サンプル

mustermann 4.0.0: Extract route parameters incrementally using peek_params and compose patterns safely using safe_string and the plus operator

検証済みサンプル — gem mustermann 4.0.0: Extract route parameters incrementally using peek_params and compose patterns safely using safe_string and the plus…

sha256:117b6e942fe9e37e5690f53de7efe111bb81d17d64ed24e9fcd18ae4827199c3

MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

宣言された環境 ruby linux x64 ruby ruby bundler

環境	コントラクト	ステージ	実行日
ruby 3 · linux debian/x64 · docker ed25519:d91480838ac982c9	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1	2026-08-17
ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1	2026-08-18

HOW

ゴール: Extract route parameters incrementally using peek_params and compose patterns safely using safe_string and the plus operator
パッケージ: mustermann 4.0.0
シンボル: Mustermann
Mustermann.new
Mustermann::Pattern#peek_params
Mustermann::Pattern#safe_string
Mustermann::Pattern#+
環境: ruby
作成日: 2026-08-17T07:28:24Z

Mustermann patterns anchored to string boundaries return nil on subpaths when using match or params, but peek_params performs unanchored prefix matching and returns both extracted params and the consumed character offset for stepwise sub-routing.
Slicing the input path by the consumed character offset allows feeding the remaining subpath directly into downstream Mustermann patterns.
Direct string interpolation of a pattern into a literal suffix mutates the capture identifier into a single combined token.
Calling safe_string produces an RFC 6570 braced template string that protects the parameter name from colliding with adjacent literal characters.
Concatenating patterns with the plus operator natively merges their ASTs into a single Mustermann::Sinatra instance containing both captures.