Remove *_until-style iteration methods.
#495
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This style/convention is a legacy from an old version of the Savi language, in which yield blocks could not be "jumped out of". Now that `return`, `error!`, and `break` can all jump out of a yield block, the pattern (of allowing the caller to yield back a `Bool` to indicate whether iteration should continue) is obsolete, and should be removed to reduce complexity and maintenance burden.
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This style/convention is a legacy from an old version of the Savi language, in which yield blocks could not be "jumped out of".
Now that
return,error!, andbreakcan all jump out of a yield block, the pattern (of allowing the caller to yield back aBoolto indicate whether iteration should continue) is obsolete, and should be removed to reduce complexity and maintenance burden.