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d6df0a53b5
Co-authored-by: Norwin Roosen <git@nroo.de> Co-authored-by: Norwin <git@nroo.de> Reviewed-on: https://gitea.com/gitea/tea/pulls/390 Reviewed-by: 6543 <6543@obermui.de> Reviewed-by: Andrew Thornton <art27@cantab.net> Co-authored-by: Norwin <noerw@noreply.gitea.io> Co-committed-by: Norwin <noerw@noreply.gitea.io>
91 lines
2.7 KiB
Go
91 lines
2.7 KiB
Go
// Copyright 2021 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:build !typeparams || !go1.17
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// +build !typeparams !go1.17
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package typeparams
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import (
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"go/ast"
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"go/types"
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)
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// NOTE: doc comments must be kept in sync with typeparams.go.
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// Enabled reports whether type parameters are enabled in the current build
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// environment.
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const Enabled = false
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// UnpackIndex extracts all index expressions from e. For non-generic code this
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// is always one expression: e.Index, but may be more than one expression for
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// generic type instantiation.
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func UnpackIndex(e *ast.IndexExpr) []ast.Expr {
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return []ast.Expr{e.Index}
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}
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// IsListExpr reports whether n is an *ast.ListExpr, which is a new node type
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// introduced to hold type arguments for generic type instantiation.
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func IsListExpr(n ast.Node) bool {
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return false
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}
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// ForTypeDecl extracts the (possibly nil) type parameter node list from n.
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func ForTypeDecl(*ast.TypeSpec) *ast.FieldList {
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return nil
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}
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// ForFuncDecl extracts the (possibly nil) type parameter node list from n.
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func ForFuncDecl(*ast.FuncDecl) *ast.FieldList {
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return nil
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}
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// ForSignature extracts the (possibly empty) type parameter object list from
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// sig.
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func ForSignature(*types.Signature) []*types.TypeName {
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return nil
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}
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// HasTypeSet reports if iface has a type set.
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func HasTypeSet(*types.Interface) bool {
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return false
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}
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// IsComparable reports if iface is the comparable interface.
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func IsComparable(*types.Interface) bool {
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return false
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}
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// IsConstraint reports whether iface may only be used as a type parameter
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// constraint (i.e. has a type set or is the comparable interface).
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func IsConstraint(*types.Interface) bool {
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return false
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}
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// ForNamed extracts the (possibly empty) type parameter object list from
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// named.
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func ForNamed(*types.Named) []*types.TypeName {
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return nil
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}
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// NamedTArgs extracts the (possibly empty) type argument list from named.
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func NamedTArgs(*types.Named) []types.Type {
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return nil
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}
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// InitInferred initializes info to record inferred type information.
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func InitInferred(*types.Info) {
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}
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// GetInferred extracts inferred type information from info for e.
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//
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// The expression e may have an inferred type if it is an *ast.IndexExpr
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// representing partial instantiation of a generic function type for which type
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// arguments have been inferred using constraint type inference, or if it is an
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// *ast.CallExpr for which type type arguments have be inferred using both
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// constraint type inference and function argument inference.
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func GetInferred(*types.Info, ast.Expr) ([]types.Type, *types.Signature) {
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return nil, nil
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}
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