Question

我试图将一个参数的类名提取到objective-C中的方法调用中。我正在解析的代码是：

- (void)testAddConcreteDataModel:(DFDemoDataModelOne*)helpmeh {
    [self.dataModels addObject:helpmeh];
}

我需要的结果是helpmeh类的类型，即“DFDemoDataModelOne”。

到目前为止，我有以下代码，输出："[(DFDataModelContainer).dataModels addObject:helpmeh]"

    if (cursor.kind == CXCursor_ObjCMessageExpr) {
        __block NSString* memberName = nil;
        __block NSString* ownerClassName = nil;
        __block NSString* methodName = [NSString stringWithUTF8String:clang_getCString(clang_getCursorDisplayName(cursor))];

        clang_visitChildrenWithBlock(cursor, ^enum CXChildVisitResult(CXCursor cursor, CXCursor parent) {
            if (cursor.kind == CXCursor_MemberRefExpr) {
                memberName = [NSString stringWithUTF8String:clang_getCString(clang_getCursorDisplayName(cursor))];
                ownerClassName = [NSString stringWithUTF8String:clang_getCString(clang_getCursorDisplayName(clang_getCursorSemanticParent(clang_getCursorReferenced(cursor))))];
            } else {
                if (memberName) {
                    NSString* param = [NSString stringWithUTF8String:clang_getCString(clang_getCursorDisplayName(cursor))];
                    NSLog(@"[(%@).%@ %@%@]", ownerClassName, memberName, methodName, param);
                    clang_visitChildrenWithBlock(cursor, ^enum CXChildVisitResult(CXCursor cursor, CXCursor parent) {

                         // test
                         if ([param isEqualToString:@"helpmeh"] && cursor.kind == CXCursor_DeclRefExpr) {
                            // found the interesting part.. what now?
                         }
                         return CXChildVisit_Recurse;
                     }
                }
            }
            return CXChildVisit_Continue;
        }
    }

关于如何从游标中提取信息，我有点迷失 - 当我转储我的课程时，我可以看到我需要的信息（见最后一行）：

|-ObjCMethodDecl 0x112790f90 <line:32:1, line:34:1> - testAddConcreteDataModel: 'void'
  | |-ImplicitParamDecl 0x112791960 <<invalid sloc>> self 'DFDataModelContainer *const __strong'
  | |-ImplicitParamDecl 0x1127919c0 <<invalid sloc>> _cmd 'SEL':'SEL *'
  | |-ParmVarDecl 0x112791040 <line:32:35, col:55> helpmeh 'DFDemoDataModelOne *__strong'
  | `-CompoundStmt 0x112791bf0 <col:63, line:34:1>
  |   `-ExprWithCleanups 0x112791bd8 <line:33:5, col:39> 'void'
  |     `-ObjCMessageExpr 0x112791ba0 <col:5, col:39> 'void' selector=addObject:
  |       |-PseudoObjectExpr 0x112791b48 <col:6, col:11> 'NSMutableArray *'
  |       | |-ObjCPropertyRefExpr 0x112791ad0 <col:6, col:11> '<pseudo-object type>' lvalue objcproperty Kind=PropertyRef Property="dataModels" Messaging=Getter
  |       | | `-OpaqueValueExpr 0x112791ab0 <col:6> 'DFDataModelContainer *'
  |       | |   `-ImplicitCastExpr 0x112791a40 <col:6> 'DFDataModelContainer *' <LValueToRValue>
  |       | |     `-DeclRefExpr 0x112791a18 <col:6> 'DFDataModelContainer *const __strong' lvalue ImplicitParam 0x112791960 'self' 'DFDataModelContainer *const __strong'
  |       | |-OpaqueValueExpr 0x112791ab0 <col:6> 'DFDataModelContainer *'
  |       | | `-ImplicitCastExpr 0x112791a40 <col:6> 'DFDataModelContainer *' <LValueToRValue>
  |       | |   `-DeclRefExpr 0x112791a18 <col:6> 'DFDataModelContainer *const __strong' lvalue ImplicitParam 0x112791960 'self' 'DFDataModelContainer *const __strong'
  |       | `-ImplicitCastExpr 0x112791b30 <col:11> 'NSMutableArray *' <ARCReclaimReturnedObject>
  |       |   `-ObjCMessageExpr 0x112791b00 <col:11> 'NSMutableArray *' selector=dataModels
  |       |     `-OpaqueValueExpr 0x112791ab0 <col:6> 'DFDataModelContainer *'
  |       |       `-ImplicitCastExpr 0x112791a40 <col:6> 'DFDataModelContainer *' <LValueToRValue>
  |       |         `-DeclRefExpr 0x112791a18 <col:6> 'DFDataModelContainer *const __strong' lvalue ImplicitParam 0x112791960 'self' 'DFDataModelContainer *const __strong'
  |       `-ImplicitCastExpr 0x112791b88 <col:32> 'id':'id' <BitCast>
  |         `-ImplicitCastExpr 0x112791b70 <col:32> 'DFDemoDataModelOne *' <LValueToRValue>
  |           `-DeclRefExpr 0x112791a88 <col:32> 'DFDemoDataModelOne *__strong' lvalue ParmVar 0x112791040 'helpmeh' 'DFDemoDataModelOne *__strong'

任何指针都非常感谢！

Answer 1

您是否尝试过查看clang_getCursorSemanticParent功能？

我无法帮助您使用ObjC代码，但总体思路应该是：

调用clang_getCursorSemanticParent获取类声明的游标
在类声明游标上调用clang_getCursorSpelling或clang_getCursorDisplayName以获取类名

Answer 2

我想我找到了一个解决方案 -

获取光标的定义（在上面的例子中它是CXCursor_ParmDecl，但它可以是任何内容，例如CXCursor_VarDecl等。
获取此光标的第一个孩子

这是我更新的代码 - 它很hacky，需要一些清理/澄清，但是在这里张贴后代。

- (void)processMethodDeclaration:(const CXIdxDeclInfo *)declaration {
    clang_visitChildrenWithBlock(declaration->cursor, ^enum CXChildVisitResult(CXCursor cursor, CXCursor parent) {

        if (cursor.kind == CXCursor_ObjCMessageExpr) {
            __block NSString* memberName = nil;
            __block NSString* referencedObjectName = nil;

            clang_visitChildrenWithBlock(cursor, ^enum CXChildVisitResult(CXCursor cursor, CXCursor parent) {
                if (cursor.kind == CXCursor_MemberRefExpr) {
                    memberName = [NSString stringWithUTF8String:clang_getCString(clang_getCursorDisplayName(cursor))];
                    referencedObjectName = [NSString stringWithUTF8String:clang_getCString(clang_getCursorDisplayName(clang_getCursorSemanticParent(clang_getCursorReferenced(cursor))))];
                } else {
                    if (memberName) {
                        __block NSString* passedClassName = nil;

                        clang_visitChildrenWithBlock(cursor, ^enum CXChildVisitResult(CXCursor cursor, CXCursor parent) {
                            if (cursor.kind == CXCursor_DeclRefExpr) {
                                CXCursor def = clang_getCursorDefinition(cursor);
                                clang_visitChildrenWithBlock(def, ^enum CXChildVisitResult(CXCursor cursor, CXCursor parent) {
                                    passedClassName = [NSString stringWithUTF8String:clang_getCString(clang_getCursorDisplayName(cursor))];
                                    return CXChildVisit_Break;
                                });
                            }

                            return CXChildVisit_Recurse;
                        });

                        return CXChildVisit_Break;
                    }
                }
                return CXChildVisit_Continue;
            });
        }
        return CXChildVisit_Recurse;
    });
}

libclang从游标中获取类名

2 个答案: