assignif: Fixed testcase. parse while loops if variable is local and not external.
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@ -36,6 +36,8 @@ void CheckAssignIf::assignIf()
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if (!_settings->isEnabled("style"))
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if (!_settings->isEnabled("style"))
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return;
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return;
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const SymbolDatabase *symbolDatabase = _tokenizer->getSymbolDatabase();
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for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
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for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
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if (tok->str() != "=")
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if (tok->str() != "=")
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continue;
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continue;
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@ -51,7 +53,12 @@ void CheckAssignIf::assignIf()
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if (num < 0)
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if (num < 0)
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continue;
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continue;
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assignIfParseScope(tok, tok->tokAt(4), varid, bitop, num);
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bool islocal = false;
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const Variable *var = symbolDatabase->getVariableFromVarId(varid);
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if (var && var->isLocal())
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islocal = true;
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assignIfParseScope(tok, tok->tokAt(4), varid, islocal, bitop, num);
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}
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}
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}
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}
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}
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}
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@ -60,6 +67,7 @@ void CheckAssignIf::assignIf()
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bool CheckAssignIf::assignIfParseScope(const Token * const assignTok,
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bool CheckAssignIf::assignIfParseScope(const Token * const assignTok,
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const Token * const startTok,
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const Token * const startTok,
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const unsigned int varid,
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const unsigned int varid,
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const bool islocal,
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const char bitop,
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const char bitop,
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const MathLib::bigint num)
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const MathLib::bigint num)
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{
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{
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@ -68,7 +76,10 @@ bool CheckAssignIf::assignIfParseScope(const Token * const assignTok,
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return true;
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return true;
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if (tok2->str() == "}")
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if (tok2->str() == "}")
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return false;
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return false;
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if (Token::Match(tok2, "if (")) {
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if (Token::Match(tok2, "if|while (")) {
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if (!islocal && tok2->str() == "while")
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continue;
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// parse condition
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// parse condition
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const Token * const end = tok2->next()->link();
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const Token * const end = tok2->next()->link();
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for (; tok2 != end; tok2 = tok2->next()) {
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for (; tok2 != end; tok2 = tok2->next()) {
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@ -87,10 +98,10 @@ bool CheckAssignIf::assignIfParseScope(const Token * const assignTok,
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}
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}
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}
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}
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bool ret1 = assignIfParseScope(assignTok, end->tokAt(2), varid, bitop, num);
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bool ret1 = assignIfParseScope(assignTok, end->tokAt(2), varid, islocal, bitop, num);
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bool ret2 = false;
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bool ret2 = false;
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if (Token::simpleMatch(end->next()->link(), "} else {"))
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if (Token::simpleMatch(end->next()->link(), "} else {"))
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ret2 = assignIfParseScope(assignTok, end->next()->link()->tokAt(3), varid, bitop, num);
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ret2 = assignIfParseScope(assignTok, end->next()->link()->tokAt(3), varid, islocal, bitop, num);
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if (ret1 || ret2)
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if (ret1 || ret2)
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return true;
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return true;
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}
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}
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@ -59,6 +59,7 @@ public:
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bool assignIfParseScope(const Token * const assignTok,
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bool assignIfParseScope(const Token * const assignTok,
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const Token * const startTok,
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const Token * const startTok,
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const unsigned int varid,
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const unsigned int varid,
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const bool islocal,
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const char bitop,
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const char bitop,
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const MathLib::bigint num);
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const MathLib::bigint num);
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@ -119,7 +119,7 @@ private:
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" int y = x & 7;\n"
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" int y = x & 7;\n"
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" while (y==8);\n" // local variable => always false
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" while (y==8);\n" // local variable => always false
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"}");
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"}");
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ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:4]: (style) Mismatching assignment and comparison, comparison 'y==8' is always false.\n", errout.str());
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ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:3]: (style) Mismatching assignment and comparison, comparison 'y==8' is always false.\n", errout.str());
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check("void f(int x) {\n"
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check("void f(int x) {\n"
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" extern int y; y = x & 7;\n"
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" extern int y; y = x & 7;\n"
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