Refactor system variables system

Registered by Monty Taylor

Refactor the sys_var and plugin_sys_var system to be a single, C++, typesafe system with a pluggable implementation.

Blueprint information

Status:
Started
Approver:
None
Priority:
Low
Drafter:
Monty Taylor
Direction:
Needs approval
Assignee:
Andrew Hutchings
Definition:
Approved
Series goal:
Accepted for 7.1
Implementation:
Good progress
Milestone target:
None
Started by
Monty Taylor

Whiteboard

Work items:
remove sys_var_chain: DONE
add variable add method to module::Context: DONE
add a template sys_var class: TODO
add a constrained_value template class: DONE
migrate plugin_sys_var instances to sys_var: INPROGRESS
remove plugin_sys_var code: TODO
consolidate sys_var down to template sys_var: TODO
do a registerVariables inside of option_context for every command line option: TODO
make set_var store a std::string: TODO
make set_var run through size-suffix parsing: TODO

(?)

Work Items

Dependency tree

* Blueprints in grey have been implemented.

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