clang-query is a tool that allows you to quickly iterate and develop the difficult part of a matcher. Once the design of the matcher is completed, it can be transferred to a C++ clang-tidy plugin.
Questions tagged [clang-query]
20 questions
5
votes
1 answer
Clang AST matcher for variables compared to different variable types
I am new to clang-tidy and the following is practice so I can move to more complex matchers and tools.
Lets say we have
typedef int my_type;
void foo()
{
int x = 0;//this should be identified as need to be fixed
my_type z = 0;
…
warz
- 73
- 4
3
votes
0 answers
How do I find string literals containing a given substring with clang-query?
I am doing some automated refactoring and I want to understand if some name is used in strings. E.g. in the code below I want to find all string literals containing substring "hello", which will yield me the first string.
int hello;
const char* str…
Mikhail
- 20,685
- 7
- 70
- 146
3
votes
1 answer
Writing AST matcher to find all case statements having no break statement
I want to find all the case statement having no break statement. I using clang-query to build my matcher. My matcher is failing in some of the test cases.
I wrote simple matcher as
match caseStmt(unless(has(breakStmt())))
it works with follwing…
sunil sarode
- 154
- 1
- 13
2
votes
0 answers
How to see all UnresolvedLookupExpr node in Clang AST
I am looking into various scenarios where UnresolvedLookupExpr node occurs. I notice that the output of -ast-dump and clang-query don't match.
Here is an example code in c++/9/bits/range_access.h.
template
inline constexpr…
Linc Ghibling
- 21
- 1
2
votes
0 answers
clang-tidy isolate multiple field declarations
In clang-tidy there is the readability-isolate-declaration check.
I am trying to do something similar for field declarations.
Let us say that we have the following
typedef struct s{
int x,y;
}s;
If we check the above example in clang-query we…
warz
- 73
- 4
2
votes
1 answer
Running Clang-query on objective-c files that import Foundation
I am trying to use clang-query to run matches against obj-c files that import Foundation but its not working, After building clang-query by moving it to the tools/extra folder, I run it using this command:
./clang-query MyClass.m -- …
Andrespch
- 370
- 3
- 16
1
vote
0 answers
use clang-query to match specified string
how should I use clang-query to match specified string
souece code:
int main()
{
__asm__ __volatile__("pause");
}
I want to substituted "yield" for "pause"
what I have tried
in clang-query, I can only match the stringLiteral and I cant match…
Davi
- 11
- 1
1
vote
1 answer
Running clang-query only on input files
I'm running clang-query on a specific file using a compilation database as follows:
clang-query -p build foo/bar.cpp
This works, but when I run a simple query (e.g. match ifStmt()) it returns thousands of results, including matches from imported…
MattDs17
- 401
- 1
- 4
- 20
1
vote
1 answer
locate constructor line number in cpp source with clang-query
I'm looking to get the line number for the last line of the constructor with clang-query, does anyone know how to get there?
i have a lot of source files to go through, and needing to update the constructors. i spent time trying to parse the source…
huynle
- 53
- 1
- 7
1
vote
2 answers
how to find symbols that should be exported
If you compile with -fvisibility=hidden or with msvc you have to export your shared library symbols manually. As an experiment, how could you find them automatically with AST matchers (clang-query)?
It's not that easy as a minimal set of export…
Trass3r
- 5,858
- 2
- 30
- 45
0
votes
0 answers
using libClang or libTooling to list function declarations
I am developing a windows C++ tool to analyze and mutate C code. I need help to use libClang or preferably libTooling get a list of C function declarations from a source tree of C files (translation units) with their headers. Eventually, I would…
johnco3
- 2,401
- 4
- 35
- 67
0
votes
0 answers
Can I find #define with clang-query?
I know that #defines are processed by the preprocessor and not the compiler that creates the AST. But anyways, the LLVM/clang toolchain could somehow retain that information internally.
Can I query for #define with clang-query? If so, how?
Thomas Weller
- 55,411
- 20
- 125
- 222
0
votes
1 answer
Writing AST Matcher expressions using an AST tree dump as a guide
I am new to clang-query and I need help to understand how to build ASTMatcher expressions for a code profiling tool I am trying to create. Eventually I would like to combine these AST matchers with a libTooling application to rewrite the source…
johnco3
- 2,401
- 4
- 35
- 67
0
votes
1 answer
How do I get clang-query or AST to recognize the underlying pair / type inside a map?
I'd like to create an AST matcher for the following code snippet
#include
int main() {
int a = 3333, b = 4444, c = 5555;
std::unordered_map unorderedMapPtr = {{&a, b}, {&b, c}};
for (auto mapIter : unorderedMapPtr)…
ginginsha
- 142
- 1
- 11
0
votes
0 answers
How can I match a CXXTypeidExpr with clang-query?
Minimum "working" example on compiler explorer: https://godbolt.org/z/r6jebPWMe
I have this C++ code:
#include
namespace {
struct Base {
virtual ~Base() {}
};
struct Derived : Base {
virtual void name() {}
};
} //…
