BASIC: Make TokenLabelInfo a singleton, never modified and simplify it.

Change-Id: Ie233aebc39f5b181087a64d3cf2053ef4ecbab91
Reviewed-on: https://gerrit.libreoffice.org/36829
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

2 files changed, 20 insertions, 31 deletions

diff --git a/basic/source/comp/token.cxx b/basic/source/comp/token.cxx
index b4de0f0d024a..4dc5d395340f 100644
--- a/basic/source/comp/token.cxx
+++ b/basic/source/comp/token.cxx
@@ -18,6 +18,8 @@
  */
 
 
+#include <array>
+
 #include "basiccharclass.hxx"
 #include "token.hxx"
 
@@ -182,31 +184,36 @@ static const TokenTable aTokTable_Basic [] = {
     { NIL,      "" }
 };
 
+// #i109076
+class TokenLabelInfo
+{
+    std::array<bool,VBASUPPORT+1> m_pTokenCanBeLabelTab;
+
+public:
+    TokenLabelInfo();
+
+    bool canTokenBeLabel( SbiToken eTok )
+        { return m_pTokenCanBeLabelTab[eTok]; }
+};
+
+class StaticTokenLabelInfo: public ::rtl::Static< TokenLabelInfo, StaticTokenLabelInfo >{};
 
 // #i109076
 TokenLabelInfo::TokenLabelInfo()
 {
-    m_pTokenCanBeLabelTab.reset( new bool[VBASUPPORT+1] );
-    for( int i = 0 ; i <= VBASUPPORT ; ++i )
-    {
-        m_pTokenCanBeLabelTab[i] = false;
-    }
+    m_pTokenCanBeLabelTab.fill(false);
+
     // Token accepted as label by VBA
-    SbiToken eLabelToken[] = { ACCESS, ALIAS, APPEND, BASE, BINARY, CLASSMODULE,
+    static const SbiToken eLabelToken[] = { ACCESS, ALIAS, APPEND, BASE, BINARY, CLASSMODULE,
                                COMPARE, COMPATIBLE, DEFERR, ERROR_, BASIC_EXPLICIT, LIB, LINE, LPRINT, NAME,
                                TOBJECT, OUTPUT, PROPERTY, RANDOM, READ, STEP, STOP, TEXT, VBASUPPORT, NIL };
     SbiToken eTok;
-    for( SbiToken* pTok = eLabelToken ; (eTok = *pTok) != NIL ; ++pTok )
+    for( const SbiToken* pTok = eLabelToken ; (eTok = *pTok) != NIL ; ++pTok )
     {
         m_pTokenCanBeLabelTab[eTok] = true;
     }
 }
 
-TokenLabelInfo::~TokenLabelInfo()
-{
-}
-
-
 // the constructor detects the length of the token table
 
 SbiTokenizer::SbiTokenizer( const OUString& rSrc, StarBASIC* pb )
@@ -542,7 +549,7 @@ special:
 
 bool SbiTokenizer::MayBeLabel( bool bNeedsColon )
 {
-    if( eCurTok == SYMBOL || m_aTokenLabelInfo.canTokenBeLabel( eCurTok ) )
+    if( eCurTok == SYMBOL || StaticTokenLabelInfo::get().canTokenBeLabel( eCurTok ) )
     {
         return !bNeedsColon || DoesColonFollow();
     }
diff --git a/basic/source/inc/token.hxx b/basic/source/inc/token.hxx
index 3ac72d52429f..6f850b814d89 100644
--- a/basic/source/inc/token.hxx
+++ b/basic/source/inc/token.hxx
@@ -114,25 +114,7 @@ enum SbiToken {
 #undef SbiTokenSHAREDTMPUNDEF
 #endif
 
-// #i109076
-class TokenLabelInfo
-{
-    std::unique_ptr<bool[]> m_pTokenCanBeLabelTab;
-
-public:
-    TokenLabelInfo();
-    TokenLabelInfo( const TokenLabelInfo& rInfo )
-        : m_pTokenCanBeLabelTab( nullptr )
-            { (void)rInfo; }
-    ~TokenLabelInfo();
-
-    bool canTokenBeLabel( SbiToken eTok )
-        { return m_pTokenCanBeLabelTab[eTok]; }
-};
-
 class SbiTokenizer : public SbiScanner {
-    TokenLabelInfo  m_aTokenLabelInfo;
-
 protected:
     SbiToken eCurTok;
     SbiToken ePush;