Parse.h.doc.start: def of yaml-for-bend@0.1.1.0
Import: import yaml-for-bend@0.1.1.0/parse.bend as Parse
Lines 376-385 of yaml-for-bend@0.1.1.0/parse.bend: https://jend.leeeet.dev/read.txt?path=yaml-for-bend@0.1.1.0/parse.bend&start_line=376&end_line=385

import Base
import yaml-for-bend@0.1.1.0/token.bend as T

# A document starts: bare, when nothing came before or the last one ended
# with "..."; or with directives and "---"; or the stream ends.
def h.doc.start(+ended: Bool, +t: T.Token, +ps: Ps) -> PStep:
  +start = tok.start(t)
  +bare = Bool.not(tok.any(t, [VERSION(), TAG_DIR(), DOC_START(), STREAM_END()]))
  when(PStep, tok.is(t, DOC_END()), u => PGo{take(ps)},
    u => when(PStep, tok.is(t, STREAM_END()), u => PGo{goto(emit(take(ps), StreamEndEv{}, start), SEnd{})},
      u => when(PStep, Bool.and(bare, ended), u => PGo{goto(push(emit(with.tags(ps, defaults()), DocStartEv{False{}}, start), SDocEnd{}), block.node())},
        u => when(PStep, Bool.or(bare, Bool.and(Bool.not(ended), Bool.not(tok.is(t, DOC_START())))), u => fail(ps, "did not find expected <document start>", start),
          u => dirs.done(dirs.go(ps.toks(ps), [], False{}), ps)))))

Uses (30):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.or
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=DOC_END
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=DOC_START
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=Ev
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=PStep
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=Ps
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=STREAM_END
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=St
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=TAG_DIR
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=VERSION
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=block.node
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=defaults
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=dirs.done
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=dirs.go
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=emit
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=fail
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=goto
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=ps.toks
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=push
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=take
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=tok.any
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=tok.is
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=tok.start
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=when
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/parse.bend&name=with.tags
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/token.bend&name=Token