### BUGS
-  (read-file "nonexisting/file.csv") shows only "could not open file" - should print filename
- better error reporting..for example ls_dir on non existing dir should prind `pwd` dir


### TODO
- add debug support, at least call stack
- multiline editing (kilo editor)
- execute system command should capture stderr
- add some mem stats to benchmark
- create pastebin like web using ml
#### Code
- documentation
- rename constants in ml_profiler.h
- replace to_string macro in ml.cpp
- add url of source/inspiration to clib/*.cpp
- add instrumentation (time, nr of evals, num of atoms, debug info, debug environment etc)
#### Language
- support for "t" symbol as a true 
- support for exceptions
- string functions
    - compare - needed for sorting, cmp ignore case
    - regexp functions    
- date support
  - decode-universal-time
- env functions 
  - get-env, set-env; set-env cannot be implemented in stdlib.lsp, because popen is in fact subshell
- add include-stdlib function for other libs in stdlib dir (during startup stdlib.lsp is loaded only)
- syntax highlighting do VS Code

#### Performance
- define is one of most frequent callee, when in scope with very few vars, lookup sequentially
- first, second are often called -> implement in c++
- push_back - repeatedly without reserving size
- range - with for(int i...) and reserving result size can be 3times faster on (range 1 10000)
- mini_sprintf - unnecesary copying between vector and list
- (do, scope ..) repeatedly assign to acc

#### Compile
```
mkdir -p build
gcc -std=c99 -c -O2 -o linenoise.o clib/linenoise.c
c++ -c -O2  -I/usr/local/opt/openssl/include -Iclib --std=c++17  ml.cpp ml_io.cpp ml_date.cpp ml_string.cpp ml_util.cpp ml_profiler.cpp clib/json11.cpp clib/csvparser.cpp clib/sslclient.cpp clib/printf.cpp
// on linux c++ -o build/ml -O2 -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl *.o
c++ -o build/ml -O2 -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl -Wl,-stack_size -Wl,0x1000000 *.o
```
// or cmake

#### Install
```
cp build/ml /usr/local/bin/ml
cp stdlib/*.lsp /usr/local/var/mlisp/
```
or
```
utils/local_install.sh
```


### Example of use
```
ml -f tests/test.lsp
```

### Links
https://github.com/adam-mcdaniel/wisp
https://github.com/dropbox/json11
https://github.com/antirez/linenoise



#### read stdout and stderr from popen
https://stackoverflow.com/questions/478898/how-do-i-execute-a-command-and-get-the-output-of-the-command-within-c-using-po