Refactor macro handling: add pascal_to_snake utility, rewrite Target handling, and update descriptor structure for bits-based targets.

Cargo.toml

@@ -15,6 +15,7 @@ authors = ["Dean J. Karstedt <dk@cl.team>"]
 license-file = "LICENSE"
 
 [dependencies]
+pmp-macro   = { path = "crates/pmp-macro" }
 pmp-emitter = { path = "crates/pmp-emitter" }
 
 clap = { version = "^4", features = ["derive"] }

crates/pmp-core/src/functions.rs

@@ -24,3 +24,26 @@ pub fn snake_to_title(s: &str) -> String
         .collect::<Vec<_>>()
         .join(" ")
 }
+
+pub fn pascal_to_snake(s: &str) -> String
+{
+    let mut out = String::with_capacity(s.len());
+    let mut prev_lower = false;
+
+    for c in s.chars()
+    {
+        if c.is_uppercase()
+        {
+            if prev_lower              { out.push('_'); }
+            for lc in c.to_lowercase() { out.push(lc); }
+            prev_lower = false;
+        }
+        else
+        {
+            prev_lower = true;
+            out.push(c);
+        }
+    }
+
+    out
+}

crates/pmp-macro/crates/pmp-macro-core/src/expand.rs

@@ -3,6 +3,22 @@ use proc_macro2::TokenStream as TokenStream2;
 
 use crate::attrs::MacroInput;
 
+fn rewrite_bitor_target_expr(expr: syn::Expr) -> syn::Expr
+{
+    match expr
+    {
+        syn::Expr::Binary(mut bin) if matches!(bin.op, syn::BinOp::BitOr(_)) => {
+            bin.left  = Box::new(rewrite_bitor_target_expr(*bin.left));
+            bin.right = Box::new(rewrite_bitor_target_expr(*bin.right));
+            syn::Expr::Binary(bin)
+        }
+
+        other => {
+            syn::parse_quote! { (#other).bits() }
+        }
+    }
+}
+
 pub fn expand(parsed: MacroInput) -> syn::Result<TokenStream2>
 {
     let struct_ident = &parsed.ident;
@@ -16,8 +32,8 @@ pub fn expand(parsed: MacroInput) -> syn::Result<TokenStream2>
         .unwrap_or_else(|| struct_ident.to_string());
 
     let target_expr: syn::Expr = parsed.target
-        .map(|e| e.0)
+        .map(|e| rewrite_bitor_target_expr(e.0))
-        .unwrap_or_else(|| syn::parse_quote! { ::pmp_macro_misc::Target::ALL });
+        .unwrap_or_else(|| syn::parse_quote! { ::pmp_macro::Target::ALL.bits() });
 
     let docs: String = parsed.docs.map(|s| s.0).unwrap_or_default();
 
@@ -53,7 +69,7 @@ pub fn expand(parsed: MacroInput) -> syn::Result<TokenStream2>
         };
 
         param_tokens.push(quote_spanned! { span =>
-            ::pmp_macro_misc::ParamDescriptor {
+            ::pmp_macro::ParamDescriptor {
                 name:     #field_name,
                 php_type: #php_type,
                 required: #required,
@@ -64,47 +80,48 @@ pub fn expand(parsed: MacroInput) -> syn::Result<TokenStream2>
 
     if let Some(e) = errors { return Err(e); }
 
-    let mod_ident  = format_ident!("__pmp_macro_impl_{}", struct_ident);
+    let snaked_ident = pmp_core::pascal_to_snake(struct_ident.to_string().as_str());
-    let handler    = quote! { super::#struct_ident };
+    let mod_ident    = format_ident!("__pmp_macro_impl_{}", snaked_ident);
+    let handler      = quote! { super::#struct_ident };
 
     Ok(quote!
     {
         #[doc(hidden)]
         mod #mod_ident
         {
-            use ::pmp_macro_misc::{
+            use ::pmp_macro::{
-                AnalyzeFn, MacroDescriptor, MacroRegistration, ParamDescriptor,
+                 AnalyzeFn, MacroDescriptor, MacroRegistration,
-                TransformFn, PmpMacro,
+                 ParamDescriptor, Target, TransformFn, PmpMacro,
             };
 
             static PARAMS: &[ParamDescriptor] = &[ #(#param_tokens),* ];
 
             static DESCRIPTOR: MacroDescriptor = MacroDescriptor {
-                name:   #attr_name,
+                name:        #attr_name,
-                target: #target_expr,
+                target_bits: #target_expr,
-                docs:   #docs,
+                docs:        #docs,
-                params: PARAMS,
+                params:      PARAMS,
             };
 
             fn analyze(
-                ctx:  &::pmp_macro_misc::MacroContext,
+                ctx:  &::pmp_macro::MacroContext,
-                attr: &::pmp_macro_misc::ResolvedAttr,
+                attr: &::pmp_macro::ResolvedAttr,
-                node: &::pmp_macro_misc::AttributedNode,
+                node: &::pmp_macro::AttributedNode,
-            ) -> ::std::vec::Vec<::pmp_macro_misc::Diagnostic>
+            ) -> ::std::vec::Vec<::pmp_macro::Diagnostic>
             {
                 <#handler as PmpMacro>::analyze(&::std::default::Default::default(), ctx, attr, node)
             }
 
             fn transform(
-                ctx:  &::pmp_macro_misc::MacroContext,
+                ctx:  &::pmp_macro::MacroContext,
-                attr: &::pmp_macro_misc::ResolvedAttr,
+                attr: &::pmp_macro::ResolvedAttr,
-                node: &::pmp_macro_misc::AttributedNode,
+                node: &::pmp_macro::AttributedNode,
-            ) -> ::std::vec::Vec<::pmp_macro_misc::Rewrite>
+            ) -> ::std::vec::Vec<::pmp_macro::Rewrite>
             {
                 <#handler as PmpMacro>::transform(&::std::default::Default::default(), ctx, attr, node)
             }
 
-            ::inventory::submit! {
+            ::pmp_macro::inventory::submit! {
                 MacroRegistration::new(&DESCRIPTOR, analyze, transform)
             }
         }

crates/pmp-macro/crates/pmp-macro-misc/src/descriptor.rs

@@ -1,36 +1,26 @@
 use crate::target::Target;
 
-/// Describes a single constructor parameter of a PHP macro attribute.
-///
-/// All fields are `&'static str` so the descriptor can be embedded as a
-/// `static` and referenced from the inventory without allocation.
 #[derive(Debug, Clone, Copy)]
 pub struct ParamDescriptor {
-    /// The parameter name as it appears in the PHP constructor.
     pub name:     &'static str,
-    /// A human-readable PHP type hint, e.g. `"class-string[]"` or `"bool"`.
     pub php_type: &'static str,
-    /// Whether the parameter must be supplied by the caller.
     pub required: bool,
-    /// The PHP source representation of the default value, e.g. `"[]"` or `"false"`.
-    /// `None` when `required` is `true`.
     pub default:  Option<&'static str>,
 }
 
-/// Static metadata for a registered PHP macro attribute.
-///
-/// Generated by `#[derive(PmpMacro)]` and stored as a `&'static MacroDescriptor`
-/// in the inventory. Entirely allocation-free.
 #[derive(Debug)]
 pub struct MacroDescriptor {
-    /// The PHP attribute name, e.g. `"Sealed"`. Used to match against
+    pub name:        &'static str,
-    /// attribute usages in parsed PHP files.
+    /// Raw bitflags value - use `.target()` to get a `Target`.
-    pub name:   &'static str,
+    /// Stored as `u16` so the static initializer remains `const`.
-    /// Which PHP constructs this attribute is permitted to annotate.
+    pub target_bits: u16,
-    pub target: Target,
+    pub docs:        &'static str,
-    /// Human-readable description of what this macro does.
+    pub params:      &'static [ParamDescriptor],
-    /// Used for error messages and generated documentation.
+}
-    pub docs:   &'static str,
+
-    /// The constructor parameters this attribute accepts.
+impl MacroDescriptor
-    pub params: &'static [ParamDescriptor],
+{
+    pub fn target(&self) -> Target {
+        Target::from_bits_truncate(self.target_bits)
+    }
 }

crates/pmp-macro/crates/pmp-macro-misc/src/lib.rs

@@ -14,7 +14,10 @@ mod traits;
 mod context;
 mod descriptor;
 
-pub use target::Target;
+#[doc(hidden)]
-pub use descriptor::{ MacroDescriptor, ParamDescriptor };
+pub use inventory;
-pub use traits::{ PmpMacro, MacroRegistry, MacroRegistration, };
+
-pub use context::{ Rewrite, ResolvedAttr, Diagnostic, MacroContext, AttributedNode };
+pub use target::*;
+pub use traits::*;
+pub use context::*;
+pub use descriptor::*;