Enum BuildError 

#[non_exhaustive]
pub enum BuildError {
    Io(Error),
}

Infrastructure failure raised by the library-mode build flow.

Surfaces filesystem I/O against $OUT_DIR, OUT_DIR lookup failures, and input-validation rejections (malformed program paths) the builder catches before handing off to the pipeline. Distinct from:

• [crate::CodegenError] — user-source errors caught during codegen.
• [crate::common::InternalError] — compiler invariant violations that render as “please file a bug” ICEs.

[Diagnostic::is_internal] returns false for every BuildError variant, so a top-level renderer (e.g. [crate::common::emit_and_exit]) exits with code 1 and omits the bug-report note — the user fixes their build setup, not their .dl program.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Io(Error)

An io::Error surfaced by the build pipeline. Covers genuine I/O (writes to $OUT_DIR, OUT_DIR lookup) as well as input-validation rejections wrapped as io::ErrorKind::InvalidInput — e.g. a program path with no usable file stem or non-UTF-8 bytes.

Trait Implementations

impl Debug for BuildError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for BuildError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for BuildError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for BuildError

fn from(source: Error) -> Self

Converts to this type from the input type.