.gitignore added

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.1.0 / go / analysis / passes / internal / analysisutil / util.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/go/analysis/passes/internal/analysisutil/util.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/go/analysis/passes/internal/analysisutil/util.go
new file mode 100644 (file)
index 0000000..ac37e47
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/go/analysis/passes/internal/analysisutil/util.go
@@ -0,0 +1,120 @@
+// Copyright 2018 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 analysisutil defines various helper functions
+// used by two or more packages beneath go/analysis.
+package analysisutil
+
+import (
+       "bytes"
+       "go/ast"
+       "go/printer"
+       "go/token"
+       "go/types"
+       "io/ioutil"
+)
+
+// Format returns a string representation of the expression.
+func Format(fset *token.FileSet, x ast.Expr) string {
+       var b bytes.Buffer
+       printer.Fprint(&b, fset, x)
+       return b.String()
+}
+
+// HasSideEffects reports whether evaluation of e has side effects.
+func HasSideEffects(info *types.Info, e ast.Expr) bool {
+       safe := true
+       ast.Inspect(e, func(node ast.Node) bool {
+               switch n := node.(type) {
+               case *ast.CallExpr:
+                       typVal := info.Types[n.Fun]
+                       switch {
+                       case typVal.IsType():
+                               // Type conversion, which is safe.
+                       case typVal.IsBuiltin():
+                               // Builtin func, conservatively assumed to not
+                               // be safe for now.
+                               safe = false
+                               return false
+                       default:
+                               // A non-builtin func or method call.
+                               // Conservatively assume that all of them have
+                               // side effects for now.
+                               safe = false
+                               return false
+                       }
+               case *ast.UnaryExpr:
+                       if n.Op == token.ARROW {
+                               safe = false
+                               return false
+                       }
+               }
+               return true
+       })
+       return !safe
+}
+
+// Unparen returns e with any enclosing parentheses stripped.
+func Unparen(e ast.Expr) ast.Expr {
+       for {
+               p, ok := e.(*ast.ParenExpr)
+               if !ok {
+                       return e
+               }
+               e = p.X
+       }
+}
+
+// ReadFile reads a file and adds it to the FileSet
+// so that we can report errors against it using lineStart.
+func ReadFile(fset *token.FileSet, filename string) ([]byte, *token.File, error) {
+       content, err := ioutil.ReadFile(filename)
+       if err != nil {
+               return nil, nil, err
+       }
+       tf := fset.AddFile(filename, -1, len(content))
+       tf.SetLinesForContent(content)
+       return content, tf, nil
+}
+
+// LineStart returns the position of the start of the specified line
+// within file f, or NoPos if there is no line of that number.
+func LineStart(f *token.File, line int) token.Pos {
+       // Use binary search to find the start offset of this line.
+       //
+       // TODO(adonovan): eventually replace this function with the
+       // simpler and more efficient (*go/token.File).LineStart, added
+       // in go1.12.
+
+       min := 0        // inclusive
+       max := f.Size() // exclusive
+       for {
+               offset := (min + max) / 2
+               pos := f.Pos(offset)
+               posn := f.Position(pos)
+               if posn.Line == line {
+                       return pos - (token.Pos(posn.Column) - 1)
+               }
+
+               if min+1 >= max {
+                       return token.NoPos
+               }
+
+               if posn.Line < line {
+                       min = offset
+               } else {
+                       max = offset
+               }
+       }
+}
+
+// Imports returns true if path is imported by pkg.
+func Imports(pkg *types.Package, path string) bool {
+       for _, imp := range pkg.Imports() {
+               if imp.Path() == path {
+                       return true
+               }
+       }
+       return false
+}