SML
SML
is a simple markup language. It is designed to convert human readable information into
Rust data-structures.
The format looks this,
hobbit:
name: "Frodo Baggins"
age: "98"
friends:
hobbit:
name: "Bilbo Baggins"
age: "176"
hobbit:
name: "Samwise Gamgee"
age: "66"
Data Format Rules
-
Indentation has meaning and is 4 spaces, relative to the top key.
-
All values must be double quoted.
-
Every key/value combination must be nested in a key. For example
hobbit: "Frodo"
by itself is invalid. It can be written:
hobbit:
name: "Frodo"
The motivation behind this is for the data format to distinguish clearly between whole data structures, which are headed by a key only, and parts of a data structure which are either key/value pairs, representing fields or variants, or other data-structures, which again are headed by a key only.
-
Separation of lines has meaning.
-
Keys may not include
:
. -
Double quotes in values must be escaped using
\"
. -
Everything after the second double quote is ignored (and can be used for commenting).
-
Empty lines or lines with whitespace only are ignored.
Basic Organization
ToSmall
trait to_string()
---> --->
------------- ----------- ----------
| data- | | Small | | String |
| structure | | | | |
------------- ----------- ----------
<--- <---
FromSmall from_str()
trait
Example
To convert from Small
to a data-structure,
use ;
and to convert from a data-structure to Small
,
use ;
println!;
// hobbit:
// name: "Frodo Baggins"
// age: "98"
// friends:
// hobbit:
// name: "Bilbo Baggins"
// age: "176"
// hobbit:
// name: "Samwise Gamgee"
// age: "66"