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testbool.cpp
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1395 lines (1202 loc) · 54.9 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2025 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 "errortypes.h"
#include "fixture.h"
#include "helpers.h"
#include "settings.h"
#include <cstddef>
class TestBool : public TestFixture {
public:
TestBool() : TestFixture("TestBool") {}
private:
const Settings settings = settingsBuilder().severity(Severity::style).severity(Severity::warning).certainty(Certainty::inconclusive).build();
void run() override {
mNewTemplate = true;
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(comparisonOfBoolWithInt10); // #10935
TEST_CASE(checkComparisonOfFuncReturningBool1);
TEST_CASE(checkComparisonOfFuncReturningBool2);
TEST_CASE(checkComparisonOfFuncReturningBool3);
TEST_CASE(checkComparisonOfFuncReturningBool4);
TEST_CASE(checkComparisonOfFuncReturningBool5);
TEST_CASE(checkComparisonOfFuncReturningBool6);
TEST_CASE(checkComparisonOfFuncReturningBool7); // #7197
TEST_CASE(checkComparisonOfFuncReturningBool8); // #4103
// 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);
}
struct CheckOptions
{
bool cpp = true;
};
#define check(...) check_(__FILE__, __LINE__, __VA_ARGS__)
template<size_t size>
void check_(const char* file, int line, const char (&code)[size], const CheckOptions& options = make_default_obj()) {
// Tokenize..
SimpleTokenizer tokenizer(settings, *this, options.cpp);
ASSERT_LOC(tokenizer.tokenize(code), file, line);
// Check...
runChecks<CheckBool>(tokenizer, this);
}
void assignBoolToPointer() {
check("void foo(bool *p) {\n"
" p = false;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:7]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\n", errout_str());
check("void foo(bool *p) {\n"
" p = (x<y);\n"
"}");
ASSERT_EQUALS("[test.cpp:2:7]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\n", errout_str());
check("void foo(bool *p) {\n"
" p = (x||y);\n"
"}");
ASSERT_EQUALS("[test.cpp:2:7]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\n", errout_str());
check("void foo(bool *p) {\n"
" p = (x&&y);\n"
"}");
ASSERT_EQUALS("[test.cpp:2:7]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\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:6:9]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\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"
"}", dinit(CheckOptions, $.cpp = false));
ASSERT_EQUALS("[test.c:3:19]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\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:3:19]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\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"
"}", dinit(CheckOptions, $.cpp = false));
ASSERT_EQUALS("", errout_str());
// #7381
check("void foo(bool *p, bool b) {\n"
" p = b;\n"
" p = &b;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:7]: (error) Boolean value assigned to pointer. [assignBoolToPointer]\n", errout_str());
}
void assignBoolToFloat() {
check("void foo1() {\n"
" double d = false;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:14]: (style) Boolean value assigned to floating point variable. [assignBoolToFloat]\n", errout_str());
check("void foo2() {\n"
" float d = true;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:13]: (style) Boolean value assigned to floating point variable. [assignBoolToFloat]\n", errout_str());
check("void foo3() {\n"
" long double d = (2>1);\n"
"}");
ASSERT_EQUALS("[test.cpp:2:19]: (style) Boolean value assigned to floating point variable. [assignBoolToFloat]\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:6:9]: (style) Boolean value assigned to floating point variable. [assignBoolToFloat]\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:6:13]: (style) Boolean value assigned to floating point variable. [assignBoolToFloat]\n", errout_str());
}
void comparisonOfBoolExpressionWithInt1() {
check("void f(int x) {\n"
" if ((x && 0x0f)==6)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:20]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:2:20]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:2:17]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\n", errout_str());
check("void f(int x) {\n"
" if ((5 && x)==3 || (8 && x)==9)\n"
" a++;\n"
"}");
ASSERT_EQUALS(
"[test.cpp:2:17]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\n"
"[test.cpp:2:32]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\n", // duplicate
errout_str());
check("void f(int x) {\n"
" if ((5 && x)!=3)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:17]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\n", errout_str());
check("void f(int x) {\n"
" if ((5 && x) > 3)\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:18]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:2:18]: (warning) Comparison of a boolean expression with an integer. [compareBoolExpressionWithInt]\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:2:18]: (warning) Comparison of a boolean expression with an integer. [compareBoolExpressionWithInt]\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:2:11]: (warning) Comparison of a boolean expression with an integer. [compareBoolExpressionWithInt]\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:2:11]: (warning) Comparison of a boolean expression with an integer. [compareBoolExpressionWithInt]\n", errout_str());
check("void f(bool x ) {\n"
" if ( x > false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:12]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\n", errout_str());
check("void f(bool x ) {\n"
" if ( false < x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:16]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\n", errout_str());
check("void f(bool x ) {\n"
" if ( x < false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:12]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\n", errout_str());
check("void f(bool x ) {\n"
" if ( false > x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:16]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\n", errout_str());
check("void f(bool x ) {\n"
" if ( x >= false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:13]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\n", errout_str());
check("void f(bool x ) {\n"
" if ( false >= x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:17]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\n", errout_str());
check("void f(bool x ) {\n"
" if ( x <= false )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:13]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\n", errout_str());
check("void f(bool x ) {\n"
" if ( false <= x )\n"
" a++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:17]: (warning) Comparison of a boolean value using relational operator (<, >, <= or >=). [comparisonOfBoolWithInvalidComparator]\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); }");
AS
35AA
SERT_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:2:12]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:2:12]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:2:12]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:2:12]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:1:37]: (warning) Comparison of a boolean expression with an integer. [compareBoolExpressionWithInt]\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:2:25]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:2:18]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\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:3:17]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfTwoFuncsReturningBoolError]\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:4:12]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfFuncReturningBoolError]\n"
"[test.cpp:11:7]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfFuncReturningBoolError]\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:3:19]: (warning) Comparison of a boolean expression with an integer other than 0 or 1. [compareBoolExpressionWithInt]\n"
"[test.cpp:3:12]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfFuncReturningBoolError]\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:4:13]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfFuncReturningBoolError]\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:3:17]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfTwoFuncsReturningBoolError]\n", errout_str());
}
void checkComparisonOfFuncReturningBool6() {
35AA
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:6:20]: (style) Comparison of a function returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfFuncReturningBoolError]\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 checkComparisonOfFuncReturningBool7() { // #7197
check("struct C {\n"
" bool isEmpty();\n"
"};\n"
"void f() {\n"
" C c1, c2;\n"
" if ((c1.isEmpty()) < (c2.isEmpty())) {}\n"
" if (!c1.isEmpty() < !!c2.isEmpty()) {}\n"
" if ((int)c1.isEmpty() < (int)c2.isEmpty()) {}\n"
" if (static_cast<int>(c1.isEmpty()) < static_cast<int>(c2.isEmpty())) {}\n"
"}\n");
ASSERT_EQUALS("[test.cpp:6:20]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfTwoFuncsReturningBoolError]\n"
"[test.cpp:7:20]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfTwoFuncsReturningBoolError]\n"
"[test.cpp:8:24]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfTwoFuncsReturningBoolError]\n"
"[test.cpp:9:36]: (style) Comparison of two functions returning boolean value using relational (<, >, <= or >=) operator. [comparisonOfTwoFuncsReturningBoolError]\n",
errout_str());
}
void checkComparisonOfFuncReturningBool8() { // #4103
// op: >
check("int main(void){\n"
" bool a = true;\n"
" bool b = false;\n"
" if(b > a){ \n" // here warning should be displayed
" ;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:4:10]: (style) Comparison of a variable having boolean value using relational (<, >, <= or >=) operator. [comparisonOfBoolWithBoolError]\n", errout_str());
// op: <
check("int main(void){\n"
" bool a = true;\n"
" bool b = false;\n"
" if(b < a){ \n" // here warning should be displayed
" ;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:4:10]: (style) Comparison of a variable having boolean value using relational (<, >, <= or >=) operator. [comparisonOfBoolWithBoolError]\n", errout_str());
// op: >=
check("int main(void){\n"
" bool a = true;\n"
" bool b = false;\n"
" if(b >= a){ \n" // here warning should be displayed
" ;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:4:10]: (style) Comparison of a variable having boolean value using relational (<, >, <= or >=) operator. [comparisonOfBoolWithBoolError]\n", errout_str());
// op: <=
check("int main(void){\n"
" bool a = true;\n"
" bool b = false;\n"
" if(b <= a){ \n" // here warning should be displayed
" ;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:4:10]: (style) Comparison of a variable having boolean value using relational (<, >, <= or >=) operator. [comparisonOfBoolWithBoolError]\n", 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);
ASSERT_EQUALS("[test.cpp:5:10]: (style) Comparison of a variable having boolean value using relational (<, >, <= or >=) operator. [comparisonOfBoolWithBoolError]\n", errout_str());
}
void bitwiseOnBoolean() { // 3062
check("void f(_Bool a, _Bool b) {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'? [bitwiseOnBoolean]\n", errout_str());
check("void f(_Bool a, _Bool b) {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\n", errout_str());
check("void f(bool a, bool b) {\n"
" if(a & !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'? [bitwiseOnBoolean]\n", errout_str());
check("void f(bool a, bool b) {\n"
" if(a | !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\n", errout_str());
check("bool a, b;\n"
"void f() {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'? [bitwiseOnBoolean]\n", errout_str());
check("bool a, b;\n"
"void f() {\n"
" if(a & !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'? [bitwiseOnBoolean]\n", errout_str());
check("bool a, b;\n"
"void f() {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\n", errout_str());
check("bool a, b;\n"
"void f() {\n"
" if(a | !b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:3:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\n", errout_str());
check("void f(bool a, int b) {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '&&'? [bitwiseOnBoolean]\n", errout_str());
check("void f(int a, bool b) {\n"
" if(a & b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'b' is used in bitwise operation. Did you mean '&&'? [bitwiseOnBoolean]\n", errout_str());
check("void f(int a, int b) {\n"
" if((a > 0) & (b < 0)) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:16]: (style, inconclusive) Boolean expression 'a>0' is used in bitwise operation. Did you mean '&&'? [bitwiseOnBoolean]\n", errout_str());
check("void f(bool a, int b) {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\n", errout_str());
check("void f(int a, bool b) {\n"
" if(a | b) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:2:10]: (style, inconclusive) Boolean expression 'b' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\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:2:14]: (style, inconclusive) Boolean expression 'a' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\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());
check("int g();\n" // #10655
"void f(bool b) {\n"
" if (g() | b) {}\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3:13]: (style, inconclusive) Boolean expression 'b' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\n", errout_str());
check("int g();\n"
"void f(bool b) {\n"
" if (b | g()) {}\n"
"}\n");
ASSERT_EQUALS("", errout_str());
check("int g();\n"
"bool f(bool b, bool c) {\n"
" return b | g() | c;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3:20]: (style, inconclusive) Boolean expression 'c' is used in bitwise operation. Did you mean '||'? [bitwiseOnBoolean]\n", errout_str());
check("void f(int i) {\n" // #4233
" bool b = true, c = false;\n"
" b &= i;\n"
" c |= i;\n"
" if (b || c) {}\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3:7]: (style, inconclusive) Boolean expression 'b' is used in bitwise operation. [bitwiseOnBoolean]\n"
"[test.cpp:4:7]: (style, inconclusive) Boolean expression 'c' is used in bitwise operation. [bitwiseOnBoolean]\n",
errout_str());
check("void f(int i, int j, bool b) {\n"
" i &= b;\n"
" j |= b;\n"
" if (b || c) {}\n"
"}\n");
ASSERT_EQUALS("", errout_str());
check("bool f(bool b, int i) {\n"
" b &= (i == 5);\n"
" return b;\n"
"}\n");
ASSERT_EQUALS("", errout_str());
check("struct S { bool b{}; };\n" // #12455
"void f(const std::unordered_map<int, S> m) {\n"
" for (const auto& e : m) {\n"
" S s;\n"
" s.b |= e.second.b;\n"
" (void)s.b;\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout_str());
}
void incrementBoolean() {
check("bool bValue = true;\n"
"void f() { bValue++; }");
ASSERT_EQUALS("[test.cpp:2:12]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead. [incrementboolean]\n", errout_str());
check("void f(bool test){\n"
" test++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:5]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead. [incrementboolean]\n", errout_str());
check("void f(bool* test){\n"
" (*test)++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:6]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead. [incrementboolean]\n", errout_str());
check("void f(bool* test){\n"
" test[0]++;\n"
"}");
ASSERT_EQUALS("[test.cpp:2:9]: (style) Incrementing a variable of type 'bool' with postfix operator++ is deprecated by the C++ Standard. You should assign it the value 'true' instead. [incrementboolean]\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"