Extension

Extension is an esolang(s) by User:ChuckEsoteric08 to make FakeScript Turing-complete with as small additions as possible

Specification

Version 1

!label and goto commands were deleted. Variables a-z were added and #x would return value of variable x

if [arg1] [arg2]

If [arg1] [arg2] are equal would execute code between this command and matching endif

input [arg1]

Would set variable [arg1] to to user input

set [arg1]

Would concatenate every outputted string and stores result in variable [arg1]. Then clears output

for [arg1]

Start of for loop, and each cycle a character from string [arg1] is printed. Loop stops only when every character from the string is outputed

end

Ends for loop. Note that if and for could be nested

Turing completeness proof of Version 1

Version 1 could be proved Turing complete by this Cyclic Tag interpreter:

input a
print ;
input b
print #b
print :
set #b
for #a
set c
if #c ;
for #b
set d
if #d ;
print 1
set f
endif
if #d 0
if #f 0
print #e
print 0
set e
endif
print 0
set f
endif
if #d 1
if #f 0
print #e
print 0
set e
endif
print 0
set f
endif
end
print #e
set b
print ?
set e
print 0
set f
endif
if #c 0
for #b
set d
if #d ;
print 1
set f
endif
if #d 0
if #f 0
print #e
print 0
set e
endif
if #f 1
print 2
set f
endif
endif
if #d 1
if #f 0
print #e
print 0
set e
endif
if #f 1
print 0
set f
endif
endif
end
if #f 0
print #e
print 0
set b
print ?
set e
print 0
set f
endif
if #c 1
for #b
set d
if #d ;
print 1
set f
endif
if #d 0
if #f 0
print #e
print 0
set e
endif
if #f 1
print 2
set f
endif
endif
if #d 1
if #f 0
print #e
print 0
set e
endif
if #f 1
print 0
set f
endif
endif
end
if #f 0
print #e
print 1
set b
print ?
set e
print 0
set f
endif
print #a
print #a
set a
end