mirror of https://github.com/status-im/NimYAML.git
55 lines
1.6 KiB
Nim
55 lines
1.6 KiB
Nim
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proc initYamlStream*(backend: iterator(): YamlStreamEvent): YamlStream =
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result.peeked = false
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result.backend = backend
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proc next*(s: var YamlStream): YamlStreamEvent =
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if s.peeked:
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s.peeked = false
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result = s.cached
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else:
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try:
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result = s.backend()
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assert(not finished(s.backend))
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except AssertionError: raise
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except YamlStreamError:
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let cur = getCurrentException()
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var e = newException(YamlStreamError, cur.msg)
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e.parent = cur.parent
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raise e
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except Exception:
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let cur = getCurrentException()
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var e = newException(YamlStreamError, cur.msg)
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e.parent = cur
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raise e
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proc peek*(s: var YamlStream): YamlStreamEvent =
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if not s.peeked:
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s.cached = s.next()
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s.peeked = true
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result = s.cached
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proc `peek=`*(s: var YamlStream, value: YamlStreamEvent) =
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s.cached = value
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s.peeked = true
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proc finished*(s: var YamlStream): bool =
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if s.peeked:
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result = false
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else:
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try:
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s.cached = s.backend()
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if finished(s.backend): result = true
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else:
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s.peeked = true
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result = false
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except AssertionError: raise
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except YamlStreamError:
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let cur = getCurrentException()
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var e = newException(YamlStreamError, cur.msg)
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e.parent = cur.parent
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raise e
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except Exception:
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let cur = getCurrentException()
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var e = newException(YamlStreamError, cur.msg)
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e.parent = cur
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raise e
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