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Attila Magyar 2021-06-20 15:43:21 +02:00 committed by GitHub
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@ -15,7 +15,7 @@ The syntax is a superset of the Forth language. In FCL there are literal syntax
## Low-level control structures ## Low-level control structures
FCL supports the traditional Forth conditional and loop control structures. FCL supports the traditional Forth conditionals and loops.
General form of `if else then`. General form of `if else then`.
@ -66,7 +66,7 @@ The `limit` and `start` before the word `do` defines the number of times the loo
<limit> <start> do <loop-body> loop <limit> <start> do <loop-body> loop
``` ```
*Do* loops iterate through integers by starting at *start* and incrementing until you reach the *limit*. The word *i* pushes the loop index onto the stack. In a nested loop, the inner loop may access the loop variable of the outer loop by using the word *j*. *DO* loops iterate through integers by starting at *start* and incrementing until you reach the *limit*. The word *i* pushes the loop index onto the stack. In a nested loop, the inner loop may access the loop variable of the outer loop by using the word *j*.
For example: For example:
```forth ```forth
@ -182,7 +182,7 @@ A quotation can access to local variables of the enclosing word and have its own
sum @ ; sum @ ;
``` ```
Local variables are lexically scoped. If the quotation is called by another word, the `sum` still denotes the variable that was defined in the context where the quotation was originally created. Local variables are lexically scoped. If the quotation is called by another word, the `sum` still denotes the variable that was defined in the quotation's context.
Quotations don't act as lexical closures however. The parameter stack is unwinded after the enclosing function is returned. Quotations don't act as lexical closures however. The parameter stack is unwinded after the enclosing function is returned.