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Ucode implements function scoping, make sure that let variables are
invisible outside of the function scope.
-- Expect stdout --
a_global=true
a_local=true
b_global=true
b_local=false
c_global=true
c_local=false
When seting a nonlocal variable, it is set in the nearest parent
scope containing the variable or in the root scope if the variable
was not found.
x=2
y=
z=1
Variables implicitly declared by for-in or counting for loops follow the same
scoping rules.
inner2 f_a=3
inner2 f_b=
inner2 f_c=3
inner2 f_d=
inner2 f_e=3
inner f_a=3
inner f_b=
inner f_c=3
inner f_d=
inner f_e=3
outer f_a=3
outer f_b=
outer f_c=
outer f_d=
outer f_e=3
-- End --
-- Testcase --
{%
a_global = true;
let a_local = true;
function test() {
b_global = true;
let b_local = true;
function test2() {
c_global = true;
let c_local = true;
}
test2();
}
test();
-%}
a_global={{ !!a_global }}
a_local={{ !!a_local }}
b_global={{ !!b_global }}
b_local={{ !!b_local }}
c_global={{ !!c_global }}
c_local={{ !!c_local }}
When seting a nonlocal variable, it is set in the nearest parent
scope containing the variable or in the root scope if the variable
was not found.
{%
x = 1;
function scope1() {
x = 2;
let y;
function scope2() {
// this does not set "y" in the root scope but overwrites the
// variable declared in the "scope1" function scope.
y = 2;
// this sets "z" in the root scope because it was not declared
// anywhere yet
z = 1;
}
scope2();
}
scope1();
-%}
x={{ x }}
y={{ y }}
z={{ z }}
Variables implicitly declared by for-in or counting for loops follow the same
scoping rules.
{%
function scope3() {
// f_a is not declared local and be set in the root scope
for (f_a = 1; f_a < 3; f_a++)
;
for (let f_b = 1; f_b < 3; f_b++)
;
let f_c;
function scope4() {
// f_c is not declared local but declared in the parent scope, it
// will be set there
for (f_c in [1, 2, 3])
;
for (let f_d in [1, 2, 3])
;
// f_e is not declared, it will be set in the root scope
for (f_e in [1, 2, 3])
;
print("inner2 f_a=", f_a, "\n");
print("inner2 f_b=", f_b, "\n");
print("inner2 f_c=", f_c, "\n");
print("inner2 f_d=", f_d, "\n");
print("inner2 f_e=", f_e, "\n");
print("\n");
}
scope4();
print("inner f_a=", f_a, "\n");
print("inner f_b=", f_b, "\n");
print("inner f_c=", f_c, "\n");
print("inner f_d=", f_d, "\n");
print("inner f_e=", f_e, "\n");
print("\n");
}
scope3();
print("outer f_a=", f_a, "\n");
print("outer f_b=", f_b, "\n");
print("outer f_c=", f_c, "\n");
print("outer f_d=", f_d, "\n");
print("outer f_e=", f_e, "\n");
%}
-- End --
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