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implemented 'let' statement

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This commit is contained in:
Araq 2011-11-29 17:27:48 +01:00
commit 7fcbdc6d42
33 changed files with 169 additions and 103 deletions
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6
compiler/transf.nim
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@ -294,7 +294,7 @@ proc introduceNewLocalVars(c: PTransf, n: PNode): PTransNode =
of nkEmpty..pred(nkSym), succ(nkSym)..nkNilLit:
# nothing to be done for leaves:
result = PTransNode(n)
of nkVarSection:
of nkVarSection, nkLetSection:
result = transformVarSection(c, n)
else:
result = newTransNode(n)
@ -518,7 +518,7 @@ proc gatherVars(c: PTransf, n: PNode, marked: var TIntSet, owner: PSym,
var s = n.sym
var found = false
case s.kind
of skVar: found = sfGlobal notin s.flags
of skVar, skLet: found = sfGlobal notin s.flags
of skTemp, skForVar, skParam, skResult: found = true
else: nil
if found and owner.id != s.owner.id and not ContainsOrIncl(marked, s.id):
@ -714,7 +714,7 @@ proc transform(c: PTransf, n: PNode): PTransNode =
of nkConstSection:
# do not replace ``const c = 3`` with ``const 3 = 3``
return transformConstSection(c, n)
of nkVarSection:
of nkVarSection, nkLetSection:
if c.inlining > 0:
# we need to copy the variables for multiple yield statements:
result = transformVarSection(c, n)