Fill out build-fn generation for ast nodes.

ast-generator/src/build_fn_gen.rs

@@ -1,9 +1,9 @@
 use crate::spec::{
-    BuildBooleanOn, ChildSpec, SingleBooleanChildToBuild, SingleChildToBuild,
+    BooleanBuild, ChildSpec, SingleBooleanChildToBuild, SingleChildToBuild,
-    SingleTypeChildToBuild, StructBuildSpec, VecChild, VecChildToBuild,
+    SingleLiteralChildToBuild, SingleTypeChildToBuild, StructBuildSpec, VecChild, VecChildToBuild,
 };
 use convert_case::{Case, Casing};
-use proc_macro2::TokenStream;
+use proc_macro2::{Ident, TokenStream};
 use quote::{format_ident, quote};
 
 pub fn make_build_fn_name(s: &str) -> String {
@@ -39,6 +39,16 @@ fn make_single_boolean_child_holder(
     }
 }
 
+fn make_literal_child_holder(
+    literal_child: &SingleLiteralChildToBuild,
+    literal_type_ident: Ident,
+) -> TokenStream {
+    let child_ident = format_ident!("{}", literal_child.var_name());
+    quote! {
+        let mut #child_ident: Option<#literal_type_ident> = None
+    }
+}
+
 fn make_child_holder(child_spec: &ChildSpec) -> Option<TokenStream> {
     match child_spec {
         ChildSpec::SkipChild(_) => None,
@@ -50,10 +60,30 @@ fn make_child_holder(child_spec: &ChildSpec) -> Option<TokenStream> {
             SingleChildToBuild::Boolean(boolean_child) => {
                 Some(make_single_boolean_child_holder(boolean_child))
             }
+            SingleChildToBuild::Int(literal_child) => Some(make_literal_child_holder(
+                literal_child,
+                format_ident!("i32"),
+            )),
+            SingleChildToBuild::Long(literal_child) => Some(make_literal_child_holder(
+                literal_child,
+                format_ident!("i64"),
+            )),
+            SingleChildToBuild::Double(literal_child) => Some(make_literal_child_holder(
+                literal_child,
+                format_ident!("f64"),
+            )),
+            SingleChildToBuild::String(literal_child) => Some(make_literal_child_holder(
+                literal_child,
+                format_ident!("String"),
+            )),
         },
     }
 }
 
+fn get_literal_child_ident(literal_child: &SingleLiteralChildToBuild) -> Ident {
+    format_ident!("{}", literal_child.var_name())
+}
+
 fn make_match_action(child_spec: &ChildSpec) -> TokenStream {
     match child_spec {
         ChildSpec::SkipChild(_) => quote! {},
@@ -78,10 +108,39 @@ fn make_match_action(child_spec: &ChildSpec) -> TokenStream {
             }
             SingleChildToBuild::Boolean(single_boolean_child) => {
                 let child_name_ident = format_ident!("{}", single_boolean_child.var_name());
-                match single_boolean_child.on() {
+                match single_boolean_child.build() {
-                    BuildBooleanOn::RulePresent => quote! {
+                    BooleanBuild::RulePresent => quote! {
                         #child_name_ident = true
                     },
+                    BooleanBuild::ParseWholePair => quote! {
+                        #child_name_ident = Some(inner_pair.as_str().parse().unwrap())
+                    },
+                }
+            }
+            SingleChildToBuild::Int(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                quote! {
+                    #child_ident = Some(inner_pair.as_str().parse().unwrap())
+                }
+            }
+            SingleChildToBuild::Long(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                quote! {
+                    let as_string = inner_pair.as_str();
+                    let without_el = &as_string[0..(as_string.len() - 1)];
+                    #child_ident = Some(without_el.parse().unwrap())
+                }
+            }
+            SingleChildToBuild::Double(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                quote! {
+                    #child_ident = Some(inner_pair.as_str().parse().unwrap())
+                }
+            }
+            SingleChildToBuild::String(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                quote! {
+                    #child_ident = Some(inner_pair.as_str().to_string())
                 }
             }
         },
@@ -133,6 +192,22 @@ fn make_child_arg(child_spec: &ChildSpec) -> Option<TokenStream> {
                 let child_ident = format_ident!("{}", single_boolean_child.var_name());
                 Some(quote! { #child_ident })
             }
+            SingleChildToBuild::Int(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                Some(quote! { #child_ident.unwrap() })
+            }
+            SingleChildToBuild::Long(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                Some(quote! { #child_ident.unwrap() })
+            },
+            SingleChildToBuild::Double(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                Some(quote! { #child_ident.unwrap() })
+            }
+            SingleChildToBuild::String(literal_child) => {
+                let child_ident = get_literal_child_ident(literal_child);
+                Some(quote! { #child_ident.unwrap() })
+            }
         },
     }
 }
@@ -234,7 +309,7 @@ mod tests {
     #[test]
     fn single_boolean_child_holder() {
         let single_boolean_child =
-            SingleBooleanChildToBuild::new("test_child", BuildBooleanOn::RulePresent);
+            SingleBooleanChildToBuild::new("test_child", BooleanBuild::RulePresent);
         assert_eq!(
             make_single_boolean_child_holder(&single_boolean_child).to_string(),
             quote! {

ast-generator/src/deserialize.rs

@@ -1,5 +1,10 @@
 use crate::build_fn_gen::make_build_fn_name;
-use crate::spec::{BuildBooleanOn, BuildSpec, ChildSpec, EnumBuildSpec, EnumRule, LeafEnumBuildSpec, LeafEnumRule, LeafEnumRuleBuild, SingleBooleanChildToBuild, SingleChild, SingleChildToBuild, SingleTypeChildToBuild, SkipChild, StructBuildSpec, VecChild, VecChildToBuild, VecTypeChildToBuild};
+use crate::spec::{
+    BooleanBuild, BuildSpec, ChildSpec, EnumBuildSpec, EnumRule, LeafEnumBuildSpec, LeafEnumRule,
+    LeafEnumRuleBuild, SingleBooleanChildToBuild, SingleChild, SingleChildToBuild,
+    SingleLiteralChildToBuild, SingleTypeChildToBuild, SkipChild, StructBuildSpec, VecChild,
+    VecChildToBuild, VecTypeChildToBuild,
+};
 use convert_case::{Case, Casing};
 use yaml_rust2::{Yaml, YamlLoader};
 
@@ -51,14 +56,29 @@ fn get_single_child_to_build(
                     .as_str()
                     .map(|s| s.to_string())
                     .unwrap_or(name.to_string());
-                let on = build["on"].as_str().unwrap();
+                match r#type {
-                if r#type.eq("boolean") && on.eq("rule_present") {
+                    "boolean" => {
+                        if yaml_is_string(&build["on"], "rule_present") {
                             SingleChildToBuild::Boolean(SingleBooleanChildToBuild::new(
                                 &var_name,
-                        BuildBooleanOn::RulePresent,
+                                BooleanBuild::RulePresent,
+                            ))
+                        } else if yaml_is_string(&build["from"], "parse_whole_pair") {
+                            SingleChildToBuild::Boolean(SingleBooleanChildToBuild::new(
+                                &var_name,
+                                BooleanBuild::ParseWholePair,
                             ))
                         } else {
-                    todo!("currently on boolean types with on: rule_present are supported")
+                            panic!("invalid build on/from with type boolean");
+                        }
+                    }
+                    "i32" => SingleChildToBuild::Int(SingleLiteralChildToBuild::new(&var_name)),
+                    "i64" => SingleChildToBuild::Long(SingleLiteralChildToBuild::new(&var_name)),
+                    "f64" => SingleChildToBuild::Double(SingleLiteralChildToBuild::new(&var_name)),
+                    "string" => {
+                        SingleChildToBuild::String(SingleLiteralChildToBuild::new(&var_name))
+                    }
+                    _ => panic!("unsupported build type: {}", r#type),
                 }
             }
             None => {
@@ -160,11 +180,13 @@ fn get_leaf_enum_rules(rules: &Yaml) -> Vec<LeafEnumRule> {
                 let (rule_as_string, rule_hash) = unwrap_single_member_hash(rule);
                 if get_as_bool(&rule_hash["child"]) {
                     let build = LeafEnumRuleBuild::Child {
-                        with: make_build_fn_name(&rule_as_string)
+                        with: make_build_fn_name(&rule_as_string),
                     };
                     LeafEnumRule::new(&rule_as_string, build)
                 } else {
-                    panic!("if a leaf_enum rule is a hash, its child prop must be present and true");
+                    panic!(
+                        "if a leaf_enum rule is a hash, its child prop must be present and true"
+                    );
                 }
             } else {
                 let rule_as_str = rule.as_str().unwrap();
@@ -221,7 +243,10 @@ fn deserialize_build_spec(build_spec_name: &Yaml, build_spec: &Yaml) -> BuildSpe
         ))
     } else if yaml_is_string(node_type, "leaf_enum") && rules.is_array() {
         let leaf_enum_rules = get_leaf_enum_rules(rules);
-        BuildSpec::LeafEnum(LeafEnumBuildSpec::from_name(build_spec_name_pascal, leaf_enum_rules))
+        BuildSpec::LeafEnum(LeafEnumBuildSpec::from_name(
+            build_spec_name_pascal,
+            leaf_enum_rules,
+        ))
     } else if rules.is_array() {
         // enum node
         let enum_rules = get_enum_rules(rules);

ast-generator/src/spec.rs

@@ -88,7 +88,7 @@ impl LeafEnumBuildSpec {
         Self {
             name: name.to_string(),
             build: name.to_string(),
-            rules
+            rules,
         }
     }
 
@@ -107,14 +107,14 @@ impl LeafEnumBuildSpec {
 
 pub struct LeafEnumRule {
     rule: String,
-    build: LeafEnumRuleBuild
+    build: LeafEnumRuleBuild,
 }
 
 impl LeafEnumRule {
     pub fn new(rule: &str, build: LeafEnumRuleBuild) -> Self {
         Self {
             rule: rule.to_string(),
-            build
+            build,
         }
     }
 
@@ -128,12 +128,8 @@ impl LeafEnumRule {
 }
 
 pub enum LeafEnumRuleBuild {
-    EnumRule {
+    EnumRule { rule: String },
-        rule: String,
+    Child { with: String },
-    },
-    Child {
-        with: String
-    }
 }
 
 pub struct StructBuildSpec {
@@ -327,6 +323,10 @@ impl SingleChild {
 pub enum SingleChildToBuild {
     Type(SingleTypeChildToBuild),
     Boolean(SingleBooleanChildToBuild),
+    Int(SingleLiteralChildToBuild),
+    Long(SingleLiteralChildToBuild),
+    Double(SingleLiteralChildToBuild),
+    String(SingleLiteralChildToBuild),
 }
 
 #[derive(Debug)]
@@ -382,14 +382,14 @@ impl SingleTypeChildToBuild {
 #[derive(Debug)]
 pub struct SingleBooleanChildToBuild {
     var_name: String,
-    on: BuildBooleanOn,
+    build: BooleanBuild,
 }
 
 impl SingleBooleanChildToBuild {
-    pub fn new(var_name: &str, on: BuildBooleanOn) -> Self {
+    pub fn new(var_name: &str, build: BooleanBuild) -> Self {
         Self {
             var_name: var_name.to_string(),
-            on,
+            build,
         }
     }
 
@@ -397,12 +397,30 @@ impl SingleBooleanChildToBuild {
         &self.var_name
     }
 
-    pub fn on(&self) -> &BuildBooleanOn {
+    pub fn build(&self) -> &BooleanBuild {
-        &self.on
+        &self.build
     }
 }
 
 #[derive(Debug)]
-pub enum BuildBooleanOn {
+pub enum BooleanBuild {
     RulePresent,
+    ParseWholePair,
+}
+
+#[derive(Debug)]
+pub struct SingleLiteralChildToBuild {
+    var_name: String,
+}
+
+impl SingleLiteralChildToBuild {
+    pub fn new(var_name: &str) -> Self {
+        Self {
+            var_name: var_name.to_string(),
+        }
+    }
+
+    pub fn var_name(&self) -> &str {
+        &self.var_name
+    }
 }

ast-generator/src/type_gen.rs

@@ -136,6 +136,7 @@ fn make_struct_type(build_spec: &StructBuildSpec) -> TokenStream {
                             &mut accessors,
                         );
                     }
+                    _ => todo!()
                 };
             }
         }

src/ast/build.rs

@@ -1 +0,0 @@
-include!(concat!(env!("OUT_DIR"), "/src/ast/build.rs"));

src/ast/mod.rs

@@ -1,4 +1,10 @@
-pub mod build;
+pub mod build {
+    //noinspection RsUnusedImport
+    use crate::parser::Rule;
+    
+    include!(concat!(env!("OUT_DIR"), "/src/ast/build.rs"));
+}
+
 pub mod children;
 pub mod node;
 pub mod pretty_print;

src/parser/ast.yaml

@@ -625,20 +625,17 @@ IntLiteral:
     - literal:
         build:
           type: i32
-          from: parse_number_base
 LongLiteral:
   children:
     - number_base
     - literal:
         build:
           type: i64
-          from: parse_number_base
 DoubleLiteral:
   children:
     - literal:
         build: 
           type: f64
-          from: parse_whole_pair
 NumberBase:
   rules:
     - BinaryBase
@@ -649,7 +646,6 @@ DecimalBase:
     - literal:
         build: 
           type: string
-          from: whole_pair
 BinaryBase:
   children:
     - binary_digits
@@ -658,7 +654,6 @@ BinaryDigits:
     - literal:
         build:
           type: string
-          from: whole_pair
 HexadecimalBase:
   children:
     - hexadecimal_digits
@@ -667,7 +662,6 @@ HexadecimalDigits:
     - literal:
         build: 
           type: string
-          from: whole_pair
 StringLiteral:
   rules:
     - SingleQuoteString
@@ -690,13 +684,11 @@ StringInner:
     - literal:
         build:
           type: string
-          from: whole_pair
 DStringInner:
   children:
     - literal:
         build: 
           type: string
-          from: whole_pair
 DStringExpression:
   children:
     - expression
@@ -713,7 +705,6 @@ BacktickInner:
     - literal:
         build: 
           type: string
-          from: whole_pair
 BooleanLiteral:
   children:
     - literal: