mirror of
https://github.com/swc-project/swc.git
synced 2024-12-25 14:43:33 +03:00
feat(es/typescript): Improve fast TS strip (#9154)
**Description:** It's almost done, but it need some more adjustment for arrow functions.
This commit is contained in:
Donny/강동윤
GitHub
parent
2daee6fa7e
commit
05c721030a
@ -1 +1 @@
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Subproject commit a03c69227413dfcac8a1e9f89d93554fa3b8b7fe
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Subproject commit 8e9c0b0fb3d548f378420aabbd351087efb5d5e5
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@ -7,9 +7,12 @@ use swc_common::{
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BytePos, FileName, SourceMap, Span, Spanned,
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};
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use swc_ecma_ast::{
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BindingIdent, Decorator, EsVersion, Ident, ImportDecl, ImportSpecifier, Param, Pat, Program,
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TsAsExpr, TsConstAssertion, TsEnumDecl, TsInstantiation, TsModuleDecl, TsModuleName,
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TsNamespaceDecl, TsNonNullExpr, TsParamPropParam, TsSatisfiesExpr, TsTypeAliasDecl, TsTypeAnn,
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ArrowExpr, BindingIdent, Class, ClassMethod, ClassProp, Decorator, EsVersion, ExportAll,
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ExportDecl, ExportSpecifier, FnDecl, Ident, ImportDecl, ImportSpecifier, MethodKind,
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NamedExport, Param, Pat, Program, TsAsExpr, TsConstAssertion, TsEnumDecl, TsInstantiation,
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TsInterfaceDecl, TsModuleDecl, TsModuleName, TsNamespaceDecl, TsNonNullExpr, TsParamPropParam,
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TsSatisfiesExpr, TsTypeAliasDecl, TsTypeAnn, TsTypeAssertion, TsTypeParamDecl,
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TsTypeParamInstantiation, VarDecl,
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};
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use swc_ecma_parser::{
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parse_file_as_module, parse_file_as_program, parse_file_as_script, Syntax, TsSyntax,
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@ -83,7 +86,7 @@ pub fn operate(
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}
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// Strip typescript types
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let mut ts_strip = TsStrip::new(fm.src.clone());
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let mut ts_strip = TsStrip::new(cm.clone(), fm.src.clone());
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program.visit_with(&mut ts_strip);
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let replacements = ts_strip.replacements;
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@ -98,19 +101,48 @@ pub fn operate(
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code[(r.0 .0 - 1) as usize..(r.1 .0 - 1) as usize].fill(b' ');
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}
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// Assert that removal does not overlap with each other
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for removal in ts_strip.removals.iter() {
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for r in &ts_strip.removals {
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if removal == r {
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continue;
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}
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assert!(
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r.0 < removal.0 || r.1 < removal.0 || r.0 > removal.1 || r.1 > removal.1,
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"removal {:?} overlaps with replacement {:?}",
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removal,
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r
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);
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}
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}
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for removal in ts_strip.removals.iter().copied().rev() {
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code.drain((removal.0 .0 - 1) as usize..(removal.1 .0 - 1) as usize);
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}
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String::from_utf8(code).map_err(|_| anyhow::anyhow!("failed to convert to utf-8"))
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}
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struct TsStrip {
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cm: Lrc<SourceMap>,
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src: Lrc<String>,
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/// Replaced with whitespace
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replacements: Vec<(BytePos, BytePos)>,
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/// Applied after replacements. Used for arrow functions.
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removals: Vec<(BytePos, BytePos)>,
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}
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impl TsStrip {
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fn new(src: Lrc<String>) -> Self {
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fn new(cm: Lrc<SourceMap>, src: Lrc<String>) -> Self {
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TsStrip {
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cm,
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src,
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replacements: Default::default(),
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removals: Default::default(),
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}
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}
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}
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@ -119,15 +151,208 @@ impl TsStrip {
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fn add_replacement(&mut self, span: Span) {
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self.replacements.push((span.lo, span.hi));
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}
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fn add_removal(&mut self, span: Span) {
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self.removals.push((span.lo, span.hi));
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}
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}
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impl Visit for TsStrip {
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fn visit_arrow_expr(&mut self, n: &ArrowExpr) {
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if let Some(ret) = &n.return_type {
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let mut sp = self.cm.span_extend_to_prev_char(ret.span, ')');
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let pos = self.src[(sp.hi.0 as usize - 1)..].find("=>").unwrap();
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sp.hi.0 += pos as u32;
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self.add_removal(sp);
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}
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n.type_params.visit_with(self);
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n.params.visit_with(self);
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n.body.visit_with(self);
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}
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fn visit_binding_ident(&mut self, n: &BindingIdent) {
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n.visit_children_with(self);
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if n.optional {
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self.add_replacement(span(n.id.span.hi, n.id.span.hi + BytePos(1)));
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}
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}
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fn visit_class(&mut self, n: &Class) {
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n.visit_children_with(self);
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let lo = match &n.super_class {
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Some(v) => v.span().hi,
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None => n.span.lo,
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};
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let hi = skip_until(self.src.as_bytes(), lo.0, b'{');
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self.add_replacement(span(lo, BytePos(hi)));
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}
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fn visit_class_method(&mut self, n: &ClassMethod) {
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if n.function.body.is_none() {
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self.add_replacement(n.span);
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return;
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}
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let hi = match n.kind {
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MethodKind::Method => {
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if n.is_static {
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self.cm
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.span_extend_to_next_str(span(n.span.lo, n.span.lo), "static", false)
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.hi
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} else {
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n.key.span().lo
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}
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}
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MethodKind::Getter => {
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self.cm
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.span_extend_to_next_str(span(n.span.lo, n.span.lo), "get", false)
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.hi
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}
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MethodKind::Setter => {
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self.cm
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.span_extend_to_next_str(span(n.span.lo, n.span.lo), "set", false)
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.hi
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}
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};
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self.add_replacement(span(n.span.lo, hi));
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n.visit_children_with(self);
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}
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fn visit_class_prop(&mut self, n: &ClassProp) {
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if n.declare {
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self.add_replacement(n.span);
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return;
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}
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let hi = if n.is_static {
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self.cm
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.span_extend_to_next_str(span(n.span.lo, n.span.lo), "static", false)
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.hi
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} else {
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n.key.span().lo
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};
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self.add_replacement(span(n.span.lo, hi));
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n.visit_children_with(self);
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}
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fn visit_decorator(&mut self, n: &Decorator) {
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HANDLER.with(|handler| {
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handler.span_err(n.span, "Decorators are not supported");
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});
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}
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fn visit_export_all(&mut self, n: &ExportAll) {
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if n.type_only {
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self.add_replacement(n.span);
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return;
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}
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n.visit_children_with(self);
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}
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fn visit_export_decl(&mut self, n: &ExportDecl) {
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match n.decl {
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swc_ecma_ast::Decl::TsInterface(_)
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| swc_ecma_ast::Decl::TsTypeAlias(_)
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| swc_ecma_ast::Decl::TsEnum(_)
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| swc_ecma_ast::Decl::TsModule(_) => {
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self.add_replacement(n.span);
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}
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_ => {
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n.visit_children_with(self);
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}
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}
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}
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fn visit_fn_decl(&mut self, n: &FnDecl) {
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if n.function.body.is_none() {
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self.add_replacement(n.function.span);
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return;
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}
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n.visit_children_with(self);
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}
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fn visit_import_decl(&mut self, n: &ImportDecl) {
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if n.type_only {
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self.add_replacement(n.span);
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return;
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}
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n.visit_children_with(self);
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}
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fn visit_import_specifiers(&mut self, n: &[ImportSpecifier]) {
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for (i, import) in n.iter().enumerate() {
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let ImportSpecifier::Named(import) = import else {
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continue;
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};
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if import.is_type_only {
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let mut span = import.span;
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span.hi.0 = n.get(i + 1).map(|x| x.span_lo().0).unwrap_or_else(|| {
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let bytes = self.src.as_bytes();
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skip_until(bytes, span.hi.0, b'}')
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});
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self.add_replacement(span);
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}
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}
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}
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fn visit_named_export(&mut self, n: &NamedExport) {
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if n.type_only {
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self.add_replacement(n.span);
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return;
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}
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for export in n.specifiers.iter() {
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if let ExportSpecifier::Named(e) = export {
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if e.is_type_only {
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let sp = self.cm.span_extend_to_next_char(e.span, ',');
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self.add_replacement(span(sp.lo, sp.hi + BytePos(1)));
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}
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}
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}
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}
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fn visit_params(&mut self, n: &[Param]) {
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if let Some(p) = n.first().filter(|param| {
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matches!(
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¶m.pat,
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Pat::Ident(BindingIdent {
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id: Ident { sym, .. },
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..
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}) if &**sym == "this"
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)
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}) {
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let mut span = p.span;
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if n.len() == 1 {
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let bytes = self.src.as_bytes();
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span.hi.0 = skip_until(bytes, span.hi.0, b')');
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} else {
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span.hi = n[1].span.lo;
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n[1..].visit_children_with(self);
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}
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self.add_replacement(span);
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return;
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}
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n.visit_children_with(self);
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}
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fn visit_ts_as_expr(&mut self, n: &TsAsExpr) {
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self.add_replacement(span(n.expr.span().hi, n.span.hi));
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@ -160,6 +385,10 @@ impl Visit for TsStrip {
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n.expr.visit_children_with(self);
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}
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fn visit_ts_interface_decl(&mut self, n: &TsInterfaceDecl) {
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self.add_replacement(n.span);
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}
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fn visit_ts_module_decl(&mut self, n: &TsModuleDecl) {
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if n.declare || matches!(n.id, TsModuleName::Str(..)) {
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self.add_replacement(n.span);
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@ -217,67 +446,28 @@ impl Visit for TsStrip {
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self.add_replacement(n.span);
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}
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fn visit_binding_ident(&mut self, n: &BindingIdent) {
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n.visit_children_with(self);
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fn visit_ts_type_assertion(&mut self, n: &TsTypeAssertion) {
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self.add_replacement(span(n.span.lo, n.expr.span().lo));
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if n.optional {
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self.add_replacement(span(n.id.span.hi, n.id.span.hi + BytePos(1)));
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}
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n.expr.visit_children_with(self);
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}
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fn visit_params(&mut self, n: &[Param]) {
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if let Some(p) = n.first().filter(|param| {
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matches!(
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¶m.pat,
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Pat::Ident(BindingIdent {
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id: Ident { sym, .. },
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..
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}) if &**sym == "this"
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)
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}) {
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let mut span = p.span;
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if n.len() == 1 {
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let bytes = self.src.as_bytes();
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span.hi.0 = skip_until(bytes, span.hi.0, b')');
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} else {
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span.hi = n[1].span.lo;
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n[1..].visit_children_with(self);
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}
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self.add_replacement(span);
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return;
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}
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n.visit_children_with(self);
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fn visit_ts_type_param_decl(&mut self, n: &TsTypeParamDecl) {
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self.add_replacement(n.span);
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}
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fn visit_import_decl(&mut self, n: &ImportDecl) {
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if n.type_only {
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fn visit_ts_type_param_instantiation(&mut self, n: &TsTypeParamInstantiation) {
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self.add_replacement(span(n.span.lo, n.span.hi));
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}
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fn visit_var_decl(&mut self, n: &VarDecl) {
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if n.declare {
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self.add_replacement(n.span);
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return;
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}
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n.visit_children_with(self);
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}
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fn visit_import_specifiers(&mut self, n: &[ImportSpecifier]) {
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for (i, import) in n.iter().enumerate() {
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let ImportSpecifier::Named(import) = import else {
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continue;
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};
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if import.is_type_only {
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let mut span = import.span;
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span.hi.0 = n.get(i + 1).map(|x| x.span_lo().0).unwrap_or_else(|| {
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let bytes = self.src.as_bytes();
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skip_until(bytes, span.hi.0, b'}')
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});
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self.add_replacement(span);
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}
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}
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}
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}
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fn span(lo: BytePos, hi: BytePos) -> Span {
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171
crates/swc_fast_ts_strip/tests/fixture/test-case-1.js
Normal file
171
crates/swc_fast_ts_strip/tests/fixture/test-case-1.js
Normal file
@ -0,0 +1,171 @@
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let x /**/ /**/ = 1 ;
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// ^^^^^^^^ ^
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[] ;
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// ^^^^^^^^^^^^^^^^^^
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( "test");
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//^^^^^^^^
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class C /**/ /*︎*/ extends Array {
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// ^^^^^ ^^^ ^^^^^^^^^^^^^^
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field/**/ /**/ = "";
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// ^^^^^^^^ ^^^^^^^^
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static accessor f1;
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f2/**/!/**/ /*︎*/;
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// ^^^^^^^ ^ ^^^^^^^^
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// ^^^^^^^^^^^^^^^^ declared property
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method/**/ /*︎*/(/*︎*/ a /*︎*/ /**/)/*︎*/ /*︎*/ {
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// ^^^^^^ ^^^ ^^^^^^^^ ^ ^^^^^^^^ ^^^^^^
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}
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[key ] ;
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// ^^^^^^^^^^^^^^^^^^^ index signature
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get g() { return 1 };
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// ^^^^^
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set g(v ) { };
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// ^^^^^
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}
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class D extends C {
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// ^^^^^
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method(...args) { }
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// ^^^^^^^^ ^^^^^
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}
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{
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// ^^^^^^^^
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a;
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// ^^^^^^^^^^^ abstract property
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b;
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// ^^^^^^^^^^^^^^^^^^ abstract method
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}
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{
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let m = new (Map ) ([] );
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// ^ ^^^^^^^^^^^^^^^^ ^
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}
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{
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let a = (foo ) ;
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// ^ ^^^^^
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}
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{
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let a = (foo ) ([] );
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// ^ ^^^^^ ^
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}
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{
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let f = function (p ) { }
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// ^^^^^
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}
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{
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// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ overload
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function overload() { }
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// ^^^^^
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}
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/** @doc */
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// ^^^^^^^^^^^ interface
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void 0;
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/** @doc */
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// ^^^^^^^^ type alias
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/**/
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// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `import type`
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/**/
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// ^^^^^^^^^^^^^^^^^^ `export type`
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/**/
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// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `export type *`
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|
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import { deepEqual } from "node:assert";
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// ^^^^^^^^^^^^^^^^^^^^^^^^^
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export {
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C,
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|
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// ^^^^^^
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}
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|
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/**/
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// ^^^^^^^^^^^^^^^^^^^
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function foo (p = ()=> 1) {
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// ^^^ ^^^^^ ^^^^^ ^^^^^
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return p ;
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// ^^^^^^
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}
|
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|
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/**/
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// ^^^^^^^^^^^^^^^^^^ `declare enum`
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|
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void 0;
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|
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/**/
|
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// ^^^^^^^^^^^^^^^^^^^^^^ `declare namespace`
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||||
|
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void 0;
|
||||
|
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/**/
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// ^^^^^^^^^^^^^^^^^^^ `declare module`
|
||||
|
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void 0;
|
||||
|
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/**/
|
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// ^^^^^^^^^^^^^^ `declare let`
|
||||
|
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void 0;
|
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|
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/**/ { }
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `declare class`
|
||||
|
||||
void 0;
|
||||
|
||||
/**/
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `declare function`
|
||||
|
||||
void 0;
|
||||
|
||||
// `=>` spanning line cases:
|
||||
{
|
||||
()
|
||||
=>
|
||||
1
|
||||
};
|
||||
{
|
||||
()=>
|
||||
1
|
||||
};
|
||||
{
|
||||
(
|
||||
)
|
||||
=>
|
||||
1
|
||||
};
|
||||
{
|
||||
(
|
||||
)=>
|
||||
1
|
||||
};
|
||||
{
|
||||
(
|
||||
)=>
|
||||
1
|
||||
};
|
||||
{
|
||||
(a, b, c = [] /*comment-1*/)=>
|
||||
1
|
||||
};
|
||||
177
crates/swc_fast_ts_strip/tests/fixture/test-case-1.ts
Normal file
177
crates/swc_fast_ts_strip/tests/fixture/test-case-1.ts
Normal file
@ -0,0 +1,177 @@
|
||||
let x /**/: number/**/ = 1!;
|
||||
// ^^^^^^^^ ^
|
||||
|
||||
[] as [] satisfies [];
|
||||
// ^^^^^^^^^^^^^^^^^^
|
||||
|
||||
(<string>"test");
|
||||
//^^^^^^^^
|
||||
|
||||
class C /**/<T>/*︎*/ extends Array/**/<T> /*︎*/ implements I, J/*︎*/ {
|
||||
// ^^^^^ ^^^ ^^^^^^^^^^^^^^
|
||||
readonly field/**/: string/**/ = "";
|
||||
// ^^^^^^^^ ^^^^^^^^
|
||||
static accessor f1;
|
||||
private f2/**/!/**/: string/*︎*/;
|
||||
// ^^^^^^^ ^ ^^^^^^^^
|
||||
declare f3: any;
|
||||
// ^^^^^^^^^^^^^^^^ declared property
|
||||
|
||||
public method/**/<T>/*︎*/(/*︎*/this: T,/**/ a? /*︎*/: string/**/)/*︎*/: void/*︎*/ {
|
||||
// ^^^^^^ ^^^ ^^^^^^^^ ^ ^^^^^^^^ ^^^^^^
|
||||
}
|
||||
|
||||
[key: string]: any;
|
||||
// ^^^^^^^^^^^^^^^^^^^ index signature
|
||||
|
||||
get g(): any { return 1 };
|
||||
// ^^^^^
|
||||
set g(v: any) { };
|
||||
// ^^^^^
|
||||
}
|
||||
|
||||
class D extends C<any> {
|
||||
// ^^^^^
|
||||
override method(...args): any { }
|
||||
// ^^^^^^^^ ^^^^^
|
||||
}
|
||||
|
||||
abstract class A {
|
||||
// ^^^^^^^^
|
||||
abstract a;
|
||||
// ^^^^^^^^^^^ abstract property
|
||||
b;
|
||||
abstract method();
|
||||
// ^^^^^^^^^^^^^^^^^^ abstract method
|
||||
}
|
||||
|
||||
{
|
||||
let m = new (Map!)<string, number>([]!);
|
||||
// ^ ^^^^^^^^^^^^^^^^ ^
|
||||
}
|
||||
|
||||
{
|
||||
let a = (foo!)<any>;
|
||||
// ^ ^^^^^
|
||||
}
|
||||
|
||||
{
|
||||
let a = (foo!)<any>([]!);
|
||||
// ^ ^^^^^ ^
|
||||
}
|
||||
|
||||
{
|
||||
let f = function (p: any) { }
|
||||
// ^^^^^
|
||||
}
|
||||
|
||||
{
|
||||
function overload(): number;
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ overload
|
||||
function overload(): any { }
|
||||
// ^^^^^
|
||||
}
|
||||
|
||||
/** @doc */
|
||||
interface I { }
|
||||
// ^^^^^^^^^^^ interface
|
||||
|
||||
void 0;
|
||||
|
||||
/** @doc */
|
||||
type J = I;
|
||||
// ^^^^^^^^ type alias
|
||||
|
||||
/**/import type T from "node:assert";
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `import type`
|
||||
|
||||
/**/export type { I };
|
||||
// ^^^^^^^^^^^^^^^^^^ `export type`
|
||||
|
||||
/**/export type * from "node:buffer";
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `export type *`
|
||||
|
||||
import { type AssertPredicate/**/, deepEqual } from "node:assert";
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
export {
|
||||
C,
|
||||
type T,
|
||||
// ^^^^^^
|
||||
}
|
||||
|
||||
/**/export type T2 = 1;
|
||||
// ^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
function foo<T>(p: any = (): any => 1): any {
|
||||
// ^^^ ^^^^^ ^^^^^ ^^^^^
|
||||
return p as any;
|
||||
// ^^^^^^
|
||||
}
|
||||
|
||||
/**/declare enum E1 { }
|
||||
// ^^^^^^^^^^^^^^^^^^ `declare enum`
|
||||
|
||||
void 0;
|
||||
|
||||
/**/declare namespace N { }
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^ `declare namespace`
|
||||
|
||||
void 0;
|
||||
|
||||
/**/declare module M { }
|
||||
// ^^^^^^^^^^^^^^^^^^^ `declare module`
|
||||
|
||||
void 0;
|
||||
|
||||
/**/declare let a;
|
||||
// ^^^^^^^^^^^^^^ `declare let`
|
||||
|
||||
void 0;
|
||||
|
||||
/**/declare class DeclaredClass { }
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `declare class`
|
||||
|
||||
void 0;
|
||||
|
||||
/**/declare function DeclaredFunction(): void;
|
||||
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `declare function`
|
||||
|
||||
void 0;
|
||||
|
||||
// `=>` spanning line cases:
|
||||
{
|
||||
()
|
||||
: any =>
|
||||
1
|
||||
};
|
||||
{
|
||||
():
|
||||
any =>
|
||||
1
|
||||
};
|
||||
{
|
||||
(
|
||||
)
|
||||
: any =>
|
||||
1
|
||||
};
|
||||
{
|
||||
(
|
||||
): (
|
||||
| any
|
||||
) =>
|
||||
1
|
||||
};
|
||||
{
|
||||
(
|
||||
):
|
||||
NonNullable<any
|
||||
> =>
|
||||
1
|
||||
};
|
||||
{
|
||||
(a, b, c: D = [] as any/*comment-1*/)/*comment-2*/:
|
||||
any =>
|
||||
1
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user