Enum ProgramError 

pub enum ProgramError {
    Syntax {
        line: usize,
        message: String,
    },
    Json(String),
    UnsupportedVersion {
        found: u64,
        supported: u32,
    },
    Check(String),
    Data(String),
}

Why a program could not be read, written or compiled.

Runtime problems are not errors: once a program compiles, building and running its model never fails — see the module docs’ error policy.

Variants

Syntax

The text front end rejected the source.

Fields

line: usize

1-based line of the offending token.

message: String

What was expected and what was found.

Json(String)

The JSON front end could not decode the document.

UnsupportedVersion

The document’s fugue_program version is not one this build reads.

Fields

found: u64

The version the document declares.

supported: u32

The version this build reads (FORMAT_VERSION).

Check(String)

The program is well-formed but does not check: an unknown variable, distribution or function, a wrong argument count, a break outside a loop, a non-finite literal, a non-identifier name, or nesting beyond MAX_NESTING (which the text front end, refusing as it reads, reports as a Syntax error with its line).

Data(String)

The data payload is malformed.

Trait Implementations

impl Clone for ProgramError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProgramError

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

Formats the value using the given formatter.

impl Display for ProgramError

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

Formats the value using the given formatter.

impl Error for ProgramError

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 PartialEq for ProgramError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ProgramError