librashader/librashader-preprocess/src/error.rs
2022-11-30 22:50:57 -05:00

39 lines
1.4 KiB
Rust

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