cplex_rs/
constraints.rs

1use std::ffi::c_char;
2
3use crate::VariableId;
4
5#[derive(Copy, Clone, Debug)]
6pub enum ConstraintType {
7    LessThanEq,
8    Eq,
9    GreaterThanEq,
10}
11
12impl ConstraintType {
13    pub(crate) fn into_raw(self) -> c_char {
14        match self {
15            ConstraintType::LessThanEq => 'L' as c_char,
16            ConstraintType::Eq => 'E' as c_char,
17            ConstraintType::GreaterThanEq => 'G' as c_char,
18        }
19    }
20}
21
22#[derive(Clone, Debug)]
23pub struct Constraint {
24    weights: Vec<(VariableId, f64)>,
25    type_: ConstraintType,
26    rhs: f64,
27    name: Option<String>,
28}
29
30impl Constraint {
31    pub fn new(
32        ty: ConstraintType,
33        rhs: f64,
34        name: Option<String>,
35        vars: Vec<(VariableId, f64)>,
36    ) -> Constraint {
37        Constraint {
38            weights: vars,
39            type_: ty,
40            rhs,
41            name,
42        }
43    }
44
45    pub fn name(&self) -> Option<&str> {
46        self.name.as_deref()
47    }
48
49    pub fn weights(&self) -> &[(VariableId, f64)] {
50        &self.weights
51    }
52
53    pub fn rhs(&self) -> f64 {
54        self.rhs
55    }
56
57    pub fn type_(&self) -> ConstraintType {
58        self.type_
59    }
60}
cplex_rs/constraints.rs

cplex_rs/
constraints.rs
