Crate expressive

Expressive, the whale language.

Re-exports

pub use crate::error::EvalexprError;

pub use crate::error::EvalexprResult;

Modules

error

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

Macros

context_map

This macro provides a convenient syntax for creating a static context.

math_consts_context

Context with all Rust’s constants in f64::consts available by default. Alternatively, specifiy constants with math_consts_context!(E, PI, TAU, ...) Available constants can be found in the core::f64::consts module.

Structs

Function

A user-defined function. Functions can be used in expressions by storing them in a Context.

Node

A node in the operator tree. The operator tree is created by the crate-level build_operator_tree method. It can be evaluated for a given context with the Node::eval method.

VariableMap

A context that stores its mappings in hash maps.

Enums

Operator

An enum that represents operators in the operator tree.

PartialToken

A partial token is an input character whose meaning depends on the characters around it.

Value

The value type used by the parser. Values can be of different subtypes that are the variants of this enum.

ValueType

The type of a Value.

Constants

EMPTY_VALUE

The value of the empty type to be used in rust.

Traits

Context

An immutable context.

ContextWithMutableFunctions

A context that allows to assign to function identifiers.

ContextWithMutableVariables

A context that allows to assign to variables.

Functions

build_operator_tree

Build the operator tree for the given expression string.

eval

Evaluate the given expression string.

eval_boolean

Evaluate the given expression string into a boolean.

eval_boolean_with_context

Evaluate the given expression string into a boolean with the given context.

eval_boolean_with_context_mut

Evaluate the given expression string into a boolean with the given mutable context.

eval_empty

Evaluate the given expression string into an empty value.

eval_empty_with_context

Evaluate the given expression string into an empty value with the given context.

eval_empty_with_context_mut

Evaluate the given expression string into an empty value with the given mutable context.

eval_float

Evaluate the given expression string into a float.

eval_float_with_context

Evaluate the given expression string into a float with the given context.

eval_float_with_context_mut

Evaluate the given expression string into a float with the given mutable context.

eval_int

Evaluate the given expression string into an integer.

eval_int_with_context

Evaluate the given expression string into an integer with the given context.

eval_int_with_context_mut

Evaluate the given expression string into an integer with the given mutable context.

eval_number

Evaluate the given expression string into a float. If the result of the expression is an integer, it is silently converted into a float.

eval_number_with_context

Evaluate the given expression string into a float with the given context. If the result of the expression is an integer, it is silently converted into a float.

eval_number_with_context_mut

Evaluate the given expression string into a float with the given mutable context. If the result of the expression is an integer, it is silently converted into a float.

eval_string

Evaluate the given expression string into a string.

eval_string_with_context

Evaluate the given expression string into a string with the given context.

eval_string_with_context_mut

Evaluate the given expression string into a string with the given mutable context.

eval_tuple

Evaluate the given expression string into a tuple.

eval_tuple_with_context

Evaluate the given expression string into a tuple with the given context.

eval_tuple_with_context_mut

Evaluate the given expression string into a tuple with the given mutable context.

eval_with_context

Evaluate the given expression string with the given context.

eval_with_context_mut

Evaluate the given expression string with the given mutable context.

Type Aliases

EmptyType

The type used to represent empty values in Value::Empty.

FloatType

The type used to represent floats in Value::Float.

IntType

The type used to represent integers in Value::Int.

Result

TupleType

The type used to represent tuples in Value::Tuple.