98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
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// 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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//go:generate go run generate.go
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// Package stdlib provides a table of all exported symbols in the
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// standard library, along with the version at which they first
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// appeared.
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package stdlib
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import (
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"fmt"
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"strings"
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)
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type Symbol struct {
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Name string
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Kind Kind
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Version Version // Go version that first included the symbol
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}
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// A Kind indicates the kind of a symbol:
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// function, variable, constant, type, and so on.
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type Kind int8
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const (
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Invalid Kind = iota // Example name:
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Type // "Buffer"
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Func // "Println"
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Var // "EOF"
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Const // "Pi"
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Field // "Point.X"
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Method // "(*Buffer).Grow"
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)
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func (kind Kind) String() string {
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return [...]string{
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Invalid: "invalid",
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Type: "type",
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Func: "func",
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Var: "var",
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Const: "const",
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Field: "field",
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Method: "method",
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}[kind]
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}
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// A Version represents a version of Go of the form "go1.%d".
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type Version int8
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// String returns a version string of the form "go1.23", without allocating.
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func (v Version) String() string { return versions[v] }
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var versions [30]string // (increase constant as needed)
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func init() {
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for i := range versions {
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versions[i] = fmt.Sprintf("go1.%d", i)
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}
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}
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// HasPackage reports whether the specified package path is part of
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// the standard library's public API.
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func HasPackage(path string) bool {
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_, ok := PackageSymbols[path]
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return ok
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}
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// SplitField splits the field symbol name into type and field
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// components. It must be called only on Field symbols.
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//
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// Example: "File.Package" -> ("File", "Package")
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func (sym *Symbol) SplitField() (typename, name string) {
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if sym.Kind != Field {
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panic("not a field")
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}
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typename, name, _ = strings.Cut(sym.Name, ".")
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return
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}
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// SplitMethod splits the method symbol name into pointer, receiver,
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// and method components. It must be called only on Method symbols.
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//
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// Example: "(*Buffer).Grow" -> (true, "Buffer", "Grow")
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func (sym *Symbol) SplitMethod() (ptr bool, recv, name string) {
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if sym.Kind != Method {
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panic("not a method")
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}
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recv, name, _ = strings.Cut(sym.Name, ".")
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recv = recv[len("(") : len(recv)-len(")")]
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ptr = recv[0] == '*'
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if ptr {
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recv = recv[len("*"):]
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}
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return
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}
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