49 lines
1.5 KiB
Rust
49 lines
1.5 KiB
Rust
use std::path::PathBuf;
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use thiserror::Error;
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/// Error type for preset parsing.
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#[derive(Error, Debug)]
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pub enum ParsePresetError {
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/// An error occurred when tokenizing the preset file.
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#[error("shader preset lexing error")]
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LexerError { offset: usize, row: u32, col: usize },
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/// An error occurred when parsing the preset file.
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#[error("shader preset parse error")]
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ParserError {
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offset: usize,
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row: u32,
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col: usize,
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kind: ParseErrorKind,
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},
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/// The scale type was invalid.
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#[error("invalid scale type")]
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InvalidScaleType(String),
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/// The preset reference depth exceeded 16.
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#[error("exceeded maximum reference depth (16)")]
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ExceededReferenceDepth,
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/// An absolute path could not be found to resolve the shader preset against.
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#[error("shader presets must be resolved against an absolute path")]
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RootPathWasNotAbsolute,
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/// An IO error occurred when reading the shader preset.
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#[error("the file was not found during resolution")]
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IOError(PathBuf, std::io::Error),
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/// The shader preset did not contain valid UTF-8 bytes.
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#[error("expected utf8 bytes but got invalid utf8")]
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Utf8Error(Vec<u8>),
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}
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/// The kind of error that may occur in parsing.
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#[derive(Debug)]
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pub enum ParseErrorKind {
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/// Expected an indexed key (i.e. `shader0`, `shader1`, ...)
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Index(&'static str),
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/// Expected a signed integer.
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Int,
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/// Expected an unsigned integer.
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UnsignedInt,
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/// Expected a float.
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Float,
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/// Expected a boolean.
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Bool,
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}
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