# Pseudo BNF for Shrimp's grammar
```
<LIST> ::= <SUBLIST ;> | <SUBLIST &> | <SUBLIST>

<SUBLIST> ::=
    <PIPELINE && SUBLIST> | <PIPELINE> 
    <SUBLIST> | <PIPELINE>

<PIPELINE> ::=
    <STEP> <STD_PIPE> <PIPELINE>
    <STEP> <ERR_PIPE> <PIPELINE>
    <STEP>

<STD_PIPE> ::= "|"

<ERR_PIPE> ::= "|&"

<STEP> ::= [Collection of strings]\n | [Collection of strings];
```


## Redirections
Are done **at the Pipeline** level. 
* `<` Read File as input. If file does not exists, it fails
* `>` Write Output to a new File, or Overwrite file if existing
* `>>` Write new, or Append if existing, File as Output
* `&>` Redirects Stdout and Stderr to the file
* `&>>` Redirects Stdout and Stderr to the file, Appending it.

## Piping
* `|` Standard Pipe, standard output of one command is connected to the next command's standard input
* `|&` Connect the first command's standard error, in addition to its standard output, to the next command input