render: Text
    value: |
      counter: gopls/bug
      title: Gopls bug reports
      description: Stacks of bugs encountered on the gopls server.
      type: partition, histogram, stack # choose only one.
      program: golang.org/x/tools/gopls
      counter: gopls/bug
      depth: 16  # only if type is stack.
      version: v0.13.0  # the first binary version containing this counter.
  validations:
      required: true

import (
	"text/scanner"

	"cmd/internal/src"
)

// A Stack is a stack of TokenReaders. As the top TokenReader hits EOF,
// it resumes reading the next one down.
type Stack struct {
	tr []TokenReader
}

// Push adds tr to the top (end) of the input stack. (Popping happens automatically.)
func (s *Stack) Push(tr TokenReader) {
	s.tr = append(s.tr, tr)
}

func (s *Stack) Next() ScanToken {
	tos := s.tr[len(s.tr)-1]

	ROT                                   // @> Used on ARM for shift type 4, rotate right.
	Include                               // included file started here
	BuildComment                          // //go:build or +build comment
	macroName                             // name of macro that should not be expanded
)