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6.1 Errors ¶

macro: assert expr ¶

If expr yields #f, display an appropriate error message and throw an assertion-failed exception.

Procedure: caught-error key args ¶

Tell the Shepherd that a key error with args has occurred. This is the simplest way to cause caught error result in uniformly formatted warning messages. The current implementation is not very good, though.

macro: without-system-error expr… ¶

Evaluates the exprs, not going further if a system error occurs, but also doing nothing about it.