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macros and templates can be expanded anywhere where a type is expected.

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This allows for various type selection algorithms to be implemented.
See tests / accept / compile / ttypeselectors.nim for examples.
This commit is contained in:
Zahary Karadjov 2011-11-16 02:18:10 +02:00
commit 12bac28d23
6 changed files with 119 additions and 36 deletions
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20
compiler/sem.nim
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@ -64,6 +64,15 @@ proc ParamsTypeCheck(c: PContext, typ: PType) {.inline.} =
if not typeAllowed(typ, skConst):
GlobalError(typ.n.info, errXisNoType, typeToString(typ))
proc expectMacroOrTemplateCall(c: PContext, n: PNode): PSym
proc semTemplateExpr(c: PContext, n: PNode, s: PSym, semCheck = true): PNode
proc semMacroExpr(c: PContext, n: PNode, sym: PSym,
semCheck: bool = true): PNode
proc semWhen(c: PContext, n: PNode, semCheck: bool = true): PNode
include semtempl
proc semConstExpr(c: PContext, n: PNode): PNode =
@ -92,13 +101,16 @@ include seminst, semcall
proc semAfterMacroCall(c: PContext, n: PNode, s: PSym): PNode =
result = n
case s.typ.sons[0].kind
of tyExpr:
of tyExpr:
# BUGFIX: we cannot expect a type here, because module aliases would not
# work then (see the ``tmodulealias`` test)
# semExprWithType(c, result)
result = semExpr(c, result)
of tyStmt: result = semStmt(c, result)
of tyTypeDesc: result.typ = semTypeNode(c, result, nil)
result = semExpr(c, result)
of tyStmt:
result = semStmt(c, result)
of tyTypeDesc:
if n.kind == nkStmtList: result.kind = nkStmtListType
result.typ = semTypeNode(c, result, nil)
else:
result = semExpr(c, result)
result = fitNode(c, s.typ.sons[0], result)