Node:Strange Eval, Next:Close All Ports, Previous:Sloppy Membership, Up:Deprecated
evaleval2 was useful in previous Guile releases because the
eval in those releases was a single argument eval that did
not conform to R5RS. Guile's standard eval now requires a second
environment-specifier argument (which Guile interprets as the module in
which to evaluate the specified code expression). Hence eval is
now R5RS-compliant, and eval2 is obsolete and therefore
deprecated.
| eval2 obj env_thunk | Deprecated Scheme Procedure |
| scm_eval2 (obj, env_thunk) | Deprecated C Function |
Evaluate exp, a Scheme expression, in the environment
designated by lookup, a symbol-lookup function.
Do not use this version of eval, it does not play well
with the module system. Use eval or
primitive-eval instead.
|
In previous Guile releases, the implementation of expressions like
(eval (read port)) was deficient in that source properties
associated with the expression returned by the read would be lost
during the eval. To provide a way of performing a read and
evaluation without losing source properties, read-and-eval! was
invented.
In this Guile release, evaluation always preserves source property
information. So read-and-eval! is now unnecessary.
| read-and-eval! [port] | Deprecated Scheme Procedure |
| scm_read_and_eval_x (port) | Deprecated C Function |
Read a form from port (standard input by default), and evaluate it
(memoizing it in the process) in the top-level environment. If no data
is left to be read from port, an end-of-file error is
signalled.
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