go-ethereum/libevm/set/set.go
Arran Schlosberg 02110d3f34
chore: logging (#151)
## Why this should be merged

Adds logging of `libevm` modification of default behaviour.

## How this works

1. Introduces `log.Lazy` functions to allow expensive logging operations
to be computed i.f.f. required by the logging level.
2. Adds `Info` logging for registration of types and `Debug` logging for
all else.
3. Only paths that change behaviour in a potentially unpredictable
manner are logged; of note, RLP / JSON encoding is _not_ considered
unpredictable given that registered extras are logged.
4. The minimal viable package, `set`, was necessary because we don't
want to depend on `avalanchego` and the `hashicorp/go-set` latest
version requires a later version of Go. #153 tracks a swap to the latter
when possible.

The `eth/tracers/internal/tracetest` test flaked at least twice
(unrelated to these changes) so I've marked it as such since it's not
worth a separate PR.

## How this was tested

New unit test on `log.Lazy` + `set` methods. Existing CI for the rest as
it's a refactor.
2025-02-24 16:53:21 +00:00

59 lines
1.7 KiB
Go

// Copyright 2025 the libevm authors.
//
// The libevm additions to go-ethereum are free software: you can redistribute
// them and/or modify them under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The libevm additions are distributed in the hope that they will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see
// <http://www.gnu.org/licenses/>.
// Package set provides a generic implementation of a set.
package set
// A Set is a generic set implementation.
type Set[T comparable] map[T]struct{}
// From returns a Set containing the elements.
func From[T comparable](elements ...T) Set[T] {
s := make(Set[T], len(elements))
for _, e := range elements {
s[e] = struct{}{}
}
return s
}
// Sub returns the elements in `s` that aren't in `t`.
func (s Set[T]) Sub(t Set[T]) Set[T] {
return s.alsoIn(t, false)
}
// Intersect returns the intersection of `s` and `t`.
func (s Set[T]) Intersect(t Set[T]) Set[T] {
return s.alsoIn(t, true)
}
func (s Set[T]) alsoIn(t Set[T], inBoth bool) Set[T] {
res := make(Set[T])
for el := range s {
if _, ok := t[el]; ok == inBoth {
res[el] = struct{}{}
}
}
return res
}
// Slice returns the elements of `s` as a slice.
func (s Set[T]) Slice() []T {
sl := make([]T, 0, len(s))
for el := range s {
sl = append(sl, el)
}
return sl
}