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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2026 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
"
astutils.h
"
#
include
"
fixture.h
"
#
include
"
helpers.h
"
#
include
"
settings.h
"
#
include
"
symboldatabase.h
"
#
include
"
token.h
"
#
include
"
tokenlist.h
"
#
include
<
cstdint
>
#
include
<
cstring
>
class
TestAstUtils
:
public
TestFixture
{
public:
TestAstUtils
() : TestFixture(
"
TestAstUtils
"
) {}
private:
//
TODO: test with C code
void
run
()
override
{
TEST_CASE
(findLambdaEndTokenTest);
TEST_CASE
(findLambdaStartTokenTest);
TEST_CASE
(isNullOperandTest);
TEST_CASE
(isReturnScopeTest);
TEST_CASE
(isSameExpressionCpp);
TEST_CASE
(isSameExpressionC);
TEST_CASE
(isVariableChangedTest);
TEST_CASE
(isVariableChangedByFunctionCallTest);
TEST_CASE
(isExpressionChangedTest);
TEST_CASE
(nextAfterAstRightmostLeafTest);
TEST_CASE
(isUsedAsBool);
}
#
define
findLambdaEndToken
(...) findLambdaEndToken_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
findLambdaEndToken_
(
const
char
* file,
int
line,
const
char
(&code)[size],
const
char pattern[] = nullptr, bool checkNext = true) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token*
const
tokStart = pattern ?
Token::findsimplematch
(tokenizer.
tokens
(), pattern,
strlen
(pattern)) : tokenizer.
tokens
();
const
Token *
const
tokEnd = (::findLambdaEndToken)(tokStart);
return
tokEnd && (!checkNext || tokEnd->
next
() ==
nullptr
);
}
void
findLambdaEndTokenTest
() {
const
Token* nullTok =
nullptr
;
ASSERT
(
nullptr
== (::findLambdaEndToken)(nullTok));
ASSERT_EQUALS
(
false
,
findLambdaEndToken
(
"
void f() { }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[]{ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[]{ return 0; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](){ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[&](){ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[&, i](){ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](int a, int b) { return a + b; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](int a, int b) mutable { return a + b; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](int a, int b) constexpr { return a + b; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) -> int { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) mutable -> int { return -1; }
"
));
ASSERT_EQUALS
(
false
,
findLambdaEndToken
(
"
[](void) foo -> int { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) constexpr -> int { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) constexpr -> int* { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) constexpr -> const * int { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) mutable -> const * int { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) constexpr -> const ** int { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
[](void) constexpr -> const * const* int { return x; }
"
));
ASSERT_EQUALS
(
false
,
findLambdaEndToken
(
"
int** a[] { new int*[2] { new int, new int} };
"
,
"
[ ]
"
));
ASSERT_EQUALS
(
false
,
findLambdaEndToken
(
"
int** a[] { new int*[2] { new int, new int} };
"
,
"
[ 2
"
));
ASSERT_EQUALS
(
false
,
findLambdaEndToken
(
"
shared_ptr<Type *[]> sp{ new Type *[2] {new Type, new Type}, Deleter<Type>{ 2 } };
"
,
"
[ 2
"
));
ASSERT_EQUALS
(
true
,
findLambdaEndToken
(
"
int i = 5 * []{ return 7; }();
"
,
"
[
"
,
/*
checkNext
*/
false
));
}
#
define
findLambdaStartToken
(...) findLambdaStartToken_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
findLambdaStartToken_
(
const
char
* file,
int
line,
const
char
(&code)[size]) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token *
const
tokStart = (::findLambdaStartToken)(tokenizer.
list
.
back
());
return
tokStart && tokStart == tokenizer.
list
.
front
();
}
void
findLambdaStartTokenTest
() {
ASSERT
(
nullptr
== (::findLambdaStartToken)(
nullptr
));
ASSERT_EQUALS
(
false
,
findLambdaStartToken
(
"
void f() { }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[]{ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[]{ return 0; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](){ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[&](){ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[&, i](){ }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](int a, int b) { return a + b; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](int a, int b) mutable { return a + b; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](int a, int b) constexpr { return a + b; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) -> int { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) mutable -> int { return -1; }
"
));
ASSERT_EQUALS
(
false
,
findLambdaStartToken
(
"
[](void) foo -> int { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) constexpr -> int { return -1; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) constexpr -> int* { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) constexpr -> const * int { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) mutable -> const * int { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) constexpr -> const ** int { return x; }
"
));
ASSERT_EQUALS
(
true
,
findLambdaStartToken
(
"
[](void) constexpr -> const * const* int { return x; }
"
));
}
#
define
isNullOperand
(...) isNullOperand_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
isNullOperand_
(
const
char
* file,
int
line,
const
char
(&code)[size]) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
return
(::isNullOperand)(tokenizer.
tokens
());
}
void
isNullOperandTest
() {
ASSERT_EQUALS
(
true
,
isNullOperand
(
"
(void*)0;
"
));
ASSERT_EQUALS
(
true
,
isNullOperand
(
"
(void*)0U;
"
));
ASSERT_EQUALS
(
true
,
isNullOperand
(
"
(void*)0x0LL;
"
));
ASSERT_EQUALS
(
true
,
isNullOperand
(
"
NULL;
"
));
ASSERT_EQUALS
(
true
,
isNullOperand
(
"
nullptr;
"
));
ASSERT_EQUALS
(
true
,
isNullOperand
(
"
(void*)NULL;
"
));
ASSERT_EQUALS
(
true
,
isNullOperand
(
"
static_cast<int*>(0);
"
));
ASSERT_EQUALS
(
false
,
isNullOperand
(
"
0;
"
));
ASSERT_EQUALS
(
false
,
isNullOperand
(
"
(void*)0.0;
"
));
ASSERT_EQUALS
(
false
,
isNullOperand
(
"
(void*)1;
"
));
}
#
define
isReturnScope
(...) isReturnScope_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
isReturnScope_
(
const
char
* file,
int
line,
const
char
(&code)[size], int offset) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token *
const
tok = (offset <
0
)
? tokenizer.
list
.
back
()->
tokAt
(
1
+offset)
: tokenizer.
tokens
()->
tokAt
(offset);
return
(isReturnScope)(tok, settingsDefault.
library
);
}
void
isReturnScopeTest
() {
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
void f() { if (a) { return; } }
"
, -
2
));
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
int f() { if (a) { return {}; } }
"
, -
2
));
//
#8891
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
std::string f() { if (a) { return std::string{}; } }
"
, -
2
));
//
#8891
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
std::string f() { if (a) { return std::string{
\"\"
}; } }
"
, -
2
));
//
#8891
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
void f() { if (a) { return (ab){0}; } }
"
, -
2
));
//
#7103
ASSERT_EQUALS
(
false
,
isReturnScope
(
"
void f() { if (a) { return (ab){0}; } }
"
, -
4
));
//
#7103
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
void f() { if (a) { {throw new string(x);}; } }
"
, -
4
));
//
#7144
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
void f() { if (a) { {throw new string(x);}; } }
"
, -
2
));
//
#7144
ASSERT_EQUALS
(
false
,
isReturnScope
(
"
void f() { [=]() { return data; }; }
"
, -
1
));
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
auto f() { return [=]() { return data; }; }
"
, -
1
));
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
auto f() { return [=]() { return data; }(); }
"
, -
1
));
ASSERT_EQUALS
(
false
,
isReturnScope
(
"
auto f() { [=]() { return data; }(); }
"
, -
1
));
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
void negativeTokenOffset() { return; }
"
, -
1
));
ASSERT_EQUALS
(
false
,
isReturnScope
(
"
void zeroTokenOffset() { return; }
"
,
0
));
ASSERT_EQUALS
(
true
,
isReturnScope
(
"
void positiveTokenOffset() { return; }
"
,
7
));
}
#
define
isSameExpression
(...) isSameExpression_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
isSameExpression_
(
const
char
* file,
int
line,
const
char
(&code)[size],
const
char tokStr1[],
const
char tokStr2[], bool cpp) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
, cpp);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token *
const
tok1 =
Token::findsimplematch
(tokenizer.
tokens
(), tokStr1,
strlen
(tokStr1));
const
Token *
const
tok2 =
Token::findsimplematch
(tok1->
next
(), tokStr2,
strlen
(tokStr2));
return
(isSameExpression)(
false
, tok1, tok2, settingsDefault,
false
,
true
);
}
void
isSameExpressionTestInternal
(
bool
cpp) {
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
x = 1 + 1;
"
,
"
1
"
,
"
1
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
x = 1 + 1u;
"
,
"
1
"
,
"
1u
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
x = 1.0 + 1.0;
"
,
"
1.0
"
,
"
1.0
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
x = 1.0f + 1.0;
"
,
"
1.0f
"
,
"
1.0
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
x = 1L + 1;
"
,
"
1L
"
,
"
1
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
x = 0.0f + 0x0p+0f;
"
,
"
0.0f
"
,
"
0x0p+0f
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
x < x;
"
,
"
x
"
,
"
x
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
x < y;
"
,
"
x
"
,
"
y
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
(x + 1) < (x + 1);
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
(x + 1) < (x + 1L);
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(!cpp,
isSameExpression
(
"
(1 + x) < (x + 1);
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
(1.0l + x) < (1.0 + x);
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(!cpp,
isSameExpression
(
"
(0.0 + x) < (x + 0x0p+0);
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
void f() {double y = 1e1; (x + y) < (x + 10.0); }
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(!cpp,
isSameExpression
(
"
void f() {double y = 1e1; (x + 10.0) < (y + x); }
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
void f() {double y = 1e1; double z = 10.0; (x + y) < (x + z); }
"
,
"
+
"
,
"
+
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
A + A
"
,
"
A
"
,
"
A
"
, cpp));
//
the remaining test cases are not valid C code
if
(!cpp)
return
;
//
https://trac.cppcheck.net/ticket/9700
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
A::B + A::B;
"
,
"
::
"
,
"
::
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
A::B + A::C;
"
,
"
::
"
,
"
::
"
, cpp));
ASSERT_EQUALS
(
true
,
isSameExpression
(
"
A::B* get() { if(x) return new A::B(true); else return new A::B(true); }
"
,
"
new
"
,
"
new
"
, cpp));
ASSERT_EQUALS
(
false
,
isSameExpression
(
"
A::B* get() { if(x) return new A::B(true); else return new A::C(true); }
"
,
"
new
"
,
"
new
"
, cpp));
}
void
isSameExpressionCpp
() {
isSameExpressionTestInternal
(
true
);
}
void
isSameExpressionC
() {
isSameExpressionTestInternal
(
false
);
}
#
define
isVariableChanged
(...) isVariableChanged_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
isVariableChanged_
(
const
char
* file,
int
line,
const
char
(&code)[size],
const
char startPattern[],
const
char endPattern[]) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token *
const
tok1 =
Token::findsimplematch
(tokenizer.
tokens
(), startPattern,
strlen
(startPattern));
const
Token *
const
tok2 =
Token::findsimplematch
(tokenizer.
tokens
(), endPattern,
strlen
(endPattern));
return
(isVariableChanged)(tok1, tok2,
1
,
false
, settingsDefault);
}
void
isVariableChangedTest
() {
//
#8211 - no lhs for >> , do not crash
(
void
)
isVariableChanged
(
"
void f() {
\n
"
"
int b;
\n
"
"
if (b) { (int)((INTOF(8))result >> b); }
\n
"
"
}
"
,
"
if
"
,
"
}
"
);
//
#9235
ASSERT_EQUALS
(
false
,
isVariableChanged
(
"
void f() {
\n
"
"
int &a = a;
\n
"
"
}
\n
"
,
"
= a
"
,
"
}
"
));
ASSERT_EQUALS
(
false
,
isVariableChanged
(
"
void f(const A& a) { a.f(); }
"
,
"
{
"
,
"
}
"
));
ASSERT_EQUALS
(
true
,
isVariableChanged
(
"
void g(int*);
\n
"
"
void f(int x) { g(&x); }
\n
"
,
"
{
"
,
"
}
"
));
ASSERT_EQUALS
(
false
,
isVariableChanged
(
"
const int A[] = { 1, 2, 3 };
"
,
"
[
"
,
"
]
"
));
}
#
define
isVariableChangedByFunctionCall
(...) isVariableChangedByFunctionCall_( __FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
isVariableChangedByFunctionCall_
(
const
char
* file,
int
line,
const
char
(&code)[size],
const
char pattern[], bool *inconclusive) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token *
const
argtok =
Token::findmatch
(tokenizer.
tokens
(), pattern);
ASSERT_LOC
(argtok, file, line);
int
indirect = (argtok->
variable
() && argtok->
variable
()->
isArray
());
return
(isVariableChangedByFunctionCall)(argtok, indirect, settingsDefault.
library
, inconclusive);
}
void
isVariableChangedByFunctionCallTest
() {
{
//
#8271 - template method
const
char
code[] =
"
void f(int x) {
\n
"
"
a<int>(x);
\n
"
"
}
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
x ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
true
, inconclusive);
}
{
const
char
code[] =
"
int f(int x) {
\n
"
"
return int(x);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
x ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(int* p);
\n
"
"
void f(int x) {
\n
"
"
return g(&x);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
true
,
isVariableChangedByFunctionCall
(code,
"
x ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(const int* p);
\n
"
"
void f(int x) {
\n
"
"
return g(&x);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
x ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(int** pp);
\n
"
"
void f(int* p) {
\n
"
"
return g(&p);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
true
,
isVariableChangedByFunctionCall
(code,
"
p ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(int* const* pp);
\n
"
"
void f(int* p) {
\n
"
"
return g(&p);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
p ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(int a[2]);
\n
"
"
void f() {
\n
"
"
int b[2] = {};
\n
"
"
return g(b);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
true
,
isVariableChangedByFunctionCall
(code,
"
b ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(const int a[2]);
\n
"
"
void f() {
\n
"
"
int b[2] = {};
\n
"
"
return g(b);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
TODO_ASSERT_EQUALS
(
false
,
true
,
isVariableChangedByFunctionCall
(code,
"
b ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(std::array<int, 2> a);
\n
"
"
void f() {
\n
"
"
std::array<int, 2> b = {};
\n
"
"
return g(b);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
b ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(std::array<int, 2>& a);
\n
"
"
void f() {
\n
"
"
std::array<int, 2> b = {};
\n
"
"
return g(b);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
true
,
isVariableChangedByFunctionCall
(code,
"
b ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(const std::array<int, 2>& a);
\n
"
"
void f() {
\n
"
"
std::array<int, 2> b = {};
\n
"
"
return g(b);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
b ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
void g(std::array<int, 2>* p);
\n
"
"
void f() {
\n
"
"
std::array<int, 2> b = {};
\n
"
"
return g(&b);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
true
,
isVariableChangedByFunctionCall
(code,
"
b ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
struct S {};
\n
"
"
void g(S);
\n
"
"
void f(S* s) {
\n
"
"
g(*s);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
s ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
{
const
char
code[] =
"
struct S {};
\n
"
"
void g(const S&);
\n
"
"
void f(S* s) {
\n
"
"
g(*s);
\n
"
"
}
\n
"
;
bool
inconclusive =
false
;
ASSERT_EQUALS
(
false
,
isVariableChangedByFunctionCall
(code,
"
s ) ;
"
, &inconclusive));
ASSERT_EQUALS
(
false
, inconclusive);
}
}
#
define
isExpressionChanged
(...) isExpressionChanged_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
isExpressionChanged_
(
const
char
* file,
int
line,
const
char
(&code)[size],
const
char var[],
const
char startPattern[],
const
char endPattern[])
{
const
Settings settings =
settingsBuilder
().
library
(
"
std.cfg
"
).
build
();
SimpleTokenizer
tokenizer
(settings, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token*
const
start =
Token::findsimplematch
(tokenizer.
tokens
(), startPattern,
strlen
(startPattern));
const
Token*
const
end =
Token::findsimplematch
(start, endPattern,
strlen
(endPattern));
const
Token*
const
expr =
Token::findsimplematch
(tokenizer.
tokens
(), var,
strlen
(var));
return
(findExpressionChanged)(expr, start, end, settings);
}
void
isExpressionChangedTest
()
{
ASSERT_EQUALS
(
true
,
isExpressionChanged
(
"
void f(std::map<int, int>& m) { m[0]; }
"
,
"
m [
"
,
"
{
"
,
"
}
"
));
ASSERT_EQUALS
(
false
,
isExpressionChanged
(
"
void f(const A& a) { a.f(); }
"
,
"
a .
"
,
"
{
"
,
"
}
"
));
ASSERT_EQUALS
(
true
,
isExpressionChanged
(
"
void g(int*);
\n
"
"
void f(int x) { g(&x); }
\n
"
,
"
x
"
,
"
) {
"
,
"
}
"
));
ASSERT_EQUALS
(
true
,
isExpressionChanged
(
"
struct S { void f(); int i; };
\n
"
"
void call_f(S& s) { (s.*(&S::f))(); }
\n
"
,
"
s .
"
,
"
{ (
"
,
"
}
"
));
}
#
define
nextAfterAstRightmostLeaf
(...) nextAfterAstRightmostLeaf_(__FILE__, __LINE__, __VA_ARGS__)
template
<
size_t
size>
bool
nextAfterAstRightmostLeaf_
(
const
char
* file,
int
line,
const
char
(&code)[size],
const
char parentPattern[],
const
char rightPattern[]) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
const
Token * tok =
Token::findsimplematch
(tokenizer.
tokens
(), parentPattern,
strlen
(parentPattern));
return
Token::simpleMatch
((::nextAfterAstRightmostLeaf)(tok), rightPattern,
strlen
(rightPattern));
}
void
nextAfterAstRightmostLeafTest
() {
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
void f(int a, int b) { int x = a + b; }
"
,
"
=
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = g(a); }
"
,
"
=
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = g(a)[b]; }
"
,
"
=
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = g(g(a)[b]); }
"
,
"
=
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = g(g(a)[b] + a); }
"
,
"
=
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = g(a)[b + 1]; }
"
,
"
=
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
void f() { int a; int b; int x = [](int a){}; }
"
,
"
=
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = a + b; }
"
,
"
+
"
,
"
; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = g(a)[b + 1]; }
"
,
"
+
"
,
"
] ; }
"
));
ASSERT_EQUALS
(
true
,
nextAfterAstRightmostLeaf
(
"
int * g(int); void f(int a, int b) { int x = g(a + 1)[b]; }
"
,
"
+
"
,
"
) [
"
));
}
enum
class
Result
: std::
uint8_t
{False, True, Fail};
template
<
size_t
size>
Result
isUsedAsBool
(
const
char
(&code)[size],
const
char pattern[]) {
SimpleTokenizer
tokenizer
(settingsDefault, *
this
);
if
(!tokenizer.
tokenize
(code))
return
Result::Fail;
const
Token *
const
argtok =
Token::findmatch
(tokenizer.
tokens
(), pattern);
if
(!argtok)
return
Result::Fail;
return
::
isUsedAsBool
(argtok, settingsDefault) ? Result::True : Result::False;
}
void
isUsedAsBool
() {
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { bool b = true; }
"
,
"
b
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i = true; }
"
,
"
i
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (i) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; while (i) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; for (;i;) {} }
"
,
"
i ; )
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; for (;;i) {} }
"
,
"
i )
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; for (i;;) {} }
"
,
"
i ; ; )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; for (int j=0; i; ++j) {} }
"
,
"
i ; ++
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; if (i == 2) {} }
"
,
"
i ==
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; if (i == true) {} }
"
,
"
i ==
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i,j; if (i == (j&&f())) {} }
"
,
"
i ==
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (!i == 0) {} }
"
,
"
i ==
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (!i) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (!!i) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (i && f()) {} }
"
,
"
i &&
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; int j = i && f(); }
"
,
"
i &&
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; if (i & f()) {} }
"
,
"
i &
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (static_cast<bool>(i)) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if ((bool)i) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (1+static_cast<bool>(i)) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (1+(bool)i) {} }
"
,
"
i )
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; if (1+static_cast<int>(i)) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; if (1+!static_cast<int>(i)) {} }
"
,
"
i )
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; if (1+(int)i) {} }
"
,
"
i )
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int i; if (i + 2) {} }
"
,
"
i +
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int i; bool b = i; }
"
,
"
i ; }
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f(bool b); void f() { int i; f(i); }
"
,
"
i )
"
));
ASSERT
(Result::False ==
isUsedAsBool
(
"
void f() { int *i; if (*i) {} }
"
,
"
i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
void f() { int *i; if (*i) {} }
"
,
"
* i )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
int g(); void h(bool); void f() { h(g()); }
"
,
"
( ) )
"
));
ASSERT
(Result::True ==
isUsedAsBool
(
"
int g(int); void h(bool); void f() { h(g(0)); }
"
,
"
( 0 ) )
"
));
}
};
REGISTER_TEST
(TestAstUtils)
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