59 lines
1.2 KiB
Rust
59 lines
1.2 KiB
Rust
#![allow(clippy::upper_case_acronyms)]
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mod new;
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mod test;
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use std::fmt;
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use crate::{
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ast::{ASTItem, AST},
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identifier::{Id, IdStore},
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};
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pub struct Parser {
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id_store: IdStore<ASTItem>,
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}
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impl Parser {
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pub(crate) fn new() -> Self {
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Self { id_store: IdStore::new() }
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}
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pub(crate) fn parse(&mut self, input: &str) -> Result<AST, ParseError> {
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use peg::str::LineCol;
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new::schala_parser::program(input, self).map_err(|err: peg::error::ParseError<LineCol>| {
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let msg = err.to_string();
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ParseError { msg, location: err.location.offset.into() }
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})
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}
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fn fresh(&mut self) -> Id<ASTItem> {
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self.id_store.fresh()
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}
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}
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/// Represents a parsing error
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#[derive(Debug)]
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pub struct ParseError {
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pub msg: String,
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pub location: Location,
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}
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#[derive(Debug, Clone, Copy, PartialEq, Default)]
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pub struct Location {
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pub(crate) offset: usize,
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}
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impl From<usize> for Location {
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fn from(offset: usize) -> Self {
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Self { offset }
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}
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}
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impl fmt::Display for Location {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.offset)
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}
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}
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