Language "IBAFlang"


Syntax Stmt:stmt ::= type id '=' exp ';'
				   | 'print' '(' exp ')' ';'
//				   | '{' stmt '}'
				   | stmt stmt
				   
				   
Syntax Typ:type ::= 'int'
                   | 'bool'
                   | id

Semantics execute[[ _:stmt ]] : => null

Rule execute[[ Typ Id '=' Exp ';' ]] = assign(bound(id[[ Id ]]), eval-exp[[ Exp ]])
Rule execute[[ 'print' '(' Exp ')' ';' ]] = print(eval-exp[[ Exp ]])

//Rule execute[[ '{' Stmt '}' ]] = scope(
//	collateral(collect-declared-vars[[ Stmt ]]),
//	execute[[ Stmt ]]
//)

Rule execute[[ Stmt1 Stmt2 ]] = sequential(execute[[ Stmt1 ]], execute[[ Stmt2 ]])



//Semantics collect-declared-vars[[ _:stmt ]] : (=>environments)*
//
//
//Rule collect-declared-vars[[ Typ Id '=' Exp ';' ]] = 
//	bind(
//		\"Id\", 
//		allocate-initialised-variable(
//			integers, //TODO: use type
//			eval-exp[[ Exp ]]
//		)
//	)
//Rule collect-declared-vars[[ Stmt ]] = null
//Rule collect-declared-vars[[ Stmt1 Stmt2 ]] = (collect-declared-vars[[ Stmt1 ]], collect-declared-vars[[ Stmt2 ]]))