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Support f"" macro when -Xignore-scala2-macros is on #6766

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Merged
merged 1 commit into from
Jun 28, 2019
Merged

Support f"" macro when -Xignore-scala2-macros is on #6766

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14 changes: 7 additions & 7 deletions compiler/src/dotty/tools/dotc/typer/Typer.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -2817,20 +2817,20 @@ class Typer extends Namer
readaptSimplified(Inliner.inlineCall(tree))
}
else if (tree.symbol.isScala2Macro) {
if (ctx.settings.XignoreScala2Macros.value) {
ctx.warning("Scala 2 macro cannot be used in Dotty, this call will crash at runtime. See http://dotty.epfl.ch/docs/reference/dropped-features/macros.html", tree.sourcePos.startPos)
Throw(New(defn.MatchErrorType, Literal(Constant(s"Reached unexpanded Scala 2 macro call to ${tree.symbol.showFullName} compiled with -Xignore-scala2-macros.")) :: Nil))
.withType(tree.tpe)
.withSpan(tree.span)
} else if (tree.symbol eq defn.StringContext_f) {
if (tree.symbol eq defn.StringContext_f) {
// As scala.StringContext.f is defined in the standard library which
// we currently do not bootstrap we cannot implement the macro the library.
// we currently do not bootstrap we cannot implement the macro in the library.
// To overcome the current limitation we intercept the call and rewrite it into
// a call to dotty.internal.StringContext.f which we can implement using the new macros.
// As the macro is implemented in the bootstrapped library, it can only be used from the bootstrapped compiler.
val Apply(TypeApply(Select(sc, _), _), args) = tree
val newCall = ref(defn.InternalStringContextMacroModule_f).appliedTo(sc).appliedToArgs(args)
readaptSimplified(Inliner.inlineCall(newCall))
} else if (ctx.settings.XignoreScala2Macros.value) {
ctx.warning("Scala 2 macro cannot be used in Dotty, this call will crash at runtime. See http://dotty.epfl.ch/docs/reference/dropped-features/macros.html", tree.sourcePos.startPos)
Throw(New(defn.MatchErrorType, Literal(Constant(s"Reached unexpanded Scala 2 macro call to ${tree.symbol.showFullName} compiled with -Xignore-scala2-macros.")) :: Nil))
.withType(tree.tpe)
.withSpan(tree.span)
} else {
ctx.error(
"""Scala 2 macro cannot be used in Dotty. See http://dotty.epfl.ch/docs/reference/dropped-features/macros.html\n"
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