
+                                        }
+<Comment>{CMD}"--"                      { // escaped mdash
+                                          addOutput(yytext);
+                                        }
 <Comment>"---"                          { // mdash
                                           addOutput(insidePre || Doxygen::markdownSupport ? yytext : "&mdash;");
                                         }

src/docparser.cpp

@@ -1271,6 +1271,15 @@ reparsetoken:
         case CMD_PERCENT:
           children.append(new DocSymbol(parent,DocSymbol::Sym_Percent));
           break;
+        case CMD_NDASH:
+          children.append(new DocSymbol(parent,DocSymbol::Sym_Minus));
+          children.append(new DocSymbol(parent,DocSymbol::Sym_Minus));
+          break;
+        case CMD_MDASH:
+          children.append(new DocSymbol(parent,DocSymbol::Sym_Minus));
+          children.append(new DocSymbol(parent,DocSymbol::Sym_Minus));
+          children.append(new DocSymbol(parent,DocSymbol::Sym_Minus));
+          break;
         case CMD_QUOTE:
           children.append(new DocSymbol(parent,DocSymbol::Sym_Quot));
           break;
@@ -3281,6 +3290,8 @@ int DocIndexEntry::parse()
         case CMD_HASH:    m_entry+='#';  break;
         case CMD_DCOLON:  m_entry+="::"; break;
         case CMD_PERCENT: m_entry+='%';  break;
+        case CMD_NDASH:   m_entry+="--";  break;
+        case CMD_MDASH:   m_entry+="---";  break;
         case CMD_QUOTE:   m_entry+='"';  break;
         default:
           warn_doc_error(g_fileName,doctokenizerYYlineno,"Unexpected command %s found as argument of \\addindex",
@@ -5373,6 +5384,15 @@ int DocPara::handleCommand(const QCString &cmdName)
     case CMD_PERCENT:
       m_children.append(new DocSymbol(this,DocSymbol::Sym_Percent));
       break;
+    case CMD_NDASH:
+      m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+      m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+      break;
+    case CMD_MDASH:
+      m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+      m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+      m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+      break;
     case CMD_QUOTE:
       m_children.append(new DocSymbol(this,DocSymbol::Sym_Quot));
       break;
@@ -6828,6 +6848,15 @@ void DocText::parse()
           case CMD_PERCENT:
             m_children.append(new DocSymbol(this,DocSymbol::Sym_Percent));
             break;
+          case CMD_NDASH:
+            m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+            m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+            break;
+          case CMD_MDASH:
+            m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+            m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+            m_children.append(new DocSymbol(this,DocSymbol::Sym_Minus));
+            break;
           case CMD_QUOTE:
             m_children.append(new DocSymbol(this,DocSymbol::Sym_Quot));
             break;

src/docparser.h

@@ -395,7 +395,7 @@ class DocSymbol : public DocNode
                    /* doxygen commands mapped */
                    Sym_BSlash, Sym_At, Sym_Less, Sym_Greater, Sym_Amp,
                    Sym_Dollar, Sym_Hash, Sym_DoubleColon, Sym_Percent, Sym_Pipe,
-                   Sym_Quot
+                   Sym_Quot, Sym_Minus
                  };
     enum PerlType { Perl_unknown = 0, Perl_string, Perl_char, Perl_symbol, Perl_umlaut,
                     Perl_acute, Perl_grave, Perl_circ, Perl_slash, Perl_tilde,

src/doctokenizer.l

@@ -350,7 +350,7 @@ HFILEMASK ("."{FILESCHAR}*{FILEECHAR}+)*
 FILEMASK  ({FILESCHAR}*{FILEECHAR}+("."{FILESCHAR}*{FILEECHAR}+)*)|{HFILEMASK}
 LINKMASK  [^ \t\n\r\\@<&${}]+("("[^\n)]*")")?({BLANK}*("const"|"volatile"){BLANK}+)? 
 VERBATIM  "verbatim"{BLANK}*
-SPCMD1    {CMD}([a-z_A-Z][a-z_A-Z0-9]*|{VERBATIM})
+SPCMD1    {CMD}([a-z_A-Z][a-z_A-Z0-9]*|{VERBATIM}|"--"|"---")
 SPCMD2    {CMD}[\\@<>&$#%~".|]
 SPCMD3    {CMD}form#[0-9]+
 SPCMD4    {CMD}"::"

src/htmlentity.cpp

@@ -311,7 +311,8 @@ static struct htmlEntityInfo
   { SYM(DoubleColon), "::",        "::",         "::",                   "::",            "::",                     "::",     "::",          { "::",         DocSymbol::Perl_string  }},
   { SYM(Percent),  "%",            "%",          "%",                    "%",             "\\%",                    "%",      "%",           { "%",          DocSymbol::Perl_char    }},
   { SYM(Pipe),     "|",            "|",          "|",                    "|",             "$|$",                    "|",      "|",           { "|",          DocSymbol::Perl_char    }},
-  { SYM(Quot),     "\"",           "\"",         "\"",                   """,        "\"",                     "\"",     "\"",          { "\"",         DocSymbol::Perl_char    }}
+  { SYM(Quot),     "\"",           "\"",         "\"",                   """,        "\"",                     "\"",     "\"",          { "\"",         DocSymbol::Perl_char    }},
+  { SYM(Minus),    "-",            "-",          "-",                    "-",             "-\\/",                   "-",      "-",           { "-",          DocSymbol::Perl_char    }}
 };
 
 static const int g_numHtmlEntities = (int)(sizeof(g_htmlEntities)/ sizeof(*g_htmlEntities));

src/markdown.cpp

@@ -1004,6 +1004,16 @@ static int processSpecialCommand(GrowBuf &out, const char *data, int offset, int
     if (c=='[' || c==']' || c=='*' || c=='+' || c=='-' ||
         c=='!' || c=='(' || c==')' || c=='.' || c=='`' || c=='_') 
     {
+      if (c=='-' && size>3 && data[2]=='-' && data[3]=='-') // \---
+      {
+        out.addStr(&data[1],3);
+        return 4;
+      }
+      else if (c=='-' && size>2 && data[2]=='-') // \--
+      {
+        out.addStr(&data[1],2);
+        return 3;
+      }
       out.addStr(&data[1],1);
       return 2;
     }