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| -rw-r--r-- | research/arrays.txt | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/research/arrays.txt b/research/arrays.txt new file mode 100644 index 0000000..9fa3fa2 --- /dev/null +++ b/research/arrays.txt @@ -0,0 +1,100 @@ +Syntax: + + array=(1 2) + array[0]=3 + push ${array} 4 + # Instead of Bash's ${array[@]} or ${array[*]}: + string=$(join ', ' ${array}) + value=${array[0]} + unset array[0] + unset array + array=(1 (2 3) 4) + array=(one=1 two=2) + +Compiles to: + + __a_new __r0 1 2 + array=${__r0} + __a_set array 0 3 + push ${array} 4 + string=$(join ', ' ${array}) + __a_get __r0 array 0 + __a_unset array 0 + __a_new __r0 2 3 + __a_new __r1 1 ${__r0} 4 + array=${__r1} + __a_new __r0 one=1 two=2 + array=${__r0} + +eshrt functions: + + __a_n=0 # malloc-like, how do we free? + __a_new() + { + __r=${1} + shift 1 + + __a=__a${__a_n} + __a_n=$((${__a_n} + 1)) + __l=0 + for __v in "${@}"; do + case ${__v} in + *=*) + __k=${__v%%=*} + __v=${__v#*=} + ;; + *) + __k=${__l} + ;; + esac + eval "${__a}__${__k}=\${__v}" + __l=$((${__l} + 1)) + done + eval "${__a}_l=\${__l}" + eval "${__r}=\${__a} + } + __a_set() + { + __a=${1} + __k=${2} + __v=${3} + + if ! eval "\${${__a}__${__k}+:}"; then + eval "${__a}_l=\$((\${${__a}_l} + 1))" + fi + eval "${__a}__${__k}=\${__v}" + } + __a_get() + { + __r=${1} + __a=${2} + __k=${3} + + eval "${__r}=\${${__a}__${__k}}" + } + __a_unset() + { + + } + +libesh functions: + + push() + { + __a=${1} + __v=${2} + + eval "__l=\${${__a}_l}" + if ! eval "\${${__a}__${__l}+:}"; then + eval "${__a}__${__l}=\${__v}" + eval "${__a}_l=\$((\${__l}))" + fi + } + split() + { + } + join() + { + } + +pop, shift (name collision), unshift, slice, etc. |