quil_rs/parser/lexer/
error.rs

1// Copyright 2022 Rigetti Computing
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use crate::parser::error::{Error, InternalError};
16
17pub(crate) type InternalLexError<'a> = InternalError<super::LexInput<'a>, LexErrorKind>;
18/// An error that may occur while lexing Quil input.
19pub type LexError = Error<LexErrorKind>;
20
21/// Kinds of errors that may occur while lexing Quil input.
22#[derive(Clone, Debug, thiserror::Error, PartialEq, Eq)]
23#[non_exhaustive]
24pub enum LexErrorKind {
25    /// Expected this particular raw string.
26    #[error("expected {0:?}")]
27    ExpectedString(&'static str),
28    /// Expected this particular raw string in any case.
29    #[error("expected {0:?} (case-insensitive)")]
30    ExpectedCaseInsensitiveString(&'static str),
31    /// Expected something specific.
32    #[error("expected {0}")]
33    ExpectedContext(&'static str),
34    /// Expected a specific character.
35    #[error("expected character: '{0}'")]
36    ExpectedChar(char),
37    /// Encountered an unexpected EOF
38    #[error("unexpected EOF while parsing")]
39    UnexpectedEOF,
40    #[error("malformed number literal: {0}")]
41    BadNumber(#[from] lexical::Error),
42}