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introduce nkTupleConstr AST node for unary tuple construction; breaking change

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This commit is contained in:
Andreas Rumpf 2018-04-13 17:06:46 +02:00
commit 47335aab41
26 changed files with 91 additions and 56 deletions
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6
compiler/parser.nim
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@ -399,6 +399,9 @@ proc exprColonEqExprListAux(p: var TParser, endTok: TTokType, result: PNode) =
addSon(result, a)
if p.tok.tokType != tkComma: break
getTok(p)
# (1,) produces a tuple expression
if endTok == tkParRi and p.tok.tokType == tkParRi:
result.kind = nkTupleConstr
skipComment(p, a)
optPar(p)
eat(p, endTok)
@ -566,6 +569,9 @@ proc parsePar(p: var TParser): PNode =
if p.tok.tokType == tkComma:
getTok(p)
skipComment(p, a)
# (1,) produces a tuple expression:
if p.tok.tokType == tkParRi:
result.kind = nkTupleConstr
# progress guaranteed
while p.tok.tokType != tkParRi and p.tok.tokType != tkEof:
var a = exprColonEqExpr(p)