T3X Manual: Statements

T3X - A Minimum Procedural Language
Version 8.1.5, Online Edition Copyright(C) 1996-2004
Nils M Holm

Statement	Description
`lvalue := expr;`	Assign the value of expr to lvalue
`IF (expr) stmt`	Run stmt, if expr is true
`IE (expr) stmt-T ELSE stmt-F`	Run stmt-t, if expr is true and stmt-f, if expr is false
`WHILE (expr) stmt`	Repeat stmt while expr is true
`FOR (var=start, limit, cexpr) stmt`	Count from start to limit-cexpr using cexpr increments. If cexpr is negative, count down to limit+cexpr. Run stmt in each step. Start and limit are expressions.
`FOR (var=start, limit) stmt`	Short form of `FOR (var=start, limit, 1) ...`
`LEAVE;`	Leave the innermost `WHILE` or `FOR` loop
`LOOP;`	Restart the innermost `WHILE` or `FOR` loop. In `FOR` loops, go to the increment step.
`RETURN expr;`	Leave the current procedure and return expr to the calling procedure.
`RETURN;`	Short form of `RETURN 0;`
`HALT cexpr;`	Terminate program, deliver exit code cexpr
`HALT;`	Short form of `HALT 0;`
`pname(a1, ..., aN);`	Call procedure pname with arguments a1...aN
`CALL ptr(a1, ..., aN);`	Indirect procedure call through ptr
`iname.mname(a1, ..., aN);`	Send message mname with arguments a1...aN to object (instance) iname
`SEND(ptr, cname, mname(a1, ..., aN));`	Send message mname to the object of class cname pointed to by ptr
`DO decls ... stmts ... END`	Compound statement. Both declarations (decls) and statements (stmts) are optional.
`;`	Empty statement