variadic if #962
variadic if #962
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Looking sweet. Can't wait for this to be available. Can you add docs for this? |
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Just realized this kind of breaks |
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Hm. Why is this failing? I ran nosetests before committing "variadic lif" without trouble. What was merged between my two commits? #920 "if-no-waste" (0585754) and #950 "f/one-arg-comparators" (b875fec). The complaint is That is not supposed to be possible just from writing a macro. Something's wrong with the compiler. |
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I think I found it. The "if-no-waste" is looking for |
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Are the |
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@tuturto docs added. |
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looking good, 👍 from me. Could squash and rebase before merge, we have been a bit sloppy about that. |
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@kirbyfan64 docs fixed. |
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@hylang/core variadic if looks ready, but need second ack to merge. |
| the evaluation of the condition is ``False``. | ||
| ``if / if* / if-not`` respect Python *truthiness*, that is, a *test* fails if it | ||
| evaluates to a "zero" (including values of ``len`` zero, ``nil``, and | ||
| ``false``), and passes otherwise, but values with a ``__nonzero__`` method can |
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"values with a __bool__ method (or __nonzero__ on Python 2)"?
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Good catch here. I think it would be preferable if Hy were consistent across host implementations, but that seems difficult to fix in this case. I'll mention __bool__ as the default and __nonzero__ as the special case for Python2.
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_+1_ (I left some quibbling comments, but nothing that can't be addressed in a follow-up commit.) |
The `if` form now supports elif clauses. It works like `cond` but without the implicit `do`. The old `if` is now `if*` variadic lif now supports "ellif" clauses. Update if-no-waste compiler to use `if*` properly. (Sometimes one character is all it takes.) document if reword truthiness
The
ifform now supports elif clauses.It works like
condbut without the implicitdo.closes #830.
The old
ifis still available asif*, but you don't need it since the 2- and 3- argument cases work exactly as before.