diff options
Diffstat (limited to 'src/compiler')
| -rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/Typers.scala | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/Typers.scala b/src/compiler/scala/tools/nsc/typechecker/Typers.scala index 88b9b2c71c..3343ee2bcc 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Typers.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Typers.scala @@ -4876,25 +4876,30 @@ trait Typers extends Adaptations with Tags with TypersTracking with PatternTyper case Apply(fn, _) => fn.symbol.enclClass == ImplicitNotFoundClass case _ => false } + def warnAbout(s: String) = { + def names = InterpolatorIdentRegex findAllIn s map (n => TermName(n stripPrefix "$")) + def isSuspiciousExpr = (InterpolatorCodeRegex findFirstIn s).nonEmpty + //def isSuspiciousName = names exists (lookUp _ andThen (_.exists)) + def suspiciousName = names find (lookUp _ andThen (_.exists)) + def lookUp(n: TermName) = context.lookupSymbol(n, !_.alternatives.exists(symRequiresArg)).symbol + def symRequiresArg(s: Symbol) = ( + s.paramss.nonEmpty + && (s.paramss.head.headOption filterNot (_.isImplicit)).isDefined + ) + val suggest = "Did you forget the interpolator?" + if (isSuspiciousExpr) + unit.warning(tree.pos, s"That looks like an interpolated expression! $suggest") + else /* if (isSuspiciousName) */ suspiciousName foreach (n => + unit.warning(tree.pos, s"`$$$n` looks like an interpolated identifier! $suggest") + ) + } tree.value match { case Constant(s: String) => - def names = InterpolatorIdentRegex findAllIn s map (n => TermName(n stripPrefix "$")) - def isSuspiciousExpr = (InterpolatorCodeRegex findFirstIn s).nonEmpty - //def isSuspiciousName = names exists symExists - def suspiciousName = names find symExists - def symExists(n: TermName) = context.lookupSymbol(n, _ => true).symbol.exists val noWarn = ( isArgToImplicitNotFound || !(s contains ' ') // another heuristic - e.g. a string with only "$asInstanceOf" ) - if (!noWarn) { - val suggest = "Did you forget the interpolator?" - if (isSuspiciousExpr) - unit.warning(tree.pos, s"That looks like an interpolated expression! $suggest") - else /* if (isSuspiciousName) */ suspiciousName foreach (n => - unit.warning(tree.pos, s"`$$$n` looks like an interpolated identifier! $suggest") - ) - } + if (!noWarn) warnAbout(s) case _ => } } |