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author | Eugene Burmako <xeno.by@gmail.com> | 2013-12-09 09:45:31 +0100 |
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committer | Eugene Burmako <xeno.by@gmail.com> | 2013-12-30 19:07:05 +0300 |
commit | 87913661e199e3894190b7b8aa0900d7237feec0 (patch) | |
tree | db22c710438c8f2cf35886b8014456a911a25855 /test | |
parent | 4d92aec651def608628a2275e1b6bf2d1fcbabe7 (diff) | |
download | scala-87913661e199e3894190b7b8aa0900d7237feec0.tar.gz scala-87913661e199e3894190b7b8aa0900d7237feec0.tar.bz2 scala-87913661e199e3894190b7b8aa0900d7237feec0.zip |
hooks for naming and synthesis in Namers.scala and Typers.scala
Interestingly enough, despite of the implementation surface being
quite noticeable, it is enough to hijack just `enterSym` and typechecking
of stats for packages, templates and blocks in order to enable macro annotations.
That and `ensureCompanionObject`, which I couldn't abstract away so far.
An architectural note: given that a hooked method is called `X`,
there are two implementations of this method. `pluginsX` is defined in
AnalyzerPlugins.scala and lets macro plugins customize `X`.
`standardX` is defined next to `X` and provides a default implementation.
Finally `X` is changed to trivially forward to `pluginsX`.
Existing and future callers of `X` now can be completely oblivious of the
introduced hooks, because calls to `X` will continue working and will be
correctly hooked. This makes the infrastructure more robust.
The only downside is that in case when a macro plugin wants to call
into the default implementation, it needs to call `standardX`, because
`X` will lead to a stack overflow. However, in my opinion this not a big
problem, because such failures are load and clear + for every `pluginsX`
we actually provide documentation that says what is its standard impl is.
Diffstat (limited to 'test')
4 files changed, 5 insertions, 5 deletions
diff --git a/test/files/neg/macro-incompatible-macro-engine/Plugin_1.scala b/test/files/neg/macro-incompatible-macro-engine/Plugin_1.scala index a450573755..44ed91d2fb 100644 --- a/test/files/neg/macro-incompatible-macro-engine/Plugin_1.scala +++ b/test/files/neg/macro-incompatible-macro-engine/Plugin_1.scala @@ -25,7 +25,7 @@ class Plugin(val global: Global) extends NscPlugin { }.transform(tree) override def pluginsTypedMacroBody(typer: Typer, ddef: DefDef): Option[Tree] = { - val result = typedMacroBody(typer, ddef) + val result = standardTypedMacroBody(typer, ddef) val List(AnnotationInfo(atp, List(Apply(nucleus, _ :: others)), Nil)) = ddef.symbol.annotations val updatedBinding = Apply(nucleus, Assign(Literal(Constant("macroEngine")), Literal(Constant("vxxx (implemented in the incompatibleMacroEngine plugin)"))) :: others) ddef.symbol.setAnnotations(List(AnnotationInfo(atp, List(fixupBinding(updatedBinding)), Nil))) diff --git a/test/files/run/macroPlugins-macroArgs/Plugin_1.scala b/test/files/run/macroPlugins-macroArgs/Plugin_1.scala index 04cedbdc64..23e80ced3b 100644 --- a/test/files/run/macroPlugins-macroArgs/Plugin_1.scala +++ b/test/files/run/macroPlugins-macroArgs/Plugin_1.scala @@ -14,7 +14,7 @@ class Plugin(val global: Global) extends NscPlugin { object MacroPlugin extends MacroPlugin { override def pluginsMacroArgs(typer: Typer, expandee: Tree): Option[MacroArgs] = { - val MacroArgs(c, List(Literal(Constant(s: String)))) = macroArgs(typer, expandee) + val MacroArgs(c, List(Literal(Constant(s: String)))) = standardMacroArgs(typer, expandee) Some(MacroArgs(c, List(Literal(Constant("hijacked " + s))))) } } diff --git a/test/files/run/macroPlugins-namerHooks.scala b/test/files/run/macroPlugins-namerHooks.scala index b0f29cbbed..a71d685f7f 100644 --- a/test/files/run/macroPlugins-namerHooks.scala +++ b/test/files/run/macroPlugins-namerHooks.scala @@ -18,12 +18,12 @@ object Test extends DirectTest { object macroPlugin extends MacroPlugin { override def pluginsEnterSym(namer: Namer, tree: Tree): Boolean = { output += s"enterSym(${tree.toString.replace('\n', ' ')})" - namer.enterSym(tree) + namer.standardEnterSym(tree) true } override def pluginsEnsureCompanionObject(namer: Namer, cdef: ClassDef, creator: ClassDef => Tree = companionModuleDef(_)): Option[Symbol] = { output += s"ensureCompanionObject(${cdef.toString.replace('\n', ' ')}, ...)" - Some(namer.ensureCompanionObject(cdef, creator)) + Some(namer.standardEnsureCompanionObject(cdef, creator)) } override def pluginsEnterStats(typer: Typer, stats: List[Tree]): List[Tree] = { stats.foreach(stat => output += s"enterStat(${stat.toString.replace('\n', ' ')})") diff --git a/test/files/run/macroPlugins-typedMacroBody/Plugin_1.scala b/test/files/run/macroPlugins-typedMacroBody/Plugin_1.scala index 4632c36ef5..e99cf7f75d 100644 --- a/test/files/run/macroPlugins-typedMacroBody/Plugin_1.scala +++ b/test/files/run/macroPlugins-typedMacroBody/Plugin_1.scala @@ -15,7 +15,7 @@ class Plugin(val global: Global) extends NscPlugin { object MacroPlugin extends MacroPlugin { override def pluginsTypedMacroBody(typer: Typer, ddef: DefDef): Option[Tree] = { val DefDef(_, _, _, _, _, Literal(Constant(num: Int))) = ddef - Some(typedMacroBody(typer, copyDefDef(ddef)(rhs = Ident(TermName("impl" + num))))) + Some(standardTypedMacroBody(typer, copyDefDef(ddef)(rhs = Ident(TermName("impl" + num))))) } } }
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