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ba41f8a580
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Adds the most-used control-flow forms:
if COND { ... } [else { ... } | else if ...]
for { ... } — infinite
for COND { ... } — while-like
for INIT; COND; POST { ... } — C-style
break / continue — keyword stmts (no labels yet)
x++ / x-- — Go statement inc-dec
AST shapes:
(list :if COND THEN ELSE) — ELSE nil / :if / :block
(list :for INIT COND POST BODY) — any of INIT/COND/POST may be nil
(list :break LABEL) (list :continue LABEL)
(list :inc-dec OP EXPR) — OP is "++" / "--"
**Closes the parser-mode caveat** logged when composite literals
landed. `gp-no-comp-lit` is a re-entrant counter on the parser state;
control-flow constructs increment it before parsing their condition
and decrement after, suppressing the postfix `{` → composite-lit
interpretation so that `if Foo { ... }` correctly reads `{ ... }` as
the body, not as `Foo{}` composite literal. Verified by the test:
(go-parse "if Foo {}") → (:if (:var "Foo") (:block ()) nil)
gp-parse-control-cond is the single helper that bracket-wraps the
flag bump so future control-flow forms (switch, select, range) can't
forget to engage suppression.
switch / select / defer / go / for-range / channel-send still deferred.
parse 152/152, total 281/281.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>