44 lines
1.6 KiB
Rust
44 lines
1.6 KiB
Rust
use std::convert::Infallible;
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use std::path::PathBuf;
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use thiserror::Error;
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/// Error type for source preprocessing.
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#[derive(Error, Debug)]
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pub enum PreprocessError {
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/// The version header was not found in the source file.
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#[error("the version header was missing")]
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MissingVersionHeader,
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/// An IO error occurred when reading the source file.
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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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/// A known encoding was not found for the file.
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#[error(
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"a known encoding was not found for the file. supported encodings are UTF-8 and Latin-1"
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)]
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EncodingError(PathBuf),
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/// Unexpected EOF when reading the source file.
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#[error("unexpected end of file")]
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UnexpectedEof,
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/// Unexpected end of line when reading the source file.
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#[error("unexpected end of line")]
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UnexpectedEol(usize),
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/// An error occurred when parsing a pragma statement.
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#[error("error parsing pragma")]
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PragmaParseError(String),
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/// The given pragma was declared multiple times with differing values.
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#[error("duplicate pragma found")]
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DuplicatePragmaError(String),
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/// The image format requested by the shader was unknown or not supported.
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#[error("shader format is unknown or not found")]
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UnknownImageFormat,
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/// The stage declared by the shader source was not `vertex` or `fragment`.
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#[error("stage must be either vertex or fragment")]
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InvalidStage,
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}
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impl From<Infallible> for PreprocessError {
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fn from(_: Infallible) -> Self {
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unreachable!()
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}
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}
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