================
@@ -463,6 +463,27 @@ class Triple {
const std::string &str() const { return Data; }
+ /// Return the triple string but only keep the first \p N components.
+ ///
+ /// The returned string will preserve the first \p N components exactly the
+ /// same as the original (including the leading "-" and the value, empty or
+ /// not).
+ ///
+ /// E.g. Triple("arm64-apple-ios").str(5) == "arm64-apple-ios"
+ /// E.g. Triple("arm64-apple-ios--").str(5) == "arm64-apple-ios--"
+ /// E.g. Triple("arm64-apple-ios--").str(4) == "arm64-apple-ios-"
+ /// E.g. Triple("arm64-apple-ios--").str(3) == "arm64-apple-ios"
+ /// E.g. Triple("arm64-apple-ios--").str(2) == "arm64-apple"
+ /// E.g. Triple("arm64-apple-ios--").str(1) == "arm64"
+ /// E.g. Triple("arm64-apple-ios--").str(0) == ""
+ ///
+ /// This method does not normalize any triple strings. Clients that need to
+ /// handle the non-canonical triples that users often specify should use the
+ /// normalize method.
+ ///
+ /// \returns the (shorterned) triple string.
+ StringRef str(size_t N) const;
----------------
royitaqi wrote:
The difference between this new method `str(N)` and `normalize()` is that the
former won't canonicalize the triple string and the latter will.
>From method doc of `normalize()`:
> In particular, it handles the common case in which otherwise valid components
> are in the wrong order.
So I think `str(N)` can be seen as an alternative to `normalize()` where the
triple string isn't canonicalized.
https://github.com/llvm/llvm-project/pull/145157
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