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author | Adriaan Moors <adriaan.moors@typesafe.com> | 2013-03-17 22:00:25 -0700 |
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committer | Adriaan Moors <adriaan.moors@typesafe.com> | 2013-03-17 22:00:25 -0700 |
commit | 44af7449d137467079a610f6a702dc10a1fc9472 (patch) | |
tree | 4ec138144edeef4e5ac4144894897638c5d8ab73 /src | |
parent | b7b4f877326acd6a8a24ff60fa1638cc18143c45 (diff) | |
parent | 6e79370294777421d6f01b8a635e71dc0e2454d6 (diff) | |
download | scala-44af7449d137467079a610f6a702dc10a1fc9472.tar.gz scala-44af7449d137467079a610f6a702dc10a1fc9472.tar.bz2 scala-44af7449d137467079a610f6a702dc10a1fc9472.zip |
Merge pull request #2247 from retronym/ticket/7232-2
SI-7232 Fix Java import vs defn. binding precendence
Diffstat (limited to 'src')
-rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/Namers.scala | 8 | ||||
-rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/Typers.scala | 20 |
2 files changed, 26 insertions, 2 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/Namers.scala b/src/compiler/scala/tools/nsc/typechecker/Namers.scala index 7a3ab00578..379f56521b 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Namers.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Namers.scala @@ -516,7 +516,13 @@ trait Namers extends MethodSynthesis { // Setting the position at the import means that if there is // more than one hidden name, the second will not be warned. // So it is the position of the actual hidden name. - checkNotRedundant(tree.pos withPoint fromPos, from, to) + // + // Note: java imports have precence over definitions in the same package + // so don't warn for them. There is a corresponding special treatment + // in the shadowing rules in typedIdent to (SI-7232). In any case, + // we shouldn't be emitting warnings for .java source files. + if (!context.unit.isJava) + checkNotRedundant(tree.pos withPoint fromPos, from, to) } } diff --git a/src/compiler/scala/tools/nsc/typechecker/Typers.scala b/src/compiler/scala/tools/nsc/typechecker/Typers.scala index d8493d2312..93d24996eb 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Typers.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Typers.scala @@ -5046,7 +5046,25 @@ trait Typers extends Modes with Adaptations with Tags { else cx.depth - (cx.scope.nestingLevel - defEntry.owner.nestingLevel) var impSym: Symbol = NoSymbol // the imported symbol var imports = context.imports // impSym != NoSymbol => it is imported from imports.head - while (!reallyExists(impSym) && !imports.isEmpty && imports.head.depth > symDepth) { + + // Java: A single-type-import declaration d in a compilation unit c of package p + // that imports a type named n shadows, throughout c, the declarations of: + // + // 1) any top level type named n declared in another compilation unit of p + // + // A type-import-on-demand declaration never causes any other declaration to be shadowed. + // + // Scala: Bindings of different kinds have a precedence defined on them: + // + // 1) Definitions and declarations that are local, inherited, or made available by a + // package clause in the same compilation unit where the definition occurs have + // highest precedence. + // 2) Explicit imports have next highest precedence. + def depthOk(imp: ImportInfo) = ( + imp.depth > symDepth + || (unit.isJava && imp.isExplicitImport(name) && imp.depth == symDepth) + ) + while (!reallyExists(impSym) && !imports.isEmpty && depthOk(imports.head)) { impSym = imports.head.importedSymbol(name) if (!impSym.exists) imports = imports.tail } |