goscript_parser/
errors.rs

1use super::position;
2use std::cell::{Ref, RefCell};
3use std::fmt;
4use std::rc::Rc;
5
6#[derive(Clone, Debug)]
7pub struct Error {
8    pub pos: position::Position,
9    pub msg: String,
10    pub soft: bool,
11    pub by_parser: bool, // reported by parser (not type checker)
12    order: usize,        // display order
13}
14
15impl fmt::Display for Error {
16    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
17        let p = if self.by_parser { "[Parser]" } else { "[TC]" };
18        write!(f, "{} {}  {}\n", p, self.pos, self.msg)?;
19        Ok(())
20    }
21}
22
23#[derive(Clone, Debug)]
24pub struct ErrorList {
25    errors: Rc<RefCell<Vec<Error>>>,
26}
27
28impl fmt::Display for ErrorList {
29    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
30        write!(f, "Result: {} errors\n", self.errors.borrow().len())?;
31        for e in self.errors.borrow().iter() {
32            e.fmt(f)?;
33        }
34        Ok(())
35    }
36}
37
38impl ErrorList {
39    pub fn new() -> ErrorList {
40        ErrorList {
41            errors: Rc::new(RefCell::new(vec![])),
42        }
43    }
44
45    pub fn add(&self, p: position::Position, msg: String, soft: bool, by_parser: bool) {
46        let order = if msg.starts_with('\t') {
47            self.errors
48                .borrow()
49                .iter()
50                .rev()
51                .find(|x| !x.msg.starts_with('\t'))
52                .unwrap()
53                .pos
54                .offset
55        } else {
56            p.offset
57        };
58        self.errors.borrow_mut().push(Error {
59            pos: p,
60            msg: msg,
61            soft: soft,
62            by_parser: by_parser,
63            order: order,
64        });
65    }
66
67    pub fn len(&self) -> usize {
68        self.errors.borrow().len()
69    }
70
71    pub fn sort(&mut self) {
72        self.errors.borrow_mut().sort_by_key(|e| e.order);
73    }
74
75    pub fn borrow(&self) -> Ref<Vec<Error>> {
76        self.errors.borrow()
77    }
78}
79
80#[derive(Clone, Debug)]
81pub struct FilePosErrors<'a> {
82    file: &'a position::File,
83    elist: &'a ErrorList,
84}
85
86impl<'a> FilePosErrors<'a> {
87    pub fn new(file: &'a position::File, elist: &'a ErrorList) -> FilePosErrors<'a> {
88        FilePosErrors {
89            file: file,
90            elist: elist,
91        }
92    }
93
94    pub fn add(&self, pos: position::Pos, msg: String, soft: bool) {
95        let p = self.file.position(pos);
96        self.elist.add(p, msg, soft, false);
97    }
98
99    pub fn add_str(&self, pos: position::Pos, s: &str, soft: bool) {
100        self.add(pos, s.to_string(), soft);
101    }
102
103    pub fn parser_add(&self, pos: position::Pos, msg: String) {
104        let p = self.file.position(pos);
105        self.elist.add(p, msg, false, true);
106    }
107
108    pub fn parser_add_str(&self, pos: position::Pos, s: &str) {
109        self.parser_add(pos, s.to_string());
110    }
111}
goscript_parser/errors.rs

goscript_parser/
errors.rs
