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Library Level

The procedures and syntax described above are too coarse for serious end use. There is no provision to cache modules once loaded; There is no provision to resolve locations of shared module source or objects; The designation of modules (by filename) is file-system dependent.

As conceived above, the library level fills these gaps. The bindings for SLIB would be:

procedure: feature->module feature: Returns a module containing the exports for feature feature. If feature is not known an error is signaled.

procedure: require feature: Imports the modules necessary to provide feature feature. If feature is not known an error is signaled.

syntax: with-feature feature <body>: <body> is evaluated in the current environment augmented by the bindings from modules necessary to provide feature feature. The value of the last expression of <body> is returned. If feature is not known an error is signaled.

There will also be a procedure for augmenting SLIB's module registry.

When SLIB calls load-module, the resulting modules will be cached and simply imported when required again.

For each of SLIB's macro:LOAD procedures there will be a corresponding macro:LOAD-MODULE.

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