66 lines
2.1 KiB
Go
66 lines
2.1 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package goose contains directives for goose code generation.
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package goose
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// ProviderSet is a marker type that collects a group of providers.
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type ProviderSet struct{}
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// NewSet creates a new provider set that includes the providers in
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// its arguments. Each argument is either an exported function value,
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// an exported struct (zero) value, a provider set, a call to Bind, or
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// a call to Value.
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func NewSet(...interface{}) ProviderSet {
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return ProviderSet{}
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}
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// Build is placed in the body of an injector function to declare the
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// providers to use. Its arguments are the same as NewSet. Its return
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// value is an error message that can be sent to panic.
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//
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// Example:
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//
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// func injector(ctx context.Context) (*sql.DB, error) {
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// panic(goose.Build(otherpkg.FooSet, myProviderFunc))
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// }
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func Build(...interface{}) string {
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return "implementation not generated, run goose"
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}
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// A Binding maps an interface to a concrete type.
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type Binding struct{}
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// Bind declares that a concrete type should be used to satisfy a
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// dependency on iface.
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//
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// Example:
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//
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// var MySet = goose.NewSet(goose.Bind(MyInterface(nil), new(MyStruct)))
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func Bind(iface, to interface{}) Binding {
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return Binding{}
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}
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// A ProvidedValue is an expression that is copied to the generated injector.
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type ProvidedValue struct{}
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// Value binds an expression to provide the type of the expression.
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//
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// Example:
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//
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// var MySet = goose.NewSet(goose.Value([]string(nil)))
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func Value(interface{}) ProvidedValue {
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return ProvidedValue{}
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}
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