1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
use std::clone::Clone;
use std::fmt::{Debug, Formatter, Error};
use std::collections::HashMap;
#[derive(Clone, PartialEq)]
pub struct ModelicaModel {
pub name: String,
pub components: Vec<Component>,
pub equations: Vec<SimpleEquation>,
pub connections: Vec<Connection>,
pub extends: Vec<String>,
}
#[derive(Copy, Clone, PartialEq)]
pub enum ComponentPrefix {
// incomplete: eg, can be parameter and input
Flow,
Stream,
Input,
Output,
Discrete,
Parameter,
Constant,
}
#[derive(Clone, PartialEq)]
pub struct Component {
pub prefix: Option<ComponentPrefix>,
pub specifier: String,
pub name: String,
pub value: Option<Expr>,
pub units: Option<String>,
pub description: Option<String>,
}
#[derive(Clone, PartialEq)]
pub struct Connection {
pub a: String,
pub b: String,
}
#[derive(Clone, PartialEq)]
pub struct SimpleEquation {
pub lhs: Expr,
pub rhs: Expr,
}
#[derive(Clone, PartialEq)]
pub enum Expr {
Integer(i64),
Float(f64),
Ident(String),
Der(Box<Expr>),
Abs(Box<Expr>),
BinExpr(BinOperator, Box<Expr>, Box<Expr>),
}
#[derive(Copy, Clone, PartialEq)]
pub enum BinOperator {
Multiply,
Divide,
Add,
Subtract,
}
//// Helpers
impl ModelicaModel {
pub fn get_constant_vars(&self) -> HashMap<String,Option<Expr>> {
let mut binds = HashMap::new();
// XXX: actually implement this...
for c in &self.components {
match c.prefix {
Some(ComponentPrefix::Constant) => { binds.insert(c.name.clone(), Some(Expr::Integer(123))); },
Some(ComponentPrefix::Parameter) => { binds.insert(c.name.clone(), Some(Expr::Float(4.56))); },
_ => (),
}
}
binds
}
// This crude function finds "unbound" variables: those which are not constants, parameters, or
// the sole element on the LHS of an equation.
// Bugs:
// if a var is on LHS and RHS of same equation
pub fn get_free_vars(&self) -> Vec<String> {
// Start with components, and remove constants and parameters
let vars = self.components.iter().filter(|v| match v.prefix {
Some(ComponentPrefix::Constant) | Some(ComponentPrefix::Parameter) => false,
_ => true,
});
// Remove LHS (bound) vars
let mut outputs = vec![];
for eq in self.equations.iter() {
// TODO:
if let Expr::Ident(ref symb) = eq.lhs {
outputs.push(symb.to_string());
}
}
let vars = vars.filter(|v| !outputs.contains(&v.name));
vars.map(|c| c.name.clone()).collect()
}
}
fn union_strings(a: &Vec<String>, b: &Vec<String>) -> Vec<String> {
let mut u = a.clone();
for e in b {
if !(u.contains(&e)) {
u.push(e.clone());
}
}
u
}
impl Expr {
// Order is undefined
// TODO: should return a HashSet, not a Vec
pub fn identifiers(&self) -> Vec<String> {
use self::Expr::*;
match *self {
Integer(_) | Float(_) => vec![],
Ident(ref s) => vec![s.clone()],
Der(ref e) | Abs(ref e) => e.identifiers(),
BinExpr(_, ref e1, ref e2) => {
union_strings(&e1.identifiers(), &e2.identifiers())
},
}
}
pub fn contains(&self, ident: &str) -> bool{
self.identifiers().contains(&ident.to_string())
}
}
impl SimpleEquation {
// Order is undefined
pub fn identifiers(&self) -> Vec<String> {
union_strings(&self.lhs.identifiers(), &self.rhs.identifiers())
}
pub fn contains(&self, ident: &str) -> bool{
let s = &ident.to_string();
self.lhs.identifiers().contains(s) || self.rhs.identifiers().contains(s)
}
}
//// Debug Implementations
impl Debug for ModelicaModel {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
try!(write!(fmt, "model {}\n", self.name));
for e in self.extends.iter() {
try!(write!(fmt, " extends {};\n", e));
}
for v in self.components.iter() {
try!(write!(fmt, " {:?};\n", v));
}
try!(write!(fmt, "equation\n"));
for c in self.connections.iter() {
try!(write!(fmt, " {:?};\n", c));
}
for e in self.equations.iter() {
try!(write!(fmt, " {:?};\n", e));
}
write!(fmt, "end {};\n", self.name)
}
}
impl Debug for ComponentPrefix {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
use self::ComponentPrefix::*;
write!(fmt, "{}",
match *self {
Flow => "flow",
Stream => "stream",
Input => "input",
Output => "output",
Discrete => "discrete",
Parameter => "parameter",
Constant => "constant",
})
}
}
impl Debug for Component {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
write!(fmt, "{}{} {}",
match self.prefix {
Some(p) => format!("{:?} ", p),
None => "".to_string(),
},
self.specifier,
self.name,
)
}
}
impl Debug for Connection {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
write!(fmt, "connect({}, {})", self.a, self.b)
}
}
impl Debug for SimpleEquation {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
write!(fmt, "{:?} = {:?}", self.lhs, self.rhs)
}
}
impl Debug for Expr {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
use self::Expr::*;
match *self {
Integer(e) => write!(fmt, "{}", e),
Float(e) => write!(fmt, "{}", e),
Ident(ref e) => write!(fmt, "{}", e),
Der(ref e) => write!(fmt, "der({:?})", e),
Abs(ref e) => write!(fmt, "abs({:?})", e),
BinExpr(op, ref l, ref r) => write!(fmt, "({:?} {:?} {:?})", l, op, r),
}
}
}
impl Debug for BinOperator {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
use self::BinOperator::*;
match *self {
Multiply => write!(fmt, "*"),
Divide => write!(fmt, "/"),
Add => write!(fmt, "+"),
Subtract => write!(fmt, "-"),
}
}
}
|
