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ea81a8087b
- types: low-level mapping to the implementation language. - core: functions on types that are exposed directly to mal. - printer: implementation called by pr-str, str, prn, println. - env: the environment implementation - Also, unindent all TCO while loops so that the diff of step4 and step5 are minimized.
51 lines
1.8 KiB
Makefile
51 lines
1.8 KiB
Makefile
#
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# mal (Make Lisp) Object Types and Functions
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#
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ifndef __mal_env_included
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__mal_env_included := true
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_TOP_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
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include $(_TOP_DIR)types.mk
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#
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# ENV
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#
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# An ENV environment is a hash-map with an __outer__ reference to an
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# outer environment
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define BIND_ARGS
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$(strip \
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$(word 1,$(1) \
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$(foreach fparam,$(call _nth,$(2),0),\
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$(if $(call _EQ,&,$($(fparam)_value)),
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$(call ENV_SET,$(1),$($(call _nth,$(2),1)_value),$(strip \
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$(foreach new_list,$(call _list),
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$(word 1,$(new_list) \
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$(foreach val,$(3),$(call _conj!,$(new_list),$(val))))))),\
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$(foreach val,$(word 1,$(3)),\
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$(call ENV_SET,$(1),$($(fparam)_value),$(val))\
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$(foreach left,$(call srest,$(2)),\
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$(if $(call _EQ,0,$(call _count,$(left))),\
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,\
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$(call BIND_ARGS,$(1),$(left),$(wordlist 2,$(words $(3)),$(3))))))))))
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endef
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# Create a new ENV and optional bind values in it
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# $(1): outer environment (set as a key named __outer__)
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# $(2): list/vector object of bind forms
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# $(3): space separated list of expressions to bind
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ENV = $(strip $(foreach new_env,$(call _assoc!,$(call _hash_map),__outer__,$(if $(1),$(1),$(__nil))),$(if $(2),$(call BIND_ARGS,$(new_env),$(2),$(3)),$(new_env))))
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ENV_FIND = $(strip \
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$(if $(call _contains?,$(1),$(subst =,$(__equal),$(2))),\
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$(1),\
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$(if $(call _EQ,$(__nil),$(call _get,$(1),__outer__)),\
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,\
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$(call ENV_FIND,$(call _get,$(1),__outer__),$(2)))))
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ENV_GET = $(foreach env,|$(call ENV_FIND,$(1),$(2))|,$(if $(call _EQ,||,$(env)),$(call _error,'$(2)' not found),$(call _get,$(strip $(subst |,,$(env))),$(subst =,$(__equal),$(2)))))
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ENV_SET = $(if $(call _assoc!,$(1),$(subst =,$(__equal),$(2)),$(3)),$(1),)
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endif
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