OCLint ASTMatcher规则.匹配NS_ENUM

Question

我正在尝试创建一个匹配typedef enum和typedef NS_ENUM声明的OCLint规则,但收效甚微.我有一个Objective-C文件(TestClass.m),其中包含以下枚举声明:

typedef NS_ENUM(NSInteger, TestEnum) {
    TestEnumNone,
    TestEnumSome,
    TestEnumAll
};

typedef enum {
    othertestvalue = 0,
    othertestvalue1,
    othertestvalue2
} OtherTestEnum;

使用此命令转储AST:

clang -Xclang -ast-dump -fsyntax-only Classes/TestClass.m -- | grep Enum

给我这个输出包含这个:

|-TypedefDecl 0x7f9d3accd630 <col:1, col:28> col:28 TestEnum 'enum TestEnum':'enum TestEnum'
|-EnumDecl 0x7f9d3accd6a8 prev 0x7f9d3accd530 </System/Library/Frameworks/CoreFoundation.framework/Headers/CFAvailability.h:171:57, Classes/TestClass.m:71:1> line:67:28 TestEnum 'NSInteger':'long'
| |-EnumConstantDecl 0x7f9d3accd738 <line:68:5> col:5 TestEnumNone 'NSInteger':'long'
| |-EnumConstantDecl 0x7f9d3accd788 <line:69:5> col:5 TestEnumSome 'NSInteger':'long'
| `-EnumConstantDecl 0x7f9d3accd7d8 <line:70:5> col:5 TestEnumAll 'NSInteger':'long'
|-EnumDecl 0x7f9d3accd828 <line:73:9, line:77:1> line:73:9
| |-EnumConstantDecl 0x7f9d3accd900 <line:74:5, col:22> col:5 othertestvalue 'int'
| |-EnumConstantDecl 0x7f9d3accd950 <line:75:5> col:5 othertestvalue1 'int'
| `-EnumConstantDecl 0x7f9d3accd9a0 <line:76:5> col:5 othertestvalue2 'int'
|-TypedefDecl 0x7f9d3accda40 <line:73:1, line:77:3> col:3 OtherTestEnum 'enum OtherTestEnum':'OtherTestEnum'

我有一个ASTMatcherRule(ObjCNsEnumRule),我试图匹配它们typedef enum以及typedef NS_ENUM以下代码:

#include "oclint/AbstractASTMatcherRule.h"
#include "oclint/RuleSet.h"

using namespace std;
using namespace clang;
using namespace clang::ast_matchers;
using namespace oclint;

class ObjCNsEnumRuleRule : public AbstractASTMatcherRule
{
public:
virtual const string name() const override
{
    return "obj c ns enum rule";
}

virtual int priority() const override
{
    return 3;
}

virtual void callback(const MatchFinder::MatchResult &result) override
{
  const EnumDecl *enumDecl = result.Nodes.getNodeAs<EnumDecl>("enum");
  if (enumDecl) {
    addViolation(enumDecl, this, "Found enum");
  }
}

virtual void setUpMatcher() override
{
  addMatcher(enumDecl().bind("enum"));
}

};

static RuleSet rules(new ObjCNsEnumRuleRule());

但是,当我运行此规则时,我只获得typedef enum声明的输出.

Classes/TestClass.m:73:9: obj c ns enum rule P3 Found enum

我在这做错了什么？两个枚举都显示在AST转储中,但在OCLint规则中只有一个匹配.

编辑

我认为这可能与AST转储有关,显示了在不同源文件中定义EnumDecl的NS_ENUMas(可能是因为NS_ENUM宏),因为我可以匹配typedef,但不能匹配enumdecl.

Answer 1

目前 oclint 中似乎没有办法做到这一点。宏不会暴露于 oclint 规则ASTVisitor或ASTMatcher规则。请参阅此处： https: //github.com/oclint/oclint/issues/148

我最终将其实现为一个简单的SourceCodeReaderRule，如下所示：

#include "oclint/AbstractSourceCodeReaderRule.h"
#include "oclint/RuleSet.h"
#include <iostream>
#include <string>
#include <regex>

using namespace std;
using namespace oclint;

class TypedefEnumStatementRule : public AbstractSourceCodeReaderRule
{
public:
virtual const string name() const override {
    return "typedef enum statement";
}

virtual int priority() const override {
    return 1;
}

virtual void eachLine(int lineNumber, string line) override {
    regex rgx("typedef\\senum");
    smatch match;
    if (regex_search(line, rgx, regex_constants::match_continuous)) {
        string description = "Enums should not be declared with 'typedef enum' use 'typedef NS_ENUM' instead";
        addViolation(lineNumber, 1, lineNumber, 1, this, description);
    }
}
};

static RuleSet rules(new TypedefEnumStatementRule());