artichoke_backend/
parser.rs

1use std::borrow::Cow;
2
3use spinoso_exception::ScriptError;
4
5use crate::Artichoke;
6use crate::core::{ClassRegistry, IncrementLinenoError, Parser, TryConvertMut};
7use crate::error::{Error, RubyException};
8use crate::ffi::InterpreterExtractError;
9use crate::state::parser::Context;
10use crate::sys;
11
12impl Parser for Artichoke {
13    type Context = Context;
14    type Error = Error;
15
16    fn reset_parser(&mut self) -> Result<(), Self::Error> {
17        let mrb = unsafe { self.mrb.as_mut() };
18        let state = self.state.as_deref_mut().ok_or_else(InterpreterExtractError::new)?;
19        let parser = state.parser.as_mut().ok_or_else(InterpreterExtractError::new)?;
20        parser.reset(mrb);
21        Ok(())
22    }
23
24    fn fetch_lineno(&self) -> Result<usize, Self::Error> {
25        let state = self.state.as_deref().ok_or_else(InterpreterExtractError::new)?;
26        let parser = state.parser.as_ref().ok_or_else(InterpreterExtractError::new)?;
27        let lineno = parser.fetch_lineno();
28        Ok(lineno)
29    }
30
31    fn add_fetch_lineno(&mut self, val: usize) -> Result<usize, Self::Error> {
32        let state = self.state.as_deref_mut().ok_or_else(InterpreterExtractError::new)?;
33        let parser = state.parser.as_mut().ok_or_else(InterpreterExtractError::new)?;
34        let lineno = parser.add_fetch_lineno(val)?;
35        Ok(lineno)
36    }
37
38    fn push_context(&mut self, context: Self::Context) -> Result<(), Self::Error> {
39        let mrb = unsafe { self.mrb.as_mut() };
40        let state = self.state.as_deref_mut().ok_or_else(InterpreterExtractError::new)?;
41        let parser = state.parser.as_mut().ok_or_else(InterpreterExtractError::new)?;
42        parser.push_context(mrb, context);
43        Ok(())
44    }
45
46    fn pop_context(&mut self) -> Result<Option<Self::Context>, Self::Error> {
47        let mrb = unsafe { self.mrb.as_mut() };
48        let state = self.state.as_deref_mut().ok_or_else(InterpreterExtractError::new)?;
49        let parser = state.parser.as_mut().ok_or_else(InterpreterExtractError::new)?;
50        let context = parser.pop_context(mrb);
51        Ok(context)
52    }
53
54    fn peek_context(&self) -> Result<Option<&Self::Context>, Self::Error> {
55        let state = self.state.as_deref().ok_or_else(InterpreterExtractError::new)?;
56        let parser = state.parser.as_ref().ok_or_else(InterpreterExtractError::new)?;
57        let context = parser.peek_context();
58        Ok(context)
59    }
60}
61
62impl RubyException for IncrementLinenoError {
63    fn message(&self) -> Cow<'_, [u8]> {
64        Cow::Borrowed(b"parser exceeded maximum line count")
65    }
66
67    fn name(&self) -> Cow<'_, str> {
68        "ScriptError".into()
69    }
70
71    fn vm_backtrace(&self, interp: &mut Artichoke) -> Option<Vec<Vec<u8>>> {
72        let _ = interp;
73        None
74    }
75
76    fn as_mrb_value(&self, interp: &mut Artichoke) -> Option<sys::mrb_value> {
77        let message = interp.try_convert_mut(self.message()).ok()?;
78        let value = interp.new_instance::<ScriptError>(&[message]).ok().flatten()?;
79        Some(value.inner())
80    }
81}
82
83impl From<IncrementLinenoError> for Error {
84    fn from(exception: IncrementLinenoError) -> Self {
85        let err: Box<dyn RubyException> = Box::new(exception);
86        Self::from(err)
87    }
88}
artichoke_backend/parser.rs

artichoke_backend/
parser.rs
