sqlite3_utils 0.4 · OCaml Package

Values representing types to pass to a statement, or to extract from a row

type 'a arg

type ('a, 'res) t =

| [] : ('res, 'res) t
| :: : 'a arg * ('b, 'res) t -> ('a -> 'b, 'res) t
(*
A representation of a type that returns 'res. 'a is typically a function type with the arguments one would expect, for example (int -> string -> 'res, 'res) t would be used for a query that is parametrized by two values of type int and string respectively.
The definition is public
- since 0.4
*)

val int : int arg

val int64 : int64 arg

val float : float arg

val text : string arg

val blob : string arg

val any_str : string arg

val data : Data.t arg

val nullable : 'a arg -> 'a option arg

Accepts Data.t.NULL and Data.t.NONE or 'a.

raises Invalid_argument
if nested.

since 0.3

val nil : ('res, 'res) t

0 type arguments

val (@>) : 'a arg -> ('b, 'res) t -> ('a -> 'b, 'res) t

Right-associative chaining. int @> float @> nil represents two arguments of type int and float respectively, and is the same as int @> (float @> nil).

val p1 : 'a arg -> ('a -> 'res, 'res) t

Exactly one argument of type 'a

val p2 : 'a arg -> 'b arg -> ('a -> 'b -> 'res, 'res) t

Exactly two arguments of types 'a and 'b respectively.

val p3 : 'a arg -> 'b arg -> 'c arg -> ('a -> 'b -> 'c -> 'res, 'res) t

val p4 : 
  'a arg ->
  'b arg ->
  'c arg ->
  'd arg ->
  ('a -> 'b -> 'c -> 'd -> 'res, 'res) t

val p5 : 
  'a arg ->
  'b arg ->
  'c arg ->
  'd arg ->
  'e arg ->
  ('a -> 'b -> 'c -> 'd -> 'e -> 'res, 'res) t

val p6 : 
  'a arg ->
  'b arg ->
  'c arg ->
  'd arg ->
  'e arg ->
  'f arg ->
  ('a -> 'b -> 'c -> 'd -> 'e -> 'f -> 'res, 'res) t

val (@>>) : ('a, 'b) t -> ('b, 'res) t -> ('a, 'res) t

Right-associative append. This is useful for long lists of types. (p2 int float) @>> (p1 text) is the same as p3 int float text, which is the same as int @> float @> text @> nil.

val id : 'a -> 'a

Empty list of arguments

val mkp2 : 'a -> 'b -> 'a * 'b

Make a tuple. Useful in, for example, Ty.( p2 int text, mkp2).

val mkp3 : 'a -> 'b -> 'c -> 'a * 'b * 'c

val mkp4 : 'a -> 'b -> 'c -> 'd -> 'a * 'b * 'c * 'd

val mkp5 : 'a -> 'b -> 'c -> 'd -> 'e -> 'a * 'b * 'c * 'd * 'e

val mkp6 : 'a -> 'b -> 'c -> 'd -> 'e -> 'f -> 'a * 'b * 'c * 'd * 'e * 'f

package sqlite3_utils