Jadpo is experimental and not ready for production. These docs follow the compiler's main branch as of 1 Nov 2026. What's built · Install 0.2.0
jadpo
Reference: Standard library

Standard types

FileName

On this page

A file's name every common file system takes: no / or \, none of Windows' reserved characters or device names, at most 255 bytes: report.pdf.

Software; not ordered; since Jadpo 0.1.0.

Make one

Build one from its text, FileName("report.pdf"), which checks it: text that isn't one breaks format.

text.parse(raw, as: FileName) reads one from its text; text that isn't one at all fails malformed, such as notes/today.txt, notes\today.txt or "a\u0000b".

Text, JSON and storage

text.from writes its canonical text, the one form text.parse reads back. JSON sends its canonical text as a string.

Text JSON
report.pdf "report.pdf"
Résumé 2026.docx "Résumé 2026.docx"
.gitignore ".gitignore"
archive.tar.gz "archive.tar.gz"
CONSOLE.txt "CONSOLE.txt"

It is stored in one column named for the field, of type text. .gitignore is stored as '.gitignore'.

Shown to people

text.format(value, locale:) shows it to people in their locale.

With locale: Locale.en_gb:

Value Shown
report.pdf report.pdf
Résumé 2026.docx Résumé 2026.docx
.gitignore .gitignore
archive.tar.gz archive.tar.gz
CONSOLE.txt CONSOLE.txt

Operations

It has the contract's own operations: text.parse, text.from, text.format, json.read, json.write and ==. It isn't ordered, so < and sorting don't take it. Every standard type meets one contract says how they work.

Markdown for agents: /docs/types/type-file-name.md.Built from Jadpo main at e00e61f.