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loplugin:passstuffbyref improved return in canvas and svtools

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and for now, ignore methods with params so we don't fall into the trap
of thinking that calls to methods like:
   Bar& foo(Bar &p) { return p; }
can be converted from
   Bar f() { return foo(Bar()); }
to
Bar const & f() { return foo(Bar()); }

Change-Id: Ia3795eb2baf353cb6bec4ebf40451f2789d66ad7
Reviewed-on: https://gerrit.libreoffice.org/47034
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
This commit is contained in:
Noel Grandin
2017-12-25 19:21:12 +02:00
parent 09895ae496
commit c54d34f708
25 changed files with 39 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
canvas/source/cairo/cairo_canvasfont.cxx
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@@ -146,7 +146,7 @@ namespace cairocanvas
return { "com.sun.star.rendering.CanvasFont" };
}
vcl::Font CanvasFont::getVCLFont() const
vcl::Font const & CanvasFont::getVCLFont() const
{
return *maFont;
}

2
canvas/source/cairo/cairo_canvasfont.hxx
View File

@@ -72,7 +72,7 @@ namespace cairocanvas
virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
vcl::Font getVCLFont() const;
vcl::Font const & getVCLFont() const;
private:
::canvas::vcltools::VCLObject<vcl::Font> maFont;

2
canvas/source/cairo/cairo_devicehelper.cxx
View File

@@ -223,7 +223,7 @@ namespace cairocanvas
};
}
uno::Reference<rendering::XColorSpace> DeviceHelper::getColorSpace() const
uno::Reference<rendering::XColorSpace> const & DeviceHelper::getColorSpace() const
{
// always the same
return DeviceColorSpace::get();

2
canvas/source/cairo/cairo_devicehelper.hxx
View File

@@ -83,7 +83,7 @@ namespace cairocanvas
css::uno::Any getDeviceHandle() const;
css::uno::Any getSurfaceHandle() const;
css::uno::Reference<
css::rendering::XColorSpace > getColorSpace() const;
css::rendering::XColorSpace > const & getColorSpace() const;
/** called when DumpScreenContent property is enabled on
XGraphicDevice, and writes out bitmaps of current screen.

4
canvas/source/cairo/cairo_spritecanvas.cxx
View File

@@ -173,12 +173,12 @@ namespace cairocanvas
return maDeviceHelper.getOutputDevice();
}
SurfaceSharedPtr SpriteCanvas::getBufferSurface()
SurfaceSharedPtr const & SpriteCanvas::getBufferSurface()
{
return maDeviceHelper.getBufferSurface();
}
SurfaceSharedPtr SpriteCanvas::getWindowSurface()
SurfaceSharedPtr const & SpriteCanvas::getWindowSurface()
{
return maDeviceHelper.getWindowSurface();
}

4
canvas/source/cairo/cairo_spritecanvas.hxx
View File

@@ -142,8 +142,8 @@ namespace cairocanvas
const css::rendering::ViewState& viewState,
const css::rendering::RenderState& renderState ) override;
::cairo::SurfaceSharedPtr getWindowSurface();
::cairo::SurfaceSharedPtr getBufferSurface();
::cairo::SurfaceSharedPtr const & getWindowSurface();
::cairo::SurfaceSharedPtr const & getBufferSurface();
const ::basegfx::B2ISize& getSizePixel();
void setSizePixel( const ::basegfx::B2ISize& rSize );

2
canvas/source/cairo/cairo_spritedevicehelper.cxx
View File

@@ -124,7 +124,7 @@ namespace cairocanvas
setSize( ::basegfx::B2ISize(rBounds.Width, rBounds.Height) );
}
SurfaceSharedPtr SpriteDeviceHelper::getWindowSurface()
SurfaceSharedPtr const & SpriteDeviceHelper::getWindowSurface()
{
return DeviceHelper::getSurface();
}

2
canvas/source/cairo/cairo_spritedevicehelper.hxx
View File

@@ -61,7 +61,7 @@ namespace cairocanvas
void setSize( const ::basegfx::B2ISize& rSize );
const ::cairo::SurfaceSharedPtr& getBufferSurface() { return mpBufferSurface; }
::cairo::SurfaceSharedPtr getWindowSurface();
::cairo::SurfaceSharedPtr const & getWindowSurface();
::cairo::SurfaceSharedPtr createSurface( const ::basegfx::B2ISize& rSize, int aContent );
::cairo::SurfaceSharedPtr createSurface( BitmapSystemData const & rData, const Size& rSize );
const ::basegfx::B2ISize& getSizePixel() { return maSize; }

4
canvas/source/tools/canvastools.cxx
View File

@@ -863,12 +863,12 @@ namespace canvas
};
}
uno::Reference<rendering::XIntegerBitmapColorSpace> getStdColorSpace()
uno::Reference<rendering::XIntegerBitmapColorSpace> const & getStdColorSpace()
{
return StandardColorSpaceHolder::get();
}
uno::Reference<rendering::XIntegerBitmapColorSpace> getStdColorSpaceWithoutAlpha()
uno::Reference<rendering::XIntegerBitmapColorSpace> const & getStdColorSpaceWithoutAlpha()
{
return StandardNoAlphaColorSpaceHolder::get();
}

2
canvas/source/vcl/canvasfont.cxx
View File

@@ -159,7 +159,7 @@ namespace vclcanvas
return { "com.sun.star.rendering.CanvasFont" };
}
vcl::Font CanvasFont::getVCLFont() const
vcl::Font const & CanvasFont::getVCLFont() const
{
return *maFont;
}

2
canvas/source/vcl/canvasfont.hxx
View File

@@ -75,7 +75,7 @@ namespace vclcanvas
virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
vcl::Font getVCLFont() const;
vcl::Font const & getVCLFont() const;
private:
::canvas::vcltools::VCLObject<vcl::Font> maFont;

2
canvas/source/vcl/devicehelper.cxx
View File

@@ -189,7 +189,7 @@ namespace vclcanvas
};
}
uno::Reference<rendering::XColorSpace> DeviceHelper::getColorSpace() const
uno::Reference<rendering::XColorSpace> const & DeviceHelper::getColorSpace() const
{
// always the same
return DeviceColorSpace::get();

2
canvas/source/vcl/devicehelper.hxx
View File

@@ -75,7 +75,7 @@ namespace vclcanvas
css::uno::Any getDeviceHandle() const;
css::uno::Any getSurfaceHandle() const;
css::uno::Reference<
css::rendering::XColorSpace > getColorSpace() const;
css::rendering::XColorSpace > const & getColorSpace() const;
const OutDevProviderSharedPtr& getOutDev() const { return mpOutDev; }

4
canvas/source/vcl/spritecanvas.hxx
View File

@@ -143,9 +143,9 @@ namespace vclcanvas
const GraphicAttr& rAttr ) const override;
/// Get backbuffer for this canvas
OutDevProviderSharedPtr getFrontBuffer() const { return maDeviceHelper.getOutDev(); }
OutDevProviderSharedPtr const & getFrontBuffer() const { return maDeviceHelper.getOutDev(); }
/// Get window for this canvas
BackBufferSharedPtr getBackBuffer() const { return maDeviceHelper.getBackBuffer(); }
BackBufferSharedPtr const & getBackBuffer() const { return maDeviceHelper.getBackBuffer(); }
private:
css::uno::Sequence< css::uno::Any > maArguments;

6
compilerplugins/clang/passstuffbyref.cxx
View File

@@ -402,6 +402,12 @@ bool PassStuffByRef::isReturnExprDisqualified(const Expr* expr)
FunctionDecl const * calleeFunctionDecl = callExpr->getDirectCallee();
if (!calleeFunctionDecl)
return true;
// TODO anything takes a param is suspect because it might return the param by ref.
// we could tighten this to only reject functions that have a param of the same type
// as the return type. Or we could check for such functions and disallow them.
// Or we could force such functions to be annotated somehow.
if (calleeFunctionDecl->getNumParams() > 0)
return true;
auto tc = loplugin::TypeCheck(calleeFunctionDecl->getReturnType());
if (!tc.LvalueReference() && !tc.Pointer())
return true;

3
compilerplugins/clang/test/passstuffbyref.cxx
View File

@@ -15,6 +15,7 @@
struct S1 {
OUString mv1;
OUString const & get() const { return mv1; }
OUString const & get2(bool) const { return mv1; }
};
struct S2 {
OUString mv1;
@@ -40,6 +41,8 @@ struct S2 {
// TODO
OUString get10() { return OUString(*&get6()); } // todoexpected-error {{rather return class rtl::OUString by const& than by value, to avoid unnecessary copying [loplugin:passstuffbyref]}}
OUString get11() const { return mxCow->get(); } // expected-error {{rather return class rtl::OUString by const& than by value, to avoid unnecessary copying [loplugin:passstuffbyref]}}
// TODO anything takes a param is suspect because it might return the param by ref
OUString get12() { return child.get2(false); } // todoexpected-error {{rather return class rtl::OUString by const& than by value, to avoid unnecessary copying [loplugin:passstuffbyref]}}
// no warning expected
OUString set1() { return OUString("xxx"); }

4
include/canvas/canvastools.hxx
View File

@@ -329,7 +329,7 @@ namespace canvas
Use this method for dead-simple bitmap implementations,
that map all their formats to 8888 RGBA color.
*/
CANVASTOOLS_DLLPUBLIC css::uno::Reference< css::rendering::XIntegerBitmapColorSpace> getStdColorSpace();
CANVASTOOLS_DLLPUBLIC css::uno::Reference< css::rendering::XIntegerBitmapColorSpace> const & getStdColorSpace();
/** Return a color space for a default RGB integer format
@@ -337,7 +337,7 @@ namespace canvas
that map all their formats to 8888 RGB color (the last byte
is unused).
*/
CANVASTOOLS_DLLPUBLIC css::uno::Reference< css::rendering::XIntegerBitmapColorSpace> getStdColorSpaceWithoutAlpha();
CANVASTOOLS_DLLPUBLIC css::uno::Reference< css::rendering::XIntegerBitmapColorSpace> const & getStdColorSpaceWithoutAlpha();
/** Return a memory layout for a default RGBA integer format

2
include/svtools/helpopt.hxx
View File

@@ -44,7 +44,7 @@ public:
const OUString& GetHelpStyleSheet()const;
void SetHelpStyleSheet(const OUString& rStyleSheet);
OUString GetSystem() const;
OUString const & GetSystem() const;
};
#endif

2
include/svtools/hyperlabel.hxx
View File

@@ -69,7 +69,7 @@ namespace svt
void SetClickHdl( const Link<HyperLabel*,void>& rLink ) { maClickHdl = rLink; }
Size CalcMinimumSize( long nMaxWidth ) const;
Size const & CalcMinimumSize( long nMaxWidth ) const;
};
}

4
include/svtools/treelistbox.hxx
View File

@@ -697,7 +697,7 @@ public:
void SetCollapsedNodeBmp( const Image& );
void SetExpandedNodeBmp( const Image& );
Image GetExpandedNodeBmp( ) const;
Image const & GetExpandedNodeBmp( ) const;
void SetFont( const vcl::Font& rFont );
@@ -796,7 +796,7 @@ public:
void LoseFocus();
bool EditingCanceled() const { return bCanceled; }
OUString GetText() const;
OUString GetSavedValue() const;
OUString const & GetSavedValue() const;
void StopEditing( bool bCancel );
void Hide();
};

2
svtools/inc/roadmap.hxx
View File

@@ -72,7 +72,7 @@ public:
bool SelectRoadmapItemByID( ItemId _nItemID );
void SetItemSelectHdl( const Link<LinkParamNone*,void>& _rHdl );
Link<LinkParamNone*,void> GetItemSelectHdl( ) const;
Link<LinkParamNone*,void> const & GetItemSelectHdl( ) const;
virtual void DataChanged( const DataChangedEvent& rDCEvt ) override;
virtual void GetFocus() override;
virtual void ApplySettings( vcl::RenderContext& rRenderContext ) override;

2
svtools/source/config/helpopt.cxx
View File

@@ -279,7 +279,7 @@ bool SvtHelpOptions::IsHelpTips() const
return pImpl->IsHelpTips();
}
OUString SvtHelpOptions::GetSystem() const
OUString const & SvtHelpOptions::GetSystem() const
{
return pImpl->GetSystem();
}

4
svtools/source/contnr/treelistbox.cxx
View File

@@ -140,7 +140,7 @@ SvInplaceEdit2::~SvInplaceEdit2()
pEdit.disposeAndClear();
}
OUString SvInplaceEdit2::GetSavedValue() const
OUString const & SvInplaceEdit2::GetSavedValue() const
{
return pEdit->GetSavedValue();
}
@@ -2420,7 +2420,7 @@ void SvTreeListBox::SetCurEntry( SvTreeListEntry* pEntry )
pImpl->SetCurEntry( pEntry );
}
Image SvTreeListBox::GetExpandedNodeBmp( ) const
Image const & SvTreeListBox::GetExpandedNodeBmp( ) const
{
return pImpl->GetExpandedNodeBmp( );
}

2
svtools/source/control/hyperlabel.cxx
View File

@@ -54,7 +54,7 @@ namespace svt
implInit();
}
Size HyperLabel::CalcMinimumSize( long nMaxWidth ) const
Size const & HyperLabel::CalcMinimumSize( long nMaxWidth ) const
{
m_pImpl->m_aMinSize = FixedText::CalcMinimumSize( nMaxWidth );
// the MinimumSize is used to size the FocusRectangle

2
svtools/source/control/roadmap.cxx
View File

@@ -507,7 +507,7 @@ void ORoadmap::SetItemSelectHdl(const Link<LinkParamNone*,void>& _rHdl)
m_pImpl->setSelectHdl(_rHdl);
}
Link<LinkParamNone*,void> ORoadmap::GetItemSelectHdl() const
Link<LinkParamNone*,void> const & ORoadmap::GetItemSelectHdl() const
{
return m_pImpl->getSelectHdl();
}