[−][src]Module evalexpr::error

The error module contains the Error enum that contains all error types used by this crate.

The Error enum implements constructors for its struct variants, because those are ugly to construct.

The module also contains some helper functions starting with expect_ that check for a condition and return Err(_) if the condition is not fulfilled. They are meant as shortcuts to not write the same error checking code everywhere.

Enums

Error

Errors used in this crate.

Functions

expect_boolean	Returns `Ok(())` if the given value is a `Value::Boolean`, or `Err(Error::ExpectedBoolean)` otherwise.
expect_number	Returns `Ok(())` if the given value is numeric. Numeric types are `Value::Int` and `Value::Float`. Otherwise, `Err(Error::ExpectedNumber)` is returned.