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33 lines
1.5 KiB
Go
33 lines
1.5 KiB
Go
// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package pkgbits implements low-level coding abstractions for
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// Unified IR's export data format.
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//
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// At a low-level, a package is a collection of bitstream elements.
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// Each element has a "kind" and a dense, non-negative index.
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// Elements can be randomly accessed given their kind and index.
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//
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// Individual elements are sequences of variable-length values (e.g.,
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// integers, booleans, strings, go/constant values, cross-references
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// to other elements). Package pkgbits provides APIs for encoding and
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// decoding these low-level values, but the details of mapping
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// higher-level Go constructs into elements is left to higher-level
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// abstractions.
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//
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// Elements may cross-reference each other with "relocations." For
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// example, an element representing a pointer type has a relocation
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// referring to the element type.
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//
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// Go constructs may be composed as a constellation of multiple
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// elements. For example, a declared function may have one element to
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// describe the object (e.g., its name, type, position), and a
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// separate element to describe its function body. This allows readers
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// some flexibility in efficiently seeking or re-reading data (e.g.,
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// inlining requires re-reading the function body for each inlined
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// call, without needing to re-read the object-level details).
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//
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// This is a copy of internal/pkgbits in the Go implementation.
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package pkgbits
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