Struct ExpandOptions 

#[non_exhaustive]
pub struct ExpandOptions {
    pub rules: ReferenceRules,
    pub scope: ExpandScope,
    pub lookup_order: LookupOrder,
    pub unresolved: Unresolved,
    pub max_depth: usize,
    pub max_value_bytes: usize,
}

Explicit resolution policy and resource limits.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

rules: ReferenceRules

Quote, escape and operator eligibility rules.

scope: ExpandScope

Sequential or whole-file bindings.

lookup_order: LookupOrder

Caller lookup versus file binding precedence.

unresolved: Unresolved

Treatment of an eligible reference with no value.

max_depth: usize

Maximum active binding and reference nesting depth.

max_value_bytes: usize

Maximum resolved bytes for one entry value.

Implementations

impl ExpandOptions

pub const fn with_rules(self, value: ReferenceRules) -> Self

Use the given reference eligibility rules.

pub const fn with_scope(self, value: ExpandScope) -> Self

Use the given resolution scope.

pub const fn with_lookup_order(self, value: LookupOrder) -> Self

Use the given lookup precedence.

pub const fn with_unresolved(self, value: Unresolved) -> Self

Use the given unresolved-reference policy.

pub const fn with_max_depth(self, value: usize) -> Self

Set the maximum nesting depth.

pub const fn with_max_value_bytes(self, value: usize) -> Self

Set the maximum resolved value size.

impl ExpandOptions

pub const fn portable() -> Self

Portable-style basic variables with file-first sequential bindings.

pub const fn compose() -> Self

Compose-style operators and nesting with file-first sequential bindings.

pub const fn dotenv_expand() -> Self

dotenv-expand-style rules with file-first sequential bindings.

pub const fn none() -> Self

No variable forms are eligible; values remain literal.

Trait Implementations

impl Clone for ExpandOptions

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ExpandOptions

impl Debug for ExpandOptions

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

Formats the value using the given formatter.

impl Default for ExpandOptions

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ExpandOptions

impl Hash for ExpandOptions

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ExpandOptions

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ExpandOptions