Enum FormulaDslError 

pub enum FormulaDslError {
    ParseError {
        reason: String,
    },
    UnknownIdentifier {
        reason: String,
    },
    InvalidArgument {
        reason: String,
    },
    IncompatibleTerm {
        reason: String,
    },
    MalformedConfig {
        reason: String,
    },
}

Typed error surface for the formula DSL parser.

Every variant carries a free-form reason: String payload; Display emits exactly that payload, so converting a FormulaDslError into String (via the From impl below) is byte-equivalent to the pre- refactor Err(format!(...)) / Err("...".to_string()) strings that the same call sites produced. Public entry points keep their existing Result<_, String> signatures — CLI input handling stays unchanged — and typed errors flow across the boundary via From<FormulaDslError> for String.

Variants

ParseError

Pest grammar failure, unbalanced delimiters, empty terms, or missing required parse fragments — i.e. the formula text is not a well-formed DSL string.

Fields

reason: String

UnknownIdentifier

A referenced symbol (link name, blended-link component, term function name, top-level RHS identifier) is not part of the supported vocabulary.

Fields

reason: String

InvalidArgument

A named option’s value is unparseable, out of range, or not a finite number / valid integer.

Fields

reason: String

IncompatibleTerm

A combination of terms or options is disallowed (duplicate terms, multiple linkwiggle/link/survmodel, mutually exclusive option groups in bounded(), wiggle-incompatible links, etc.).

Fields

reason: String

MalformedConfig

A required configuration option is missing or empty (e.g. link() without type=, survmodel() with no options, bounded() without a required argument).

Fields

reason: String

Trait Implementations

impl Clone for FormulaDslError

fn clone(&self) -> FormulaDslError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FormulaDslError

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

Formats the value using the given formatter.

impl Display for FormulaDslError

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

Formats the value using the given formatter.

impl Eq for FormulaDslError

impl Error for FormulaDslError

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<FormulaDslError> for String

fn from(err: FormulaDslError) -> String

Converts to this type from the input type.

impl From<String> for FormulaDslError

Inbound conversion from String is used by ? cascades inside parse_formula and friends so that internal parser helpers still returning Result<_, String> can flow through without each call site needing an explicit .map_err(...). We route into ParseError because by construction every internal helper that still produces a raw String is itself a parse/term-resolution stage.

fn from(reason: String) -> Self

Converts to this type from the input type.

impl PartialEq for FormulaDslError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for FormulaDslError