const type: category

Describes the category of a reference.

const category: (attr category) . value

Default value of category (SYMBOLOBJECT).

const func boolean: (in category: cat1) = (in category: cat2)

Check if two category values are equal.

Returns:

TRUE if both values are equal, FALSE otherwise.

const func boolean: (in category: cat1) <> (in category: cat2)

Check if two category values are not equal.

Returns:

FALSE if both values are equal, TRUE otherwise.

const func category: (attr category) conv (in integer: number)

Convert an integer number to category.

Returns:

the category result of the conversion.

const func category: (attr category) parse (in string: catName)

Convert a string to a category.

Parameters:

catName - Name of a category to be converted.

Returns:

the category result fo the conversion.

Raises:

RANGE_ERROR - If there is no corresponding category.

const func category: category (in string: catName)

Convert a string to a category.

Parameters:

catName - Name of a category to be converted.

Returns:

the category result fo the conversion.

Raises:

RANGE_ERROR - If there is no corresponding category.

const func integer: compare (in category: cat1, in category: cat2)

Compare two categories.

Returns:

-1, 0 or 1 if the first argument is considered to be respectively less than, equal to, or greater than the second.

const func integer: hashCode (in category: aCategory)

Compute the hash value of a category.

Returns:

the hash value.

const func integer: ord (in category: aCategory)

Determine the ordinal number of a category.

Returns:

a small integer which corresponds to aCategory.

const func category: category (in integer: number)

Convert an integer number to category.

Returns:

the category result of the conversion.

const func string: str (in category: aCategory)

Convert a category to a string.

Parameters:

aCategory - Category to be converted.

Returns:

the string result of the conversion.

Raises:

MEMORY_ERROR - Not enough memory to represent the result.

const proc: for (inout category: forVar) range (in category: startValue) to (in category: endValue) do (in proc: statements) end for

Category for-loop, looping from startValue upward to endValue. The variable forVar is initialized with startValue. The statements are executed repeatedly. After each repetition the variable forVar is incremented with forVar := category(succ(ord(forVar))). After the statements were executed with endValue the for-loop is terminated. If ord(startValue) is greater than ord(endValue) the statements are not executed at all.

const proc: for (inout category: forVar) range (in category: startValue) downto (in category: endValue) do (in proc: statements) end for

Category for-loop, looping from startValue downward to endValue. The variable forVar is initialized with startValue. The statements are executed repeatedly. After each repetition the variable forVar is decremented with forVar := category(pred(ord(forVar))). After the statements were executed with endValue the for-loop is terminated. If ord(startValue) is greater than ord(endValue) the statements are not executed at all.