Loading clang/docs/ReleaseNotes.rst +59 −0 Original line number Diff line number Diff line Loading @@ -64,15 +64,74 @@ about them. The improvements since the 3.3 release include: - -Wheader-guard warns on mismatches between the #ifndef and #define lines in a header guard. .. code-block:: c #ifndef multiple #define multi #endif returns `warning: 'multiple' is used as a header guard here, followed by #define of a different macro [-Wheader-guard]` - -Wlogical-not-parentheses warns when a logical not ('!') only applies to the left-hand side of a comparison. This warning is part of -Wparentheses. .. code-block:: c++ int i1 = 0, i2 = 1; bool ret; ret = !i1 == i2; returns `warning: logical not is only applied to the left hand side of this comparison [-Wlogical-not-parentheses]` - Boolean increment, a deprecated feature, has own warning flag -Wdeprecated-increment-bool, and is still part of -Wdeprecated. - Clang errors on builtin enum increments and decrements. .. code-block:: c++ enum A { A1, A2 }; void test() { A a; a++; } returns `error: must use 'enum' tag to refer to type 'A'` - -Wloop-analysis now warns on for-loops which have the same increment or decrement in the loop header as the last statement in the loop. .. code-block:: c void foo(char *a, char *b, unsigned c) { for (unsigned i = 0; i < c; ++i) { a[i] = b[i]; ++i; } } returns `warning: variable 'i' is incremented both in the loop header and in the loop body [-Wloop-analysis]` - -Wuninitialized now performs checking across field initializers to detect when one field in used uninitialized in another field initialization. .. code-block:: c++ class A { int x; int y; A() : x(y) {} }; returns `warning: field 'y' is uninitialized when used here [-Wuninitialized]` - Clang can detect initializer list use inside a macro and suggest parentheses if possible to fix. - Many improvements to Clang's typo correction facilities, such as: Loading Loading
clang/docs/ReleaseNotes.rst +59 −0 Original line number Diff line number Diff line Loading @@ -64,15 +64,74 @@ about them. The improvements since the 3.3 release include: - -Wheader-guard warns on mismatches between the #ifndef and #define lines in a header guard. .. code-block:: c #ifndef multiple #define multi #endif returns `warning: 'multiple' is used as a header guard here, followed by #define of a different macro [-Wheader-guard]` - -Wlogical-not-parentheses warns when a logical not ('!') only applies to the left-hand side of a comparison. This warning is part of -Wparentheses. .. code-block:: c++ int i1 = 0, i2 = 1; bool ret; ret = !i1 == i2; returns `warning: logical not is only applied to the left hand side of this comparison [-Wlogical-not-parentheses]` - Boolean increment, a deprecated feature, has own warning flag -Wdeprecated-increment-bool, and is still part of -Wdeprecated. - Clang errors on builtin enum increments and decrements. .. code-block:: c++ enum A { A1, A2 }; void test() { A a; a++; } returns `error: must use 'enum' tag to refer to type 'A'` - -Wloop-analysis now warns on for-loops which have the same increment or decrement in the loop header as the last statement in the loop. .. code-block:: c void foo(char *a, char *b, unsigned c) { for (unsigned i = 0; i < c; ++i) { a[i] = b[i]; ++i; } } returns `warning: variable 'i' is incremented both in the loop header and in the loop body [-Wloop-analysis]` - -Wuninitialized now performs checking across field initializers to detect when one field in used uninitialized in another field initialization. .. code-block:: c++ class A { int x; int y; A() : x(y) {} }; returns `warning: field 'y' is uninitialized when used here [-Wuninitialized]` - Clang can detect initializer list use inside a macro and suggest parentheses if possible to fix. - Many improvements to Clang's typo correction facilities, such as: Loading
