This should parse parentheses correctly and handle (valid) gcodes such as
G1X2Y3, while before we were assuming spaces between tokens (which is wrong as
per the G-Code spec). This should fix req #333 in a clean and systematic way.
This is also a component for #343 (Marlin M114 response is in the form ok C:
X11Y22Z33E44, which we can parse with the same expression).
The computed duration is no more pessimistic, for a few reasons.
- the main one is that it does not take retraction into account
- Z moves are not taken into account either
- arcs are not supported
- the acceleration code seems to estimate acceleration time correctly but is
wrong for deceleration
So instead of telling the user this estimation is pessimistic, let's just tell
them this is an estimate.
Guillaume Seguin