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39 lines
1.2 KiB
Markdown
39 lines
1.2 KiB
Markdown
# Eval Library
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The `(scheme eval)` library exports procedures for evaluating Scheme data as programs.
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For more information see the [R<sup>7</sup>RS Scheme Specification](../../r7rs.pdf).
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- [`eval`](#eval)
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- [`create-environment`](#create-environment)
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- [`setup-environment`](#setup-environment)
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- [`expand`](#expand)
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# eval
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(eval expr . environment)
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Evaluate `expr` in the specified environment and return the resulting value(s).
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A non-standard extension is provided to supply a default global environment if the `environment` argument is not specified.
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# create-environment
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(create-environment vars values)
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A non-standard function to create a new environment on top of the default one.
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`vars` is a list of identifiers in the new environment, and `values` is a list of each value assigned to each identifier.
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# setup-environment
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(setup-environment)
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A non-standard function to initialize a new global environment.
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# expand
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(expand expr environment rename-environment)
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Perform macro expansion on `expr` and `environment` is the current environment. `rename-environment` is an environment containing variables renamed directly by macros; this would generally be an empty environment when using this function for macro debugging.
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