diff options
Diffstat (limited to 'vendor/golang.org/x/tools/go/loader/util.go')
-rw-r--r-- | vendor/golang.org/x/tools/go/loader/util.go | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/vendor/golang.org/x/tools/go/loader/util.go b/vendor/golang.org/x/tools/go/loader/util.go deleted file mode 100644 index 7f38dd74..00000000 --- a/vendor/golang.org/x/tools/go/loader/util.go +++ /dev/null @@ -1,124 +0,0 @@ -// 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 loader - -import ( - "go/ast" - "go/build" - "go/parser" - "go/token" - "io" - "os" - "strconv" - "sync" - - "golang.org/x/tools/go/buildutil" -) - -// We use a counting semaphore to limit -// the number of parallel I/O calls per process. -var ioLimit = make(chan bool, 10) - -// parseFiles parses the Go source files within directory dir and -// returns the ASTs of the ones that could be at least partially parsed, -// along with a list of I/O and parse errors encountered. -// -// I/O is done via ctxt, which may specify a virtual file system. -// displayPath is used to transform the filenames attached to the ASTs. -// -func parseFiles(fset *token.FileSet, ctxt *build.Context, displayPath func(string) string, dir string, files []string, mode parser.Mode) ([]*ast.File, []error) { - if displayPath == nil { - displayPath = func(path string) string { return path } - } - var wg sync.WaitGroup - n := len(files) - parsed := make([]*ast.File, n) - errors := make([]error, n) - for i, file := range files { - if !buildutil.IsAbsPath(ctxt, file) { - file = buildutil.JoinPath(ctxt, dir, file) - } - wg.Add(1) - go func(i int, file string) { - ioLimit <- true // wait - defer func() { - wg.Done() - <-ioLimit // signal - }() - var rd io.ReadCloser - var err error - if ctxt.OpenFile != nil { - rd, err = ctxt.OpenFile(file) - } else { - rd, err = os.Open(file) - } - if err != nil { - errors[i] = err // open failed - return - } - - // ParseFile may return both an AST and an error. - parsed[i], errors[i] = parser.ParseFile(fset, displayPath(file), rd, mode) - rd.Close() - }(i, file) - } - wg.Wait() - - // Eliminate nils, preserving order. - var o int - for _, f := range parsed { - if f != nil { - parsed[o] = f - o++ - } - } - parsed = parsed[:o] - - o = 0 - for _, err := range errors { - if err != nil { - errors[o] = err - o++ - } - } - errors = errors[:o] - - return parsed, errors -} - -// scanImports returns the set of all import paths from all -// import specs in the specified files. -func scanImports(files []*ast.File) map[string]bool { - imports := make(map[string]bool) - for _, f := range files { - for _, decl := range f.Decls { - if decl, ok := decl.(*ast.GenDecl); ok && decl.Tok == token.IMPORT { - for _, spec := range decl.Specs { - spec := spec.(*ast.ImportSpec) - - // NB: do not assume the program is well-formed! - path, err := strconv.Unquote(spec.Path.Value) - if err != nil { - continue // quietly ignore the error - } - if path == "C" { - continue // skip pseudopackage - } - imports[path] = true - } - } - } - } - return imports -} - -// ---------- Internal helpers ---------- - -// TODO(adonovan): make this a method: func (*token.File) Contains(token.Pos) -func tokenFileContainsPos(f *token.File, pos token.Pos) bool { - p := int(pos) - base := f.Base() - return base <= p && p < base+f.Size() -} |