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Copy pathtestbool.cpp
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1269 lines (1084 loc) · 46.3 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2021 Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "checkbool.h"
#include "settings.h"
#include "testsuite.h"
#include "tokenize.h"
class TestBool : public TestFixture {
public:
TestBool() : TestFixture("TestBool") {}
private:
Settings settings;
void run() OVERRIDE {
settings.severity.enable(Severity::style);
settings.severity.enable(Severity::warning);
settings.certainty.enable(Certainty::inconclusive);
TEST_CASE(bitwiseOnBoolean); // if (bool & bool)
TEST_CASE(incrementBoolean);
TEST_CASE(assignBoolToPointer);
TEST_CASE(assignBoolToFloat);
TEST_CASE(comparisonOfBoolExpressionWithInt1);
TEST_CASE(comparisonOfBoolExpressionWithInt2);
TEST_CASE(comparisonOfBoolExpressionWithInt3);
TEST_CASE(comparisonOfBoolExpressionWithInt4);
TEST_CASE(comparisonOfBoolWithInt1);
TEST_CASE(comparisonOfBoolWithInt2);
TEST_CASE(comparisonOfBoolWithInt3);
TEST_CASE(comparisonOfBoolWithInt4);
TEST_CASE(comparisonOfBoolWithInt5);
TEST_CASE(comparisonOfBoolWithInt6); // #4224 - integer is casted to bool
TEST_CASE(comparisonOfBoolWithInt7); // #4846 - (!x == true)
TEST_CASE(comparisonOfBoolWithInt8); // #9165
TEST_CASE(comparisonOfBoolWithInt9); // #9304
TEST_CASE(checkComparisonOfFuncReturningBool1);
TEST_CASE(checkComparisonOfFuncReturningBool2);
TEST_CASE(checkComparisonOfFuncReturningBool3);
TEST_CASE(checkComparisonOfFuncReturningBool4);
TEST_CASE(checkComparisonOfFuncReturningBool5);
TEST_CASE(checkComparisonOfFuncReturningBool6);
// Integration tests..
TEST_CASE(checkComparisonOfFuncReturningBoolIntegrationTest1); // #7798 overloaded functions
TEST_CASE(checkComparisonOfBoolWithBool);
// Converting pointer addition result to bool
TEST_CASE(pointerArithBool1);
TEST_CASE(returnNonBool);
TEST_CASE(returnNonBoolLambda);
TEST_CASE(returnNonBoolLogicalOp);
TEST_CASE(returnNonBoolClass);
}
#define check(...) check_(__FILE__, __LINE__, __VA_ARGS__)
void check_(const char* file, int line, const char code[], bool experimental = false, const char filename[] = "test.cpp") {
// Clear the error buffer..
errout.str("");
settings.certainty.setEnabled(Certainty::experimental, experimental);
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
ASSERT_LOC(tokenizer.tokenize(istr, filename), file, line);
// Check...
CheckBool checkBool(&tokenizer, &settings, this);
checkBool.runChecks(&tokenizer, &settings, this);
}
void assignBoolToPointer() {
check("void foo(bool *p) {\n"
" p = false;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Boolean value assigned to pointer.\n", errout.str());
check("void foo(bool *p) {\n"
" p = (x<y);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Boolean value assigned to pointer.\n", errout.str());
check("void foo(bool *p) {\n"
" p = (x||y);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Boolean value assigned to pointer.\n", errout.str());
check("void foo(bool *p) {\n"
" p = (x&&y);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Boolean value assigned to pointer.\n", errout.str());
// check against potential false positives
check("void foo(bool *p) {\n"
" *p = false;\n"
"}");
ASSERT_EQUALS("", errout.str());
// ticket #5046 - false positive: Boolean value assigned to pointer
check("struct S {\n"
" bool *p;\n"
"};\n"
"void f() {\n"
" S s = {0};\n"
" *s.p = true;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("struct S {\n"
" bool *p;\n"
"};\n"
"void f() {\n"
" S s = {0};\n"
" s.p = true;\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Boolean value assigned to pointer.\n", errout.str());
// ticket #5627 - false positive: template
check("void f() {\n"
" X *p = new ::std::pair<int,int>[rSize];\n"
"}");
ASSERT_EQUALS("", errout.str());
// ticket #6588 (c mode)
check("struct MpegEncContext { int *q_intra_matrix, *q_chroma_intra_matrix; };\n"
"void dnxhd_10bit_dct_quantize(MpegEncContext *ctx, int n, int qscale) {\n"
" const int *qmat = n < 4;\n" /* KO */
" const int *rmat = n < 4 ? " /* OK */
" ctx->q_intra_matrix :"
" ctx->q_chroma_intra_matrix;\n"
"}", /*experimental=*/ false, "test.c");
ASSERT_EQUALS("[test.c:3]: (error) Boolean value assigned to pointer.\n", errout.str());
// ticket #6588 (c++ mode)
check("struct MpegEncContext { int *q_intra_matrix, *q_chroma_intra_matrix; };\n"
"void dnxhd_10bit_dct_quantize(MpegEncContext *ctx, int n, int qscale) {\n"
" const int *qmat = n < 4;\n" /* KO */
" const int *rmat = n < 4 ? " /* OK */
" ctx->q_intra_matrix :"
" ctx->q_chroma_intra_matrix;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Boolean value assigned to pointer.\n", errout.str());
// ticket #6665
check("void pivot_big(char *first, int compare(const void *, const void *)) {\n"
" char *a = first, *b = first + 1, *c = first + 2;\n"
" char* m1 = compare(a, b) < 0\n"
" ? (compare(b, c) < 0 ? b : (compare(a, c) < 0 ? c : a))\n"
" : (compare(a, c) < 0 ? a : (compare(b, c) < 0 ? c : b));\n"
"}", /*experimental=*/ false, "test.c");
ASSERT_EQUALS("", errout.str());
// #7381
check("void foo(bool *p, bool b) {\n"
" p = b;\n"
" p = &b;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Boolean value assigned to pointer.\n", errout.str());
}
void assignBoolToFloat() {
check("void foo1() {\n"
" double d = false;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Boolean value assigned to floating point variable.\n", errout.str());
check("void foo2() {\n"
" float d = true;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Boolean value assigned to floating point variable.\n", errout.str());
check("void foo3() {\n"
" long double d = (2>1);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Boolean value assigned to floating point variable.\n", errout.str());
// stability - don't crash:
check("void foo4() {\n"
" unknown = false;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("struct S {\n"
" float p;\n"
"};\n"
"void f() {\n"
" S s = {0};\n"
" s.p = true;\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (style) Boolean value assigned to floating point variable.\n", errout.str());
check("struct S {\n"
" float* p[1];\n"
"};\n"
"void f() {\n"
" S s = {0};\n"
" *s.p[0] = true;\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (style) Boolean value assigned to floating point variable.\n", errout.str());
}
void comparisonOfBoolExpressionWithInt1() {
check("void f(int x) {\n"
" if ((x && 0x0f)==6)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if ((x && 0x0f)==0)\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if ((x || 0x0f)==6)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if ((x || 0x0f)==0)\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if ((x & 0x0f)==6)\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if ((x | 0x0f)==6)\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if ((5 && x)==3)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if ((5 && x)==3 || (8 && x)==9)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if ((5 && x)!=3)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if ((5 && x) > 3)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if ((5 && x) > 0)\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if ((5 && x) < 0)\n"
" a++;\n"
"}"
);
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer.\n", errout.str());
check("void f(int x) {\n"
" if ((5 && x) < 1)\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if ((5 && x) > 1)\n"
" a++;\n"
"}"
);
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer.\n", errout.str());
check("void f(int x) {\n"
" if (0 < (5 && x))\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if (0 > (5 && x))\n"
" a++;\n"
"}"
);
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer.\n", errout.str());
check("void f(int x) {\n"
" if (1 > (5 && x))\n"
" a++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if (1 < (5 && x))\n"
" a++;\n"
"}"
);
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer.\n", errout.str());
check("void f(bool x ) {\n"
" if ( x > false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(bool x ) {\n"
" if ( false < x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(bool x ) {\n"
" if ( x < false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(bool x ) {\n"
" if ( false > x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(bool x ) {\n"
" if ( x >= false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(bool x ) {\n"
" if ( false >= x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(bool x ) {\n"
" if ( x <= false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(bool x ) {\n"
" if ( false <= x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("typedef int (*func)(bool invert);\n"
"void x(int, func f);\n"
"void foo(int error) {\n"
" if (error == ABC) { }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int f() { return !a+b<c; }"); // #5072
ASSERT_EQUALS("",errout.str());
check("int f() { return (!a+b<c); }");
ASSERT_EQUALS("",errout.str());
check("int f() { return (a+(b<5)<=c); }");
ASSERT_EQUALS("",errout.str());
}
void comparisonOfBoolExpressionWithInt2() {
check("void f(int x) {\n"
" if (!x == 10) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if (!x != 10) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if (x != 10) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if (10 == !x) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x) {\n"
" if (10 != !x) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int x, int y) {\n"
" if (y != !x) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x, bool y) {\n"
" if (y != !x) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x) {\n"
" if (10 != x) {\n"
" printf(\"x not equal to 10\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x, int y) {\n"
" return (!y == !x);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int f(int a) {\n"
" return (x()+1 == !a);\n"
"}");
TODO_ASSERT_EQUALS("error", "", errout.str());
check("void f() { if (!!a+!!b+!!c>1){} }");
ASSERT_EQUALS("",errout.str());
check("void f(int a, int b, int c) { if (a != !b || c) {} }");
ASSERT_EQUALS("",errout.str());
check("void f(int a, int b, int c) { if (1 < !!a + !!b + !!c) {} }");
ASSERT_EQUALS("",errout.str());
check("void f(int a, int b, int c) { if (1 < !(a+b)) {} }");
ASSERT_EQUALS("[test.cpp:1]: (warning) Comparison of a boolean expression with an integer.\n",errout.str());
}
void comparisonOfBoolExpressionWithInt3() {
check("int f(int x) {\n"
" return t<0>() && x;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void comparisonOfBoolExpressionWithInt4() {
// #5016
check("void f() {\n"
" for(int i = 4; i > -1 < 5 ; --i) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(int a, int b, int c) {\n"
" return (a > b) < c;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int a, int b, int c) {\n"
" return x(a > b) < c;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int a, int b, int c) {\n"
" return a > b == c;\n"
"}");
ASSERT_EQUALS("", errout.str());
// templates
check("struct Tokenizer { TokenList list; };\n"
"void Tokenizer::f() {\n"
" std::list<Token*> locationList;\n"
"}");
ASSERT_EQUALS("", errout.str());
// #5063 - or
check("void f() {\n"
" return a > b or c < d;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int f() {\n"
" return (a < b) != 0U;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int f() {\n"
" return (a < b) != 0x0;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int f() {\n"
" return (a < b) != 42U;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
}
void checkComparisonOfFuncReturningBool1() {
check("void f(){\n"
" int temp = 4;\n"
" if(compare1(temp) > compare2(temp)){\n"
" printf(\"foo\");\n"
" }\n"
"}\n"
"bool compare1(int temp){\n"
" if(temp==4){\n"
" return true;\n"
" }\n"
" else\n"
" return false;\n"
"}\n"
"bool compare2(int temp){\n"
" if(temp==4){\n"
" return false;\n"
" }\n"
" else\n"
" return true;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator.\n", errout.str());
}
void checkComparisonOfFuncReturningBool2() {
check("void leftOfComparison(){\n"
" int temp = 4;\n"
" bool a = true;\n"
" if(compare(temp) > a){\n"
" printf(\"foo\");\n"
" }\n"
"}\n"
"void rightOfComparison(){\n"
" int temp = 4;\n"
" bool a = true;\n"
" if(a < compare(temp)){\n"
" printf(\"foo\");\n"
" }\n"
"}\n"
"bool compare(int temp){\n"
" if(temp==4){\n"
" return true;\n"
" }\n"
" else\n"
" return false;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator.\n"
"[test.cpp:11]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator.\n", errout.str());
}
void checkComparisonOfFuncReturningBool3() {
check("void f(){\n"
" int temp = 4;\n"
" if(compare(temp) > temp){\n"
" printf(\"foo\");\n"
" }\n"
"}\n"
"bool compare(int temp);");
ASSERT_EQUALS("[test.cpp:3]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n"
"[test.cpp:3]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator.\n", errout.str());
}
void checkComparisonOfFuncReturningBool4() {
check("void f(){\n"
" int temp = 4;\n"
" bool b = compare2(6);\n"
" if(compare1(temp)> b){\n"
" printf(\"foo\");\n"
" }\n"
"}\n"
"bool compare1(int temp){\n"
" if(temp==4){\n"
" return true;\n"
" }\n"
" else\n"
" return false;\n"
"}\n"
"bool compare2(int temp){\n"
" if(temp == 5){\n"
" return true;\n"
" }\n"
" else\n"
" return false;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator.\n", errout.str());
}
void checkComparisonOfFuncReturningBool5() {
check("void f(){\n"
" int temp = 4;\n"
" if(compare1(temp) > !compare2(temp)){\n"
" printf(\"foo\");\n"
" }\n"
"}\n"
"bool compare1(int temp){\n"
" if(temp==4){\n"
" return true;\n"
" }\n"
" else\n"
" return false;\n"
"}\n"
"bool compare2(int temp){\n"
" if(temp==4){\n"
" return false;\n"
" }\n"
" else\n"
" return true;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator.\n", errout.str());
}
void checkComparisonOfFuncReturningBool6() {
check("int compare1(int temp);\n"
"namespace Foo {\n"
" bool compare1(int temp);\n"
"}\n"
"void f(){\n"
" int temp = 4;\n"
" if(compare1(temp) > compare2(temp)){\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("namespace Foo {\n"
" bool compare1(int temp);\n"
"}\n"
"int compare1(int temp);\n"
"void f(){\n"
" int temp = 4;\n"
" if(compare1(temp) > compare2(temp)){\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int compare1(int temp);\n"
"namespace Foo {\n"
" bool compare1(int temp);\n"
" void f(){\n"
" int temp = 4;\n"
" if(compare1(temp) > compare2(temp)){\n"
" printf(\"foo\");\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator.\n", errout.str());
check("int compare1(int temp);\n"
"namespace Foo {\n"
" bool compare1(int temp);\n"
" void f(){\n"
" int temp = 4;\n"
" if(::compare1(temp) > compare2(temp)){\n"
" printf(\"foo\");\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("bool compare1(int temp);\n"
"void f(){\n"
" int temp = 4;\n"
" if(foo.compare1(temp) > compare2(temp)){\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void checkComparisonOfFuncReturningBoolIntegrationTest1() { // #7798
check("bool eval(double *) { return false; }\n"
"double eval(char *) { return 1.0; }\n"
"int main(int argc, char *argv[])\n"
"{\n"
" if ( eval(argv[1]) > eval(argv[2]) )\n"
" return 1;\n"
" return 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void checkComparisonOfBoolWithBool() {
const char code[] = "void f(){\n"
" int temp = 4;\n"
" bool b = compare2(6);\n"
" bool a = compare1(4);\n"
" if(b > a){\n"
" printf(\"foo\");\n"
" }\n"
"}\n"
"bool compare1(int temp){\n"
" if(temp==4){\n"
" return true;\n"
" }\n"
" else\n"
" return false;\n"
"}\n"
"bool compare2(int temp){\n"
" if(temp == 5){\n"
" return true;\n"
" }\n"
" else\n"
" return false;\n"
"}\n";
check(code, true);
ASSERT_EQUALS("[test.cpp:5]: (style) Comparison of a variable having boolean value using relational (<, >, <= or >=) operator.\n", errout.str());
check(code, false);
ASSERT_EQUALS("", errout.str());
}
void bitwiseOnBoolean() { // 3062
check("void f(_Bool a, _Bool b) {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'?\n", errout.str());
check("void f(_Bool a, _Bool b) {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'?\n", errout.str());
check("void f(bool a, bool b) {\n"
" if(a & !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'?\n", errout.str());
check("void f(bool a, bool b) {\n"
" if(a | !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'?\n", errout.str());
check("bool a, b;\n"
"void f() {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'?\n", errout.str());
check("bool a, b;\n"
"void f() {\n"
" if(a & !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'?\n", errout.str());
check("bool a, b;\n"
"void f() {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'?\n", errout.str());
check("bool a, b;\n"
"void f() {\n"
" if(a | !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'?\n", errout.str());
check("void f(bool a, int b) {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'?\n", errout.str());
check("void f(int a, bool b) {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'b' is used in bitwise operation. Did you mean '&&'?\n", errout.str());
check("void f(int a, int b) {\n"
" if((a > 0) & (b < 0)) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a>0' is used in bitwise operation. Did you mean '&&'?\n", errout.str());
check("void f(bool a, int b) {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'?\n", errout.str());
check("void f(int a, bool b) {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'b' is used in bitwise operation. Did you mean '||'?\n", errout.str());
check("int f(bool a, int b) {\n"
" return a | b;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("bool f(bool a, int b) {\n"
" return a | b;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'?\n", errout.str());
check("void f(int a, int b) {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool b) {\n"
" foo(bar, &b);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool b) {\n" // #9405
" class C { void foo(bool &b) {} };\n"
"}");
ASSERT_EQUALS("", errout.str());
check("bool f();\n"
"bool g() {\n"
" return f() | f();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("uint8 outcode(float p) {\n"
" float d = 0.;\n"
" return ((p - xm >= d) << 1) | (x - p > d);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void incrementBoolean() {
check("bool bValue = true;\n"
"void f() { bValue++; }");
ASSERT_EQUALS("[test.cpp:2]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead.\n", errout.str());
check("void f(bool test){\n"
" test++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead.\n", errout.str());
check("void f(bool* test){\n"
" (*test)++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead.\n", errout.str());
check("void f(bool* test){\n"
" test[0]++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead.\n", errout.str());
check("void f(int test){\n"
" test++;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void comparisonOfBoolWithInt1() {
check("void f(bool x) {\n"
" if (x < 10) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(bool x) {\n"
" if (10 >= x) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(bool x) {\n"
" if (x != 0) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool x) {\n" // #3356
" if (x == 1) {\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool x) {\n"
" if (x != 10) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(bool x) {\n"
" if (x == 10) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
check("void f(bool x) {\n"
" if (x == 0) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("DensePropertyMap<int, true> visited;"); // #4075
ASSERT_EQUALS("", errout.str());
}
void comparisonOfBoolWithInt2() {
check("void f(bool x, int y) {\n"
" if (x == y) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(int x, bool y) {\n"
" if (x == y) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool x, bool y) {\n"
" if (x == y) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool x, fooClass y) {\n"
" if (x == y) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void comparisonOfBoolWithInt3() {
check("void f(int y) {\n"
" if (y > false) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=).\n", errout.str());
check("void f(int y) {\n"
" if (true == y) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool y) {\n"
" if (y == true) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f(bool y) {\n"
" if (false < 5) {\n"
" printf(\"foo\");\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of a boolean expression with an integer other than 0 or 1.\n", errout.str());
}
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