// Copyright 2016-2018, Pulumi Corporation. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package contract import ( "fmt" ) const requireMsg = "A precondition has failed for %v" // Require checks a precondition condition pertaining to a function parameter, and Fails if it is false. // // Deprecated: Use Requiref. func Require(cond bool, param string) { if !cond { failfast(fmt.Sprintf(requireMsg, param)) } } // Requiref checks a precondition condition pertaining to a function parameter, and Failfs if it is false. func Requiref(cond bool, param string, msg string, args ...interface{}) { if !cond { failfast(fmt.Sprintf("%v: %v", fmt.Sprintf(requireMsg, param), fmt.Sprintf(msg, args...))) } }