如何在Clang中获得条件的右括号的位置？

#include "clang/Lex/Lexer.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Frontend/CompilerInstance.h"

using namespace clang;

// 获取条件语句中右括号的位置
SourceLocation getRightParenLocation(const SourceManager& sourceMgr, SourceLocation conditionLoc) {
    Lexer lexer(sourceMgr.getLocForStartOfFile(sourceMgr.getMainFileID()), sourceMgr.getLangOpts(), sourceMgr.getBuffer(sourceMgr.getMainFileID()), sourceMgr, LangOptions(), /*PreprocessorPtr=*/nullptr);

    int leftParenCount = 0;
    Token token;

    while (!lexer.LexFromRawLexer(token)) {
        if (token.is(tok::l_paren)) {
            leftParenCount++;
        } else if (token.is(tok::r_paren)) {
            if (leftParenCount == 0) {
                return sourceMgr.getExpansionLoc(token.getLocation());
            } else {
                leftParenCount--;
            }
        }
    }

    return SourceLocation();
}

int main() {
    CompilerInstance compiler;
    compiler.createDiagnostics();

    // 设置编译器实例的源码管理器和源代码
    compiler.createFileManager();
    compiler.createSourceManager(compiler.getFileManager());
    compiler.getSourceManager().setMainFileID(compiler.getSourceManager().createFileID(llvm::MemoryBuffer::getMemBuffer(""), SourceLocation(), SrcMgr::C_User));

    // 获取条件语句中右括号的位置
    SourceLocation conditionLoc = SourceLocation::getFromRawEncoding(10);  // 假设条件语句的起始位置为第10个字符
    SourceLocation rightParenLoc = getRightParenLocation(compiler.getSourceManager(), conditionLoc);

    if (rightParenLoc.isValid()) {
        llvm::outs() << "Right parenthesis found at line " << compiler.getSourceManager().getSpellingLineNumber(rightParenLoc) << ", column " << compiler.getSourceManager().getSpellingColumnNumber(rightParenLoc) << "\n";
    } else {
        llvm::outs() << "Right parenthesis not found\n";
    }

    return 0;
}