Add derive for leaf enum spec, fix compilation errors.

ast-generator/src/ast_node/enum_ast_node.rs

@@ -1,6 +1,50 @@
-use crate::spec::tree_enum_spec::TreeEnumBuildSpec;
+use convert_case::{Case, Casing};
+use crate::spec::tree_enum_spec::{EnumRuleChildKind, TreeEnumBuildSpec};
 use proc_macro2::TokenStream;
+use quote::{format_ident, quote};
 
 pub fn make_enum_ast_node_impl(enum_spec: &TreeEnumBuildSpec) -> TokenStream {
-    todo!()
+    let type_ident = format_ident!("{}", enum_spec.build());
+    let match_arms = enum_spec
+        .rules()
+        .map(|rule| {
+            let rule_ident = format_ident!("{}", rule.rule());
+            match rule.child() {
+                Some(child) => {
+                    match child.kind() {
+                        EnumRuleChildKind::Node(node_child) => {
+                            let child_ident = format_ident!("{}", node_child.node_kind().to_case(Case::Snake));
+                            quote! {
+                                #type_ident::#rule_ident(#child_ident) => vec![
+                                    #child_ident.as_node_ref()
+                                ]
+                            }
+                        }
+                        _ => quote! {
+                            #type_ident::#rule_ident(_) => vec![]
+                        }
+                    }
+                },
+                None => {
+                    quote! {
+                        #type_ident::#rule_ident => vec![]
+                    }
+                }
+            }
+        })
+        .collect::<Vec<_>>();
+    
+    quote! {
+        impl AstNode for #type_ident {
+            fn children(&self) -> Vec<AstNodeRef> {
+                match self {
+                    #(#match_arms,)*
+                }
+            }
+
+            fn as_node_ref(&self) -> AstNodeRef {
+                AstNodeRef::#type_ident(&self)
+            }
+        }
+    }
 }

ast-generator/src/ast_node/leaf_enum_ast_node.rs

@@ -1,6 +1,18 @@
 use proc_macro2::TokenStream;
+use quote::{format_ident, quote};
 use crate::spec::leaf_enum_spec::LeafEnumBuildSpec;
 
 pub fn make_leaf_enum_ast_node_impl(spec: &LeafEnumBuildSpec) -> TokenStream {
-    todo!()
+    let type_ident = format_ident!("{}", spec.build());
+    quote! {
+        impl AstNode for #type_ident {
+            fn children(&self) -> Vec<AstNodeRef> {
+                vec![]
+            }
+            
+            fn as_node_ref(&self) -> AstNodeRef {
+                AstNodeRef::#type_ident(&self)
+            }
+        }
+    }
 }

ast-generator/src/ast_node/leaf_struct_ast_node.rs

@@ -1,6 +1,18 @@
-use proc_macro2::TokenStream;
 use crate::spec::leaf_struct_spec::LeafStructBuildSpec;
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote};
 
 pub fn make_leaf_struct_ast_node_impl(spec: &LeafStructBuildSpec) -> TokenStream {
-    todo!()
-}
+    let type_ident = format_ident!("{}", spec.build());
+    quote! {
+        impl AstNode for #type_ident {
+            fn children(&self) -> Vec<AstNodeRef> {
+                vec![]
+            }
+            
+            fn as_node_ref(&self) -> AstNodeRef {
+                AstNodeRef::#type_ident(&self)
+            }
+        }
+    }
+}

ast-generator/src/ast_node/mod.rs

@@ -41,12 +41,33 @@ pub fn make_ast_node_impl(build_spec: &BuildSpec) -> Option<TokenStream> {
     }
 }
 
-pub fn make_ast_enum_member(build_spec: &BuildSpec) -> Option<TokenStream> {
+pub fn make_ast_enum_member(build_spec: &BuildSpec) -> Option<TokenStream> { 
     match build_spec {
         BuildSpec::Struct(struct_spec) => {
-            let type_ident = format_ident!("{}", struct_spec.build());
-            Some(quote! { #type_ident(#type_ident) })
+            Some(format_ident!("{}", struct_spec.build()))
         }
-        _ => None,
+        BuildSpec::LeafStruct(leaf_struct) => {
+            Some(format_ident!("{}", leaf_struct.build()))
+        }
+        BuildSpec::Enum(enum_spec) => {
+            Some(format_ident!("{}", enum_spec.build()))
+        }
+        BuildSpec::LeafEnum(leaf_enum) => {
+            Some(format_ident!("{}", leaf_enum.build()))
+        }
+        BuildSpec::PolymorphicType(polymorphic_type) => {
+            Some(format_ident!("{}", polymorphic_type.name()))
+        },
+        BuildSpec::PolymorphicEnumLoop(polymorphic_enum_loop) => {
+            Some(format_ident!("{}", polymorphic_enum_loop.name()))
+        }
+        BuildSpec::PolymorphicPassThrough(_) => None,
+        BuildSpec::Production(_) => None,
+        BuildSpec::NodeProduction(_) => None,
     }
+        .map(|type_ident| {
+            quote! {
+                #type_ident(&'a #type_ident)
+            }
+        })
 }

ast-generator/src/ast_node/polymorphic_enum_loop_ast_node.rs

@@ -1,6 +1,49 @@
+use crate::spec::polymorphic_enum_loop_spec::{
+    PolymorphicEnumLoopBuildSpec, PolymorphicEnumLoopRule, PolymorphicEnumLoopRuleBuildChild,
+};
 use proc_macro2::TokenStream;
-use crate::spec::polymorphic_enum_loop_spec::PolymorphicEnumLoopBuildSpec;
+use quote::{format_ident, quote};
 
-pub fn make_polymorphic_enum_loop_ast_node_impl(spec: &PolymorphicEnumLoopBuildSpec) -> TokenStream {
-    todo!()
-}
+pub fn make_polymorphic_enum_loop_ast_node_impl(
+    spec: &PolymorphicEnumLoopBuildSpec,
+) -> TokenStream {
+    let type_ident = format_ident!("{}", spec.name());
+    let build_rule = spec
+        .rules()
+        .filter_map(|rule| match rule {
+            PolymorphicEnumLoopRule::PassThrough(_) => None,
+            PolymorphicEnumLoopRule::Build(build_rule) => Some(build_rule),
+        })
+        .next()
+        .unwrap();
+    let child_adders = build_rule
+        .children()
+        .map(|child| {
+            let child_ident = match child {
+                PolymorphicEnumLoopRuleBuildChild::UseCurrent(use_current) => {
+                    format_ident!("{}", use_current.name())
+                }
+                PolymorphicEnumLoopRuleBuildChild::OnEach(on_each) => {
+                    format_ident!("{}", on_each.name())
+                }
+            };
+            quote! {
+                children.push(self.#child_ident().as_node_ref())
+            }
+        })
+        .collect::<Vec<_>>();
+
+    quote! {
+        impl AstNode for #type_ident {
+            fn children(&self) -> Vec<AstNodeRef> {
+                let mut children: Vec<AstNodeRef> = vec![];
+                #(#child_adders;)*
+                children
+            }
+
+            fn as_node_ref(&self) -> AstNodeRef {
+                AstNodeRef::#type_ident(&self)
+            }
+        }
+    }
+}

ast-generator/src/ast_node/polymorphic_type_ast_node.rs

@@ -1,6 +1,32 @@
-use proc_macro2::TokenStream;
 use crate::spec::polymorphic_type_spec::PolymorphicTypeBuildSpec;
+use convert_case::{Case, Casing};
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote};
 
 pub fn make_polymorphic_type_ast_node_impl(spec: &PolymorphicTypeBuildSpec) -> TokenStream {
-    todo!()
-}
+    let type_ident = format_ident!("{}", spec.name());
+    let match_arms = spec
+        .variants()
+        .map(|variant| {
+            let variant_ident = format_ident!("{}", variant.name());
+            let child_ident = format_ident!("{}", variant.inner_kind().to_case(Case::Snake));
+            quote! {
+                #type_ident::#variant_ident(#child_ident) => vec![#child_ident.as_node_ref()]
+            }
+        })
+        .collect::<Vec<_>>();
+
+    quote! {
+        impl AstNode for #type_ident {
+            fn children(&self) -> Vec<AstNodeRef> {
+                match self {
+                    #(#match_arms,)*
+                }
+            }
+
+            fn as_node_ref(&self) -> AstNodeRef {
+                AstNodeRef::#type_ident(&self)
+            }
+        }
+    }
+}

ast-generator/src/ast_node/struct_ast_node.rs

@@ -8,41 +8,44 @@ pub fn make_struct_ast_node_impl(spec: &StructSpec) -> TokenStream {
         .children()
         .map(|child| match child {
             StructChild::SkipChild(_) => None,
-            StructChild::VecChild(vec_child) => {
-                match vec_child.build() {
-                    VecChildBuild::String(_) => None,
-                    VecChildBuild::Node(_) => {
-                        let child_ident = format_ident!("{}", vec_child.name());
-                        let children_stream = quote! {
-                            for child in self.#child_ident().map(AstNode::as_node_ref).collect() {
-                                children.push(child);
+            StructChild::VecChild(vec_child) => match vec_child.build() {
+                VecChildBuild::String(_) => None,
+                VecChildBuild::Node(_) => {
+                    let child_ident = format_ident!("{}", vec_child.name());
+                    let children_stream = quote! {
+                        for child in self.#child_ident().map(AstNode::as_node_ref) {
+                            children.push(child);
+                        }
+                    };
+                    Some(children_stream)
+                }
+            },
+            StructChild::MemberChild(member_child) => match member_child.build() {
+                MemberChildBuild::Node(_) => {
+                    let child_ident = format_ident!("{}", member_child.name());
+                    if member_child.optional() {
+                        Some(quote! {
+                            if let Some(#child_ident) = self.#child_ident() {
+                                children.push(#child_ident.as_node_ref());
                             }
-                        };
-                        Some(children_stream)
+                        })
+                    } else {
+                        Some(quote! {
+                            children.push(self.#child_ident().as_node_ref())
+                        })
                     }
                 }
-            }
-            StructChild::MemberChild(member_child) => {
-                match member_child.build() {
-                    MemberChildBuild::Node(_) => {
-                        let child_ident = format_ident!("{}", member_child.name());
-                        let child_stream = quote! {
-                            children.add(self.#child_ident().as_node_ref())
-                        };
-                        Some(child_stream)
-                    }
-                    MemberChildBuild::Boolean(_) => None
-                }
-            }
+                MemberChildBuild::Boolean(_) => None,
+            },
         })
         .filter(Option::is_some)
         .map(Option::unwrap)
         .collect::<Vec<_>>();
-    
+
     quote! {
         impl AstNode for #type_ident {
             fn children(&self) -> Vec<AstNodeRef> {
-                let children: Vec<AstNodeRef> = vec![];
+                let mut children: Vec<AstNodeRef> = vec![];
                 #(#child_adders;)*
                 children
             }

ast-generator/src/deserialize/leaf_struct_spec.rs

@@ -23,5 +23,15 @@ pub fn deserialize_leaf_struct(name: &str, props: &Yaml) -> LeafStructBuildSpec
         })
         .map(Box::new)
         .collect();
-    LeafStructBuildSpec::new(name, members)
+    let derive = props["derive"]
+        .as_vec()
+        .map(|derive_yaml| {
+            derive_yaml.iter()
+                .map(|trait_yaml| { 
+                    trait_yaml.as_str().unwrap().to_string() 
+                }).collect::<Vec<_>>()
+        })
+        .unwrap_or_default();
+    
+    LeafStructBuildSpec::new(name, members, derive)
 }

ast-generator/src/lib.rs

@@ -4,12 +4,14 @@ mod deserialize;
 mod pretty_print;
 mod spec;
 mod type_gen;
+mod walk;
 
 use crate::ast_node::{make_ast_enum_member, make_ast_node_impl};
 use crate::build_fn::make_build_fn;
 use crate::deserialize::deserialize_yaml_spec;
 use crate::pretty_print::make_pretty_print_impl;
 use crate::type_gen::make_type;
+use crate::walk::make_walk_fn;
 use proc_macro2::TokenStream;
 use quote::quote;
 use spec::BuildSpec;
@@ -166,7 +168,7 @@ fn generate_ast_node_file(build_specs: &[BuildSpec]) -> AstGeneratedFile {
     let combined = quote! {
         use crate::ast::node::*;
 
-        pub enum AstNodeRef {
+        pub enum AstNodeRef<'a> {
             #(#ast_enum_members,)*
         }
 
@@ -184,6 +186,14 @@ fn generate_ast_node_file(build_specs: &[BuildSpec]) -> AstGeneratedFile {
     }
 }
 
+fn generate_walk_file(build_specs: &[BuildSpec]) -> AstGeneratedFile {
+    let stream = make_walk_fn(build_specs);
+    AstGeneratedFile {
+        name: String::from("walk.rs"),
+        contents: token_stream_to_string(stream),
+    }
+}
+
 pub fn get_build_specs(yaml: &str) -> Vec<BuildSpec> {
     deserialize_yaml_spec(yaml)
 }
@@ -194,5 +204,6 @@ pub fn generate_files(build_specs: &[BuildSpec]) -> Vec<AstGeneratedFile> {
         generate_node_file(build_specs),
         generate_pretty_print_file(build_specs),
         generate_ast_node_file(build_specs),
+        generate_walk_file(build_specs),
     ]
 }

ast-generator/src/spec/leaf_struct_spec.rs

@@ -1,13 +1,15 @@
 pub struct LeafStructBuildSpec {
     build: String,
     members: Vec<Box<LeafStructMember>>,
+    derive: Vec<String>,
 }
 
 impl LeafStructBuildSpec {
-    pub fn new(build: &str, members: Vec<Box<LeafStructMember>>) -> Self {
+    pub fn new(build: &str, members: Vec<Box<LeafStructMember>>, derive: Vec<String>) -> Self {
         Self {
             build: build.to_string(),
             members,
+            derive,
         }
     }
 
@@ -18,6 +20,10 @@ impl LeafStructBuildSpec {
     pub fn members(&self) -> impl Iterator<Item = &LeafStructMember> {
         self.members.iter().map(Box::as_ref)
     }
+    
+    pub fn derive(&self) -> impl Iterator<Item = &str> {
+        self.derive.iter().map(String::as_str)
+    }
 }
 
 pub struct LeafStructMember {

ast-generator/src/type_gen/leaf_struct_type.rs

@@ -83,10 +83,27 @@ pub fn make_leaf_struct_type(build_spec: &LeafStructBuildSpec) -> TokenStream {
         })
         .collect::<Vec<_>>();
 
-    quote! {
-        pub struct #type_ident {
-            #(#annotated_members),*
+    let struct_stream = if build_spec.derive().count() > 0 {
+        let derives = build_spec.derive().map(|derive| {
+            format_ident!("{}", derive)
+        }).collect::<Vec<_>>();
+        
+        quote! {
+            #[derive(#(#derives),*)]
+            pub struct #type_ident {
+                #(#annotated_members),*
+            }
         }
+    } else {
+        quote! {
+            pub struct #type_ident {
+                #(#annotated_members),*
+            }
+        }
+    };
+    
+    quote! {
+        #struct_stream
 
         impl #type_ident {
             pub fn new(#(#member_args),*) -> Self {

ast-generator/src/walk.rs

@@ -0,0 +1,61 @@
+use crate::spec::BuildSpec;
+use convert_case::{Case, Casing};
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote};
+
+pub fn make_walk_fn(specs: &[BuildSpec]) -> TokenStream {
+    let child_match_arms = specs
+        .iter()
+        .map(|spec| match spec {
+            BuildSpec::Enum(enum_spec) => Some((
+                format_ident!("{}", enum_spec.build()),
+                format_ident!("{}", enum_spec.build().to_case(Case::Snake)),
+            )),
+            BuildSpec::LeafEnum(leaf_enum) => Some((
+                format_ident!("{}", leaf_enum.build()),
+                format_ident!("{}", leaf_enum.build().to_case(Case::Snake)),
+            )),
+            BuildSpec::Struct(struct_spec) => Some((
+                format_ident!("{}", struct_spec.build()),
+                format_ident!("{}", struct_spec.build().to_case(Case::Snake)),
+            )),
+            BuildSpec::LeafStruct(leaf_struct) => Some((
+                format_ident!("{}", leaf_struct.build()),
+                format_ident!("{}", leaf_struct.build().to_case(Case::Snake)),
+            )),
+            BuildSpec::Production(_) => None,
+            BuildSpec::NodeProduction(_) => None,
+            BuildSpec::PolymorphicType(polymorphic_type) => Some((
+                format_ident!("{}", polymorphic_type.name()),
+                format_ident!("{}", polymorphic_type.name().to_case(Case::Snake)),
+            )),
+            BuildSpec::PolymorphicEnumLoop(polymorphic_enum_loop) => Some((
+                format_ident!("{}", polymorphic_enum_loop.name()),
+                format_ident!("{}", polymorphic_enum_loop.name().to_case(Case::Snake)),
+            )),
+            BuildSpec::PolymorphicPassThrough(_) => None,
+        })
+        .filter(Option::is_some)
+        .map(Option::unwrap)
+        .map(|(type_ident, inner_ident)| {
+            quote! {
+                #type_ident(#inner_ident) => walk_depth_first(#inner_ident, f)
+            }
+        })
+        .collect::<Vec<_>>();
+
+    quote! {
+        use crate::ast::node::*;
+        use crate::ast::ast_node::*;
+
+        pub fn walk_depth_first(node: &impl AstNode, f: &mut impl FnMut(AstNodeRef)) {
+            use AstNodeRef::*;
+            for child in node.children() {
+                match child {
+                    #(#child_match_arms,)*
+                }
+            }
+            f(node.as_node_ref());
+        }
+    }
+}

src/ast/mod.rs

@@ -161,3 +161,7 @@ pub mod ast_node {
         }
     }
 }
+
+pub mod walk {
+    include!(concat!(env!("OUT_DIR"), "/src/ast/walk.rs"));
+}

src/bin/dmc/name_analysis.rs

@@ -32,7 +32,7 @@ pub fn name_analysis(paths: &Vec<PathBuf>) -> Result<(), Box<dyn std::error::Err
     add_std_core_symbols(&mut symbol_table).expect("Failed to add std::core symbols.");
     
     let diagnostics = analyze_names(
-        &mut compilation_units.iter().map(Box::as_mut),
+        compilation_units.as_mut_slice(),
         &mut symbol_table
     );
     if diagnostics.is_empty() {

src/name_analysis/mod.rs

@@ -19,32 +19,39 @@ The resolve phase has one main responsibility: resolve all references based on t
 `scope_id` property.
 */
 
-use crate::ast::node::CompilationUnit;
+use crate::ast::node::{CompilationUnit, Identifier};
 use crate::diagnostic::DmDiagnostic;
 use crate::name_analysis::gather::gather_compilation_unit;
-use crate::name_analysis::resolve::resolve_compilation_unit;
+// use crate::name_analysis::resolve::resolve_compilation_unit;
 use crate::name_analysis::symbol_table::SymbolTable;
+use std::collections::HashMap;
 
 mod fqn_context;
 mod gather;
-mod resolve;
+// mod resolve;
 pub mod symbol;
 pub mod symbol_table;
 
 pub fn analyze_names(
-    compilation_units: &mut [CompilationUnit],
+    compilation_units: &mut [Box<CompilationUnit>],
     symbol_table: &mut SymbolTable,
 ) -> Vec<DmDiagnostic> {
     let mut diagnostics = vec![];
+    let mut identifier_scope_ids: HashMap<Identifier, usize> = HashMap::new();
 
     // gather symbols
     for compilation_unit in compilation_units.iter_mut() {
-        gather_compilation_unit(compilation_unit, symbol_table, &mut diagnostics);
+        gather_compilation_unit(
+            compilation_unit,
+            symbol_table,
+            &mut identifier_scope_ids,
+            &mut diagnostics,
+        );
     }
 
     // resolve symbols
     for compilation_unit in compilation_units.iter_mut() {
-        resolve_compilation_unit(compilation_unit, symbol_table, &mut diagnostics);
+        // resolve_compilation_unit(compilation_unit, symbol_table, &mut diagnostics);
     }
 
     diagnostics.into()
@@ -64,7 +71,7 @@ pub fn analyze_names(
 //     use indoc::indoc;
 //     use pest::Parser;
 //     use std::collections::HashMap;
-// 
+//
 //     fn assert_number_of_diagnostics(
 //         sources: HashMap<&str, &str>,
 //         symbol_table: &mut SymbolTable,
@@ -72,7 +79,7 @@ pub fn analyze_names(
 //     ) -> Vec<CompilationUnit> {
 //         let mut files = SimpleFiles::new();
 //         let mut compilation_units = vec![];
-// 
+//
 //         for (file_name, source) in sources {
 //             let file_id = files.add(file_name, source);
 //             let parse_result = DeimosParser::parse(Rule::CompilationUnit, source);
@@ -83,35 +90,35 @@ pub fn analyze_names(
 //             if pairs.as_str().trim() != source.trim() {
 //                 panic!("Parsing did not consume entire input.");
 //             }
-// 
+//
 //             compilation_units.push(build_ast(file_name, file_id, pairs.next().unwrap()));
 //         }
-// 
+//
 //         let diagnostics = analyze_names(&mut compilation_units, symbol_table);
-// 
+//
 //         if diagnostics.len() != n_diagnostics {
 //             let writer = StandardStream::stderr(ColorChoice::Always);
 //             let config = term::Config::default();
-// 
+//
 //             for diagnostic in &diagnostics {
 //                 term::emit(&mut writer.lock(), &config, &files, &diagnostic).unwrap();
 //             }
-// 
+//
 //             eprintln!("{}", symbol_table);
 //         }
-// 
+//
 //         assert_eq!(n_diagnostics, diagnostics.len());
-// 
+//
 //         compilation_units
 //     }
-// 
+//
 //     fn assert_no_diagnostics(
 //         sources: HashMap<&str, &str>,
 //         symbol_table: &mut SymbolTable,
 //     ) -> Vec<CompilationUnit> {
 //         assert_number_of_diagnostics(sources, symbol_table, 0)
 //     }
-// 
+//
 //     fn assert_saved_symbols(compilation_unit: &CompilationUnit) {
 //         walk_depth_first(compilation_unit, &mut |node_ref| match node_ref {
 //             NodeRef::Identifier(identifier) => {
@@ -130,7 +137,7 @@ pub fn analyze_names(
 //             _ => {}
 //         })
 //     }
-// 
+//
 //     fn assert_resolved_symbols(compilation_unit: &CompilationUnit) {
 //         walk_depth_first(compilation_unit, &mut |node_ref| match node_ref {
 //             NodeRef::UseStatement(use_statement) => match use_statement {
@@ -139,7 +146,7 @@ pub fn analyze_names(
 //             _ => {}
 //         })
 //     }
-// 
+//
 //     #[test]
 //     fn params_seen() {
 //         let sources: HashMap<&str, &str> = HashMap::from([(
@@ -149,13 +156,13 @@ pub fn analyze_names(
 //                 let x = args;
 //             }"},
 //         )]);
-// 
+//
 //         let cus = assert_no_diagnostics(sources, &mut SymbolTable::new());
 //         for ref cu in cus {
 //             assert_saved_symbols(cu);
 //         }
 //     }
-// 
+//
 //     #[test]
 //     fn two_files() {
 //         let sources: HashMap<&str, &str> = HashMap::from([
@@ -169,19 +176,19 @@ pub fn analyze_names(
 //                 "deps.dm",
 //                 indoc! {"
 //                 ns test;
-// 
+//
 //                 pub class Greeter {}
 //             "},
 //             ),
 //         ]);
-// 
+//
 //         let cus = assert_no_diagnostics(sources, &mut SymbolTable::new());
 //         for ref cu in cus {
 //             assert_saved_symbols(cu);
 //             assert_resolved_symbols(cu);
 //         }
 //     }
-// 
+//
 //     #[test]
 //     fn sees_std_core_println() {
 //         let sources: HashMap<&str, &str> = HashMap::from([(
@@ -192,7 +199,7 @@ pub fn analyze_names(
 //                 }
 //             "},
 //         )]);
-// 
+//
 //         let mut symbol_table = SymbolTable::new();
 //         add_std_core_symbols(&mut symbol_table).expect("Failed to add std::core symbols.");
 //         let cus = assert_no_diagnostics(sources, &mut symbol_table);
@@ -201,7 +208,7 @@ pub fn analyze_names(
 //             assert_resolved_symbols(cu);
 //         }
 //     }
-// 
+//
 //     #[test]
 //     fn sees_duplicate_fn() {
 //         let sources: HashMap<&str, &str> = HashMap::from([(
@@ -213,7 +220,7 @@ pub fn analyze_names(
 //         )]);
 //         assert_number_of_diagnostics(sources, &mut SymbolTable::new(), 1);
 //     }
-// 
+//
 //     #[test]
 //     fn use_class_from_other_file() {
 //         let sources: HashMap<&str, &str> = HashMap::from([
@@ -221,7 +228,7 @@ pub fn analyze_names(
 //                 "main.dm",
 //                 indoc! {"
 //                     use greeter::Greeter;
-// 
+//
 //                     fn test(greeter: Greeter) {}
 //                 "},
 //             ),
@@ -229,7 +236,7 @@ pub fn analyze_names(
 //                 "greeter.dm",
 //                 indoc! {"
 //                     ns greeter;
-// 
+//
 //                     class Greeter {}
 //                 "},
 //             ),
@@ -241,7 +248,7 @@ pub fn analyze_names(
 //             assert_resolved_symbols(cu);
 //         }
 //     }
-// 
+//
 //     #[test]
 //     fn shadow_import() {
 //         let sources: HashMap<&str, &str> = HashMap::from([
@@ -249,7 +256,7 @@ pub fn analyze_names(
 //                 "main.dm",
 //                 indoc! {"
 //                     use greeter::Greeter;
-// 
+//
 //                     class Greeter {}
 //                 "},
 //             ),
@@ -257,7 +264,7 @@ pub fn analyze_names(
 //                 "greeter.dm",
 //                 indoc! {"
 //                     ns greeter;
-// 
+//
 //                     class Greeter {}
 //                 "},
 //             ),

src/parser/ast.schema.yaml

@@ -57,6 +57,11 @@ $defs:
         description: Ordered child fields for this node.
         items:
           $ref: "#/$defs/StructChild"
+      derive:
+        type: array
+        description: Traits to derive.
+        items:
+          type: string
     required:
       - children
   StructChild:
@@ -201,6 +206,11 @@ $defs:
             description: Ordered members for this node.
             items:
               $ref: "#/$defs/LeafStructMemberDefinition"
+          derive:
+            type: array
+            description: Traits to derive.
+            items:
+              type: string
         required:
           - members
     required:

src/parser/ast.yaml

@@ -37,6 +37,11 @@ Identifier:
           kind: file_id
       - range:
           kind: range
+    derive:
+      - Clone
+      - PartialEq
+      - Eq
+      - Hash
 FullyQualifiedName:
   struct:
     children:
@@ -867,8 +872,8 @@ ComparisonRhs:
       - expression:
           member:
             rule: ShiftExpression
-            build: 
-              node: 
+            build:
+              node:
                 kind: Expression
                 with: ShiftExpression
 ComparisonOperator:
@@ -907,8 +912,8 @@ ShiftRhs:
       - expression:
           member:
             rule: AdditiveExpression
-            build: 
-              node: 
+            build:
+              node:
                 kind: Expression
                 with: AdditiveExpression
 ShiftOperator:
@@ -943,8 +948,8 @@ AdditiveRhs:
       - expression:
           member:
             rule: MultiplicativeExpression
-            build: 
-              node: 
+            build:
+              node:
                 kind: Expression
                 with: MultiplicativeExpression
 AdditiveOperator:
@@ -979,8 +984,8 @@ MultiplicativeRhs:
       - expression:
           member:
             rule: PrefixExpression
-            build: 
-              node: 
+            build:
+              node:
                 kind: Expression
                 with: PrefixExpression
 MultiplicativeOperator:
@@ -999,10 +1004,10 @@ PrefixExpression:
             variant: Prefix
             children:
               - operator:
-                  on_each: 
+                  on_each:
                     rule: PrefixOperator
               - expression:
-                  use_current: 
+                  use_current:
                     kind: Expression
       - SuffixExpression:
           pass_through:
@@ -1075,7 +1080,7 @@ ListExpression:
     children:
       - expression_list
 ParenthesizedExpression:
-  node_production: 
+  node_production:
     kind: Expression
     with: Expression