Source Text, Tokens, and Reader

The reader accepts a pinned UTF-8 S-expression grammar and reports deterministic reader-phase diagnostics before normalization.

At a glance

LISPEX

'(alpha 1 2/3 #u8(4 5))

Result

OUTPUT

(alpha 1 2/3 #u8(4 5))

Integer, rational, and real token grammars are disjoint; leading-zero and non-finite numeric spellings are rejected.
Lists, dotted pairs, vectors, bytevectors, strings, characters, quote, quasiquote, and comments have pinned forms.
Reader failures are E1xx diagnostics with source spans; invalid UTF-8 is rejected at the invocation boundary.

Radix and exactness prefixes such as #x and #e are outside the current profile.
The language does not silently normalize newlines, paths, or host encodings.