1 files changed, 83 insertions, 0 deletions
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..704b310
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,83 @@
+//! Template struct for storing template strings and their parameters.
+//!
+//! The template supports two types of parameters:
+//! - Simple parameters: key-value pairs used to replace simple placeholders (`<<<key>>>` format) in the template.
+//! - Implementation parameters: for implementation blocks (`>>>>>>>>> block_name` and `@@@ >>> block_name` format),
+//!   can contain multiple parameter sets, each corresponding to an implementation instance.
+//!
+//! # Examples
+//! ```
+//! use just_template::Template;
+//!
+//! let mut tmpl = Template::from("Hello, <<<name>>>!".to_string());
+//! tmpl.insert_param("name".to_string(), "World".to_string());
+//! assert_eq!(tmpl.to_string(), "Hello, World!");
+//! ```
+//!
+//! Using the `tmpl_param!` macro makes it easier to add simple parameters:
+//! ```
+//! use just_template::{Template, tmpl_param};
+//!
+//! let mut tmpl = Template::from("<<<a>>> + <<<b>>> = <<<c>>>".to_string());
+//! tmpl_param!(tmpl, a = 1, b = 2, c = 3);
+//! assert_eq!(tmpl.to_string(), "1 + 2 = 3");
+//! ```
+//!
+//! Using the `tmpl!` macro adds implementation block parameters:
+//! ```
+//! use just_template::{Template, tmpl};
+//!
+//! let mut tmpl = Template::from("
+//! >>>>>>>>>> arms
+//! @@@ >>> arms
+//!     <<<crate_name>>> => Some(<<<crate_name>>>::exec(data, params).await),
+//! @@@ <<<
+//! ".trim().to_string());
+//! tmpl!(tmpl += {
+//!     arms {
+//!         (crate_name = "my"),
+//!         (crate_name = "you")
+//!     }
+//! });
+//! // Output the expanded template
+//! let expanded = tmpl.to_string();
+//! assert_eq!(expanded, "
+//!     my => Some(my::exec(data, params).await),
+//!     you => Some(you::exec(data, params).await),
+//! ".trim().to_string());
+//! ```
+mod template;
+pub use template::*; // Re-export template to just_template
+
+pub mod expand;
+pub mod test;
+
+#[macro_export]
+macro_rules! tmpl_param {
+    ($template:ident, $($key:ident = $value:expr),* $(,)?) => {{
+        $(
+            $template.insert_param(stringify!($key).to_string(), $value.to_string());
+        )*
+    }};
+}
+
+#[macro_export]
+macro_rules! tmpl {
+    ($template:ident += {
+        $($name:ident {
+            $(($($key:ident = $value:expr),* $(,)?)),*
+            $(,)?
+        }),*
+    }) => {{
+        $(
+            let $name = $template.add_impl(stringify!($name).to_string());
+            $(
+                $name.push({
+                    let mut params = std::collections::HashMap::new();
+                    $(params.insert(stringify!($key).to_string(), $value.to_string());)*
+                    params
+                });
+            )*
+        )*
+    }};
+}