Error: conversion from StringRef to string

Beginners
1

In LLVM10, this code is ok

std::string StringName = ErrorTypeVarDecl->getName();

but update to LLVM15,my code show some error as follow

error: conversion from ‘llvm::StringRef’ to non-scalar type ‘std::__cxx11::string {aka std::__cxx11::basic_string<char>}’ requested
         std::string StringName = ErrorTypeVarDecl->getName();

I am confused, please help me.

after change the code as follow, error disappear

std::string StringName = ErrorTypeVarDecl->getName().str();
2

llvm 11 included this change [ADT] Make StringRef's std::string conversion operator explicit · llvm/llvm-project@777180a · GitHub, which is still present in 15. This made the conversion to std::string explicit.

So you must now ask for it,. as shown in [ADT] Make StringRef's std::string conversion operator explicit · llvm/llvm-project@777180a · GitHub where they updated all the uses in llvm.

In your case:

std::string StringName = std::string(ErrorTypeVarDecl->getName());

Or stick with .str(), same result.

3

get it .thanks for your reply.