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Printer improvements to fuse JS emitting and printing #4920

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Merged
merged 9 commits into from
Jan 28, 2024
Merged

Printer improvements to fuse JS emitting and printing #4920

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e55b624
Basic tests for javascript.Printers
gzm0 Dec 28, 2023
c2ed2bb
Print semicolon as part of statement in javascript Printer
gzm0 Dec 25, 2023
197af9a
Do not print skip's in blocks
gzm0 Dec 28, 2023
7c3797d
Do not abuse a block to group instance tests
gzm0 Dec 28, 2023
bdea4d7
Do not abuse a block to group const field export statements
gzm0 Dec 29, 2023
135932a
Simplify printTopLevelTree in JS printer
gzm0 Dec 28, 2023
de0d65c
Restrict visibility of JS Printer methods
gzm0 Dec 29, 2023
bd58bbb
Print trailing newline as part of statement
gzm0 Dec 29, 2023
cae909a
Remove printTopLevelTree and replace it with printStat
gzm0 Dec 29, 2023
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4 changes: 2 additions & 2 deletions linker/shared/src/main/scala/org/scalajs/linker/backend/BasicLinkerBackend.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -283,7 +283,7 @@ private object BasicLinkerBackend {
val jsCodeWriter = new ByteArrayWriter()
val printer = new Printers.JSTreePrinter(jsCodeWriter)

printer.printTopLevelTree(tree)
printer.printStat(tree)

new PrintedTree(jsCodeWriter.toByteArray(), SourceMapWriter.Fragment.Empty)
}
Expand Down Expand Up @@ -321,7 +321,7 @@ private object BasicLinkerBackend {
val smFragmentBuilder = new SourceMapWriter.FragmentBuilder()
val printer = new Printers.JSTreePrinterWithSourceMap(jsCodeWriter, smFragmentBuilder)

printer.printTopLevelTree(tree)
printer.printStat(tree)
smFragmentBuilder.complete()

new PrintedTree(jsCodeWriter.toByteArray(), smFragmentBuilder.result())
Expand Down
18 changes: 9 additions & 9 deletions linker/shared/src/main/scala/org/scalajs/linker/backend/emitter/ClassEmitter.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -683,12 +683,12 @@ private[emitter] final class ClassEmitter(sjsGen: SJSGen) {

def genInstanceTests(className: ClassName, kind: ClassKind)(
implicit moduleContext: ModuleContext,
globalKnowledge: GlobalKnowledge, pos: Position): WithGlobals[js.Tree] = {
globalKnowledge: GlobalKnowledge, pos: Position): WithGlobals[List[js.Tree]] = {
for {
single <- genSingleInstanceTests(className, kind)
array <- genArrayInstanceTests(className)
} yield {
js.Block(single ::: array)
single ::: array
}
}

Expand Down Expand Up @@ -1028,16 +1028,16 @@ private[emitter] final class ClassEmitter(sjsGen: SJSGen) {
case e: TopLevelMethodExportDef =>
genTopLevelMethodExportDef(e)
case e: TopLevelFieldExportDef =>
genTopLevelFieldExportDef(topLevelExport.owningClass, e)
genTopLevelFieldExportDef(topLevelExport.owningClass, e).map(_ :: Nil)
}
}

WithGlobals.list(exportsWithGlobals)
WithGlobals.flatten(exportsWithGlobals)
}

private def genTopLevelMethodExportDef(tree: TopLevelMethodExportDef)(
implicit moduleContext: ModuleContext,
globalKnowledge: GlobalKnowledge): WithGlobals[js.Tree] = {
globalKnowledge: GlobalKnowledge): WithGlobals[List[js.Tree]] = {
import TreeDSL._

val JSMethodDef(flags, StringLiteral(exportName), args, restParam, body) =
Expand All @@ -1056,22 +1056,22 @@ private[emitter] final class ClassEmitter(sjsGen: SJSGen) {

private def genConstValueExportDef(exportName: String,
exportedValue: js.Tree)(
implicit pos: Position): WithGlobals[js.Tree] = {
implicit pos: Position): WithGlobals[List[js.Tree]] = {
moduleKind match {
case ModuleKind.NoModule =>
genAssignToNoModuleExportVar(exportName, exportedValue)
genAssignToNoModuleExportVar(exportName, exportedValue).map(_ :: Nil)

case ModuleKind.ESModule =>
val field = fileLevelVar(VarField.e, exportName)
val let = js.Let(field.ident, mutable = true, Some(exportedValue))
val exportStat = js.Export((field.ident -> js.ExportName(exportName)) :: Nil)
WithGlobals(js.Block(let, exportStat))
WithGlobals(List(let, exportStat))

case ModuleKind.CommonJSModule =>
globalRef("exports").map { exportsVarRef =>
js.Assign(
genBracketSelect(exportsVarRef, js.StringLiteral(exportName)),
exportedValue)
exportedValue) :: Nil
}
}
}
Expand Down
4 changes: 2 additions & 2 deletions linker/shared/src/main/scala/org/scalajs/linker/backend/emitter/Emitter.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -595,7 +595,7 @@ final class Emitter(config: Emitter.Config) {
*/

if (classEmitter.needInstanceTests(linkedClass)(classCache)) {
main += extractWithGlobals(classTreeCache.instanceTests.getOrElseUpdate(
main ++= extractWithGlobals(classTreeCache.instanceTests.getOrElseUpdate(
classEmitter.genInstanceTests(className, kind)(moduleContext, classCache, linkedClass.pos)))
}

Expand Down Expand Up @@ -1035,7 +1035,7 @@ object Emitter {

private final class DesugaredClassCache {
val privateJSFields = new OneTimeCache[WithGlobals[List[js.Tree]]]
val instanceTests = new OneTimeCache[WithGlobals[js.Tree]]
val instanceTests = new OneTimeCache[WithGlobals[List[js.Tree]]]
val typeData = new OneTimeCache[WithGlobals[List[js.Tree]]]
val setTypeData = new OneTimeCache[js.Tree]
val moduleAccessor = new OneTimeCache[WithGlobals[List[js.Tree]]]
Expand Down
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