init variables where they are declared when possible (clang-tidy)

clang-tidy -p compile_commands.json $file -checks='-*,modernize-use-default-member-init,readability-redundant-member-init'
 -config='{CheckOptions: [{key: modernize-use-default-member-init.UseAssignment, value: "1"}]}' -header-filter='qtdeclarative' -fix

Change-Id: I705f3235ff129ba68b0d8dad54a083e29fcead5f
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

3 files changed, 13 insertions, 21 deletions

diff --git a/src/qml/parser/qqmljsast_p.h b/src/qml/parser/qqmljsast_p.h
index acbd88d466..ed3c83badf 100644
--- a/src/qml/parser/qqmljsast_p.h
+++ b/src/qml/parser/qqmljsast_p.h
@@ -224,8 +224,7 @@ public:
         Kind_UiEnumMemberList
     };
 
-    inline Node()
-        : kind(Kind_Undefined) {}
+    inline Node() {}
 
     // NOTE: node destructors are never called,
     //       instead we block free the memory
@@ -248,7 +247,7 @@ public:
     virtual SourceLocation lastSourceLocation() const = 0;
 
 // attributes
-    int kind;
+    int kind = Kind_Undefined;
 };
 
 class QML_PARSER_EXPORT ExpressionNode: public Node
@@ -489,8 +488,8 @@ class QML_PARSER_EXPORT ObjectLiteral: public ExpressionNode
 public:
     QQMLJS_DECLARE_AST_NODE(ObjectLiteral)
 
-    ObjectLiteral():
-        properties (nullptr) { kind = K; }
+    ObjectLiteral()
+        { kind = K; }
 
     ObjectLiteral(PropertyAssignmentList *plist):
         properties (plist) { kind = K; }
@@ -504,7 +503,7 @@ public:
     { return rbraceToken; }
 
 // attributes
-    PropertyAssignmentList *properties;
+    PropertyAssignmentList *properties = nullptr;
     SourceLocation lbraceToken;
     SourceLocation rbraceToken;
 };
diff --git a/src/qml/parser/qqmljsengine_p.h b/src/qml/parser/qqmljsengine_p.h
index 8cbe69a0ba..af26bac0ff 100644
--- a/src/qml/parser/qqmljsengine_p.h
+++ b/src/qml/parser/qqmljsengine_p.h
@@ -71,8 +71,7 @@ class QML_PARSER_EXPORT DiagnosticMessage
 public:
     enum Kind { Warning, Error };
 
-    DiagnosticMessage()
-        : kind(Error) {}
+    DiagnosticMessage() {}
 
     DiagnosticMessage(Kind kind, const AST::SourceLocation &loc, const QString &message)
         : kind(kind), loc(loc), message(message) {}
@@ -83,7 +82,7 @@ public:
     bool isError() const
     { return kind == Error; }
 
-    Kind kind;
+    Kind kind = Error;
     AST::SourceLocation loc;
     QString message;
 };
diff --git a/src/qml/parser/qqmljsmemorypool_p.h b/src/qml/parser/qqmljsmemorypool_p.h
index 5682d66f45..ef443d96bc 100644
--- a/src/qml/parser/qqmljsmemorypool_p.h
+++ b/src/qml/parser/qqmljsmemorypool_p.h
@@ -71,13 +71,7 @@ class QML_PARSER_EXPORT MemoryPool : public QSharedData
     void operator =(const MemoryPool &other);
 
 public:
-    MemoryPool()
-        : _blocks(nullptr),
-          _allocatedBlocks(0),
-          _blockCount(-1),
-          _ptr(nullptr),
-          _end(nullptr)
-    { }
+    MemoryPool() {}
 
     ~MemoryPool()
     {
@@ -144,11 +138,11 @@ private:
     }
 
 private:
-    char **_blocks;
-    int _allocatedBlocks;
-    int _blockCount;
-    char *_ptr;
-    char *_end;
+    char **_blocks = nullptr;
+    int _allocatedBlocks = 0;
+    int _blockCount = -1;
+    char *_ptr = nullptr;
+    char *_end = nullptr;
 
     enum
     {