remove pointless return value from QMakeParser::read()

it always returned true nowadays.

an obvious followup effect is that the return value of parsedProBlock()
doesn't need to be null-checked any more as well.

Change-Id: I782785cab9b721a78a342a010921a73e642ebe7f
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
(cherry picked from qtbase/030c3a6197da663e5d2df48b9130ef71ee22e86c)

src/shared/proparser/qmakebuiltins.cpp

@@ -1199,15 +1199,13 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateBuiltinConditional(
             VisitReturn ret = ReturnFalse;
             ProFile *pro = m_parser->parsedProBlock(args.join(statics.field_sep),
                                                     m_current.pro->fileName(), m_current.line);
-            if (pro) {
-                if (m_cumulative || pro->isOk()) {
-                    m_locationStack.push(m_current);
-                    visitProBlock(pro, pro->tokPtr());
-                    ret = ReturnTrue; // This return value is not too useful, but that's qmake
-                    m_current = m_locationStack.pop();
-                }
-                pro->deref();
+            if (m_cumulative || pro->isOk()) {
+                m_locationStack.push(m_current);
+                visitProBlock(pro, pro->tokPtr());
+                ret = ReturnTrue; // This return value is not too useful, but that's qmake
+                m_current = m_locationStack.pop();
             }
+            pro->deref();
             return ret;
         }
     case T_IF: {

src/shared/proparser/qmakeevaluator.cpp

@@ -1315,14 +1315,13 @@ void QMakeEvaluator::setupProject()
 void QMakeEvaluator::evaluateCommand(const QString &cmds, const QString &where)
 {
     if (!cmds.isEmpty()) {
-        if (ProFile *pro = m_parser->parsedProBlock(cmds, where, -1)) {
-            if (pro->isOk()) {
-                m_locationStack.push(m_current);
-                visitProBlock(pro, pro->tokPtr());
-                m_current = m_locationStack.pop();
-            }
-            pro->deref();
+        ProFile *pro = m_parser->parsedProBlock(cmds, where, -1);
+        if (pro->isOk()) {
+            m_locationStack.push(m_current);
+            visitProBlock(pro, pro->tokPtr());
+            m_current = m_locationStack.pop();
         }
+        pro->deref();
     }
 }
 
@@ -1802,14 +1801,12 @@ bool QMakeEvaluator::evaluateConditional(const QString &cond, const QString &whe
 {
     bool ret = false;
     ProFile *pro = m_parser->parsedProBlock(cond, where, line, QMakeParser::TestGrammar);
-    if (pro) {
-        if (pro->isOk()) {
-            m_locationStack.push(m_current);
-            ret = visitProBlock(pro, pro->tokPtr()) == ReturnTrue;
-            m_current = m_locationStack.pop();
-        }
-        pro->deref();
+    if (pro->isOk()) {
+        m_locationStack.push(m_current);
+        ret = visitProBlock(pro, pro->tokPtr()) == ReturnTrue;
+        m_current = m_locationStack.pop();
     }
+    pro->deref();
     return ret;
 }
 

src/shared/proparser/qmakeparser.cpp

@@ -229,10 +229,7 @@ ProFile *QMakeParser::parsedProBlock(
         const QString &contents, const QString &name, int line, SubGrammar grammar)
 {
     ProFile *pro = new ProFile(name);
-    if (!read(pro, contents, line, grammar)) {
-        delete pro;
-        pro = 0;
-    }
+    read(pro, contents, line, grammar);
     return pro;
 }
 
@@ -252,7 +249,8 @@ bool QMakeParser::read(ProFile *pro, ParseFlags flags)
                                fL1S("Cannot read %1: %2").arg(pro->fileName(), errStr));
         return false;
     }
-    return read(pro, content, 1, FullGrammar);
+    read(pro, content, 1, FullGrammar);
+    return true;
 }
 
 void QMakeParser::putTok(ushort *&tokPtr, ushort tok)
@@ -292,7 +290,7 @@ void QMakeParser::finalizeHashStr(ushort *buf, uint len)
     buf[-2] = (ushort)(hash >> 16);
 }
 
-bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar grammar)
+void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar grammar)
 {
     m_proFile = pro;
     m_lineNo = line;
@@ -865,7 +863,6 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
         leaveScope(tokPtr);
     tokBuff.resize(tokPtr - (ushort *)tokBuff.constData()); // Reserved capacity stays
     *pro->itemsRef() = tokBuff;
-    return true;
 
 #undef FLUSH_VALUE_LIST
 #undef FLUSH_LITERAL

src/shared/proparser/qmakeparser.h

@@ -127,7 +127,7 @@ private:
     };
 
     bool read(ProFile *pro, ParseFlags flags);
-    bool read(ProFile *pro, const QString &content, int line, SubGrammar grammar);
+    void read(ProFile *pro, const QString &content, int line, SubGrammar grammar);
 
     ALWAYS_INLINE void putTok(ushort *&tokPtr, ushort tok);
     ALWAYS_INLINE void putBlockLen(ushort *&tokPtr, uint len);