[llvm] 6c8c836 - Add an llvm::cl::opt::operator=(T &&Val) (#147502)

[via llvm-commits]

Author: Tom Natan
Date: 2025-07-08T13:26:15+01:00
New Revision: 6c8c836b4f5a0b519db6f97c4882c6c061edd004

URL: https://github.com/llvm/llvm-project/commit/6c8c836b4f5a0b519db6f97c4882c6c061edd004
DIFF: https://github.com/llvm/llvm-project/commit/6c8c836b4f5a0b519db6f97c4882c6c061edd004.diff

LOG: Add an llvm::cl::opt::operator=(T &&Val) (#147502)

Add an llvm::cl::opt::operator= that takes an rvalue reference of value,
to avoid an unecessary copy for types with memory allocation (string,
vector, etc).

Added: 
    

Modified: 
    llvm/include/llvm/Support/CommandLine.h

Removed: 
    


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diff  --git a/llvm/include/llvm/Support/CommandLine.h b/llvm/include/llvm/Support/CommandLine.h
index 5489b3ff78f51..adaa75cc6c348 100644
--- a/llvm/include/llvm/Support/CommandLine.h
+++ b/llvm/include/llvm/Support/CommandLine.h
@@ -1496,6 +1496,12 @@ class opt
     return this->getValue();
   }
 
+  template <class T> DataType &operator=(T &&Val) {
+    this->getValue() = std::forward<T>(Val);
+    Callback(this->getValue());
+    return this->getValue();
+  }
+
   template <class... Mods>
   explicit opt(const Mods &... Ms)
       : Option(llvm::cl::Optional, NotHidden), Parser(*this) {