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# typed: strict | |
require 'sorbet-runtime' | |
module Result | |
extend T::Sig | |
extend T::Helpers | |
extend T::Generic | |
interface! | |
sealed! | |
OkType = type_member { { upper: Object } } | |
ErrorType = type_member { { upper: Object } } | |
sig { | |
type_parameters(:V) | |
.params(value: T.all(T.type_parameter(:V), Object)) | |
.returns(Result[ | |
T.all(T.type_parameter(:V), Object), | |
T.untyped, | |
]) | |
} | |
def self.ok(value) | |
Success.new(value) | |
end | |
sig { | |
type_parameters(:E) | |
.params(value: T.all(T.type_parameter(:E), Object)) | |
.returns(Result[ | |
T.untyped, | |
T.all(T.type_parameter(:E), Object) | |
]) | |
} | |
def self.err(value) | |
Failure.new(value) | |
end | |
sig { abstract.returns(OkType) } | |
def unwrap; end | |
sig { | |
abstract | |
.type_parameters(:U) | |
.params(block: T.proc.params(arg0: OkType).returns(T.all(T.type_parameter(:U), Object))) | |
.returns(Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType, | |
]) | |
} | |
def map(&block); end | |
sig { | |
abstract | |
.type_parameters(:U) | |
.params(block: | |
T.proc.params(arg0: OkType) | |
.returns( | |
Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType | |
] | |
) | |
) | |
.returns(Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType, | |
]) | |
} | |
def and_then(&block); end | |
sig { | |
abstract | |
.type_parameters(:E) | |
.params(block: T.proc.params(arg0: ErrorType).returns(T.all(T.type_parameter(:E), Object))) | |
.returns(Result[ | |
OkType, | |
T.all(T.type_parameter(:E), Object), | |
]) | |
} | |
def map_err(&block); end | |
class Success | |
extend T::Sig | |
extend T::Generic | |
include Result | |
OkType = type_member { { upper: Object } } | |
ErrorType = type_member { { upper: Object } } | |
sig { params(value: OkType).void } | |
def initialize(value) | |
@value = value | |
end | |
sig { override.returns(OkType) } | |
def unwrap | |
@value | |
end | |
sig { | |
override | |
.type_parameters(:U) | |
.params(block: T.proc.params(arg0: OkType).returns(T.all(T.type_parameter(:U), Object))) | |
.returns(Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType, | |
]) | |
} | |
def map(&block) | |
Result.ok(block.call(@value)) | |
end | |
sig { | |
override | |
.type_parameters(:U) | |
.params(block: | |
T.proc.params(arg0: OkType) | |
.returns( | |
Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType | |
] | |
) | |
) | |
.returns(Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType, | |
]) | |
} | |
def and_then(&block) | |
block.call(@value) | |
end | |
sig { | |
override | |
.type_parameters(:E) | |
.params(block: T.proc.params(arg0: ErrorType).returns(T.all(T.type_parameter(:E), Object))) | |
.returns(Result[ | |
OkType, | |
T.all(T.type_parameter(:E), Object), | |
]) | |
} | |
def map_err(&block) | |
Result.ok(@value) | |
end | |
end | |
class Failure | |
extend T::Sig | |
extend T::Generic | |
include Result | |
OkType = type_member { { upper: Object } } | |
ErrorType = type_member { { upper: Object } } | |
sig { params(value: ErrorType).void } | |
def initialize(value) | |
@value = value | |
end | |
sig { override.returns(T.noreturn) } | |
def unwrap | |
raise UnwrapError.new(@value) | |
end | |
sig { | |
override | |
.type_parameters(:U) | |
.params(block: T.proc.params(arg0: OkType).returns(T.all(T.type_parameter(:U), Object))) | |
.returns(Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType, | |
]) | |
} | |
def map(&block) | |
Result.err(@value) | |
end | |
sig { | |
override | |
.type_parameters(:U) | |
.params(block: | |
T.proc.params(arg0: OkType) | |
.returns( | |
Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType | |
] | |
) | |
) | |
.returns(Result[ | |
T.all(T.type_parameter(:U), Object), | |
ErrorType, | |
]) | |
} | |
def and_then(&block) | |
Result.err(@value) | |
end | |
sig { | |
override | |
.type_parameters(:E) | |
.params(block: T.proc.params(arg0: ErrorType).returns(T.all(T.type_parameter(:E), Object))) | |
.returns(Result[ | |
OkType, | |
T.all(T.type_parameter(:E), Object), | |
]) | |
} | |
def map_err(&block) | |
Result.err(block.call(@value)) | |
end | |
end | |
class UnwrapError < StandardError | |
extend T::Sig | |
sig { params(value: T.untyped).void } | |
def initialize(value) | |
@value = value | |
end | |
sig { returns(String) } | |
def message | |
"called `Result::unwrap` on a Failure containing: '#{@value}'" | |
end | |
end | |
end |
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