Primordial Magic DSL Example

An example automaton that creates a small burst of fire.

# Program start
start ->                    # 0;

# Gather energy
set R1 => 2 : Fire          # 3;
set R2 => 1 : Water         # 5;

# Wait until a target is chosen then execute the rest, this sets TARGET register
on target jump target       # 10;

target ->                   # 10;

# Combine Fire and Water to get Fire and Energy
set R1, R2 => R1 + R2       # 15;

# Combine Energy with Direction to get Force
set R2 => R2 + TARGET       # 19;

# Apply force to fire to gain a missile
set R1 => R1 + R2           # 23;

# Release the energy of the missile to finish the spell
release R1                  # 24;

Primordial Magic DSL Grammar

WIP Grammar for a DSL that can be used to represent the Primordial Magic Automata

Tokens

$identifier ::=     [a-z][a-zA-Z0-9_]*
$number     ::=     [0-9]+
$comment    ::=     #.*\n
$typeID     ::=     [A-Z][a-z]*
$register   ::=     R[0-7] | TARGET
$eventID    ::=     touch | target

Grammar

@label      ::=     $identifier

@label_def  ::=     @label ->
             
@jump       ::=     jump @label
             
@event      ::=     on $eventType jump @label; 
# Blocking, sets TARGET when activated

@branch     ::=     branch @expr jump @label;
             |      branch @expr jump @label else @label;

@expr       ::=     $register
             |      @constant
             |      @comparison
             |      @expr + @expr
             |      !@expr
             |      isnull @expr
             
             
@comparison ::=     @expr < @expr
             |      @expr <= @expr
             |      @expr = @expr
             |      @expr > @expr
             |      @expr >= @expr
             
@constant   ::=     $number : $typeID

@set        ::=     set $register(, $register)* => @expr

@release    ::=     release $register