Add ideal peg as text file

peg.txt

@@ -0,0 +1,49 @@
+program		:= __* stmt*
+
+stmt		:= assignment /
+		   funcall stop /
+		   conditional / 
+		   expr stop
+		   
+expr		:= - _ expr /
+ 		   expr "+" _ expr /
+		   expr "-" - expr /
+		   expr "*" _ expr /
+		   expr "/" _ expr /
+		   "(" _ expr ")" /
+		   ['"'] ((!['"'] [_] / #"\""#)*) ['"'] /
+		   funcall /
+		   fundef /
+		   boolean /
+		   id /
+		   num
+		
+boolean		:= ("true" / "false") _
+id		:= letter (letter / digit / ['?'|'.'|'-'])* _
+num		:= (digit+ "."? digit* / "." digit+) _
+
+assignment	:= id "<-" _ expr stop
+funcall		:= id "(" _ expr ** ("," _) ")" _
+funcdef		:= id? "->" _ block
+
+conditional	:= if __* elif* __* else? __*
+if		:= "if" _ expr block
+elif		:= "elif" _ expr block
+else		:= "else" _ block
+
+block		:= expr / indented_block
+indented_block	:= stop indent __* stmt+ dedent
+
+letter		:= ['A'..='Z'] / ['a'..='z']
+digit		:= ['0'..='9']
+
+stop		:= __+ / eof
+indent		:= ">>>"
+dedent		:= "<<<"
+
+_		:= ['\t'|' ']*
+__		:= comment? newline / comment &eof
+comment		:= "#" (!newline [_])* &(newline / eof)
+newline		:= "\r\n" \ "\r" \ "\n"
+
+eof		:= ![_]