Module pl.strict
Checks uses of undeclared global variables.
All global variables must be ‘declared’ through a regular assignment
(even assigning nil will do) in a main chunk before being used
anywhere or assigned to inside a function. Existing metatables __newindex and __index
metamethods are respected.
You can set any table to have strict behaviour using strict.module. Creating a new module with strict.closed_module makes the module immune to monkey-patching, if you don’t wish to encourage monkey business.
If the global PENLIGHT_NO_GLOBAL_STRICT is defined, then this module won’t make the
global environment strict - if you just want to explicitly set table strictness.
Functions
| module (name[, mod[, predeclared]]) | make an existing table strict. |
| make_all_strict (T) | make all tables in a table strict. |
| closed_module (mod, name) | make a new module table which is closed to further changes. |
Functions
- module (name[, mod[, predeclared]])
-
make an existing table strict.
Parameters:
- name string name of table (optional)
- mod
tab
table - if
nilthen we’ll return a new table (optional) - predeclared
tab
- table of variables that are to be considered predeclared.
Returns:
-
the given table, or a new table
- make_all_strict (T)
-
make all tables in a table strict.
So
strict.make_all_strict(_G)prevents monkey-patching of any global tableParameters:
- T tab
- closed_module (mod, name)
-
make a new module table which is closed to further changes.
Parameters:
- mod
- name