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For example, the array bound of "Chars" in the following example is For example, the array bound of "Chars" in the following example is
value-dependent. value-dependent.
template<int Size> int f() { return Size; } template<int Size> int f() { return Size; }
expr(isValueDependent()) matches return Size expr(isValueDependent()) matches return Size
</pre></td></tr> </pre></td></tr>
<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1Expr.html">Expr</a>&gt;</td><td class="name" onclick="toggle('nullPointerConstant0')"><a name="nullPointerConstant0Anchor">nullPointerConstant</a></td><td></td></tr>
<tr><td colspan="4" class="doc" id="nullPointerConstant0"><pre>Matches expressions that resolve to a null pointer constant, such as
GNU's __null, C++11's nullptr, or C's NULL macro.
Given:
void *v1 = NULL;
void *v2 = nullptr;
void *v3 = __null; // GNU extension
char *cp = (char *)0;
int *ip = 0;
int i = 0;
expr(nullPointerConstant())
matches the initializer for v1, v2, v3, cp, and ip. Does not match the
initializer for i.
</pre></td></tr>
<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1FieldDecl.html">FieldDecl</a>&gt;</td><td class="name" onclick="toggle('hasBitWidth0')"><a name="hasBitWidth0Anchor">hasBitWidth</a></td><td>unsigned Width</td></tr> <tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1FieldDecl.html">FieldDecl</a>&gt;</td><td class="name" onclick="toggle('hasBitWidth0')"><a name="hasBitWidth0Anchor">hasBitWidth</a></td><td>unsigned Width</td></tr>
<tr><td colspan="4" class="doc" id="hasBitWidth0"><pre>Matches non-static data members that are bit-fields of the specified <tr><td colspan="4" class="doc" id="hasBitWidth0"><pre>Matches non-static data members that are bit-fields of the specified
bit width. bit width.
Given Given
class C { class C {
int a : 2; int a : 2;
int b : 4; int b : 4;
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declStmt(isInTemplateInstantiation()) declStmt(isInTemplateInstantiation())
matches 'int i;' and 'unsigned i'. matches 'int i;' and 'unsigned i'.
unless(stmt(isInTemplateInstantiation())) unless(stmt(isInTemplateInstantiation()))
will NOT match j += 42; as it's shared between the template definition and will NOT match j += 42; as it's shared between the template definition and
instantiation. instantiation.
</pre></td></tr> </pre></td></tr>
<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('nullPointerConstant0')"><a name="nullPointerConstant0Anchor">nullPointerConstant</a></td><td></td></tr>
<tr><td colspan="4" class="doc" id="nullPointerConstant0"><pre>Matches expressions that resolve to a null pointer constant, such as
GNU's __null, C++11's nullptr, or C's NULL macro.
Given:
void *v1 = NULL;
void *v2 = nullptr;
void *v3 = __null; // GNU extension
char *cp = (char *)0;
int *ip = 0;
int i = 0;
nullPointerConstant()
matches the initializer for v1, v2, v3, cp, and ip. Does not match the
initializer for i.
</pre></td></tr>
<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1StringLiteral.html">StringLiteral</a>&gt;</td><td class="name" onclick="toggle('hasSize1')"><a name="hasSize1Anchor">hasSize</a></td><td>unsigned N</td></tr> <tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1StringLiteral.html">StringLiteral</a>&gt;</td><td class="name" onclick="toggle('hasSize1')"><a name="hasSize1Anchor">hasSize</a></td><td>unsigned N</td></tr>
<tr><td colspan="4" class="doc" id="hasSize1"><pre>Matches nodes that have the specified size. <tr><td colspan="4" class="doc" id="hasSize1"><pre>Matches nodes that have the specified size.
Given Given
int a[42]; int a[42];
int b[2 * 21]; int b[2 * 21];
int c[41], d[43]; int c[41], d[43];
char *s = "abcd"; char *s = "abcd";
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