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slices are first class citizens

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This commit is contained in:
Araq 2011-04-22 10:53:43 +02:00
commit 8dda362fa6
12 changed files with 177 additions and 127 deletions
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19
compiler/semstmts.nim
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@ -339,11 +339,11 @@ proc semConst(c: PContext, n: PNode): PNode =
if a.sons[1].kind != nkEmpty: typ = semTypeNode(c, a.sons[1], nil)
var def = semAndEvalConstExpr(c, a.sons[2])
# check type compability between def.typ and typ:
if (typ != nil):
if typ != nil:
def = fitRemoveHiddenConv(c, typ, def)
else:
else:
typ = def.typ
if not typeAllowed(typ, skConst):
if not typeAllowed(typ, skConst):
GlobalError(a.info, errXisNoType, typeToString(typ))
v.typ = typ
v.ast = def # no need to copy
@ -423,25 +423,12 @@ proc semForFields(c: PContext, n: PNode, m: TMagic): PNode =
var b = newNodeI(nkBreakStmt, n.info)
b.add(ast.emptyNode)
stmts.add(b)
proc createCountupNode(c: PContext, rangeNode: PNode): PNode =
# convert ``in 3..5`` to ``in countup(3, 5)``
checkSonsLen(rangeNode, 2)
result = newNodeI(nkCall, rangeNode.info)
var countUp = StrTableGet(magicsys.systemModule.Tab, getIdent"countup")
if countUp == nil: GlobalError(rangeNode.info, errSystemNeeds, "countup")
newSons(result, 3)
result.sons[0] = newSymNode(countup)
result.sons[1] = rangeNode.sons[0]
result.sons[2] = rangeNode.sons[1]
proc semFor(c: PContext, n: PNode): PNode =
result = n
checkMinSonsLen(n, 3)
var length = sonsLen(n)
openScope(c.tab)
if n.sons[length-2].kind == nkRange:
n.sons[length-2] = createCountupNode(c, n.sons[length-2])
n.sons[length-2] = semExprWithType(c, n.sons[length-2], {efWantIterator})
var call = n.sons[length-2]
if call.kind != nkCall or call.sons[0].kind != nkSym or