Stack based interpreted programming language
In Fortuo a command is called a word. Several commands inside curly brackets are called WordSets. Comments start with % and span for the rest of the line.
| Name | Consumes | Result | Description |
|---|---|---|---|
clear |
- | - | Resets the interpreter. Clears stack, dictionary. |
delstack |
- | - | Deletes the contents of the stack. |
deldict |
- | - | Deletes the contents of the global dictionary. |
ccon |
- | - | Clears the console. |
| Name | Consumes | Result | Description |
|---|---|---|---|
. |
object | - | Pops the top object of the stack and prints it to the output. |
h |
Int | - | Prints integer in hex format (base 16). |
pstack |
- | - | Prints the stack to the standard output. |
pdict |
- | - | Prints the global dictionary to the output. |
cr |
- | - | Writes \r\n to the standard output. |
| Name | Consumes | Result | Description |
|---|---|---|---|
+ |
Int, Int | Int | Addition a + b |
- |
Int, Int | Int | Subtraction a - b |
* |
Int, Int | Int | Multiplication a * b |
/ |
Int, Int | Int | Integer Division a / b |
mod |
Int, Int | Int | Remainder of Integer Division a % b |
| Name | Consumes | Result | Description |
|---|---|---|---|
dup |
- | - | Duplicates the top object of the stack. |
swap |
- | - | Exchanges the 2 top objects of the stack. |
drop |
object | - | Removes the top item from the stack. |
| Name | Consumes | Result | Description |
|---|---|---|---|
/<name> |
- | NameDef | Pushes a NameDef object (Value = <name>) on the stack. |
def |
NameDef, object | - | Adds a entry to the global dictionary, which associates the object with the Name specified by the NameDef object. |
undef |
NameDef | - | Removes a entry from the global dictionary. |
| Name | Consumes | Result | Description |
|---|---|---|---|
{ |
- | StartSet | Pushes a StartSet object on the stack and starts recording a wordset. |
} |
objects | WordSet | Ends recording a wordset and pushes the resulting WordSet object on the stack. |
| Name | Consumes | Result | Description |
|---|---|---|---|
true, false |
- | Bool | Pushes bool on the stack. |
Integer |
- | Int | Pushes an integer on the stack. |
"string" |
- | String | Strings are enclosed by quotes. When pushing on the stack, the quotes are removed. |
| Name | Consumes | Result | Description |
|---|---|---|---|
neg |
Int | Int | Changes the sign. a = -a |
= |
Int, Int | Bool | equal a == b |
> |
Int, Int | Bool | greater than a > b |
< |
Int, Int | Bool | less than a < b |
| Name | Consumes | Result | Description |
|---|---|---|---|
not |
Bool | Bool | Inverts value. a = !a |
and |
Bool, Bool | Bool | logical and a && b |
or |
Bool, Bool | Bool | logical or a || b |
| Name | Consumes | Result | Description |
|---|---|---|---|
if |
Bool, WordSet | - | Executes the Wordset if Bool on the stack is true. |
ifelse |
Bool, WordSet, WordSet | - | Executes the first WordSet if the Bool on the stack is true, the seconds, if the Bool is false. |
| Name | Consumes | Result | Description |
|---|---|---|---|
exec |
String | - | Executes the file, specified by the String. |
| Name | Consumes | Result | Description |
|---|---|---|---|
linein |
- | String | Reads a line from the standard input and pushes it to the stack. |
| Name | Consumes | Result | Description |
|---|---|---|---|
len |
String | Int | Pushes the length of the top string on the stack. |
concat |
String, String | String | Pops 2 strings from the stack, concatenates them and pushes the result on the stack. |
comp |
String, String | Bool | Compares 2 strings. |
trim |
String | String | Removes all leading or trailing spaces. |
getchar |
String, Int | Int | Pushes the value of the character at the specified index of the string to the stack. |
substr |
String, Int, Int | String | Pushes a substring of the given string on the stack. Integer on top of stack is length, seconds integer is the startindex. |
| Name | Consumes | Result | Description |
|---|---|---|---|
repeat |
Int, WordSet | - | Executes the Wordset a given number of times. |
while |
Bool, WordSet | - | Executes a Wordset as long as Bool on top of stack is true. |
| Name | Consumes | Result | Description |
|---|---|---|---|
tostr |
Int or Bool | String Converts an Int or Bool to a String. | |
tobool |
Int | Bool | Converts an Int to a Bool. Result is true if integer is non-zero. |
| Name | Consumes | Result | Description |
|---|---|---|---|
list |
- | List | Pushes an empty list on the stack. |
count |
List | List, Int | Pushes the count of objects in list to the stack. |
add |
List, Object | List | Adds an object to the list. |
get |
List, Int | List, Object | Pushes the object of list at given index to the stack. |
set |
List, Object, Int | List | Sets the object at a given index. |
remove |
List, Int | List | Removes object at given index from list. |
[ |
- | StartList | Pushes a StartList object to the stack and starts recording a list. |
] |
objects | List | Ends recording a list and pushes the resulting list to the stack. |