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Backwards-compatible support for keyword arguments in the command syntax

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This commit is contained in:
Zahary Karadjov
2018-04-29 13:30:08 +03:00
committed by Andreas Rumpf
parent e678a4285d
commit b0d85b0adf
3 changed files with 19 additions and 7 deletions
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17
compiler/parser.nim
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@@ -702,10 +702,17 @@ proc namedParams(p: var TParser, callee: PNode,
# progress guaranteed
exprColonEqExprListAux(p, endTok, result)
proc commandParam(p: var TParser): PNode =
proc commandParam(p: var TParser, isFirstParam: var bool): PNode =
result = parseExpr(p)
if p.tok.tokType == tkDo:
result = postExprBlocks(p, result)
elif p.tok.tokType == tkEquals and not isFirstParam:
let lhs = result
result = newNodeP(nkExprEqExpr, p)
getTok(p)
addSon(result, lhs)
addSon(result, parseExpr(p))
isFirstParam = false
proc primarySuffix(p: var TParser, r: PNode, baseIndent: int): PNode =
#| primarySuffix = '(' (exprColonEqExpr comma?)* ')' doBlocks?
@@ -748,10 +755,11 @@ proc primarySuffix(p: var TParser, r: PNode, baseIndent: int): PNode =
let a = result
result = newNodeP(nkCommand, p)
addSon(result, a)
var isFirstParam = true
when true:
# progress NOT guaranteed
p.hasProgress = false
addSon result, commandParam(p)
addSon result, commandParam(p, isFirstParam)
if not p.hasProgress: break
else:
while p.tok.tokType != tkEof:
@@ -1303,17 +1311,18 @@ proc parseExprStmt(p: var TParser): PNode =
addSon(result, b)
else:
# simpleExpr parsed 'p a' from 'p a, b'?
var isFirstParam = false
if p.tok.indent < 0 and p.tok.tokType == tkComma and a.kind == nkCommand:
result = a
while true:
getTok(p)
optInd(p, result)
addSon(result, commandParam(p))
addSon(result, commandParam(p, isFirstParam))
if p.tok.tokType != tkComma: break
elif p.tok.indent < 0 and isExprStart(p):
result = newNode(nkCommand, a.info, @[a])
while true:
addSon(result, commandParam(p))
addSon(result, commandParam(p, isFirstParam))
if p.tok.tokType != tkComma: break
getTok(p)
optInd(p, result)