Utpl implements C-style if/else conditions and ?: ternary statements.

Like with for- and while-loops, an alternative syntax form suitable
for template blocks is supported.


-- Expect stdout --
This should print "one":
one

This should print "two":
two

Multiple conditions can be used by chaining if/else statements:
three

If the conditional block consists of only one statement, the curly
braces may be omitted:
two

An if-condition using the alternative syntax:
Variable x has another value.


An if-condition using the special "elif" keyword in alternative syntax mode:
Variable x was set to five.


Ternary expressions function similar to if/else statements but
only allow for a single expression in the true and false branches:
Variable x is one
-- End --

-- Testcase --
This should print "one":
{%
	x = 0;

	if (x == 0) {
		print("one");
	}
	else {
		print("two");
	}
%}


This should print "two":
{%
	x = 1;

	if (x == 0) {
		print("one");
	}
	else {
		print("two");
	}
%}


Multiple conditions can be used by chaining if/else statements:
{%
	x = 2;

	if (x == 0) {
		print("one");
	}
	else if (x == 1) {
		print("two");
	}
	else if (x == 2) {
		print("three");
	}
	else {
		print("four");
	}
%}


If the conditional block consists of only one statement, the curly
braces may be omitted:
{%
	x = 5;

	if (x == 0)
		print("one");
	else
		print("two");
%}


An if-condition using the alternative syntax:
{% if (x == 1): -%}
Variable x was set to one.
{% else -%}
Variable x has another value.
{% endif %}


An if-condition using the special "elif" keyword in alternative syntax mode:
{% if (x == 0): -%}
Variable x was set to zero.
{% elif (x == 1): -%}
Variable x was set to one.
{% elif (x == 5): -%}
Variable x was set to five.
{% else -%}
Variable x has another value.
{% endif %}


Ternary expressions function similar to if/else statements but
only allow for a single expression in the true and false branches:
{%
	x = 1;
	s = (x == 1) ? "Variable x is one" : "Variable x has another value";

	print(s);
%}

-- End --