61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
// Copyright 2022 PingCAP, Inc.
|
|
//
|
|
// 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
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package prealloc
|
|
|
|
import (
|
|
"go/ast"
|
|
|
|
"github.com/golangci/prealloc"
|
|
"github.com/pingcap/tidb/build/linter/util"
|
|
"golang.org/x/tools/go/analysis"
|
|
)
|
|
|
|
// Settings is the settings for preallocation.
|
|
type Settings struct {
|
|
Simple bool
|
|
RangeLoops bool `mapstructure:"range-loops"`
|
|
ForLoops bool `mapstructure:"range-loops"`
|
|
}
|
|
|
|
// Name is the name of the analyzer.
|
|
const Name = "prealloc"
|
|
|
|
// Analyzer is the analyzer struct of prealloc.
|
|
var Analyzer = &analysis.Analyzer{
|
|
Name: Name,
|
|
Doc: "Finds slice declarations that could potentially be preallocated",
|
|
Run: run,
|
|
}
|
|
|
|
func run(pass *analysis.Pass) (interface{}, error) {
|
|
s := &Settings{
|
|
Simple: true,
|
|
RangeLoops: true,
|
|
ForLoops: false,
|
|
}
|
|
for _, f := range pass.Files {
|
|
hints := prealloc.Check([]*ast.File{f}, s.Simple, s.RangeLoops, s.ForLoops)
|
|
for _, hint := range hints {
|
|
pass.Reportf(hint.Pos, "[%s] Consider preallocating %s", Name, util.FormatCode(hint.DeclaredSliceName))
|
|
}
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func init() {
|
|
util.SkipAnalyzer(Analyzer)
|
|
}
|