X-Git-Url: https://git.josue.xyz/?a=blobdiff_plain;f=.config%2Fcoc%2Fextensions%2Fcoc-go-data%2Ftools%2Fpkg%2Fmod%2Fgolang.org%2Fx%2Ftools%40v0.0.0-20201105173854-bc9fc8d8c4bc%2Fgo%2Fanalysis%2Fpasses%2Fassign%2Fassign.go;fp=.config%2Fcoc%2Fextensions%2Fcoc-go-data%2Ftools%2Fpkg%2Fmod%2Fgolang.org%2Fx%2Ftools%40v0.0.0-20201105173854-bc9fc8d8c4bc%2Fgo%2Fanalysis%2Fpasses%2Fassign%2Fassign.go;h=3586638efc065de26fa2a9af9dbc48b898e235e9;hb=4d07c77cf4d78cab8639e13ddc3c22495e585b0b;hp=0000000000000000000000000000000000000000;hpb=b3950616b54221c40a7dab9099bda675007e5b6e;p=dotfiles%2F.git

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/assign/assign.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/assign/assign.go
new file mode 100644
index 00000000..3586638e
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/assign/assign.go
@@ -0,0 +1,76 @@
+// Copyright 2013 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 assign defines an Analyzer that detects useless assignments.
+package assign
+
+// TODO(adonovan): check also for assignments to struct fields inside
+// methods that are on T instead of *T.
+
+import (
+	"fmt"
+	"go/ast"
+	"go/token"
+	"reflect"
+
+	"golang.org/x/tools/go/analysis"
+	"golang.org/x/tools/go/analysis/passes/inspect"
+	"golang.org/x/tools/go/analysis/passes/internal/analysisutil"
+	"golang.org/x/tools/go/ast/inspector"
+)
+
+const Doc = `check for useless assignments
+
+This checker reports assignments of the form x = x or a[i] = a[i].
+These are almost always useless, and even when they aren't they are
+usually a mistake.`
+
+var Analyzer = &analysis.Analyzer{
+	Name:     "assign",
+	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.AssignStmt)(nil),
+	}
+	inspect.Preorder(nodeFilter, func(n ast.Node) {
+		stmt := n.(*ast.AssignStmt)
+		if stmt.Tok != token.ASSIGN {
+			return // ignore :=
+		}
+		if len(stmt.Lhs) != len(stmt.Rhs) {
+			// If LHS and RHS have different cardinality, they can't be the same.
+			return
+		}
+		for i, lhs := range stmt.Lhs {
+			rhs := stmt.Rhs[i]
+			if analysisutil.HasSideEffects(pass.TypesInfo, lhs) ||
+				analysisutil.HasSideEffects(pass.TypesInfo, rhs) {
+				continue // expressions may not be equal
+			}
+			if reflect.TypeOf(lhs) != reflect.TypeOf(rhs) {
+				continue // short-circuit the heavy-weight gofmt check
+			}
+			le := analysisutil.Format(pass.Fset, lhs)
+			re := analysisutil.Format(pass.Fset, rhs)
+			if le == re {
+				pass.Report(analysis.Diagnostic{
+					Pos: stmt.Pos(), Message: fmt.Sprintf("self-assignment of %s to %s", re, le),
+					SuggestedFixes: []analysis.SuggestedFix{
+						{Message: "Remove", TextEdits: []analysis.TextEdit{
+							{Pos: stmt.Pos(), End: stmt.End(), NewText: []byte{}},
+						}},
+					},
+				})
+			}
+		}
+	})
+
+	return nil, nil
+}