2011/6/15 Axel Rauschmayer <a...@rauschma.de>:
> Quick feedback: I haven’t seen SVE (substitution value expression?) defined
> anywhere and can’t find a description of using ${{var}} as syntactic sugar
> for "{var:${var}}".
SVE is defined in
http://wiki.ecmascript.org/doku.php?id=harmony:quasis#substitution_body_syntax
reproduced below:
SVE
Production Result
QuasiLiteral :: QuasiTag`LiteralPortion QuasiLiteralTail
SVE(QuasiLiteralTail)
QuasiLiteralTail :: Substitution LiteralPortion QuasiLiteralTail
array-concat(single-element-array(SVE(Substitution)),
SVE(QuasiLiteralTail))
QuasiLiteralTail :: ` an empty array
Substitution :: $Identifier PrimaryExpression : Identifier
Substitution :: ${SubstitutionModifier Identifier} PrimaryExpression
SubstitutionBody :: Identifier IdentifierPathTail MemberExpression :
str-concat(SV(Identifier), SV(IdentifierPathTail))
IdentifierPathTail :: .IdentifierName IdentifierPathTail
str-concat(“.”, SV(IdentifierName), SV(IdentifierPathTail))
IdentifierPathTail :: ε the empty string, ““
The SVE of a substitution is an expression that is evaluated in the
scope in which the quasiliteral appears. The SVE of the quasi literal
is the array of the SVE for each substitution.
E.g. the SVE of quasitag`literalPortion0 $x literalPortion1 $y.z
literalPortion2` is [x, y.z].
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