= = = SILC (SIMPLE INTEGER AND LIST CODE) = = =
Designed and Implemented by Jack Eisenmann
SILC is an interpreted programming language which is 50% joke and 50% "serious business". Features include:
To use SILC, download the source code and compile it. Use GCC or something. If you have a Mac, you can download the compiled binary.
SILC is newline sensitive, but not space or tab sensitive. A program consists of newline separated commands. Each command has the following format:
(function value) (argument) (argument) (argument)...
For example:
PRINT "HELLO"
SILC has three data types: 64-bit signed integer, variable size list, and function reference.
An integer literal consists of a whole number. Ex: 58, 7. No major surprises here.
A list literal consists of space separated expressions enclosed by curly braces. Ex: {2 4 8 16 32 64}.
A string literal consists of characters enclosed by quotation marks. Ex: "HELLO". Use a backslash to write a quotation mark or newline in a string. Ex: "I SAY \"HOWDY\" TO YOU.\nTHIS IS ANOTHER LINE." Remember that strings are actually lists of ASCII code integers.
SILC supports many of the standard C operators:
-# + - * / % ~ | & ^ ! || && == != > >= < <= []
Note that the -# operator is the unary negation operator.
Here is a list of every built-in SILC function:
DECLARE (name): Declares a variable in the given scope.
KEEP (value) (destination): Stores the given value in the destination.
IS_INTEGER (value) (destination): Determines whether the given value is an integer.
IS_LIST (value) (destination): Determines whether the given value is a list.
IS_FUNCTION (value) (destination): Determines whether the given value is a function.
GET_LENGTH (list) (destination): Retrieves the length of the given list.
SET_LENGTH (length) (list): Sets the length of the given list. Either truncates the list or extends the list with zeroes.
IF (condition): Executes the following code block only if the given condition is true.
END: Terminates the current code block.
ELSE_IF (condition): Executes the following code block if the given condition is true and none of the preceding conditions were true.
ELSE: Executes the following code block if none of the preceding conditions were true.
WHILE: Executes the following code block while the given condition is true.
CONTINUE: Jumps to the beginning of the current WHILE loop.
BREAK: Jumps outside to the end of the current WHILE loop.
FUNCTION (function name) (arg name) (arg name) (arg name)...: Declares a variable containing a function. The function is defined by the given argument variable names and the following code block. Arguments are passed by reference.
RETURN: Exits from the current function.
PRINT (list): Prints the given string.
PROMPT (destination): Prompts a string from the user.
IMPORT (file name): Imports the given file and executes the code in the file.
Comments are preceded by a number sign. Ex: # WACKY COMMENT. Each comment must be placed on its own line.
Example code (prime number generation):
FUNCTION IS_PRIME INPUT_NUMBER DESTINATION
DECLARE FACTOR
KEEP 2 FACTOR
WHILE FACTOR < INPUT_NUMBER
IF INPUT_NUMBER % FACTOR == 0
KEEP 0 DESTINATION
RETURN
END
KEEP FACTOR + 1 FACTOR
END
KEEP 1 DESTINATION
END
DECLARE NUMBER
KEEP 2 NUMBER
WHILE NUMBER < 100
DECLARE RESULT
IS_PRIME NUMBER RESULT
IF RESULT
PRINT NUMBER
END
KEEP NUMBER + 1 NUMBER
END
SILC libraries:
Other resources: