rsedn/parser/
form.rs

1use std::fmt::Display;
2
3use chrono::{DateTime, Local};
4use uuid::Uuid;
5
6use crate::lexer::lexeme::Lexeme;
7
8#[derive(Debug, Clone)]
9pub struct Form<'source> {
10    pub kind: FormKind<'source>,
11    pub lexeme: Lexeme,
12}
13
14#[derive(Debug, Clone, PartialEq)]
15pub enum FormKind<'source> {
16    List(Vec<Form<'source>>),
17    Vector(Vec<Form<'source>>),
18    Map(Vec<(Form<'source>, Form<'source>)>),
19    Set(Vec<Form<'source>>),
20    Keyword(&'source str),
21    Symbol(&'source str),
22    Tagged(&'source str, Box<Form<'source>>),
23    Discard(&'source str),
24    Integer(i64),
25    Float(f64),
26    Boolean(bool),
27    Character(char),
28    String(String),
29    Inst(DateTime<Local>),
30    UUID(Uuid),
31    Nil,
32}
33
34impl PartialEq for Form<'_> {
35    fn eq(&self, other: &Self) -> bool {
36        self.kind == other.kind
37    }
38}
39
40impl<'source> Display for Form<'source> {
41    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
42        match &self.kind {
43            FormKind::List(forms) => {
44                write!(f, "( ")?;
45                for form in forms {
46                    write!(f, "{} ", form)?;
47                }
48                write!(f, ")")
49            }
50            FormKind::Vector(forms) => {
51                write!(f, "[ ")?;
52                for form in forms {
53                    write!(f, "{} ", form)?;
54                }
55                write!(f, "]")
56            }
57            FormKind::Map(forms) => {
58                write!(f, "{{ ")?;
59                for (key, value) in forms {
60                    write!(f, "{} {}, ", key, value)?;
61                }
62                write!(f, "}}")
63            }
64            FormKind::Set(forms) => {
65                write!(f, "#{{ ")?;
66                for form in forms {
67                    write!(f, "{} ", form)?;
68                }
69                write!(f, "}}")
70            }
71            FormKind::Keyword(span) => write!(f, ":{}", span),
72            FormKind::Symbol(span) => write!(f, "{}", span),
73            FormKind::Tagged(span, form) => write!(f, "#{} {}", span, form),
74            FormKind::Inst(dt) => write!(f, "#inst \"{}\"", dt.to_rfc3339()),
75            FormKind::UUID(uuid) => write!(f, "#uuid \"{}\"", uuid.as_hyphenated()),
76            FormKind::Discard(span) => write!(f, "#_{}", span),
77            FormKind::Integer(span) => write!(f, "{}", span),
78            FormKind::Float(span) => write!(f, "{}", span),
79            FormKind::Boolean(span) => write!(f, "{}", span),
80            FormKind::Character(span) => write!(
81                f,
82                "\\{}",
83                match span {
84                    '\n' => "newline",
85                    '\r' => "return",
86                    '\t' => "tab",
87                    ' ' => "space",
88                    c => return write!(f, "\\{}", c),
89                }
90            ),
91            FormKind::String(span) => write!(f, "\"{}\"", span),
92            FormKind::Nil => write!(f, "nil"),
93        }
94    }
95}
rsedn/parser/form.rs

rsedn/parser/
form.rs
