Drus-Ja

A program is Program Name; Var; … Start; … Finish;. It prints whole numbers, one per line, and has no other output.

Integer Number 5;

Declares a variable, in the Var block. Integer is the only type, 32 bits, signed.

Number -> Number + 1;

Assigns.

Output Number; Input Number;

Print a value. Read a line from the input box.

If (Number Ge 1); … Else; … EndIf;

Branches. Else is optional.

For Number; … Downto 1;

Counts Number down to 1, including 1. This is the only loop.

Arithmetic is + - Mul Div Mod. Conditions use == != Ge Le && || !!. Comments are /* like this */.

Names are exactly six letters and can't begin with a keyword, so Letter and Forest won't do. Bracket every comparison.

• Keywords match the front of any word, in any case. Letter reads as Le and then fails.
• 5-3 is two numbers. Write 5 - 3.
• Tabs are not allowed. The Tab key here inserts spaces.
• A comment swallows the character right after it, and a multi-line comment counts as one line, so later error numbers drift.
• Only Mul Div Mod bind tighter. Everything else shares one level, left to right.
• Ge and Le are strict, and so is !!(a Ge b): both are false when a equals b. Inside ||, all of these include equality.
• In a || b || c, c is never tested.
• (a && b) || c needs all three. (a || b) && c ignores c. In a || (b && c), only a decides.
• !! flips each test but does not swap && and ||.
• If (Number + 1); always takes the body. If (Number); fails with Unknown node type.
• An If with an Else needs a statement before the Else.
• !! can end a declaration in place of ;.
• The already declared error names the token after the variable.
• Everything after Finish; is ignored once it has passed the lexer.

• Programs the C++ accepts and ml would refuse get an Assembly error, in wording written for this page. That covers comparisons outside If, assigning to a number, Input or For on anything but a variable, and numbers over 32 bits.
• Unary - and !! outside a condition generate no code, so the original reads stack garbage. Here the program stops with a Runtime error. -5 is a number and works.
• Starting a variable from another copies its value. The original stored its address.
• Names that clash with MASM, like offset, buffer or StdOut, work here.
• Div or Mod by zero, and -2147483648 Div -1, stop with a Runtime error. The original process crashes.
• Output no longer leaks stack, so a long loop can't overflow it. Output stops at 64,000 characters instead.
• Press enter key to close program is not printed.
• Input takes one line at a time by atoi rules, and stale console buffer contents can't show through. With no line left the program stops, where the original would wait at the console.
• The C++ reads past its token list at the end of a file. Those errors point at the last token here, and undefined cycle and undefined if fire as intended.
• Error text is the original's, and its line number can drift. The marked line is always the real one.
• An empty program prints nothing. The original reports a missing file.
• The JavaScript has not been compared against a real MASM32 build.