Giant blob of minor changes

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.0.0-20201105173854-bc9fc8d8c4bc / go / analysis / passes / sortslice / analyzer.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/sortslice/analyzer.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/sortslice/analyzer.go
new file mode 100644 (file)
index 0000000..69a6793
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/sortslice/analyzer.go
@@ -0,0 +1,123 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package sortslice defines an Analyzer that checks for calls
+// to sort.Slice that do not use a slice type as first argument.
+package sortslice
+
+import (
+       "bytes"
+       "fmt"
+       "go/ast"
+       "go/format"
+       "go/types"
+
+       "golang.org/x/tools/go/analysis"
+       "golang.org/x/tools/go/analysis/passes/inspect"
+       "golang.org/x/tools/go/ast/inspector"
+       "golang.org/x/tools/go/types/typeutil"
+)
+
+const Doc = `check the argument type of sort.Slice
+
+sort.Slice requires an argument of a slice type. Check that
+the interface{} value passed to sort.Slice is actually a slice.`
+
+var Analyzer = &analysis.Analyzer{
+       Name:     "sortslice",
+       Doc:      Doc,
+       Requires: []*analysis.Analyzer{inspect.Analyzer},
+       Run:      run,
+}
+
+func run(pass *analysis.Pass) (interface{}, error) {
+       inspect := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
+
+       nodeFilter := []ast.Node{
+               (*ast.CallExpr)(nil),
+       }
+
+       inspect.Preorder(nodeFilter, func(n ast.Node) {
+               call := n.(*ast.CallExpr)
+               fn, _ := typeutil.Callee(pass.TypesInfo, call).(*types.Func)
+               if fn == nil {
+                       return
+               }
+
+               if fn.FullName() != "sort.Slice" {
+                       return
+               }
+
+               arg := call.Args[0]
+               typ := pass.TypesInfo.Types[arg].Type
+               switch typ.Underlying().(type) {
+               case *types.Slice, *types.Interface:
+                       return
+               }
+
+               var fixes []analysis.SuggestedFix
+               switch v := typ.Underlying().(type) {
+               case *types.Array:
+                       var buf bytes.Buffer
+                       format.Node(&buf, pass.Fset, &ast.SliceExpr{
+                               X:      arg,
+                               Slice3: false,
+                               Lbrack: arg.End() + 1,
+                               Rbrack: arg.End() + 3,
+                       })
+                       fixes = append(fixes, analysis.SuggestedFix{
+                               Message: "Get a slice of the full array",
+                               TextEdits: []analysis.TextEdit{{
+                                       Pos:     arg.Pos(),
+                                       End:     arg.End(),
+                                       NewText: buf.Bytes(),
+                               }},
+                       })
+               case *types.Pointer:
+                       _, ok := v.Elem().Underlying().(*types.Slice)
+                       if !ok {
+                               break
+                       }
+                       var buf bytes.Buffer
+                       format.Node(&buf, pass.Fset, &ast.StarExpr{
+                               X: arg,
+                       })
+                       fixes = append(fixes, analysis.SuggestedFix{
+                               Message: "Dereference the pointer to the slice",
+                               TextEdits: []analysis.TextEdit{{
+                                       Pos:     arg.Pos(),
+                                       End:     arg.End(),
+                                       NewText: buf.Bytes(),
+                               }},
+                       })
+               case *types.Signature:
+                       if v.Params().Len() != 0 || v.Results().Len() != 1 {
+                               break
+                       }
+                       if _, ok := v.Results().At(0).Type().Underlying().(*types.Slice); !ok {
+                               break
+                       }
+                       var buf bytes.Buffer
+                       format.Node(&buf, pass.Fset, &ast.CallExpr{
+                               Fun: arg,
+                       })
+                       fixes = append(fixes, analysis.SuggestedFix{
+                               Message: "Call the function",
+                               TextEdits: []analysis.TextEdit{{
+                                       Pos:     arg.Pos(),
+                                       End:     arg.End(),
+                                       NewText: buf.Bytes(),
+                               }},
+                       })
+               }
+
+               pass.Report(analysis.Diagnostic{
+                       Pos:            call.Pos(),
+                       End:            call.End(),
+                       Message:        fmt.Sprintf("sort.Slice's argument must be a slice; is called with %s", typ.String()),
+                       SuggestedFixes: fixes,
+               })
+       })
+       return nil, nil
+}