Conditions adn Loops¶

When using conditions or loops take in account what do You expect:

if it is preprocessor logic (e.g. if (<condition>) : use some code); regular for, while and if has to be used
if it is runtime logic (e.g. with If (<value of var == 1>) : run some code); special classes has to be used

all special classes are context-managers e.g. they are used within folowing syntax:

with If(<some condition>):
    do some code

If() -> Else()¶

Example:

with If((x == y) & (x != 2)):
    check()
    x += 1
with If(y == 1):
    check()
    x += 1
    with If(y != 2):
        check()
        x += 1
with Else((x != y) & (x == 1)):
    check()
    x += 1
with Else():
    check()
    y += 1

The first line inside the context block has to contain check() function for proper execution under tests.
Under tests works as normal if-else(elif) condition. if Else has bool argument it evaluates as elif.
every single bool expression has to be placed inside (round brackets)
instead of using and and or keywords, use bitwise & and |

Note

outside the If-Else and While & and | are just bitwise .and. and .or.

Select() -> Case()¶

Example:

with Select(x):
    with Case(1):
        check()
        y += 1
    with Case(2):
        check()
        y += 2
        with Select(y):
            with Case(2):
                check()
                y += 1
            with Case(3):
                check()
                CondFalse()

For()¶

Works as python foreach: for val in Iterable as well as for-range: for val in range(start, [stop, [step]])

ForEach Example:

with For(arr: KspNativeArray=array) as seq:
    for val in seq:
        # code

ForRange Example:

with For(start: int[, stop: int[, step: int]]) as seq:
    for val in seq:
        # code

Warning

do not use enumerate and zip not inside, not outside the loop. Inside You’ll get constant values as idx or second array; outside You’ll probably get an Error.

While()¶

Example:

with While() as w:
    while w(lambda x=x, y=y: x != y):
        with If(y != 10):
            check()
            y += 1
        x += 1

Yep, a little bit tricky) But while is much rarely used than for :)

Warning

Do not use CondFalse() and Brake() inside while. They’ll works in tests, but will not be counted at compilation.

Break(), CondFalse() and check()¶

Break()¶

Function to break For() loop. Equal to val = len(seq)

CondFalse¶

Function works as operator continue in python. For testing purpose, does not translates to KSP.

check()¶

Function for proper work of conditions under tests. Has to be on the first line of every context block.