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mbegin <body> repeat ( -- any ) ( -- )
The "mbegin" instruction is a shortcut for "begin tmark while", and it has
the same behaviour.
or <body> then ( any -- any )
Takes a value from the stack. If it is true, leaves it there and skips the
body, otherwise removes it and executes the body.
=== Case blocks ===
A case block consists of (case) with the cases listed inside of the () after
the word "case". Each case consists of two tokens inside of their own
parentheses. The first token may be any one of:
|
>
>
>
>
|
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2237
2238
2239
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2241
2242
2243
2244
2245
2246
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|
mbegin <body> repeat ( -- any ) ( -- )
The "mbegin" instruction is a shortcut for "begin tmark while", and it has
the same behaviour.
or <body> then ( any -- any )
Takes a value from the stack. If it is true, leaves it there and skips the
body, otherwise removes it and executes the body.
Any of the keywords "if", "while", and "until" in the above constructions
can optionally have a comma prefix; if they do, then the value remains on
the top of the stack if it is true, and is only popped if it is zero.
=== Case blocks ===
A case block consists of (case) with the cases listed inside of the () after
the word "case". Each case consists of two tokens inside of their own
parentheses. The first token may be any one of:
|