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use 'using' instead of 'sig' keyword; cleans up new features a bit

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This commit is contained in:
Andreas Rumpf 2016-02-29 12:19:54 +01:00
commit c9966a3e17
20 changed files with 109 additions and 74 deletions
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9
compiler/semstmts.nim
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@ -386,8 +386,11 @@ proc isDiscardUnderscore(v: PSym): bool =
v.flags.incl(sfGenSym)
result = true
proc semSigSection(c: PContext; n: PNode): PNode =
proc semUsing(c: PContext; n: PNode): PNode =
result = ast.emptyNode
if not isTopLevel(c): localError(n.info, errXOnlyAtModuleScope, "using")
if not experimentalMode(c):
localError(n.info, "use the {.experimental.} pragma to enable 'using'")
for i in countup(0, sonsLen(n)-1):
var a = n.sons[i]
if gCmd == cmdIdeTools: suggestStmt(c, a)
@ -402,10 +405,10 @@ proc semSigSection(c: PContext; n: PNode): PNode =
v.typ = typ
strTableIncl(c.signatures, v)
else:
localError(a.info, "'sig' section must have a type")
localError(a.info, "'using' section must have a type")
var def: PNode
if a.sons[length-1].kind != nkEmpty:
localError(a.info, "'sig' sections cannot contain assignments")
localError(a.info, "'using' sections cannot contain assignments")
proc semVarOrLet(c: PContext, n: PNode, symkind: TSymKind): PNode =
var b: PNode