diff --git a/Cargo.lock b/Cargo.lock
index e883c78..18489ea 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,251 @@
# It is not intended for manual editing.
version = 4
+[[package]]
+name = "equivalent"
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+
[[package]]
name = "fortifier"
version = "0.0.1"
+dependencies = [
+ "fortifier-macros",
+]
+
+[[package]]
+name = "fortifier-macros"
+version = "0.0.1"
+dependencies = [
+ "fortifier",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "trybuild",
+]
+
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+
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+ "hashbrown",
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+dependencies = [
+ "windows-link",
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diff --git a/Cargo.toml b/Cargo.toml
index ed96ca4..1c70cfe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,3 +11,4 @@ version = "0.0.1"
[workspace.dependencies]
fortifier = { path = "./packages/fortifier", version = "0.0.1" }
+fortifier-macros = { path = "./packages/fortifier-macros", version = "0.0.1" }
diff --git a/deny.toml b/deny.toml
index 522d8d0..13550b0 100644
--- a/deny.toml
+++ b/deny.toml
@@ -10,7 +10,7 @@ multiple-versions = "allow"
wildcards = "deny"
[licenses]
-allow = ["MIT"]
+allow = ["MIT", "Unicode-3.0"]
confidence-threshold = 1.0
[sources]
diff --git a/packages/fortifier-macros/Cargo.toml b/packages/fortifier-macros/Cargo.toml
new file mode 100644
index 0000000..00b0eb8
--- /dev/null
+++ b/packages/fortifier-macros/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "fortifier-macros"
+description = "Macros for Fortifier."
+
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+version.workspace = true
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0.103"
+quote = "1.0.42"
+syn = "2.0.110"
+
+[dev-dependencies]
+fortifier.workspace = true
+trybuild = "1.0.114"
diff --git a/packages/fortifier-macros/README.md b/packages/fortifier-macros/README.md
new file mode 100644
index 0000000..06d3961
--- /dev/null
+++ b/packages/fortifier-macros/README.md
@@ -0,0 +1,13 @@
+Fortifier Macros
+
+Macros for Fortifier.
+
+## Documentation
+
+See [the Fortifier book](https://fortifier.rustforweb.org/) for documentation.
+
+## Rust for Web
+
+The Fortifier project is part of [Rust for Web](https://github.com/RustForWeb).
+
+[Rust for Web](https://github.com/RustForWeb) creates and ports web libraries for Rust. All projects are free and open source.
diff --git a/packages/fortifier-macros/src/derive.rs b/packages/fortifier-macros/src/derive.rs
new file mode 100644
index 0000000..645afdb
--- /dev/null
+++ b/packages/fortifier-macros/src/derive.rs
@@ -0,0 +1,47 @@
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote};
+use syn::{Data, DeriveInput, Fields};
+
+pub fn validate_tokens(input: DeriveInput) -> TokenStream {
+ match input.data {
+ Data::Struct(data_struct) => match data_struct.fields {
+ Fields::Named(_fields_named) => {
+ // TODO
+ }
+ Fields::Unnamed(_fields_unnamed) => todo!("fields unamed"),
+ Fields::Unit => todo!("fields unit"),
+ },
+ Data::Enum(_data_enum) => todo!("data enum"),
+ Data::Union(_data_union) => todo!("data union"),
+ }
+
+ let ident = input.ident;
+ let error_ident = format_ident!("{ident}ValidationError");
+
+ quote! {
+ #[derive(Debug)]
+ struct #error_ident {}
+
+ impl ::std::fmt::Display for #error_ident {
+ fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
+ write!(f, "")
+ }
+ }
+
+ impl ::std::error::Error for #error_ident {}
+
+ impl Validate for #ident {
+ type Error = #error_ident;
+
+ fn validate_sync(&self) -> Result<(), Self::Error> {
+ Ok(())
+ }
+
+ fn validate_async(&self) -> ::std::pin::Pin>>> {
+ Box::pin(async {
+ Ok(())
+ })
+ }
+ }
+ }
+}
diff --git a/packages/fortifier-macros/src/lib.rs b/packages/fortifier-macros/src/lib.rs
new file mode 100644
index 0000000..c80b31a
--- /dev/null
+++ b/packages/fortifier-macros/src/lib.rs
@@ -0,0 +1,13 @@
+mod derive;
+
+use proc_macro::TokenStream;
+use syn::{DeriveInput, parse_macro_input};
+
+use crate::derive::validate_tokens;
+
+#[proc_macro_derive(Validate, attributes(validate))]
+pub fn derive(input: TokenStream) -> TokenStream {
+ let input = parse_macro_input!(input as DeriveInput);
+
+ validate_tokens(input).into()
+}
diff --git a/packages/fortifier-macros/tests/derive.rs b/packages/fortifier-macros/tests/derive.rs
new file mode 100644
index 0000000..0838ef5
--- /dev/null
+++ b/packages/fortifier-macros/tests/derive.rs
@@ -0,0 +1,8 @@
+use trybuild::TestCases;
+
+#[test]
+fn derive() {
+ let t = TestCases::new();
+ t.pass("tests/derive/*_pass.rs");
+ t.compile_fail("tests/derive/*_fail.rs");
+}
diff --git a/packages/fortifier-macros/tests/derive/basic_pass.rs b/packages/fortifier-macros/tests/derive/basic_pass.rs
new file mode 100644
index 0000000..abe2f6d
--- /dev/null
+++ b/packages/fortifier-macros/tests/derive/basic_pass.rs
@@ -0,0 +1,23 @@
+use std::error::Error;
+
+use fortifier::Validate;
+
+#[derive(Validate)]
+struct CreateUser {
+ #[validate(email)]
+ email: String,
+
+ #[validate(length(min = 1, max = 256))]
+ name: String,
+}
+
+fn main() -> Result<(), Box> {
+ let data = CreateUser {
+ email: "john@doe.com".to_owned(),
+ name: "John Doe".to_owned(),
+ };
+
+ data.validate_sync()?;
+
+ Ok(())
+}
diff --git a/packages/fortifier/Cargo.toml b/packages/fortifier/Cargo.toml
index bbbc159..7ad814c 100644
--- a/packages/fortifier/Cargo.toml
+++ b/packages/fortifier/Cargo.toml
@@ -7,3 +7,10 @@ edition.workspace = true
license.workspace = true
repository.workspace = true
version.workspace = true
+
+[features]
+default = ["macros"]
+macros = ["dep:fortifier-macros"]
+
+[dependencies]
+fortifier-macros = { workspace = true, optional = true }
diff --git a/packages/fortifier/src/lib.rs b/packages/fortifier/src/lib.rs
index 8b13789..f1b88ef 100644
--- a/packages/fortifier/src/lib.rs
+++ b/packages/fortifier/src/lib.rs
@@ -1 +1,6 @@
+mod validate;
+pub use validate::*;
+
+#[cfg(feature = "macros")]
+pub use fortifier_macros::*;
diff --git a/packages/fortifier/src/validate.rs b/packages/fortifier/src/validate.rs
new file mode 100644
index 0000000..c6e528b
--- /dev/null
+++ b/packages/fortifier/src/validate.rs
@@ -0,0 +1,19 @@
+use std::{error::Error, pin::Pin};
+
+pub trait Validate {
+ type Error: Error;
+
+ fn validate(&self) -> Pin> + Send>>
+ where
+ Self: Sync,
+ {
+ Box::pin(async {
+ self.validate_sync()?;
+ self.validate_async().await
+ })
+ }
+
+ fn validate_sync(&self) -> Result<(), Self::Error>;
+
+ fn validate_async(&self) -> Pin> + Send>>;
+}