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GDScript: Don't warn on unassigned for builtin-typed variables

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If the type of a variable is a built-in Variant type, then it will
automatically be assigned a default value based on the type. This means
that the explicit initialization may be unnecessary. Thus this commit
removes the warning in such case.

This also changes the meaning of the unassigned warning to happen when
the variable is used before being assigned, not when it has zero
assignments.
This commit is contained in:
George Marques
2024-04-09 14:15:51 -03:00
parent a7b860250f
commit 877802e252
10 changed files with 65 additions and 30 deletions
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11
modules/gdscript/tests/scripts/parser/warnings/unassigned_variable.gd
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@@ -1,2 +1,11 @@
func test():
var __
var unassigned
print(unassigned)
unassigned = "something" # Assigned only after use.
var a
print(a) # Unassigned, warn.
if a: # Still unassigned, warn.
a = 1
print(a) # Assigned (dead code), don't warn.
print(a) # "Maybe" assigned, don't warn.

15
modules/gdscript/tests/scripts/parser/warnings/unassigned_variable.out
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@@ -1,5 +1,16 @@
GDTEST_OK
>> WARNING
>> Line: 2
>> Line: 3
>> UNASSIGNED_VARIABLE
>> The variable "__" was used but never assigned a value.
>> The variable "unassigned" was used before being assigned a value.
>> WARNING
>> Line: 7
>> UNASSIGNED_VARIABLE
>> The variable "a" was used before being assigned a value.
>> WARNING
>> Line: 8
>> UNASSIGNED_VARIABLE
>> The variable "a" was used before being assigned a value.
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