Phase 3.2 xfail half. `#selector("explicit:string")` is the escape
hatch for cases where the sx-side method name doesn't conveniently
produce the target selector under the default mangling rule
(Phase 3.0 — split on `_`, each piece becomes a keyword with a
trailing `:`).
Surface form mirrors `#jni_method_descriptor("(Sig)Ret")` — sits
after the optional `-> ReturnType` and before the method body /
terminator.
Test fixture covers both lowering paths:
- Static method override: `NSObject.gimme()` with override
"description" — exercises lowerObjcStaticCall (Phase 3.1).
- Instance method override: `NSDictionary.lookup(self, key)` with
override "objectForKey:" — declared (parse + AST + lowering
wiring) but not invoked at runtime (no real NSDictionary in
scope). The declaration alone locks in the multi-arg-override path.
Pre-3.2: parser doesn't know `#selector`; snapshot captures
"expected ';'" at the override site, exit=1. Next commit (A2) wires
the lexer token, AST field, parser block, and lowering integration;
snapshot flips to working output.
165/165 example tests. Plan at
`~/.claude/plans/lets-see-options-for-merry-dijkstra.md`.
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