things

analysis/Cargo.toml

@@ -7,5 +7,6 @@ edition = "2021"
 
 [dependencies]
 bumpalo = "3.10.0"
+lasso = "0.6.0"
 parser = { path = "../parser" }
 rustc-hash = "1.1.0"

analysis/src/hir.rs

@@ -1,3 +1,10 @@
+use lasso::Spur;
+use parser::Spanned;
+
+pub type Symbol = Spur;
+
+pub type Ident = Spanned<Symbol>;
+
 pub struct Hir<'hir> {
     x: &'hir (),
 }

analysis/src/lower.rs

@@ -1,31 +1,46 @@
-use parser::{
-    ast::{self, Ident},
-    Span,
-};
+use parser::{ast, Span};
 use rustc_hash::FxHashMap;
 
-use crate::hir;
+use crate::hir::{self, Symbol};
 
 pub struct LowerCtx<'hir> {
+    hir_symbol_intern: lasso::Rodeo,
     hir_arena: &'hir bumpalo::Bump,
-    global_symbols: FxHashMap<Ident, &'hir hir::ExternalDecl>,
+    global_symbols: FxHashMap<Symbol, &'hir hir::ExternalDecl>,
 }
 
 impl<'hir> LowerCtx<'hir> {
     pub fn lower_translation_unit(&mut self, unit: &ast::TranslationUnit) -> hir::Hir<'hir> {
-        for decl in unit {}
+        for _decl in unit {}
 
         todo!()
     }
 
-    fn lower_decl(&mut self, decl: &ast::ExternalDecl, span: Span) -> hir::ExternalDecl {
+    fn lower_decl(&mut self, decl: &ast::ExternalDecl, _span: Span) -> hir::ExternalDecl {
         match decl {
             ast::ExternalDecl::Decl(_) => todo!(),
-            ast::ExternalDecl::FunctionDef(func) => todo!(),
+            ast::ExternalDecl::FunctionDef(_func) => todo!(),
         }
     }
 
-    fn lower_function_def(&mut self, def: &ast::FunctionDef, span: Span) -> hir::FunctionDef {
+    fn lower_function_def(&mut self, def: &ast::FunctionDef, _span: Span) -> hir::FunctionDef {
+        let decl = def.decl.uwnrap_normal();
+        let (init_declarator, _declarator_span) = decl
+            .init_declarators
+            .get(0)
+            .expect("single init declarator in function definition");
+        let declarator = &init_declarator.declarator;
+
+        let ((name_ident, _name_span), _param_decls) = declarator.decl.unwrap_with_params();
+
+        let name_sym = self.hir_symbol_intern.get_or_intern(name_ident);
+
+
+        if self.global_symbols.contains_key(&name_sym) {
+            panic!("function declarated twice! return this error properly! lol!")
+        }
+        
+
         todo!()
     }
 }