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Refactor struct build-fn gen.

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This commit is contained in:
Jesse Brault 2025-09-15 20:10:59 -05:00
parent b5cdb8dd29
commit 5d640ca585
1 changed files with 89 additions and 194 deletions
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281
ast-generator/src/struct_build_fn.rs
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@ -1,141 +1,98 @@
use crate::spec::{
BooleanChildToBuild, MemberChildToBuild, NodeChildToBuild,
StructBuildSpec, StructChildSpec, VecChild, VecChildToBuild,
};
use crate::util::make_build_pair;
use proc_macro2::{Ident, TokenStream};
use crate::spec::{BooleanChildToBuild, MemberChildToBuild, NodeChildToBuild, StructBuildSpec, StructChildSpec, VecChild, VecChildToBuild};
use crate::util::{make_build_fn_name, make_build_pair};
use convert_case::{Case, Casing};
use proc_macro2::TokenStream;
use quote::{format_ident, quote};
fn make_var_name(s: &str) -> String {
s.to_case(Case::Snake)
}
fn make_vec_child_holder(vec_child: &VecChild) -> TokenStream {
let (child_ident, child_type_ident) = match vec_child.build() {
VecChildToBuild::Node(vec_type_child) => (
format_ident!("{}", vec_type_child.var_name()),
format_ident!("{}", vec_type_child.build()),
),
let child_ident = format_ident!("{}", vec_child.name());
let child_type_ident = match vec_child.build() {
VecChildToBuild::Node(node_child) => {
format_ident!("{}", node_child.build())
},
VecChildToBuild::String => format_ident!("{}", "String")
};
quote! {
let mut #child_ident: Vec<Box<#child_type_ident>> = vec![]
}
}
fn make_single_type_child_holder(single_type_child: &NodeChildToBuild) -> TokenStream {
let child_ident = format_ident!("{}", single_type_child.var_name());
let child_type_ident = format_ident!("{}", single_type_child.build());
fn make_node_child_holder(node_child: &NodeChildToBuild) -> TokenStream {
let child_ident = format_ident!("{}", make_var_name(node_child.build()));
let child_type_ident = format_ident!("{}", node_child.build());
quote! {
let mut #child_ident: Option<Box<#child_type_ident>> = None
}
}
fn make_single_boolean_child_holder(single_boolean_child: &BooleanChildToBuild) -> TokenStream {
let child_ident = format_ident!("{}", single_boolean_child.name());
fn make_boolean_child_holder(boolean_child: &BooleanChildToBuild) -> TokenStream {
let child_ident = format_ident!("{}", boolean_child.name());
quote! {
let mut #child_ident: bool = false
}
}
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: &StructChildSpec) -> Option<TokenStream> {
match child_spec {
StructChildSpec::SkipChild(_) => None,
StructChildSpec::VecChild(vec_child) => Some(make_vec_child_holder(vec_child)),
StructChildSpec::MemberChild(single_child) => match single_child.build() {
MemberChildToBuild::Node(single_type_child) => {
Some(make_single_type_child_holder(single_type_child))
StructChildSpec::MemberChild(member_child) => match member_child.build() {
MemberChildToBuild::Node(node_child) => {
Some(make_node_child_holder(node_child))
}
MemberChildToBuild::Boolean(boolean_child) => {
Some(make_single_boolean_child_holder(boolean_child))
Some(make_boolean_child_holder(boolean_child))
}
MemberChildToBuild::Int(literal_child) => Some(make_literal_child_holder(
literal_child,
format_ident!("i32"),
)),
MemberChildToBuild::Long(literal_child) => Some(make_literal_child_holder(
literal_child,
format_ident!("i64"),
)),
MemberChildToBuild::Double(literal_child) => Some(make_literal_child_holder(
literal_child,
format_ident!("f64"),
)),
MemberChildToBuild::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_vec_child_match_action(vec_child: &VecChild) -> TokenStream {
let child_name_ident = format_ident!("{}", vec_child.name());
let build_fn_ident = match vec_child.build() {
VecChildToBuild::Node(vec_node_child) => {
format_ident!("{}", make_build_fn_name(vec_node_child.build()))
},
VecChildToBuild::String => {
format_ident!("{}", make_build_fn_name(vec_child.rule()))
}
};
quote! {
#child_name_ident.push(Box::new(#build_fn_ident(inner_pair)))
}
}
fn make_node_member_child_match_action(node_child: &NodeChildToBuild) -> TokenStream {
let child_name_ident = format_ident!("{}", make_var_name(node_child.build()));
let build_fn_ident = format_ident!("{}", make_build_fn_name(node_child.build()));
quote! {
#child_name_ident = Some(Box::new(#build_fn_ident(inner_pair)))
}
}
fn make_boolean_member_child_match_action(boolean_child: &BooleanChildToBuild) -> TokenStream {
let child_name_ident = format_ident!("{}", make_var_name(boolean_child.name()));
quote! {
#child_name_ident = true
}
}
fn make_match_action(child_spec: &StructChildSpec) -> TokenStream {
match child_spec {
StructChildSpec::SkipChild(_) => quote! {},
StructChildSpec::VecChild(vec_child) => {
let (child_name_ident, build_fn_ident) = match vec_child.build() {
VecChildToBuild::Node(vec_type_child) => (
format_ident!("{}", vec_type_child.var_name()),
format_ident!("{}", vec_type_child.with()),
),
};
quote! {
#child_name_ident.push(Box::new(#build_fn_ident(inner_pair)))
}
make_vec_child_match_action(vec_child)
}
StructChildSpec::MemberChild(single_child) => match single_child.build() {
MemberChildToBuild::Node(single_type_child) => {
let child_name_ident = format_ident!("{}", single_type_child.var_name());
let build_fn_ident = format_ident!("{}", single_type_child.with());
quote! {
#child_name_ident = Some(Box::new(#build_fn_ident(inner_pair)))
}
}
MemberChildToBuild::Boolean(single_boolean_child) => {
let child_name_ident = format_ident!("{}", single_boolean_child.name());
match single_boolean_child.build() {
BooleanBuild::RulePresent => quote! {
#child_name_ident = true
},
BooleanBuild::ParseWholePair => quote! {
#child_name_ident = Some(inner_pair.as_str().parse().unwrap())
},
}
}
MemberChildToBuild::Int(literal_child) => {
let child_ident = get_literal_child_ident(literal_child);
quote! {
#child_ident = Some(inner_pair.as_str().parse().unwrap())
}
}
MemberChildToBuild::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())
}
}
MemberChildToBuild::Double(literal_child) => {
let child_ident = get_literal_child_ident(literal_child);
quote! {
#child_ident = Some(inner_pair.as_str().parse().unwrap())
}
}
MemberChildToBuild::String(literal_child) => {
let child_ident = get_literal_child_ident(literal_child);
quote! {
#child_ident = Some(inner_pair.as_str().to_string())
MemberChildToBuild::Node(node_child) => {
make_node_member_child_match_action(node_child)
}
MemberChildToBuild::Boolean(boolean_child) => {
make_boolean_member_child_match_action(boolean_child)
}
},
}
@ -156,51 +113,43 @@ fn make_rule_matcher(child_spec: &StructChildSpec) -> TokenStream {
}
}
fn make_vec_child_arg(vec_child: &VecChild) -> TokenStream {
let child_ident = format_ident!("{}", vec_child.name());
quote! { #child_ident }
}
fn make_node_member_child_arg(name: &str, node_child: &NodeChildToBuild) -> TokenStream {
let child_ident = format_ident!("{}", name);
if node_child.optional() {
quote! { #child_ident }
} else if let Some(or_else) = node_child.or_else() {
let child_type_ident = format_ident!("{}", node_child.build());
let or_else_ident = format_ident!("{}", or_else);
quote! {
#child_ident.unwrap_or_else(|| Box::new(#child_type_ident::#or_else_ident()))
}
} else {
quote! { #child_ident.unwrap() }
}
}
fn make_boolean_member_child_arg(boolean_child: &BooleanChildToBuild) -> TokenStream {
let child_ident = format_ident!("{}", boolean_child.name());
quote! { #child_ident }
}
fn make_child_arg(child_spec: &StructChildSpec) -> Option<TokenStream> {
match child_spec {
StructChildSpec::SkipChild(_) => None,
StructChildSpec::VecChild(vec_child) => {
let child_ident = match vec_child.build() {
VecChildToBuild::Node(vec_type_child) => {
format_ident!("{}", vec_type_child.var_name())
Some(make_vec_child_arg(vec_child))
}
};
Some(quote! { #child_ident })
}
StructChildSpec::MemberChild(single_child) => match single_child.build() {
StructChildSpec::MemberChild(member_child) => match member_child.build() {
MemberChildToBuild::Node(single_type_child) => {
let child_ident = format_ident!("{}", single_type_child.var_name());
if single_type_child.optional() {
Some(quote! { #child_ident })
} else if let Some(or_else) = single_type_child.or_else() {
let child_type_ident = format_ident!("{}", single_type_child.build());
let or_else_ident = format_ident!("{}", or_else);
Some(quote! {
#child_ident.unwrap_or_else(|| Box::new(#child_type_ident::#or_else_ident()))
})
} else {
Some(quote! { #child_ident.unwrap() })
Some(make_node_member_child_arg(member_child.name(), single_type_child))
}
}
MemberChildToBuild::Boolean(single_boolean_child) => {
let child_ident = format_ident!("{}", single_boolean_child.name());
Some(quote! { #child_ident })
}
MemberChildToBuild::Int(literal_child) => {
let child_ident = get_literal_child_ident(literal_child);
Some(quote! { #child_ident.unwrap() })
}
MemberChildToBuild::Long(literal_child) => {
let child_ident = get_literal_child_ident(literal_child);
Some(quote! { #child_ident.unwrap() })
}
MemberChildToBuild::Double(literal_child) => {
let child_ident = get_literal_child_ident(literal_child);
Some(quote! { #child_ident.unwrap() })
}
MemberChildToBuild::String(literal_child) => {
let child_ident = get_literal_child_ident(literal_child);
Some(quote! { #child_ident.unwrap() })
MemberChildToBuild::Boolean(boolean_child) => {
Some(make_boolean_member_child_arg(boolean_child))
}
},
}
@ -210,7 +159,6 @@ fn make_return_value_stream(build_spec: &StructBuildSpec) -> TokenStream {
let type_ident = format_ident!("{}", build_spec.build());
let child_args = build_spec
.children()
.iter()
.map(|child| make_child_arg(child))
.filter(|child_arg| child_arg.is_some())
.map(|child_arg| child_arg.unwrap())
@ -224,13 +172,12 @@ fn make_return_value_stream(build_spec: &StructBuildSpec) -> TokenStream {
}
pub fn make_struct_build_fn(build_spec: &StructBuildSpec) -> TokenStream {
let build_fn_ident = format_ident!("{}", build_spec.with()); // TODO: get rid of with
let pair_ident = format_ident!("{}", make_build_pair(build_spec.var_name())); // TODO: get rid of var_name
let build_fn_ident = format_ident!("{}", make_build_fn_name(build_spec.build()));
let pair_ident = format_ident!("{}", make_build_pair(build_spec.build()));
let return_type_ident = format_ident!("{}", build_spec.build());
let child_holders = build_spec
.children()
.iter()
.map(|child_spec| make_child_holder(child_spec))
.filter(|child_holder| child_holder.is_some())
.map(|child_holder| child_holder.unwrap())
@ -238,7 +185,6 @@ pub fn make_struct_build_fn(build_spec: &StructBuildSpec) -> TokenStream {
let rule_matchers = build_spec
.children()
.iter()
.map(|child_spec| make_rule_matcher(child_spec))
.collect::<Vec<_>>();
@ -263,54 +209,3 @@ pub fn make_struct_build_fn(build_spec: &StructBuildSpec) -> TokenStream {
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::spec::VecNodeChildToBuild;
#[test]
fn vec_child_holder() {
let vec_child = VecChild::new(
"test_child",
"Test",
VecChildToBuild::Node(VecNodeChildToBuild::new(
"TestType",
"test_child",
"build_test_child",
)),
);
assert_eq!(
make_vec_child_holder(&vec_child).to_string(),
quote! {
let mut test_child: Vec<Box<TestType>> = vec![]
}
.to_string()
);
}
#[test]
fn single_type_child_holder() {
let single_type_child = NodeChildToBuild::from_build_or_rule("TestType", None, false);
assert_eq!(
make_single_type_child_holder(&single_type_child).to_string(),
quote! {
let mut test_type: Option<Box<TestType>> = None
}
.to_string()
);
}
#[test]
fn single_boolean_child_holder() {
let single_boolean_child =
BooleanChildToBuild::new("test_child", BooleanBuild::RulePresent);
assert_eq!(
make_single_boolean_child_holder(&single_boolean_child).to_string(),
quote! {
let mut test_child: bool = false
}
.to_string()
);
}
}