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Two for-loop variants are supported: a C-style counting for loop
consisting of an initialization expression, a test condition
and a step expression and a for-in-loop variant which allows
enumerating properties of objects or items of arrays.
Additionally, utpl supports an alternative syntax suitable for
template block tags.
-- Expect stdout --
A simple counting for-loop:
Iteration 0
Iteration 1
Iteration 2
Iteration 3
Iteration 4
Iteration 5
Iteration 6
Iteration 7
Iteration 8
Iteration 9
If the loop body consists of only one statement, the curly braces
may be omitted:
Iteration 0
Iteration 1
Iteration 2
Iteration 3
Iteration 4
Iteration 5
Iteration 6
Iteration 7
Iteration 8
Iteration 9
Any of the init-, test- and increment expressions may be omitted.
Loop without initialization statement:
Iteration null
Iteration 1
Iteration 2
Loop without test statement:
Iteration 0
Iteration 1
Iteration 2
Loop without init-, test- or increment statement:
Iteration 1
Iteration 2
Iteration 3
For-in loop enumerating object properties:
Key: foo
Key: bar
For-in loop enumerating array items:
Item: one
Item: two
Item: three
A counting for-loop using the alternative syntax:
Iteration 0
Iteration 1
Iteration 2
Iteration 3
Iteration 4
Iteration 5
Iteration 6
Iteration 7
Iteration 8
Iteration 9
A for-in loop using the alternative syntax:
Item 123
Item 456
Item 789
-- End --
-- Testcase --
A simple counting for-loop:
{%
for (i = 0; i < 10; i++) {
print("Iteration ");
print(i);
print("\n");
}
%}
If the loop body consists of only one statement, the curly braces
may be omitted:
{%
for (i = 0; i < 10; i++)
print("Iteration ", i, "\n");
%}
Any of the init-, test- and increment expressions may be omitted.
Loop without initialization statement:
{%
for (; j < 3; j++)
print("Iteration " + j + "\n");
%}
Loop without test statement:
{%
for (j = 0;; j++) {
if (j == 3)
break;
print("Iteration ", j, "\n");
}
%}
Loop without init-, test- or increment statement:
{%
for (;;) {
if (k++ == 3)
break;
print("Iteration ", k, "\n");
}
%}
For-in loop enumerating object properties:
{%
obj = { foo: true, bar: false };
for (key in obj)
print("Key: ", key, "\n");
%}
For-in loop enumerating array items:
{%
arr = [ "one", "two", "three" ];
for (item in arr)
print("Item: ", item, "\n");
%}
A counting for-loop using the alternative syntax:
{% for (x = 0; x < 10; x++): -%}
Iteration {{ x }}
{% endfor %}
A for-in loop using the alternative syntax:
{% for (n in [123, 456, 789]): -%}
Item {{ n }}
{% endfor %}
-- End --
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