graphix_compiler/typ/
tval.rs

1use super::{PrintFlag, Type};
2use crate::{env::Env, typ::format_with_flags};
3use fxhash::FxHashSet;
4use netidx::publisher::Value;
5use netidx_value::NakedValue;
6use poolshark::local::LPooled;
7use std::fmt;
8
9/// A value with it's type, used for formatting
10pub struct TVal<'a> {
11    pub env: &'a Env,
12    pub typ: &'a Type,
13    pub v: &'a Value,
14}
15
16impl<'a> TVal<'a> {
17    fn fmt_int(
18        &self,
19        f: &mut fmt::Formatter<'_>,
20        hist: &mut FxHashSet<(usize, usize)>,
21    ) -> fmt::Result {
22        if !self.typ.is_a(&self.env, &self.v) {
23            return format_with_flags(PrintFlag::DerefTVars, || {
24                eprintln!("error, type {} does not match value {:?}", self.typ, self.v);
25                write!(f, "{}", NakedValue(self.v))
26            });
27        }
28        match (&self.typ, &self.v) {
29            (
30                Type::Primitive(_)
31                | Type::Abstract { .. }
32                | Type::Bottom
33                | Type::Any
34                | Type::Fn(_)
35                | Type::Error(_),
36                v,
37            ) => {
38                write!(f, "{}", NakedValue(v))
39            }
40            (Type::Ref { .. }, v) => match self.typ.lookup_ref(&self.env) {
41                Err(e) => write!(f, "error, {e:?}"),
42                Ok(typ) => {
43                    let typ_addr = (typ as *const Type).addr();
44                    let v_addr = (self.v as *const Value).addr();
45                    if !hist.contains(&(typ_addr, v_addr)) {
46                        hist.insert((typ_addr, v_addr));
47                        Self { typ, env: self.env, v }.fmt_int(f, hist)?
48                    }
49                    Ok(())
50                }
51            },
52            (Type::Array(et), Value::Array(a)) => {
53                write!(f, "[")?;
54                for (i, v) in a.iter().enumerate() {
55                    Self { typ: et, env: self.env, v }.fmt_int(f, hist)?;
56                    if i < a.len() - 1 {
57                        write!(f, ", ")?
58                    }
59                }
60                write!(f, "]")
61            }
62            (Type::Array(_), v) => write!(f, "{}", NakedValue(v)),
63            (Type::Map { key, value }, Value::Map(m)) => {
64                write!(f, "{{")?;
65                for (i, (k, v)) in m.into_iter().enumerate() {
66                    Self { typ: key, env: self.env, v: k }.fmt_int(f, hist)?;
67                    write!(f, " => ")?;
68                    Self { typ: value, env: self.env, v: v }.fmt_int(f, hist)?;
69                    if i < m.len() - 1 {
70                        write!(f, ", ")?
71                    }
72                }
73                write!(f, "}}")
74            }
75            (Type::Map { .. }, v) => write!(f, "{}", NakedValue(v)),
76            (Type::ByRef(_), v) => write!(f, "{}", NakedValue(v)),
77            (Type::Struct(flds), Value::Array(a)) => {
78                write!(f, "{{")?;
79                for (i, ((n, et), v)) in flds.iter().zip(a.iter()).enumerate() {
80                    write!(f, "{n}: ")?;
81                    match v {
82                        Value::Array(a) if a.len() == 2 => {
83                            Self { typ: et, env: self.env, v: &a[1] }.fmt_int(f, hist)?
84                        }
85                        _ => write!(f, "err")?,
86                    }
87                    if i < flds.len() - 1 {
88                        write!(f, ", ")?
89                    }
90                }
91                write!(f, "}}")
92            }
93            (Type::Struct(_), v) => write!(f, "{}", NakedValue(v)),
94            (Type::Tuple(flds), Value::Array(a)) => {
95                write!(f, "(")?;
96                for (i, (t, v)) in flds.iter().zip(a.iter()).enumerate() {
97                    Self { typ: t, env: self.env, v }.fmt_int(f, hist)?;
98                    if i < flds.len() - 1 {
99                        write!(f, ", ")?
100                    }
101                }
102                write!(f, ")")
103            }
104            (Type::Tuple(_), v) => write!(f, "{}", NakedValue(v)),
105            (Type::TVar(tv), v) => match &*tv.read().typ.read() {
106                None => write!(f, "{}", NakedValue(v)),
107                Some(typ) => TVal { env: self.env, typ, v }.fmt_int(f, hist),
108            },
109            (Type::Variant(n, flds), Value::Array(a)) if a.len() >= 2 => {
110                write!(f, "`{n}(")?;
111                for (i, (t, v)) in flds.iter().zip(a[1..].iter()).enumerate() {
112                    Self { typ: t, env: self.env, v }.fmt_int(f, hist)?;
113                    if i < flds.len() - 1 {
114                        write!(f, ", ")?
115                    }
116                }
117                write!(f, ")")
118            }
119            (Type::Variant(_, _), Value::String(s)) => write!(f, "`{s}"),
120            (Type::Variant(_, _), v) => write!(f, "{}", NakedValue(v)),
121            (Type::Set(ts), v) => match ts.iter().find(|t| t.is_a(&self.env, v)) {
122                None => write!(f, "{}", NakedValue(v)),
123                Some(t) => Self { typ: t, env: self.env, v }.fmt_int(f, hist),
124            },
125        }
126    }
127}
128
129impl<'a> fmt::Display for TVal<'a> {
130    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
131        self.fmt_int(f, &mut LPooled::take())
132    }
133}
graphix_compiler/typ/tval.rs

graphix_compiler/typ/
tval.rs
