Struct EnvPlaceholderHandler 

pub struct EnvPlaceholderHandler;

Handles ENV: placeholders — reads named environment variables at template parse time (fail-closed: missing vars are an error).

Trait Implementations

impl Debug for EnvPlaceholderHandler

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

Formats the value using the given formatter.

impl PlaceholderHandler for EnvPlaceholderHandler

fn matches(&self, ph: &PlaceholderRef) -> bool

Returns true if this handler is responsible for the given placeholder.

fn resolve( &self, body: &Value, _ctx: &GeneratorContext, ) -> Result<HashMap<String, Arc<str>>, TemplateError>

Walks body, collects all matching placeholder names, and resolves them to pre-serialized JSON values. Called once at template parse time.

fn collect_names(&self, body: &Value) -> Vec<String>

Collects all placeholder names in body that this handler matches. Deduplicated and sorted for determinism.

fn walk(&self, value: &Value, names: &mut Vec<String>)

Recursively walks value, pushing matching placeholder names into names.