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use std::error::{Error};
use std::fmt;
use clang_sys::*;
use libc::{c_longlong};
use utility::{FromError};
macro_rules! error {
(
$(#[$meta:meta])*
pub enum $name:ident: $underlying:ty {
$(#[$variantdoc:meta] $variant:ident = ($error:pat, $message:expr)), +,
}
) => {
$(#[$meta])*
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum $name {
$(#[$variantdoc] $variant), +
}
impl Error for $name {
fn description(&self) -> &str {
match *self {
$($name::$variant => $message), +
}
}
}
impl From<$name> for String {
fn from(error: $name) -> String {
error.description().into()
}
}
impl FromError<$underlying> for $name {
fn from_error(error: $underlying) -> Result<(), $name> {
match error {
$($error => Err($name::$variant)), +,
_ => Ok(()),
}
}
}
impl fmt::Display for $name {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "{}", self.description())
}
}
};
}
error! {
pub enum AlignofError: c_longlong {
Dependent = (-3, "the type is a dependent type"),
Incomplete = (-2, "the type is an incomplete type"),
}
}
error! {
pub enum OffsetofError: c_longlong {
Dependent = (-3, "the record type is a dependent type"),
Incomplete = (-2, "the record type is an incomplete type"),
Name = (-5, "the record type does not contain a field with the supplied name"),
Parent = (-1, "the record type has an invalid parent declaration"),
}
}
error! {
pub enum SaveError: CXSaveError {
Errors = (CXSaveError_InvalidTU, "errors in the translation unit prevented saving"),
Unknown = (CXSaveError_Unknown, "an unknown error occurred"),
}
}
error! {
pub enum SizeofError: c_longlong {
Dependent = (-3, "the type is a dependent type"),
Incomplete = (-2, "the type is an incomplete type"),
VariableSize = (-4, "the type is a variable size type"),
}
}
error! {
pub enum SourceError: CXErrorCode {
AstDeserialization = (CXError_ASTReadError, "AST deserialization failed"),
Crash = (CXError_Crashed, "`libclang` crashed"),
Unknown = (CXError_Failure, "an unknown error occurred"),
}
}