diff options
Diffstat (limited to 'src/cmd/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go')
| -rw-r--r-- | src/cmd/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/src/cmd/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go b/src/cmd/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go index 1d8c401939..9fa5aa192c 100644 --- a/src/cmd/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go +++ b/src/cmd/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go @@ -54,11 +54,11 @@ import ( // interior whitespace of the assignment. E is considered interior // whitespace of the BlockStmt containing the assignment. // -// Precondition: [start, end) both lie within the same file as root. -// TODO(adonovan): return (nil, false) in this case and remove precond. -// Requires FileSet; see loader.tokenFileContainsPos. -// -// Postcondition: path is never nil; it always contains at least 'root'. +// The resulting path is never empty; it always contains at least the +// 'root' *ast.File. Ideally PathEnclosingInterval would reject +// intervals that lie wholly or partially outside the range of the +// file, but unfortunately ast.File records only the token.Pos of +// the 'package' keyword, but not of the start of the file itself. func PathEnclosingInterval(root *ast.File, start, end token.Pos) (path []ast.Node, exact bool) { // fmt.Printf("EnclosingInterval %d %d\n", start, end) // debugging @@ -134,6 +134,7 @@ func PathEnclosingInterval(root *ast.File, start, end token.Pos) (path []ast.Nod return false // inexact: overlaps multiple children } + // Ensure [start,end) is nondecreasing. if start > end { start, end = end, start } |