Struct WriteContext 

pub struct WriteContext(/* private fields */);

Extra contextual info for accurating recreating read tables when writing

This entirely exists to handle the edge case where you read a table, remove all of its rows, and then try to write it. If there are optional rowed values, there is no clear way to know if a column should be written as zero or rowed.

This is used by the utf_table macro. When a table is read, a context is created with the state of the columns. When a table is created, a context is created and configured based on the schema provided to the macro.

It is untested whether or not this approach holds, so this type is subject to removal.

Implementations

impl WriteContext

pub fn new() -> Self

Creates a new write context

pub fn is_included(&self, column_name: &str) -> bool

Returns true if the given column should be included (rowed), or false if it should be excluded (zero)

pub fn set_inclusion_state(&mut self, column_name: &'static str, included: bool)

Sets the inclusion state of a column. true denotes rowed, false denotes zero