smalltalk: ifTrue:/ifFalse: family + bar-as-binary parser fix

plans/smalltalk-on-sx.md

@@ -68,7 +68,7 @@ Core mapping:
 - [x] `^expr` from inside a block invokes that captured `^k`. The "return" AST type evaluates the expression then calls `(k v)` on the frame's :return-k. Verified: `detect:in:` style early-exit, multi-level nested blocks, ^ from inside `to:do:`/`whileTrue:`, ^ from a block passed to a *different* method (Caller→Helper) returns from Caller.
 - [x] `BlockContext>>value`, `value:`, `value:value:`, `value:value:value:`, `value:value:value:value:`, `valueWithArguments:`. Implemented in `st-block-dispatch` + `st-block-apply` (eval iteration); pinned by 19 dedicated tests in `lib/smalltalk/tests/blocks.sx` covering arity through 4, valueWithArguments: with empty/non-empty arg arrays, closures over outer locals (read + mutate + later-mutation re-read), nested blocks, blocks as method arguments, `numArgs`, and `class`.
 - [x] `whileTrue:` / `whileTrue` / `whileFalse:` / `whileFalse` as ordinary block sends. `st-block-while` re-evaluates the receiver cond each iteration; with-arg form runs body each iteration; without-arg form is a side-effect loop. Now returns `nil` per ANSI/Pharo. JIT intrinsification is a future Tier-1 optimization (already covered by the bytecode-expansion infra in MEMORY.md). 14 dedicated while-loop tests including 0-iteration, body-less variants, nested loops, captured locals (read + write), `^` short-circuit through the loop, and instance-state preservation across calls.
-- [ ] `ifTrue:` / `ifFalse:` / `ifTrue:ifFalse:` as block sends, similarly intrinsified
+- [x] `ifTrue:` / `ifFalse:` / `ifTrue:ifFalse:` / `ifFalse:ifTrue:` as block sends, plus `and:`/`or:` short-circuit, eager `&`/`|`, `not`. Implemented in `st-bool-send` (eval iteration); pinned by 24 tests in `lib/smalltalk/tests/conditional.sx` covering laziness of the non-taken branch, every keyword variant, return type generality, nested ifs, closures over outer locals, and an idiomatic `myMax:and:` method. Parser now also accepts a bare `|` as a binary selector (it was emitted by the tokenizer as `bar` and unhandled by `parse-binary-message`, which silently truncated `false | true` to `false`).
 - [ ] Escape past returned-from method raises `BlockContext>>cannotReturn:`
 - [ ] Classic programs in `lib/smalltalk/tests/programs/`:
   - [ ] `eight-queens.st`
@@ -108,6 +108,7 @@ Core mapping:
 
 _Newest first. Agent appends on every commit._
 
+- 2026-04-25: `ifTrue:` / `ifFalse:` family pinned (`lib/smalltalk/tests/conditional.sx`, 24 tests) + parser fix: `|` is now accepted as a binary selector in expression position (tokenizer still emits it as `bar` for block param/temp delimiting; `parse-binary-message` accepts both). Caught by `false | true` truncating silently to `false`. 359/359 total.
 - 2026-04-25: `whileTrue:` / `whileFalse:` / no-arg variants pinned (`lib/smalltalk/tests/while.sx`, 14 tests). `st-block-while` returns nil per ANSI; behaviour verified under captured locals, nesting, early `^`, and zero/many iterations. 334/334 total.
 - 2026-04-25: BlockContext value family pinned (`lib/smalltalk/tests/blocks.sx`, 19 tests). Each value/valueN/valueWithArguments: variant verified plus closure semantics (read, write, later-mutation re-read), nested blocks, and block-as-arg. 320/320 total.
 - 2026-04-25: **THE SHOWCASE** — non-local return via captured method-return continuations + 14 NLR tests (`lib/smalltalk/tests/nlr.sx`). `st-invoke` wraps body in `call/cc`; blocks copy creating method's `^k`; `^expr` invokes that k. Verified across nested blocks, `to:do:` / `whileTrue:`, blocks passed to different methods (Caller→Helper escapes back to Caller), inner-vs-outer method nesting. Sentinel-based return removed. 301/301 total.