Regular Expressions 101

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/
([+-](?:'.'|"."|[^+\- ][^ ]))
/
g
1st Capturing Group
([+-](?:'.'|"."|[^+\- ][^ ]))
Match a single character present in the list below
[+-]
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
+ matches the character + literally (case sensitive)
- matches the character - literally (case sensitive)
This hyphen is treated literally, which might be confusing for others. Consider escaping it or placing at the start or end of the class!
Non-capturing group
(?:'.'|"."|[^+\- ][^ ])
1st Alternative
'.'
' matches the character ' literally (case sensitive)
.
matches any character (except for line terminators)
+? matches the previous token between one and unlimited times, as few times as possible, expanding as needed (lazy)
' matches the character ' literally (case sensitive)
2nd Alternative
"."
" matches the character " literally (case sensitive)
.
matches any character (except for line terminators)
+? matches the previous token between one and unlimited times, as few times as possible, expanding as needed (lazy)
" matches the character " literally (case sensitive)
3rd Alternative
[^+\- ][^ ]
Match a single character not present in the list below
[^+\- ]
{1} matches the previous token exactly one time (meaningless quantifier)
+ matches the character + literally (case sensitive)
\- matches the character - literally (case sensitive)
matches the character literally (case sensitive)
Match a single character not present in the list below
[^ ]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
matches the character literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.

Regular Expression
No Match

/
/
g

Test String