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ast_kind.rs
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ast_kind.rs
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use itertools::Itertools;
use quote::quote;
use syn::{parse_quote, Arm, Ident, Type, Variant};
use crate::{
markers::get_visit_markers, schema::RType, util::TypeExt, CodegenCtx, Generator,
GeneratorOutput, TypeRef,
};
use super::generated_header;
pub struct AstKindGenerator;
pub const BLACK_LIST: [&str; 65] = [
"Expression",
"ObjectPropertyKind",
"TemplateElement",
"ComputedMemberExpression",
"StaticMemberExpression",
"PrivateFieldExpression",
"AssignmentTargetPattern",
"ArrayAssignmentTarget",
"ObjectAssignmentTarget",
"AssignmentTargetRest",
"AssignmentTargetMaybeDefault",
"AssignmentTargetProperty",
"AssignmentTargetPropertyIdentifier",
"AssignmentTargetPropertyProperty",
"ChainElement",
"Statement",
"Declaration",
"ForStatementLeft",
"BindingPattern",
"BindingPatternKind",
"BindingProperty",
"ClassElement",
"AccessorProperty",
"ImportDeclarationSpecifier",
"WithClause",
"ImportAttribute",
"ImportAttributeKey",
"ExportDefaultDeclarationKind",
"ModuleExportName",
"TSEnumMemberName",
"TSLiteral",
"TSType",
"TSTypeOperator",
"TSArrayType",
"TSTupleType",
"TSOptionalType",
"TSRestType",
"TSTupleElement",
"TSInterfaceBody",
"TSSignature",
"TSIndexSignature",
"TSCallSignatureDeclaration",
"TSIndexSignatureName",
"TSTypePredicate",
"TSTypePredicateName",
"TSModuleDeclarationName",
"TSModuleDeclarationBody",
"TSTypeQueryExprName",
"TSImportAttribute",
"TSImportAttributes",
"TSImportAttributeName",
"TSFunctionType",
"TSConstructorType",
"TSExportAssignment",
"TSNamespaceExportDeclaration",
"JSDocNullableType",
"JSDocNonNullableType",
"JSDocUnknownType",
"JSXExpression",
"JSXEmptyExpression",
"JSXAttribute",
"JSXAttributeName",
"JSXAttributeValue",
"JSXChild",
"JSXSpreadChild",
];
pub fn blacklist((ident, _): &(Ident, Type)) -> bool {
!BLACK_LIST.contains(&ident.to_string().as_str())
}
pub fn aliased_nodes() -> [(Ident, Type); 1] {
use syn::parse_quote as pq;
[(pq!(ExpressionArrayElement), pq!(Expression<'a>))]
}
pub fn process_types(ty: &TypeRef) -> Vec<(Ident, Type)> {
let aliases = match &*ty.borrow() {
RType::Enum(enum_) => enum_
.item
.variants
.iter()
.map(|it| (it, get_visit_markers(&it.attrs).transpose().unwrap()))
.filter(|(_, markers)| markers.as_ref().is_some_and(|mk| mk.visit_as.is_some()))
.filter_map(|(it, markers)| {
markers.map(|markers| {
let field = it.fields.iter().next().unwrap();
let type_name = field.ty.get_ident().inner_ident();
(markers.visit_as.expect("Already checked"), parse_quote!(#type_name<'a>))
})
})
.collect_vec(),
RType::Struct(struct_) => struct_
.item
.fields
.iter()
.map(|it| (it, get_visit_markers(&it.attrs).transpose().unwrap()))
.filter(|(_, markers)| markers.as_ref().is_some_and(|mk| mk.visit_as.is_some()))
.filter_map(|(field, markers)| {
markers.map(|markers| {
let type_name = field.ty.get_ident().inner_ident();
(markers.visit_as.expect("Already checked"), parse_quote!(#type_name<'a>))
})
})
.collect_vec(),
_ => panic!(),
};
Some(ty)
.into_iter()
.map(|kind| {
if let kind @ (RType::Enum(_) | RType::Struct(_)) = &*kind.borrow() {
let ident = kind.ident().unwrap().clone();
let typ = kind.as_type().unwrap();
(ident, typ)
} else {
panic!()
}
})
.chain(aliases)
.collect()
}
impl Generator for AstKindGenerator {
fn name(&self) -> &'static str {
"AstKindGenerator"
}
fn generate(&mut self, ctx: &CodegenCtx) -> GeneratorOutput {
let have_kinds: Vec<(Ident, Type)> = ctx
.ty_table
.iter()
.filter(|it| it.borrow().visitable())
.filter(
|maybe_kind| matches!(&*maybe_kind.borrow(), kind @ (RType::Enum(_) | RType::Struct(_)) if kind.visitable())
)
.flat_map(process_types)
.filter(blacklist)
.chain(aliased_nodes())
.collect();
let types: Vec<Variant> =
have_kinds.iter().map(|(ident, _)| parse_quote!(#ident)).collect_vec();
let kinds: Vec<Variant> =
have_kinds.iter().map(|(ident, typ)| parse_quote!(#ident(&'a #typ))).collect_vec();
let span_matches: Vec<Arm> = have_kinds
.iter()
.map(|(ident, _)| parse_quote!(Self :: #ident(it) => it.span()))
.collect_vec();
let header = generated_header!();
GeneratorOutput::Stream((
"ast_kind",
quote! {
#header
use crate::ast::*;
use oxc_span::{GetSpan, Span};
endl!();
#[derive(Debug, Clone, Copy)]
pub enum AstType {
#(#types),*,
}
endl!();
/// Untyped AST Node Kind
#[derive(Debug, Clone, Copy)]
pub enum AstKind<'a> {
#(#kinds),*,
}
endl!();
impl<'a> GetSpan for AstKind<'a> {
#[allow(clippy::match_same_arms)]
fn span(&self) -> Span {
match self {
#(#span_matches),*,
}
}
}
},
))
}
}