Struct Def 

pub struct Def {
    pub symbol: String,
    pub lib: String,
    pub is_: Vec<String>,
    pub tag_on: Vec<String>,
    pub of: Option<String>,
    pub mandatory: bool,
    pub doc: String,
    pub tags: HDict,
}

A single Haystack 4 definition loaded from Trio.

Each def has a symbol (name), belongs to a library, and has an inheritance chain via the is tag. Additional metadata such as tagOn, of, mandatory, and doc describe how the def relates to entity types and other defs.

Fields

symbol: String

Def name, e.g. "ahu" or "lib:phIoT".

lib: String

Library name, e.g. "phIoT".

is_: Vec<String>

Supertype symbols from the is tag.

tag_on: Vec<String>

Entity types this tag applies to (tagOn).

of: Option<String>

Target type for refs/choices (of tag).

mandatory: bool

Whether this tag is mandatory on entities.

doc: String

Human-readable documentation string.

tags: HDict

Full HDict of all meta tags on this def.

Implementations

impl Def

pub fn kind(&self) -> DefKind

Derive the def kind from its supertype chain.

Priority order:

1. "lib" in is_ -> DefKind::Lib
2. "choice" in is_ -> DefKind::Choice
3. "entity" in is_ -> DefKind::Entity
4. "val" or "scalar" in is_ -> DefKind::Val
5. "feature" in is_ -> DefKind::Feature
6. "-" in symbol -> DefKind::Conjunct
7. default -> DefKind::Marker

Trait Implementations

impl Clone for Def

fn clone(&self) -> Def

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Def

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

Formats the value using the given formatter.

impl PartialEq for Def

fn eq(&self, other: &Self) -> 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 Eq for Def