language.md

Language

Formal Definition

<prog> -> <sequence>
<sequence> -> <command> | <sequence><command>
<command> -> <if> | <statement> | <loop> | <infinite>
<if> -> if <cond> <sequence> end | if <cond> <sequence> else <sequence> end | if <cond> <sequence> <elif> else <sequence> end
<elif> -> elif <cond> <sequence> <elif> | elif <cond> <sequence>
<cond> -> rustle | boom | wind | true
<loop> -> <int> times <sequence> end
<infinite> -> forever <sequence> end
<int>  -> <digit><int> | <digit>
<digit> -> 0|...|9
<statement> -> moveleft | moveright | stay

Informal Description

Statements

• moveleft, moveright

Conditions

• rustle - Hear within 1 (make a changeable value) spot.
• boom - If they hear a boom that means something bad will fall. "Hear" within zero spot.
• wind - More likely for apples to fall during wind.
• true / false

If/Elif/Else

if condition
    ...
elif condition
    ...
else
    ...
end

Loops

10 times
    ...
end

forever
    ...
end