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authorKaz Kylheku <kaz@kylheku.com>2022-01-21 23:04:50 -0800
committerKaz Kylheku <kaz@kylheku.com>2022-01-21 23:04:50 -0800
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typecase: merge with etypecase, handle t differnetly.
* stdlib/type.tl (sys:typecase-expander): New function, formed from body of typecase. Bad clause syntax now handled with compile-error rather than (throwf 'eval-error). The t symbol is handled specially: it turns into a t conditon in the resulting cond rather than a typep test. The compiler will nicely eliminate dead code after that. Now etypecase is handled here also: if we are expanding etypecase, we just emit the extra clause. (typecase, etypecase): Reduced to sys:typecase-expander calls. * tests/012/typecase.tl: New file. * tests/012/compile.tl: Add type.tl to list of compile-tested files.
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