read-string

(read-string s) / (read-string opts s)

Reads the first datum of the string and answers it as data: what a quote of the same text answers, so (= (read-string "[1 :k]") '[1 :k]) holds. Numbers, strings, characters, keywords (::kw in the calling namespace), symbols, lists, vectors, maps and sets read like the source reader reads them; reader metadata drops and #_ discards. A record literal (#ns.Name{...} / #ns.Name[...]) builds the record of a class the program defines, over its unevaluated body. Text after the first datum is ignored. Empty input signals EOF while reading, unless the options map has an :eof entry, which is then the answer. #= read-time evaluation, reader conditionals and tagged literals are refused like in source, and @x reads (deref x) like '@x does (the oracle: (clojure.core/deref x)). Runs on every backend; as a value, one or two arguments.

[1 :k s (a b)]
true
:none