make multiple blocks in one file work

src/frontend.rs

@@ -43,22 +43,9 @@ impl CompileError {
     }
 }
 
-/// A user-defined signal
-pub struct Signal {
-    /// the user-visible name of the signal
-    pub name: String,
-    /// the id of the signal in RTLIL
-    pub il_id: String,
-    /// the type of the signal
-    pub typ: Type,
-    // unique ID of the signal
-    // pub uid: u64,
-}
-
-impl Signal {
-    fn sigspec(&self) -> rtlil::SigSpec {
-        rtlil::SigSpec::Wire(self.il_id.to_owned())
-    }
+#[derive(Debug)]
+pub struct Module {
+    pub blocks: Vec<typed_ir::Block>,
 }
 
 pub struct Context {
@@ -227,20 +214,20 @@ impl Context {
         Ok(t_expr)
     }
 
-    fn type_comb(
+    fn callable_from_block(
         &mut self,
         comb: &parser::comb::CombBlock,
-    ) -> Result<typed_ir::Block, CompileError> {
-        let mut signals = Vec::new();
-
+    ) -> Result<CallableId, CompileError> {
+        let mut genargs = vec![];
         for (idx, tvarname) in comb.genparams.iter().enumerate() {
             let tvar = self.types.make_typevar(0, idx as u32);
+            // hacky workaround for no scopes
             self.typenames.insert(tvarname.name.to_string(), tvar);
+            genargs.push((Some(tvarname.name.to_string()), tvar));
         }
 
+        let mut args = vec![];
         for port in comb.ports.iter() {
-            let sig_id = self.ids.next();
-
             let sig_typename = &port.net.typ;
             let mut sig_type = self.try_get_type(sig_typename.name.fragment())?;
             if let Some(arg) = &sig_typename.generics {
@@ -252,38 +239,73 @@ impl Context {
                     .unwrap();
             }
 
-            let sig = typed_ir::Signal {
-                id: typed_ir::DefId(sig_id as u32),
-                typ: sig_type,
-            };
-            signals.push(sig.clone());
-            self.signals.insert(port.net.name.to_string(), sig);
+            args.push((Some(port.net.name.to_string()), sig_type));
         }
 
         let ret_typename = &comb.ret.name;
-        let _ret_type = self.try_get_type(ret_typename.fragment())?;
-        // TODO: use ret type
+        let ret_type = self.try_get_type(ret_typename.fragment())?;
+
+        let signature = Callable {
+            name: comb.name.to_string(),
+            args,
+            genargs,
+            ret_type,
+        };
+        let signature_id = self.callables.add(signature);
+        self.callable_names
+            .insert(comb.name.to_string(), signature_id);
+        Ok(signature_id)
+    }
+
+    fn type_comb(
+        &mut self,
+        comb: &parser::comb::CombBlock,
+    ) -> Result<typed_ir::Block, CompileError> {
+        let mut signals = Vec::new();
+
+        let callable_id = self.callable_from_block(comb)?;
+        let callable = self.callables.get(callable_id);
+
+        for (argname, typ) in &callable.args {
+            let sig_id = self.ids.next();
+            let sig = typed_ir::Signal {
+                id: typed_ir::DefId(sig_id as u32),
+                typ: *typ,
+            };
+            signals.push(sig.clone());
+            if let Some(argname) = argname {
+                self.signals.insert(argname.clone(), sig);
+            }
+        }
 
         let root_expr = self.type_expression(&comb.expr)?;
 
         Ok(typed_ir::Block {
+            signature: callable_id,
             signals,
             expr: root_expr,
         })
     }
 
-    pub fn type_module(&mut self, module: parser::Module) -> Result<typed_ir::Block, CompileError> {
+    pub fn type_module(&mut self, module: parser::Module) -> Result<Module, CompileError> {
+        let mut typed_module = Module { blocks: vec![] };
+        // hacky loop to predefine all names
+        for item in &module.items {
+            match &item {
+                parser::ModuleItem::Comb(comb) => self.callable_from_block(comb)?,
+                parser::ModuleItem::Proc(_) => todo!("proc block"),
+                parser::ModuleItem::State(_) => todo!("state block"),
+            };
+        }
         for item in module.items {
             let block = match &item {
                 parser::ModuleItem::Comb(comb) => self.type_comb(comb)?,
                 parser::ModuleItem::Proc(_) => todo!("proc block"),
                 parser::ModuleItem::State(_) => todo!("state block"),
             };
-            return Ok(block);
+            typed_module.blocks.push(block);
         }
-        Err(CompileError::new(CompileErrorKind::TodoError(
-            "no blocks in module".to_string(),
-        )))
+        Ok(typed_module)
     }
 
     pub fn infer_expr_types(&mut self, expr: &typed_ir::Expr) -> typed_ir::Expr {
@@ -357,6 +379,35 @@ impl Context {
         w: &mut dyn std::fmt::Write,
         block: &typed_ir::Block,
     ) -> std::fmt::Result {
+        let callsig = self.callables.get(block.signature);
+        {
+            // TODO: ugly copy paste job
+            let args = callsig
+                .args
+                .iter()
+                .map(|(name, typ)| {
+                    let mut out = String::new();
+                    self.types.pretty_type(&mut out, *typ)?;
+                    Ok(out)
+                })
+                .collect::<Result<Vec<String>, std::fmt::Error>>()?;
+            let genargs = callsig
+                .genargs
+                .iter()
+                .map(|(name, typ)| {
+                    let mut type_str = String::new();
+                    self.types.pretty_type(&mut type_str, *typ)?;
+                    Ok(type_str)
+                })
+                .collect::<Result<Vec<String>, std::fmt::Error>>()?;
+            writeln!(
+                w,
+                "block {}<{}>({})",
+                callsig.name(),
+                genargs.join(", "),
+                args.join(", ")
+            )?;
+        }
         for sig in &block.signals {
             let mut typ_pretty = String::new();
             self.types.pretty_type(&mut typ_pretty, sig.typ)?;

src/frontend/callable.rs

@@ -3,6 +3,7 @@ use super::types::{Type, TypingContext};
 #[derive(Debug, Copy, Clone, PartialOrd, PartialEq, Eq, Ord)]
 pub struct CallableId(pub usize);
 
+#[derive(Debug)]
 pub struct Callable {
     pub name: String,
     pub args: Vec<(Option<String>, Type)>,

src/frontend/typed_ir.rs

@@ -48,6 +48,7 @@ pub struct Signal {
 /// A block of HDL code, e.g. comb block
 #[derive(Debug, Clone)]
 pub struct Block {
+    pub signature: CallableId,
     pub signals: Vec<Signal>,
     pub expr: Expr,
 }

src/main.rs

@@ -60,7 +60,8 @@ fn main() {
             }
             let mut frontendcontext = crate::frontend::Context::new();
             let typed = frontendcontext.type_module(res.1);
-            if let Ok(block) = typed {
+            if let Ok(module) = typed {
+                for block in module.blocks {
                     if opt.debug {
                         let mut pretty_block = String::new();
                         frontendcontext
@@ -76,6 +77,9 @@ fn main() {
                             .unwrap();
                         println!("{}", &pretty_block);
                     }
+                }
+                // TODO: be able to determine modules that are fully parameterized
+                /*
                 let lowered = frontend::lowering::lower_block(&mut frontendcontext, typed_inferred);
                 match lowered {
                     Ok(res) => {
@@ -87,6 +91,9 @@ fn main() {
                     }
                     Err(err) => eprintln!("{:#?}", err),
                 }
+                */
+            } else {
+                eprintln!("{:#?}", typed);
             }
         }
     }