value group-repeat/c : contract?

procedure (rx/group? expr) → boolean?   expr : string?

procedure (rx/group expr ...+ [#:repeat repeat]) → string?   expr : string?   repeat : group-repeat/c = 'one

> (rx/group "cat")

"(cat)"

> (rx/group "cat" #:repeat 'optional)

"(cat)?"

procedure (rx/and-group expr ...+ [#:repeat repeat]) → string?

expr : string?

repeat : group-repeat/c = 'one

> (rx/and-group "cat" "dog")

"(catdog)"

> (rx/and-group "cat" "dog" #:repeat 'optional)

"(catdog)?"

procedure (rx/or-group expr ...+ [#:repeat repeat]) → string?

expr : string?

repeat : group-repeat/c = 'one

> (rx/or-group "cat" "dog")

"(cat|dog)"

> (rx/or-group "cat" "dog" #:repeat 'optional)

"(cat|dog)?"

procedure (rx/special-group? expr) → boolean?

expr : string?

> (rx/special-group? (rx/group "cat"))

#f

> (rx/special-group? (rx/non-capture-group "cat"))

#t

procedure (rx/non-capture-group? expr) → boolean?   expr : string?

procedure (rx/non-capture-group   expr             ...+            [ #:repeat repeat])   →   string?   expr : string?   repeat : group-repeat/c = 'one

procedure (rx/nc-group expr ...+ [#:repeat repeat]) → string?   expr : string?   repeat : group-repeat/c = 'one

> (rx/non-capture-group "cat")

"(?:cat)"

> (rx/non-capture-group "cat" #:repeat 'optional)

"(?:cat)?"

> (rx/non-capture-group? (rx/non-capture-group "cat"))

#t

procedure (rx/named-group? expr) → boolean?   expr : string?

procedure (rx/named-group   expr             ...+             #:name name            [ #:repeat repeat])   →   string?   expr : string?   name : string?   repeat : group-repeat/c = 'one

> (rx/named-group (rx/or "cat" "dog") #:name "animal")

"(?cat|dog)"

> (rx/named-group (rx/or "cat" "dog") #:name "animal" #:repeat 'optional)

"(?cat|dog)?"

> (rx/named-group? (rx/named-group (rx/or "cat" "dog") #:name "animal"))

#f

> (rx/special-group? (rx/named-group (rx/or "cat" "dog") #:name "animal"))

#t

value mode/c : contract?

procedure (rx/with-mode expr ...+ #:mode modes) → string?

expr : string?

modes : (or/c mode/c (listof mode/c))

> (rx/with-mode (rx/or "cat" "dog") #:mode 'case-insensitive)

"(?i:cat|dog)"