2015-02-10 23:59:50 +03:00
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#!/usr/bin/env bash
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2014-03-25 01:32:24 +04:00
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source $(dirname $0)/reader.sh
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2014-04-03 07:23:37 +04:00
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source $(dirname $0)/printer.sh
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source $(dirname $0)/env.sh
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2014-04-17 08:57:50 +04:00
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source $(dirname $0)/core.sh
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2014-03-25 01:32:24 +04:00
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2014-04-19 22:04:09 +04:00
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# read
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2014-03-25 01:32:24 +04:00
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READ () {
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2014-04-17 08:57:50 +04:00
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[ "${1}" ] && r="${1}" || READLINE
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2014-03-25 01:32:24 +04:00
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READ_STR "${r}"
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}
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2014-04-19 22:04:09 +04:00
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# eval
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2022-01-10 02:15:40 +03:00
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_symbol DEBUG-EVAL; debug_eval="$r"
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EVAL () {
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2014-03-25 01:32:24 +04:00
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local ast="${1}" env="${2}"
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2022-01-10 02:15:40 +03:00
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while true; do
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r=
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ENV_GET "$env" "$debug_eval"
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if [ -n "$__ERROR" ]; then
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__ERROR=
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elif [ "$r" != "$__false" -a "$r" != "$__nil" ]; then
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_pr_str "$ast" yes; echo "EVAL: $r / $env"
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fi
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2014-03-25 01:32:24 +04:00
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_obj_type "${ast}"; local ot="${r}"
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case "${ot}" in
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symbol)
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2014-12-19 05:33:49 +03:00
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ENV_GET "${env}" "${ast}"
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2014-03-25 01:32:24 +04:00
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return ;;
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list)
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2022-01-10 02:15:40 +03:00
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;;
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2014-03-25 01:32:24 +04:00
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vector)
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2022-01-10 02:15:40 +03:00
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_map_with_type _vector EVAL "${ast}" "${env}"
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return ;;
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2014-03-25 01:32:24 +04:00
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hash_map)
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2015-12-04 01:19:22 +03:00
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local res="" key= val="" hm="${ANON["${ast}"]}"
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2014-04-03 07:23:37 +04:00
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_hash_map; local new_hm="${r}"
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2014-03-25 01:32:24 +04:00
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eval local keys="\${!${hm}[@]}"
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for key in ${keys}; do
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eval val="\${${hm}[\"${key}\"]}"
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EVAL "${val}" "${env}"
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2014-04-03 07:23:37 +04:00
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_assoc! "${new_hm}" "${key}" "${r}"
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2014-03-25 01:32:24 +04:00
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done
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2022-01-10 02:15:40 +03:00
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r="${new_hm}"
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return ;;
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2014-03-25 01:32:24 +04:00
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*)
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2022-01-10 02:15:40 +03:00
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r="${ast}"
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return ;;
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2014-03-25 01:32:24 +04:00
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esac
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# apply list
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2017-10-11 22:57:07 +03:00
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_empty? "${ast}" && r="${ast}" && return
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2014-03-25 01:32:24 +04:00
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_nth "${ast}" 0; local a0="${r}"
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_nth "${ast}" 1; local a1="${r}"
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_nth "${ast}" 2; local a2="${r}"
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case "${ANON["${a0}"]}" in
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2014-12-19 05:33:49 +03:00
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def!) EVAL "${a2}" "${env}"
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[[ "${__ERROR}" ]] && return 1
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ENV_SET "${env}" "${a1}" "${r}"
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2014-03-25 01:32:24 +04:00
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return ;;
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2017-10-11 22:57:07 +03:00
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let__STAR__) ENV "${env}"; local let_env="${r}"
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2014-03-25 01:32:24 +04:00
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local let_pairs=(${ANON["${a1}"]})
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local idx=0
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#echo "let: [${let_pairs[*]}] for ${a2}"
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while [[ "${let_pairs["${idx}"]}" ]]; do
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EVAL "${let_pairs[$(( idx + 1))]}" "${let_env}"
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2014-12-19 05:33:49 +03:00
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ENV_SET "${let_env}" "${let_pairs[${idx}]}" "${r}"
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2014-03-25 01:32:24 +04:00
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idx=$(( idx + 2))
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done
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2014-04-24 06:59:50 +04:00
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ast="${a2}"
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env="${let_env}"
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# Continue loop
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;;
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2014-03-25 01:32:24 +04:00
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do) _count "${ast}"
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_slice "${ast}" 1 $(( ${r} - 2 ))
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2022-01-10 02:15:40 +03:00
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_map_with_type _list EVAL "${r}" "${env}"
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2014-03-25 01:32:24 +04:00
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[[ "${__ERROR}" ]] && r= && return 1
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2014-04-17 08:57:50 +04:00
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_last "${ast}"
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2014-03-25 01:32:24 +04:00
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ast="${r}"
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# Continue loop
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;;
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if) EVAL "${a1}" "${env}"
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2014-12-19 05:33:49 +03:00
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[[ "${__ERROR}" ]] && return 1
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2014-03-25 01:32:24 +04:00
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if [[ "${r}" == "${__false}" || "${r}" == "${__nil}" ]]; then
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# eval false form
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_nth "${ast}" 3; local a3="${r}"
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if [[ "${a3}" ]]; then
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ast="${a3}"
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else
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r="${__nil}"
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return
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fi
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else
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# eval true condition
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ast="${a2}"
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fi
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# Continue loop
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;;
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2017-10-11 22:57:07 +03:00
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fn__STAR__) _function "ENV \"${env}\" \"${a1}\" \"\${@}\"; \
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2014-04-03 07:23:37 +04:00
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EVAL \"${a2}\" \"\${r}\"" \
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"${a2}" "${env}" "${a1}"
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2014-03-25 01:32:24 +04:00
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return ;;
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2022-01-10 02:15:40 +03:00
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*) _map_with_type _list EVAL "${ast}" "${env}"
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2014-03-25 01:32:24 +04:00
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[[ "${__ERROR}" ]] && r= && return 1
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local el="${r}"
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2014-04-17 08:57:50 +04:00
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_first "${el}"; local f="${ANON["${r}"]}"
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_rest "${el}"; local args="${ANON["${r}"]}"
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2014-03-25 01:32:24 +04:00
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#echo "invoke: [${f}] ${args}"
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if [[ "${f//@/ }" != "${f}" ]]; then
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set -- ${f//@/ }
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ast="${2}"
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ENV "${3}" "${4}" ${args}
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env="${r}"
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else
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eval ${f%%@*} ${args}
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return
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fi
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# Continue loop
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;;
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esac
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done
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}
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2014-04-19 22:04:09 +04:00
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# print
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2014-03-25 01:32:24 +04:00
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PRINT () {
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if [[ "${__ERROR}" ]]; then
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_pr_str "${__ERROR}" yes
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r="Error: ${r}"
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__ERROR=
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else
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_pr_str "${1}" yes
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fi
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}
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2014-04-19 22:04:09 +04:00
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# repl
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2014-03-25 01:32:24 +04:00
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ENV; REPL_ENV="${r}"
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REP () {
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r=
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2014-05-11 00:45:36 +04:00
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READ "${1}"
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2014-04-17 08:57:50 +04:00
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EVAL "${r}" "${REPL_ENV}"
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2014-03-25 01:32:24 +04:00
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PRINT "${r}"
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}
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2014-04-17 08:57:50 +04:00
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# core.sh: defined using bash
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2014-12-19 05:33:49 +03:00
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_fref () {
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_symbol "${1}"; local sym="${r}"
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_function "${2} \"\${@}\""
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ENV_SET "${REPL_ENV}" "${sym}" "${r}"
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}
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2014-04-03 07:23:37 +04:00
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for n in "${!core_ns[@]}"; do _fref "${n}" "${core_ns["${n}"]}"; done
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2014-03-25 01:32:24 +04:00
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_eval () { EVAL "${1}" "${REPL_ENV}"; }
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_fref "eval" _eval
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2014-04-19 22:04:09 +04:00
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_list; argv="${r}"
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for _arg in "${@:2}"; do _string "${_arg}"; _conj! "${argv}" "${r}"; done
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2014-12-19 05:33:49 +03:00
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_symbol "__STAR__ARGV__STAR__"
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ENV_SET "${REPL_ENV}" "${r}" "${argv}";
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2014-03-25 01:32:24 +04:00
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2014-04-17 08:57:50 +04:00
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# core.mal: defined using the language itself
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2014-03-25 01:32:24 +04:00
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REP "(def! not (fn* (a) (if a false true)))"
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2019-07-16 00:57:02 +03:00
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REP "(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \"\nnil)\")))))"
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2014-03-25 01:32:24 +04:00
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2014-04-19 22:04:09 +04:00
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# load/run file from command line (then exit)
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2014-03-25 01:32:24 +04:00
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if [[ "${1}" ]]; then
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2014-04-19 22:04:09 +04:00
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REP "(load-file \"${1}\")"
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exit 0
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fi
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# repl loop
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while true; do
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READLINE "user> " || exit "$?"
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[[ "${r}" ]] && REP "${r}" && echo "${r}"
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done
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