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flowcontrol_test.sj
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flowcontrol_test.sj
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### Do
ClearAll(a,i,x,q)
a = 0
Do(a = a + 1 , [10])
T a == 10
(i = 0; Do( (i += 1; If(i>3, Break())) , [10]))
T i == 4
# Test that i is localized
a = 0
i = "zebra"
Do(a = a + i , [i,10])
T a == 55
T i == "zebra"
a = 0
Do(a = a + i , [i,10,1,-1])
T a == 55
a = 0
Do(a = a + x , [x,q, 5*q,q])
T a == 15*q
a = 0
Do(a = a + x , [x,5*q,q,-q])
T a == 15*q
a = 0
Do(a = a + x , [x,[1,2,3]])
T a == 6
ClearAll(a,i,x,q)
### For
m = [0,0,0]
For(i=1, i <= 3, i = i + 1, m[i] = i + 1)
T [2,3,4] == m
For(i=1,i<10, (Increment(i); If(i>3, Break())))
T i == 4
For(i=10,i>0, (Decrement(i); If(i<5, Break())))
T i == 4
# Giving the wrong number of arguments
# TODO. Implement Quiet to silence the warning messages.
T Head(For(1)) == For
T Head(For(1,2,3,4,5)) == For
ClearAll(m,i,res)
### While
ClearAll(i)
i = 0
While(i < 5, i = i + 1)
T i == 5
i = 0
T While(i < 5, (i = i + 1; If(i>2, Break()))) == Null
T i == 3
ClearAll(i)
n = 1
While(n<10,
(n += 1; If(n>3, Break()); n))
T n == 4
ClearAll(n)
ClearAll(i,sum)
sum = 0
Do( sum += i, [i,[1,2,3,4,5]])
T Head(i) == Symbol
T sum == 15
ClearAll(i,sum)
n = 1
T While( (n += 1) < 4) == Null
T n == 4
ClearAll(n)
(m = 0; n = 0)
T While( (n += 1) < 10, ( If(n>3, Continue()); m += n) ) == Null
T n == 10
T m == 6
### If
T If(True,1) == 1
T If(False,1,True)
T If("cat",1,2,True)
T If(False,1) == Null
T Head(If(a == b, 1, 2)) == If
ClearAll(retv)
#### Break, Continue, Return
T (1;2;Return(0);3;4) == Return(0)
n = 0
T Do( (n += i; If(n>3, Return("dog"))) , [i,10]) == "dog"
n = 0
T For(i=1, i<100, i += 1, (If(i>3, Continue()); n += i)) == Null
T i == 100
T n == 6
T For(i=1, i<100, i += 1, If(i>3,Return(0))) == Return(0)
T i == 4
ClearAll(n,i)
n = 0
T Do( ( If(i>3, Continue()); n += i ) , [i,100]) == Null
T n == 6
T Head(i) == Symbol
ClearAll(n,i,m)
ClearTemporary()
#### Throw, Catch
T Catch(a) == a
T Catch(Throw(a)) == a
T Catch(Do( Throw(z), [i,10])) == z
T Catch(For(i=1, i<20, i += 1, If(i>3, Throw(i)))) == 4
T For(i=1, i<20, i += 1, If(i>3, Throw(i))) == Throw(4)
T Catch((a;b;Throw(c);d)) == c
T (a;b;Throw(c);d) == Throw(c)
ClearAll(a,b,c,z,f,i)
f(x_):=(If((x > 3),Throw(z),x, "thirdbranch"))
T Catch(Nest(f,4,5)) == z
T Catch(Nest(f,3,5)) == 3
T Catch(NestList(f,3,5)) == [3,3,3,3,3,3]
T Catch(NestList(f,4,5)) == z
T Catch(Throw(x,u),u) == x
T Catch(Catch(Throw(x,u)),u) == x
ClearAll(f,x,z,u)
ClearTemporary()