Struct FeatureForm 

pub struct FeatureForm {
    pub head: String,
    pub fields: Vec<FieldValue>,
}

One feature expression form or one operation: a head word and its field values, in the order of FEATURE_EXPRESSION_FORMS or OPERATION_FORMS.

Fields

head: String

The form’s head word, such as precedence or pushMode.

fields: Vec<FieldValue>

The field values in table order.

Implementations

impl FeatureForm

pub fn new(head: impl Into<String>, fields: Vec<FieldValue>) -> Self

Builds a form from its head and field values.

pub fn spec(&self) -> FormFields

The table fields of this form, as an expression form or an operation.

pub fn field(&self, key: &str) -> Option<&FieldValue>

The value of the field key.

pub fn expression(&self, key: &str) -> Option<&GrammarExpr>

The expression of the field key.

pub fn expressions(&self, key: &str) -> &[GrammarExpr]

The expression list of the field key.

pub fn text(&self, key: &str) -> Option<&str>

The word, name or text of the field key.

pub fn integer(&self, key: &str) -> Option<i64>

The integer of the field key.

pub fn operation(&self, key: &str) -> Option<&Self>

The single operation of the field key.

pub fn operations(&self, key: &str) -> Option<&[Self]>

The operation list or block of the field key; None for an absent block.

pub fn for_each_expression<'a>( &'a self, visit: &mut impl FnMut(&'a GrammarExpr), )

Every grammar expression this form holds directly, operations included.

pub fn map_expressions(&mut self, map: &mut impl FnMut(&mut GrammarExpr))

Rewrites every grammar expression this form holds, operations included.

Trait Implementations

impl Clone for FeatureForm

fn clone(&self) -> FeatureForm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FeatureForm

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

Formats the value using the given formatter.

impl Eq for FeatureForm

impl PartialEq for FeatureForm

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FeatureForm