AoCScript

Grammar

Program				::= {Statement}
Statement			::= Assignment ";"
						| PrintStatement ";"
						| LoadStatement ";"
						| IfStatement ";"
						| LoopStatement ";"
						| AssertStatement ";"
						| ListDeclaration ";"
						| BreakStatement ";"
BreakStatement		::= "break" | "noloop"
ListDeclaration		::= ("sorted" | "unsorted") VariableType "list" Identifier
Assignment			::= ( Identifier | Identifier "[" Expression "]") ( "=" ( Expression | "LINE" | String ) | ListAssignment )
ListAssignment		::= "<<" Expression
PrintStatement		::= ( "print" | "simon says" ) ( Identifier | String | "DAY" )
LoadStatement		::= "load" String
IfStatement			::= "if" Expression ":" {Statement} "else" ":" {Statement} "end"
LoopStatement		::= "loop" ( Expression "times" | Iterator ) ":" {Statement} "loopstop"
Iterator			::= "DAY" "lines" | ( "LINE" | Identifier ) chars
AssertStatement		::= "assert" Expression ":" String
Expression			::= Logic { ("<" | ">" | "==" | "<=" | ">=" ) Logic | "is" ( "DIGIT" | "ALPHA" ) }
Logic				::= Term { ("+" | "-") Term}
Term				::= Factor { ("*" | "/" | "modulo" ) Factor | Cast}
Factor				::= Number
						| Identifier
						| Identifier "[" Expression "]"
						| Identifier "size"
						| "(" Expression ")"
						| Negate
						| String
Cast				::= "as" VariableType
VariableType		::= ( "INTEGER" | "STRING" | "FLOAT" )
Negate				::= "-" Factor
Identifier			::= Letter { Letter | Digit }
Number				::= Digit { Digit }
Letter				::=	"a" | ... |"z" | "A" | ... | "Z"    // Any alphabetical character, [a-zA-Z]
Digit				::= "0" | ... | "9"						// Any numeric digit [0-9]
String				::= \".*\"

TODO

[x] Need loading input file
[x] Need string character indexing
[x] Need character matching operators
[ ] Need string manipulations
[x] append
[ ] substring
[ ] split
[ ] Need string matching operators
[ ] Need string lengths
[x] Need a list data-structure : vector<int>.
[ ] Probably need multiline strings.
[ ] Need a map data-structure : map<string, int>.

Examples

Day 1

Code from "tests/aoc_day1.aoc":

Code from "examples/example7.aoc":

load "examples/example1.aoc";
print DAY;

a = 2;
print a;


print "SOME PRINT";
print "SOME FAILED PRINT";
print "SOME SUCCESS PRINT";
print "SOME RED PRINT";
print "SOME YELLOW PRINT";
print "SOME GREEN PRINT";
print "SOME BLUE PRINT";
print "SOME MAGENTA PRINT";
print "SOME CYAN PRINT";
print "SOME WHITE PRINT";
print "Colors are: GREEN CYAN GREEN YELLOW MAGENTA SUCCESS FAILED BLUE RED WHITE.";

Code from "examples/example5.aoc":

size = 10;
i = 0;
loop size times:
	simon says i;
	if i modulo 2 == 0:
		print "EVEN";
	else:
		print "ODD";
	end;
	i = i + 1;
loopstop;

print i;
assert i == size : "'i' must be equal to 'size' at this point";

print "SUCCESS!";

Results:

Run code : examples/example5.aoc
Simon Says: i   = 0
Simon Says: 'EVEN'
Simon Says: i   = 1
Simon Says: 'ODD'
Simon Says: i   = 2
Simon Says: 'EVEN'
Simon Says: i   = 3
Simon Says: 'ODD'
Simon Says: i   = 4
Simon Says: 'EVEN'
Simon Says: i   = 5
Simon Says: 'ODD'
Simon Says: i   = 6
Simon Says: 'EVEN'
Simon Says: i   = 7
Simon Says: 'ODD'
Simon Says: i   = 8
Simon Says: 'EVEN'
Simon Says: i   = 9
Simon Says: 'ODD'
Simon Says: i   = 10
Simon Says: 'SUCCESS!'