# cp.rx.go.Require

A Statement that will require that the resolvable value matches a predicate, and if not, it will send an error.

# Submodules

Constants - Useful values which cannot be changed

Functions - API calls offered directly by the extension

Methods - API calls which can only be made on an object returned by a constructor


Signature	`cp.rx.go.Require.OrThrow <cp.rx.go.Statement.Modifier>`
Type	Constant
Description	A `Statement.Modifier` that sets the message to throw if the requirement is not met.
Notes	None
Source	src/extensions/cp/rx/go/Require.lua line 59


Signature	`cp.rx.go.Require(requirement) -> Require`
Type	Function
Description	Creates a new `Require` `Statement` with the specified `requirement`.
Parameters	requirement - a `resolvable` value that will be checked.
Returns	The `Statement` instance which will check if the `requirement` matches the requirement.
Notes	By default, it will require that all items in the requirement are not `nil` and completed. This is most useful with `Given`, allowing retrieval and checking of values before continuing. Example: lua</li><li>Given(</li><li> Require(someObservable):Is(2):OrThrow("Must be 2")</li><li>):Then(function(someValue)</li><li> -- do stuff with `someValue`</li><li>):Now()</li><li>
Examples	None
Source	src/extensions/cp/rx/go/Require.lua line 16


Signature	`cp.rx.go.Require:Are(value) -> Require.Are`
Type	Method
Description	Specifies the value to check.
Parameters	value - The value that all results from the `requirement` must match.
Returns	The `Are` `Statement.Modifier`.
Notes	None
Examples	None
Source	src/extensions/cp/rx/go/Require.lua line 105


Signature	`cp.rx.go.Require:AreNot(value) -> Require.AreNot`
Type	Method
Description	Specifies the value to check.
Parameters	value - The value that all results from the `requirement` must match.
Returns	The `AreNot` `Statement.Modifier`.
Notes	None
Examples	None
Source	src/extensions/cp/rx/go/Require.lua line 170


Signature	`cp.rx.go.Require:Is(value) -> Require.Is`
Type	Method
Description	Specifies the value to check.
Parameters	value - The value that all results from the `requirement` must match.
Returns	The `Is` `Statement.Modifier`.
Notes	None
Examples	None
Source	src/extensions/cp/rx/go/Require.lua line 87


Signature	`cp.rx.go.Require:IsNot(value) -> Require.IsNot`
Type	Method
Description	Specifies the value to check.
Parameters	value - The value that all results from the `requirement` must not match.
Returns	The `IsNot` `Statement.Modifier`.
Notes	None
Examples	None
Source	src/extensions/cp/rx/go/Require.lua line 152


Signature	`cp.rx.go.Require:Matches(predicate) -> Require.Matches`
Type	Method
Description	Specifies the predicate to check.
Parameters	value - The value that all results from the `requirement` must not match.
Returns	The `Matches` `Statement.Modifier`.
Notes	Example: `lua</li><li>Require(someObservable):Matches(function(value) return value % 2 == 0 end)</li><li>`
Examples	None
Source	src/extensions/cp/rx/go/Require.lua line 217


Signature	`cp.rx.go.Require:OrThrow(message) -> Require.OrThrow`
Type	Method
Description	Specifies the message to throw if the requirement is not met.
Parameters	message - The string to throw when there is an error.
Returns	The `OrThrow` `Statement.Modifier`.
Notes	None
Examples	None
Source	src/extensions/cp/rx/go/Require.lua line 63