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// Copyright 2018 The CUE Authors
// 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
// Package pkg define CUE standard packages.
// Many of the standard packages are modeled after and generated from the Go
// core packages. The types, values, and functions are defined as their Go
// equivalence and mapped to CUE types.
// Beware that some packages are defined in lesser-precision types than are
// typically used in CUE and thus may lead to loss of precision.
// All packages except those defined in the tool subdirectory are hermetic,
// that is depending only on a known set of inputs, and therefore can guarantee
// reproducible results. That is:
// - no reading of files contents
// - no querying of the file system of any kind
// - no communication on the network
// - no information about the type of environment
// - only reproduceable random generators
// Hermetic configurations allow for fast and advanced analysis that otherwise
// would not be possible or practical. The cue "cmd" command can be used to mix
// in non-hermetic influences into configurations by using packages defined
// in the tool subdirectory.
package pkg