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Partial fix for #10057 unused variable without assignment not detected (#4348) 

* Partial fix for #10057 unused variable without assignment not detected

* Add test for #9672
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chrchr-github 2022-08-13 08:29:06 +02:00 committed by GitHub
parent c54b3f4de0
commit afef71f6b6
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3 changed files with 35 additions and 4 deletions
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9
lib/checkother.cpp
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@ -2054,11 +2054,12 @@ void CheckOther::checkMisusedScopedObject()
const SymbolDatabase * const symbolDatabase = mTokenizer->getSymbolDatabase();
for (const Scope * scope : symbolDatabase->functionScopes) {
for (const Token *tok = scope->bodyStart; tok && tok != scope->bodyEnd; tok = tok->next()) {
if ((tok->next()->type() || (tok->next()->function() && tok->next()->function()->isConstructor())) // TODO: The rhs of || should be removed; It is a workaround for a symboldatabase bug
&& Token::Match(tok, "[;{}] %name% (")
&& Token::Match(tok->linkAt(2), ") ; !!}")
if ((tok->next()->type() || tok->next()->isStandardType() || (tok->next()->function() && tok->next()->function()->isConstructor())) // TODO: The rhs of || should be removed; It is a workaround for a symboldatabase bug
&& Token::Match(tok, "[;{}] %name% (|{")
&& Token::Match(tok->linkAt(2), ")|} ; !!}")
&& (!tok->next()->function() || // is not a function on this scope
tok->next()->function()->isConstructor())) { // or is function in this scope and it's a ctor
tok->next()->function()->isConstructor()) // or is function in this scope and it's a ctor
&& (!tok->tokAt(2)->astOperand2() || isConstStatement(tok->tokAt(2)->astOperand2(), mTokenizer->isCPP()))) {
tok = tok->next();
misusedScopeObjectError(tok, tok->str());
tok = tok->next();

9
test/cfg/windows.cpp
View File

@ -15,6 +15,7 @@
#include <memory.h>
#include <mbstring.h>
#include <wchar.h>
#include <atlstr.h>
int stringCompare_mbscmp(const unsigned char *string1, const unsigned char *string2)
{
@ -1102,3 +1103,11 @@ public:
IMPLEMENT_DYNAMIC(MyClass, CObject)
IMPLEMENT_DYNCREATE(MyClass, CObject)
IMPLEMENT_SERIAL(MyClass,CObject, 42)
void invalidPrintfArgType_StructMember(double d) { // #9672
typedef struct { CString st; } my_struct_t;
my_struct_t my_struct;
// cppcheck-suppress invalidPrintfArgType_sint
my_struct.st.Format("%d", d);
}

21
test/testother.cpp
View File

@ -139,6 +139,7 @@ private:
TEST_CASE(testMisusedScopeObjectDoesNotPickNestedClass);
TEST_CASE(testMisusedScopeObjectInConstructor);
TEST_CASE(testMisusedScopeObjectNoCodeAfter);
TEST_CASE(testMisusedScopeObjectStandardType);
TEST_CASE(trac2071);
TEST_CASE(trac2084);
TEST_CASE(trac3693);
@ -5031,6 +5032,26 @@ private:
ASSERT_EQUALS("", errout.str());
}
void testMisusedScopeObjectStandardType() {
check("int g();\n"
"void f(int i) {\n"
" int();\n"
" int(0);\n"
" int( g() );\n" // don't warn
" int{};\n"
" int{ 0 };\n"
" int{ i };\n"
" int{ g() };\n" // don't warn
" g();\n"
"}\n", "test.cpp");
ASSERT_EQUALS("[test.cpp:3]: (style) Instance of 'int' object is destroyed immediately.\n"
"[test.cpp:4]: (style) Instance of 'int' object is destroyed immediately.\n"
"[test.cpp:6]: (style) Instance of 'int' object is destroyed immediately.\n"
"[test.cpp:7]: (style) Instance of 'int' object is destroyed immediately.\n"
"[test.cpp:8]: (style) Instance of 'int' object is destroyed immediately.\n",
errout.str());
}
void trac2084() {
check("void f()\n"
"{\n"