Struct Template 

pub struct Template { /* private fields */ }

A simple template engine for prompt templates.

Templates use {{VARIABLE}} syntax for placeholders and {{> partial}} for including shared templates. Variables are replaced with the provided values. Comments using {# comment #} syntax are stripped.

Example

let partials = HashMap::from([("header", "Common Header\n")]);
let template = Template::new("{{> header}}\nReview this diff:\n{{DIFF}}");
let variables = HashMap::from([("DIFF", "+ new line")]);
let rendered = template.render_with_partials(&variables, &partials)?;

Implementations

impl Template

pub fn new(content: &str) -> Self

Create a template from a string.

Comments ({# ... #}) are stripped during creation. All features are enabled by default: variables, conditionals, loops, and defaults.

impl Template

pub fn render( &self, variables: &HashMap<&str, String>, ) -> Result<String, TemplateError>

Render the template with the provided variables.

pub fn render_with_partials( &self, variables: &HashMap<&str, String>, partials: &HashMap<String, String>, ) -> Result<String, TemplateError>

Render the template with variables and partials support.

Partials are processed recursively, with the same variables passed to each partial. Circular references are detected and reported with a clear error.

pub fn render_with_log( &self, template_name: &str, variables: &HashMap<&str, String>, partials: &HashMap<String, String>, ) -> Result<RenderedTemplate, TemplateError>

Render the template with variables and partials, returning substitution log.

This is the primary method for reducer-integrated rendering. It returns both the rendered content and a detailed log of all substitutions, enabling validation based on what was actually substituted rather than regex scanning.

Trait Implementations

impl Clone for Template

fn clone(&self) -> Template

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Template

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

Formats the value using the given formatter.