//---------------------------------------------------------------------------
// Check that all struct members are used
//---------------------------------------------------------------------------
void CheckUnusedVar::checkStructMemberUsage()
{
if (!_settings->isEnabled("style"))
return;
std::string structname;
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
if (tok->fileIndex() != 0)
continue;
if (Token::Match(tok, "struct|union %type% {")) {
structname = tok->strAt(1);
// Bail out if struct/union contain any functions
for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next()) {
if (tok2->str() == "(") {
structname.clear();
break;
}
if (tok2->str() == "}")
break;
}
// bail out if struct is inherited
if (!structname.empty() && Token::findmatch(tok, (",|private|protected|public " + structname).c_str()))
structname.clear();
// Bail out if some data is casted to struct..
const std::string s("( struct| " + tok->next()->str() + " * ) & %name% [");
if (Token::findmatch(tok, s.c_str()))
structname.clear();
// Bail out if instance is initialized with {}..
if (!structname.empty()) {
const std::string pattern1(structname + " %name% ;");
const Token *tok2 = tok;
while (nullptr != (tok2 = Token::findmatch(tok2->next(), pattern1.c_str()))) {
if (Token::simpleMatch(tok2->tokAt(3), (tok2->strAt(1) + " = {").c_str())) {
structname.clear();
break;
}
}
}
// bail out for extern/global struct
for (const Token *tok2 = Token::findmatch(tok, (structname + " %name%").c_str());
tok2 && tok2->next();
tok2 = Token::findmatch(tok2->next(), (structname + " %name%").c_str())) {
const Variable *var = tok2->next()->variable();
if (var && (var->isExtern() || (var->isGlobal() && !var->isStatic()))) {
structname.clear();
break;
}
}
if (structname.empty())
continue;
// Try to prevent false positives when struct members are not used directly.
if (Token::findmatch(tok, (structname + " *").c_str()))
structname.clear();
else if (Token::findmatch(tok, (structname + " %type% *").c_str()))
structname = "";
}
if (tok->str() == "}")
structname.clear();
if (!structname.empty() && Token::Match(tok, "[{;]")) {
// Declaring struct variable..
std::string varname;
// declaring a POD variable?
if (!tok->next()->isStandardType())
continue;
if (Token::Match(tok->next(), "%type% %name% [;[]"))
varname = tok->strAt(2);
else if (Token::Match(tok->next(), "%type% %type%|* %name% [;[]"))
varname = tok->strAt(3);
else if (Token::Match(tok->next(), "%type% %type% * %name% [;[]"))
varname = tok->strAt(4);
else
continue;
// Check if the struct variable is used anywhere in the file
const std::string usagePattern(". " + varname);
bool used = false;
for (const Token *tok2 = _tokenizer->tokens(); tok2; tok2 = tok2->next()) {
if (Token::simpleMatch(tok2, usagePattern.c_str())) {
used = true;
break;
}
}
if (! used) {
unusedStructMemberError(tok->next(), structname, varname);
}
}
}
}
//---------------------------------------------------------------------------
// Check that all struct members are used
//---------------------------------------------------------------------------
void CheckUnusedVar::checkStructMemberUsage()
{
if (!_settings->isEnabled("style"))
return;
std::string structname;
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
if (tok->fileIndex() != 0)
continue;
if (Token::Match(tok, "struct|union %type% {")) {
structname.clear();
if (tok->strAt(-1) == "extern")
continue;
if ((!tok->previous() || tok->previous()->str() == ";") && Token::Match(tok->linkAt(2), ("} ; " + tok->strAt(1) + " %var% ;").c_str()))
continue;
structname = tok->strAt(1);
// Bail out if struct/union contain any functions
for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next()) {
if (tok2->str() == "(") {
structname.clear();
break;
}
if (tok2->str() == "}")
break;
}
// bail out if struct is inherited
if (!structname.empty() && Token::findmatch(tok, (",|private|protected|public " + structname).c_str()))
structname.clear();
// Bail out if some data is casted to struct..
const std::string s("( struct| " + tok->next()->str() + " * ) & %var% [");
if (Token::findmatch(tok, s.c_str()))
structname.clear();
// Try to prevent false positives when struct members are not used directly.
if (Token::findmatch(tok, (structname + " *").c_str()))
structname.clear();
else if (Token::findmatch(tok, (structname + " %type% *").c_str()))
structname = "";
}
if (tok->str() == "}")
structname.clear();
if (!structname.empty() && Token::Match(tok, "[{;]")) {
// Declaring struct variable..
std::string varname;
// declaring a POD variable?
if (!tok->next()->isStandardType())
continue;
if (Token::Match(tok->next(), "%type% %var% [;[]"))
varname = tok->strAt(2);
else if (Token::Match(tok->next(), "%type% %type% %var% [;[]"))
varname = tok->strAt(3);
else if (Token::Match(tok->next(), "%type% * %var% [;[]"))
varname = tok->strAt(3);
else if (Token::Match(tok->next(), "%type% %type% * %var% [;[]"))
varname = tok->strAt(4);
else
continue;
// Check if the struct variable is used anywhere in the file
const std::string usagePattern(". " + varname);
bool used = false;
for (const Token *tok2 = _tokenizer->tokens(); tok2; tok2 = tok2->next()) {
if (Token::simpleMatch(tok2, usagePattern.c_str())) {
used = true;
break;
}
}
if (! used) {
unusedStructMemberError(tok->next(), structname, varname);
}
}
}
}
