-- -*- M2-comint -*- hash: 14818694768140348671

i1 : (optionalSignParser @ constParser "abc" : charAnalyzer) "abc"

o1 = (1, abc)

o1 : Sequence

i2 : (optionalSignParser @ constParser "abc" : charAnalyzer) "+abc"

o2 = (1, abc)

o2 : Sequence

i3 : (optionalSignParser @ constParser "abc" : charAnalyzer) "-abc"

o3 = (-1, abc)

o3 : Sequence

i4 : 
