make QT_TR_NOOP work in static initializers

do that by ignoring all equal signs and everything between and
including brackets. this makes static initializers look
effectively like function definitions, thus creating proper
context.

Task-number: QTBUG-9276

1 files changed, 47 insertions, 6 deletions

diff --git a/tools/linguist/lupdate/cpp.cpp b/tools/linguist/lupdate/cpp.cpp
index 3422212..4791450 100644
--- a/tools/linguist/lupdate/cpp.cpp
+++ b/tools/linguist/lupdate/cpp.cpp
@@ -212,13 +212,15 @@ public:
 private:
     struct IfdefState {
         IfdefState() {}
-        IfdefState(int _braceDepth, int _parenDepth) :
+        IfdefState(int _bracketDepth, int _braceDepth, int _parenDepth) :
+            bracketDepth(_bracketDepth),
             braceDepth(_braceDepth),
             parenDepth(_parenDepth),
             elseLine(-1)
         {}
 
         SavedState state;
+        int bracketDepth, bracketDepth1st;
         int braceDepth, braceDepth1st;
         int parenDepth, parenDepth1st;
         int elseLine;
@@ -280,7 +282,7 @@ private:
         Tok_tr, Tok_trUtf8, Tok_translate, Tok_translateUtf8, Tok_trid,
         Tok_Q_OBJECT, Tok_Q_DECLARE_TR_FUNCTIONS,
         Tok_Ident, Tok_Comment, Tok_String, Tok_Arrow, Tok_Colon, Tok_ColonColon,
-        Tok_Equals,
+        Tok_Equals, Tok_LeftBracket, Tok_RightBracket,
         Tok_LeftBrace, Tok_RightBrace, Tok_LeftParen, Tok_RightParen, Tok_Comma, Tok_Semicolon,
         Tok_Null, Tok_Integer,
         Tok_QuotedInclude, Tok_AngledInclude,
@@ -296,10 +298,12 @@ private:
     QString yyWord;
     qlonglong yyInteger;
     QStack<IfdefState> yyIfdefStack;
+    int yyBracketDepth;
     int yyBraceDepth;
     int yyParenDepth;
     int yyLineNo;
     int yyCurLineNo;
+    int yyBracketLineNo;
     int yyBraceLineNo;
     int yyParenLineNo;
 
@@ -336,9 +340,11 @@ CppParser::CppParser(ParseResults *_results)
         results = new ParseResults;
         directInclude = false;
     }
+    yyBracketDepth = 0;
     yyBraceDepth = 0;
     yyParenDepth = 0;
     yyCurLineNo = 1;
+    yyBracketLineNo = 1;
     yyBraceLineNo = 1;
     yyParenLineNo = 1;
     yyAtNewline = true;
@@ -565,7 +571,7 @@ uint CppParser::getToken()
                 yyCh = getChar();
                 if (yyCh == 'f') {
                     // if, ifdef, ifndef
-                    yyIfdefStack.push(IfdefState(yyBraceDepth, yyParenDepth));
+                    yyIfdefStack.push(IfdefState(yyBracketDepth, yyBraceDepth, yyParenDepth));
                     yyCh = getChar();
                 } else if (yyCh == 'n') {
                     // include
@@ -604,16 +610,20 @@ uint CppParser::getToken()
                     if (!yyIfdefStack.isEmpty()) {
                         IfdefState &is = yyIfdefStack.top();
                         if (is.elseLine != -1) {
-                            if (yyBraceDepth != is.braceDepth1st || yyParenDepth != is.parenDepth1st)
-                                qWarning("%s:%d: Parenthesis/brace mismatch between "
+                            if (yyBracketDepth != is.bracketDepth1st
+                                || yyBraceDepth != is.braceDepth1st
+                                || yyParenDepth != is.parenDepth1st)
+                                qWarning("%s:%d: Parenthesis/bracket/brace mismatch between "
                                          "#if and #else branches; using #if branch\n",
                                          qPrintable(yyFileName), is.elseLine);
                         } else {
+                            is.bracketDepth1st = yyBracketDepth;
                             is.braceDepth1st = yyBraceDepth;
                             is.parenDepth1st = yyParenDepth;
                             saveState(&is.state);
                         }
                         is.elseLine = yyLineNo;
+                        yyBracketDepth = is.bracketDepth;
                         yyBraceDepth = is.braceDepth;
                         yyParenDepth = is.parenDepth;
                     }
@@ -623,10 +633,13 @@ uint CppParser::getToken()
                     if (!yyIfdefStack.isEmpty()) {
                         IfdefState is = yyIfdefStack.pop();
                         if (is.elseLine != -1) {
-                            if (yyBraceDepth != is.braceDepth1st || yyParenDepth != is.parenDepth1st)
+                            if (yyBracketDepth != is.bracketDepth1st
+                                || yyBraceDepth != is.braceDepth1st
+                                || yyParenDepth != is.parenDepth1st)
                                 qWarning("%s:%d: Parenthesis/brace mismatch between "
                                          "#if and #else branches; using #if branch\n",
                                          qPrintable(yyFileName), is.elseLine);
+                            yyBracketDepth = is.bracketDepth1st;
                             yyBraceDepth = is.braceDepth1st;
                             yyParenDepth = is.parenDepth1st;
                             loadState(&is.state);
@@ -899,6 +912,21 @@ uint CppParser::getToken()
                     yyParenDepth--;
                 yyCh = getChar();
                 return Tok_RightParen;
+            case '[':
+                if (yyBracketDepth == 0)
+                    yyBracketLineNo = yyCurLineNo;
+                yyBracketDepth++;
+                yyCh = getChar();
+                return Tok_LeftBracket;
+            case ']':
+                if (yyBracketDepth == 0)
+                    qWarning("%s:%d: Excess closing bracket in C++ code"
+                             " (or abuse of the C++ preprocessor)\n",
+                             qPrintable(yyFileName), yyCurLineNo);
+                else
+                    yyBracketDepth--;
+                yyCh = getChar();
+                return Tok_RightBracket;
             case ',':
                 yyCh = getChar();
                 return Tok_Comma;
@@ -1534,6 +1562,12 @@ void CppParser::parseInternal(ConversionData &cd, QSet<QString> &inclusions)
     yyCh = getChar();
     yyTok = getToken();
     while (yyTok != Tok_Eof) {
+        // these are array indexing operations. we ignore them entirely
+        // so they don't confuse our scoping of static initializers.
+        // we enter the loop by either reading a left bracket or by an
+        // #else popping the state.
+        while (yyBracketDepth)
+            yyTok = getToken();
         //qDebug() << "TOKEN: " << yyTok;
         switch (yyTok) {
         case Tok_QuotedInclude: {
@@ -2074,6 +2108,9 @@ void CppParser::parseInternal(ConversionData &cd, QSet<QString> &inclusions)
         default:
             if (!yyParenDepth)
                 prospectiveContext.clear();
+            // fallthrough
+        case Tok_Equals: // for static initializers; other cases make no difference
+        case Tok_RightBracket: // ignoring indexing; same reason
         case_default:
             yyTok = getToken();
             break;
@@ -2088,6 +2125,10 @@ void CppParser::parseInternal(ConversionData &cd, QSet<QString> &inclusions)
         qWarning("%s:%d: Unbalanced opening parenthesis in C++ code"
                  " (or abuse of the C++ preprocessor)\n",
                  qPrintable(yyFileName), yyParenLineNo);
+    else if (yyBracketDepth != 0)
+        qWarning("%s:%d: Unbalanced opening bracket in C++ code"
+                 " (or abuse of the C++ preprocessor)\n",
+                 qPrintable(yyFileName), yyBracketLineNo);
 }
 
 const ParseResults *CppParser::recordResults(bool isHeader)