C libclang：从CXSourceLocation检索游标返回错误的游标？

该程序使用结构存储游标,该结构包含指向转换单元的指针和从调用clang_getCursorLocation(游标)获得的CXSourceLocation.

typedef struct {
    CXTranslationUnit* tu;
    CXSourceLocation srcLoc;
} t_cursorLocation;

为了这个错误,子访问者函数访问每个节点并从每个游标创建一个结构.使用类型为t_cursorLocation的结构,我编写了此函数来检索相应的游标：

CXCursor getCursor(t_cursorLocation *loc1) {
    return clang_getCursor(*loc1->tu,loc1->srcLoc);
}

但是,对于某些游标,当我创建t_cursorLocation结构并使用它来检索从中创建的游标时,检索到的游标不等于它所源自的游标.例如,请参阅子访问者功能：

CXChildVisitResult traverseAST(CXCursor cursor,CXCursor parent,CXClientData client_data) {
    CXTranslationUnit tu = clang_Cursor_getTranslationUnit(cursor);
    CXTranslationUnit tu2 = *((CXTranslationUnit *) client_data);

    t_cursorLocation *loc = new t_cursorLocation();
    loc->tu = &tu;
    loc->srcLoc = clang_getCursorLocation(cursor);

    CXCursor c2 = getCursor(loc);
    printf("CursorKindt%sn",clang_getCString(clang_getCursorKindSpelling(cursor.kind)));
    if (clang_equalCursors(cursor,c2)) {
        printf("Noooo - the cursors do not match! Next test.....");
        // use translation unit passed as client_data to see if
        // there's a difference
        loc->tu = &tu2;
        c2 = getCursor(loc);
        if (clang_equalCursors(cursor,c2)) {
            printf("FAILED ALSO!n");
        } else {
            printf("PASSED???n");
        }
    } else {
        printf("We have a match!n");
    }
    return CXChildVisit_Recurse;
}

我的主要功能如下：

int main(int argc,char **argv) {
    CXIndex index = clang_createIndex(0,0);
    // initialise the translation unit
    CXTranslationUnit tu = clang_parseTranslationUnit(index,argv,argc,CXTranslationUnit_None);

    // set the client data in traverseAST
    CXClientData data = &tu;// NULL;
    // get the root cursor for the translation unit
    CXCursor rootCursor = clang_getTranslationUnitCursor(tu);
    clang_visitChildren(rootCursor,traverseAST,data);

    clang_disposeTranslationUnit(tu);
    clang_disposeIndex(index);

    return 0;
}

我运行的虚拟源代码如下：

void goo() {
    // nothing here
}

void foo() {
    // do something
    int a;
    switch (a) {
        case 0:
            goo();
    };
}

但是输出是一致的,这表明这只发生在某些光标种类上.

这是一个错误还是我缺少或做错了什么？

提前致谢,
雅各