diff options
Diffstat (limited to 'src/compiler/scala/tools/nsc/ast/parser/Parsers.scala')
| -rw-r--r-- | src/compiler/scala/tools/nsc/ast/parser/Parsers.scala | 79 |
1 files changed, 47 insertions, 32 deletions
diff --git a/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala b/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala index d7bfcfc314..fe6dcc9138 100644 --- a/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala +++ b/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala @@ -28,14 +28,17 @@ trait ParsersCommon extends ScannersCommon { val global : Global import global._ - trait ParserCommon { + /** This is now an abstract class, only to work around the optimizer: + * methods in traits are never inlined. + */ + abstract class ParserCommon { val in: ScannerCommon def freshName(prefix: String): Name def freshTermName(prefix: String): TermName def freshTypeName(prefix: String): TypeName def deprecationWarning(off: Int, msg: String): Unit def accept(token: Int): Int - + /** Methods inParensOrError and similar take a second argument which, should * the next token not be the expected opener (e.g. LPAREN) will be returned * instead of the contents of the groupers. However in all cases accept(LPAREN) @@ -123,8 +126,6 @@ self => val global: Global import global._ - private val glob: global.type = global - case class OpInfo(operand: Tree, operator: Name, offset: Offset) class SourceFileParser(val source: SourceFile) extends Parser { @@ -616,7 +617,7 @@ self => def isLiteralToken(token: Int) = token match { case CHARLIT | INTLIT | LONGLIT | FLOATLIT | DOUBLELIT | - STRINGLIT | STRINGPART | SYMBOLLIT | TRUE | FALSE | NULL => true + STRINGLIT | INTERPOLATIONID | SYMBOLLIT | TRUE | FALSE | NULL => true case _ => false } def isLiteral = isLiteralToken(in.token) @@ -1102,7 +1103,7 @@ self => * }}} * @note The returned tree does not yet have a position */ - def literal(isNegated: Boolean): Tree = { + def literal(isNegated: Boolean = false): Tree = { def finish(value: Any): Tree = { val t = Literal(Constant(value)) in.nextToken() @@ -1110,19 +1111,19 @@ self => } if (in.token == SYMBOLLIT) Apply(scalaDot(nme.Symbol), List(finish(in.strVal))) - else if (in.token == STRINGPART) + else if (in.token == INTERPOLATIONID) interpolatedString() else finish(in.token match { - case CHARLIT => in.charVal - case INTLIT => in.intVal(isNegated).toInt - case LONGLIT => in.intVal(isNegated) - case FLOATLIT => in.floatVal(isNegated).toFloat - case DOUBLELIT => in.floatVal(isNegated) - case STRINGLIT => in.strVal.intern() - case TRUE => true - case FALSE => false - case NULL => null - case _ => + case CHARLIT => in.charVal + case INTLIT => in.intVal(isNegated).toInt + case LONGLIT => in.intVal(isNegated) + case FLOATLIT => in.floatVal(isNegated).toFloat + case DOUBLELIT => in.floatVal(isNegated) + case STRINGLIT | STRINGPART => in.strVal.intern() + case TRUE => true + case FALSE => false + case NULL => null + case _ => syntaxErrorOrIncomplete("illegal literal", true) null }) @@ -1137,16 +1138,27 @@ self => } } - private def interpolatedString(): Tree = { - var t = atPos(o2p(in.offset))(New(TypeTree(definitions.StringBuilderClass.tpe), List(List()))) + private def interpolatedString(): Tree = atPos(in.offset) { + val start = in.offset + val interpolator = in.name + + val partsBuf = new ListBuffer[Tree] + val exprBuf = new ListBuffer[Tree] + in.nextToken() while (in.token == STRINGPART) { - t = stringOp(t, nme.append) - var e = expr() - if (in.token == STRINGFMT) e = stringOp(e, nme.formatted) - t = atPos(t.pos.startOrPoint)(Apply(Select(t, nme.append), List(e))) + partsBuf += literal() + exprBuf += { + if (in.token == IDENTIFIER) atPos(in.offset)(Ident(ident())) + else expr() + } } - if (in.token == STRINGLIT) t = stringOp(t, nme.append) - atPos(t.pos)(Select(t, nme.toString_)) + if (in.token == STRINGLIT) partsBuf += literal() + + val t1 = atPos(o2p(start)) { Ident(nme.StringContext) } + val t2 = atPos(start) { Apply(t1, partsBuf.toList) } + t2 setPos t2.pos.makeTransparent + val t3 = Select(t2, interpolator) setPos t2.pos + atPos(start) { Apply(t3, exprBuf.toList) } } /* ------------- NEW LINES ------------------------------------------------- */ @@ -1468,7 +1480,7 @@ self => atPos(in.offset) { val name = nme.toUnaryName(rawIdent()) // val name = nme.toUnaryName(ident()) // val name: Name = "unary_" + ident() - if (name == nme.UNARY_- && isNumericLit) simpleExprRest(atPos(in.offset)(literal(true)), true) + if (name == nme.UNARY_- && isNumericLit) simpleExprRest(atPos(in.offset)(literal(isNegated = true)), true) else Select(stripParens(simpleExpr()), name) } } @@ -1492,7 +1504,7 @@ self => def simpleExpr(): Tree = { var canApply = true val t = - if (isLiteral) atPos(in.offset)(literal(false)) + if (isLiteral) atPos(in.offset)(literal()) else in.token match { case XMLSTART => xmlLiteral() @@ -1826,7 +1838,7 @@ self => case INTLIT | LONGLIT | FLOATLIT | DOUBLELIT => t match { case Ident(nme.MINUS) => - return atPos(start) { literal(true) } + return atPos(start) { literal(isNegated = true) } case _ => } case _ => @@ -1843,8 +1855,8 @@ self => in.nextToken() atPos(start, start) { Ident(nme.WILDCARD) } case CHARLIT | INTLIT | LONGLIT | FLOATLIT | DOUBLELIT | - STRINGLIT | STRINGPART | SYMBOLLIT | TRUE | FALSE | NULL => - atPos(start) { literal(false) } + STRINGLIT | INTERPOLATIONID | SYMBOLLIT | TRUE | FALSE | NULL => + atPos(start) { literal() } case LPAREN => atPos(start)(makeParens(noSeq.patterns())) case XMLSTART => @@ -2437,7 +2449,7 @@ self => else { val nameOffset = in.offset val name = ident() - if (name == nme.macro_ && isIdent && settings.Xexperimental.value) + if (name == nme.macro_ && isIdent && settings.Xmacros.value) funDefRest(start, in.offset, mods | Flags.MACRO, ident()) else funDefRest(start, nameOffset, mods, name) @@ -2468,6 +2480,9 @@ self => restype = scalaUnitConstr blockExpr() } else { + if (name == nme.macro_ && isIdent && in.token != EQUALS) { + warning("this syntactically invalid code resembles a macro definition. have you forgotten to enable -Xmacros?") + } equalsExpr() } DefDef(newmods, name, tparams, vparamss, restype, rhs) @@ -2527,7 +2542,7 @@ self => newLinesOpt() atPos(start, in.offset) { val name = identForType() - if (name == nme.macro_.toTypeName && isIdent && settings.Xexperimental.value) { + if (name == nme.macro_.toTypeName && isIdent && settings.Xmacros.value) { funDefRest(start, in.offset, mods | Flags.MACRO, identForType()) } else { // @M! a type alias as well as an abstract type may declare type parameters |