Files
el/tests/text/examples/count-lines-words-letters.el
Will Anderson 3a83b6eb80 add text-processing primitives to el runtime
24 new functions covering counting (str_count, str_count_chars,
str_count_bytes, str_count_lines, str_count_words, str_count_letters,
str_count_digits), finding (str_index_of_all, str_last_index_of,
str_find_chars), transforming (str_repeat, str_reverse,
str_strip_prefix/suffix/chars, str_lstrip, str_rstrip), character
classification (is_letter, is_digit, is_alphanumeric, is_whitespace,
is_punctuation, is_uppercase, is_lowercase), and splitting/joining
(str_split_lines, str_split_chars, str_split_n, str_join).

Phase 1 is byte-level + ASCII character classes. Unicode-grapheme
awareness, normalization, and regex are Phase 2 (filed separately).

Lexer-internal helpers is_digit, is_alpha, is_whitespace renamed to
lex_is_digit, lex_is_alpha, lex_is_whitespace to free the public names
for the runtime exports. The El compiler's lexer.el and the bundled
elc-combined.el both updated.

Codegen registrations: builtin_arity entries for all 24 functions,
is_int_call entries for the Int-returning ones (str_count*,
str_last_index_of, str_find_chars) so the + operator dispatches as
arithmetic when applicable.

Tests: tests/text/ corpus with 8 acceptance cases covering the surface
(count-substring, count-overlap-skip, count-lines-words-letters,
index-of-all, transform-suite, char-classes, split-lines, join). All
pass against a fold-fn-main-aware elc bootstrap (see ELC env var
override in run.sh).

Self-host fixed point: elc-combined.el's emit-main pass does not
currently fold the fn main body into C's main, a pre-existing
condition that surfaces as a 39-line gen2/gen3 diff with empty main
in gen3. The committed dist/platform/elc binary has the fold logic
so all tests pass against it. Filing the elc-combined fold-fn-main
fix separately. This commit does not introduce new self-host drift.
2026-05-02 13:37:30 -05:00

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578 B
EmacsLisp

// count-lines-words-letters.el composite count test.
// Input "Hello world\nGoodbye world\n":
// lines: 2 (each \n closes a line)
// words: 4 (Hello, world, Goodbye, world)
// letters: 22 (Hello=5 + world=5 + Goodbye=7 + world=5)
fn run_test() -> String {
let s: String = "Hello world\nGoodbye world\n"
let lines: Int = str_count_lines(s)
let words: Int = str_count_words(s)
let letters: Int = str_count_letters(s)
return int_to_str(lines) + "/" + int_to_str(words) + "/" + int_to_str(letters)
}
fn main() -> Void {
println(run_test())
}