On Sat, 24 Oct 2020 at 19:17, David Rector via SG7 <
sg7@lists.isocpp.org> wrote:
# 3
I think only strings should be injectible. Get rid of fragments — they are a source of needless complexity. IIUC, Andrew proposes the ability to inject arbitary code strings via `|# … #|` syntax. E.g. `consteval { |# "private: int i = 42;" #| }` would inject a private `i` into the enclosing class context (and result in a parse error if not in a class).
That doesn't seem to be correct. The paper says that a |# ... #| is an
identifier splice, not an arbitrary string.
I am under the impression that building injected code with just
strings or with just tokens is rather horrible
for implementations? For syntax validation and semantic analysis, most
likely. Token-soup-injection
as a possibility sure made our clang friends balk in Toronto.