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Environment
===========
Environment (not to be mixed with context) represent current state of
interpreter instance. It contains reference to memory, input stream and
output stream. To enable
`tail call optimization <https://en.wikipedia.org/wiki/Tail_call>`_,
environment is also used as storage for next expression evaluation.
Main method responsible for environment evaluation is `lsp_env_resolve`.
This function implements evaluation loop (also known as trampoline), which
iteratively evaluates sequence of expressions. Evaluation of single expression
can result in direct data value (which is registered with
`lsp_env_set_result_value` function) or can be delegated to execution
of another expression (which is registered with `lsp_env_set_result_eval`
function). Evaluation loop (trampoline) repeats expression evaluation
until resulting data value is fully resolved.
Source code
-----------
env.h
'''''
.. literalinclude:: ../src_c/env.h
:language: c
env.c
'''''
.. literalinclude:: ../src_c/env.c
:language: c
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