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Fix #7959 invalidPrintfArgType_uint false positive #8534

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Fix #7959 invalidPrintfArgType_uint false positive #8534

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d3a5a90
Update checkio.cpp
chrchr-github May 6, 2026
51ba854
Update testio.cpp
chrchr-github May 6, 2026
4ad6cb1
Update testio.cpp
chrchr-github May 6, 2026
20d3a29
Update checkio.cpp
chrchr-github May 6, 2026
658022f
Merge branch 'cppcheck-opensource:main' into chr_7959
chrchr-github May 6, 2026
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5 changes: 3 additions & 2 deletions lib/checkio.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1539,9 +1539,10 @@ CheckIO::ArgumentInfo::ArgumentInfo(const Token * arg, const Settings &settings,
if (element && isStdVectorOrString()) { // isStdVectorOrString sets type token if true
element = false; // not really an array element
} else if (variableInfo->isEnumType()) {
if (variableInfo->type() && variableInfo->type()->classScope && variableInfo->type()->classScope->enumType)
const bool hasEnumType = variableInfo->type() && variableInfo->type()->classScope && variableInfo->type()->classScope->enumType;
if (hasEnumType && variableInfo->type()->classScope->enumType->isStandardType())
typeToken = variableInfo->type()->classScope->enumType;
else {
else if (!hasEnumType) {
tempToken = new Token(tok1);
tempToken->str("int");
typeToken = tempToken;
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14 changes: 14 additions & 0 deletions test/testio.cpp
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Expand Up @@ -3371,6 +3371,20 @@ class TestIO : public TestFixture {
"}");
ASSERT_EQUALS("", errout_str());

check("enum E : uint8_t { E0 }; \n" // #7959
"void f(E e) {\n"
" printf(\"%hhu\", e);\n"
"}");
ASSERT_EQUALS("", errout_str());

check("enum E : uint8_t { E0 }; \n"
"void f(E e) {\n"
" printf(\"%lu\", e);\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:3]: (warning) %lu in format string (no. 1) requires 'unsigned long' but the argument type is 'uint8_t'.\n",
"",
errout_str());

check("void f() {\n"
" printf(\"%lu\", sizeof(char));\n"
"}\n", dinit(CheckOptions, $.portability = true, $.platform = Platform::Type::Win64));
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