qdoc: Allow formal parameters in link targets

This update allows qdoc to handle \l commands for linking
to functions, where the formal parameters are included in
the link target.

For example, \l {QWidget::find(QString name)} will only match
a member function of QWidget that has a single parameter of type
QString. The parameter name is not used in the search.

Change-Id: I8a31c9a7ed632f12a0e6d8a33cbb5cd361098317
Task-number: QTBUG-47286
Reviewed-by: Martin Smith <martin.smith@digia.com>

1 files changed, 51 insertions, 23 deletions

diff --git a/src/tools/qdoc/cppcodeparser.cpp b/src/tools/qdoc/cppcodeparser.cpp
index cab416370a..8d9596c10b 100644
--- a/src/tools/qdoc/cppcodeparser.cpp
+++ b/src/tools/qdoc/cppcodeparser.cpp
@@ -54,6 +54,7 @@ static bool inMacroCommand_ = false;
 static bool parsingHeaderFile_ = false;
 QStringList CppCodeParser::exampleFiles;
 QStringList CppCodeParser::exampleDirs;
+CppCodeParser* CppCodeParser::cppParser_ = 0;
 
 /*!
   The constructor initializes some regular expressions
@@ -63,6 +64,7 @@ CppCodeParser::CppCodeParser()
     : varComment("/\\*\\s*([a-zA-Z_0-9]+)\\s*\\*/"), sep("(?:<[^>]+>)?::")
 {
     reset();
+    cppParser_ = this;
 }
 
 /*!
@@ -374,12 +376,12 @@ Node* CppCodeParser::processTopicCommand(const Doc& doc,
             }
             else {
                 func->setMetaness(FunctionNode::MacroWithParams);
-                QList<Parameter> params = func->parameters();
+                QVector<Parameter> params = func->parameters();
                 for (int i = 0; i < params.size(); ++i) {
                     Parameter &param = params[i];
-                    if (param.name().isEmpty() && !param.leftType().isEmpty()
-                            && param.leftType() != "...")
-                        param = Parameter("", "", param.leftType());
+                    if (param.name().isEmpty() && !param.dataType().isEmpty()
+                            && param.dataType() != "...")
+                        param = Parameter("", "", param.dataType());
                 }
                 func->setParameters(params);
             }
@@ -1308,23 +1310,23 @@ bool CppCodeParser::matchDataType(CodeChunk *dataType, QString *var)
 
 /*!
   Parse the next function parameter, if there is one, and
-  append it to parameter list \a p. Return true if a parameter
-  is parsed and appended to \a p. Otherwise return false.
+  append it to parameter vector \a pvect. Return true if
+  a parameter is parsed and appended to \a pvect.
+  Otherwise return false.
  */
-bool CppCodeParser::matchParameter(ParsedParameterList& pplist)
+bool CppCodeParser::matchParameter(QVector<Parameter>& pvect, bool& isQPrivateSignal)
 {
-    ParsedParameter pp;
     if (match(Tok_QPrivateSignal)) {
-        pp.qPrivateSignal_ = true;
-        pplist.append(pp);
+        isQPrivateSignal = true;
         return true;
     }
 
+    Parameter p;
     CodeChunk chunk;
-    if (!matchDataType(&chunk, &pp.name_)) {
+    if (!matchDataType(&chunk, &p.name_)) {
         return false;
     }
-    pp.dataType_ = chunk.toString();
+    p.dataType_ = chunk.toString();
     chunk.clear();
     match(Tok_Comment);
     if (match(Tok_Equal)) {
@@ -1336,8 +1338,8 @@ bool CppCodeParser::matchParameter(ParsedParameterList& pplist)
             readToken();
         }
     }
-    pp.defaultValue_ = chunk.toString();
-    pplist.append(pp);
+    p.defaultValue_ = chunk.toString();
+    pvect.append(p);
     return true;
 }
 
@@ -1542,10 +1544,11 @@ bool CppCodeParser::matchFunctionDecl(Aggregate *parent,
     readToken();
 
     // A left paren was seen. Parse the parameters
-    ParsedParameterList pplist;
+    bool isQPrivateSignal = false;
+    QVector<Parameter> pvect;
     if (tok != Tok_RightParen) {
         do {
-            if (!matchParameter(pplist))
+            if (!matchParameter(pvect, isQPrivateSignal))
                 return false;
         } while (match(Tok_Comma));
     }
@@ -1629,13 +1632,10 @@ bool CppCodeParser::matchFunctionDecl(Aggregate *parent,
         func->setStatic(matched_static);
         func->setConst(matchedConst);
         func->setVirtualness(virtuality);
-        if (!pplist.isEmpty()) {
-            foreach (const ParsedParameter& pp, pplist) {
-                if (pp.qPrivateSignal_)
-                    func->setPrivateSignal();
-                else
-                    func->addParameter(Parameter(pp.dataType_, "", pp.name_, pp.defaultValue_));
-            }
+        if (isQPrivateSignal)
+            func->setPrivateSignal();
+        if (!pvect.isEmpty()) {
+            func->setParameters(pvect);
         }
     }
     if (parentPathPtr != 0)
@@ -2417,6 +2417,34 @@ bool CppCodeParser::makeFunctionNode(const QString& signature,
 }
 
 /*!
+  This function uses a Tokenizer to parse the \a parameters of a
+  function into the parameter vector \a {pvect}.
+ */
+bool CppCodeParser::parseParameters(const QString& parameters,
+                                    QVector<Parameter>& pvect,
+                                    bool& isQPrivateSignal)
+{
+    Tokenizer* outerTokenizer = tokenizer;
+    int outerTok = tok;
+
+    QByteArray latin1 = parameters.toLatin1();
+    Tokenizer stringTokenizer(Location(), latin1);
+    stringTokenizer.setParsingFnOrMacro(true);
+    tokenizer = &stringTokenizer;
+    readToken();
+
+    inMacroCommand_ = false;
+    do {
+        if (!matchParameter(pvect, isQPrivateSignal))
+            return false;
+    } while (match(Tok_Comma));
+
+    tokenizer = outerTokenizer;
+    tok = outerTok;
+    return true;
+}
+
+/*!
   Create a new FunctionNode for a QML method or signal, as
   specified by \a type, as a child of \a parent. \a sig is
   the complete signature, and if \a attached is true, the