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badb6c0f66
* can be stored in constants and variables (including in containers like sequences) * can be passed to and returned from macros
91 lines
3.0 KiB
Nim
91 lines
3.0 KiB
Nim
#
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#
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# The Nimrod Compiler
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# (c) Copyright 2012 Andreas Rumpf
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#
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# See the file "copying.txt", included in this
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# distribution, for details about the copyright.
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#
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# This include file implements the semantic checking for magics.
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# included from sem.nim
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proc semIsPartOf(c: PContext, n: PNode, flags: TExprFlags): PNode =
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var r = isPartOf(n[1], n[2])
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result = newIntNodeT(ord(r), n)
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proc expectIntLit(c: PContext, n: PNode): int =
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let x = c.semConstExpr(c, n)
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case x.kind
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of nkIntLit..nkInt64Lit: result = int(x.intVal)
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else: LocalError(n.info, errIntLiteralExpected)
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proc semInstantiationInfo(c: PContext, n: PNode): PNode =
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result = newNodeIT(nkPar, n.info, n.typ)
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let idx = expectIntLit(c, n.sons[1])
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let info = getInfoContext(idx)
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var filename = newNodeIT(nkStrLit, n.info, getSysType(tyString))
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filename.strVal = ToFilename(info)
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var line = newNodeIT(nkIntLit, n.info, getSysType(tyInt))
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line.intVal = ToLinenumber(info)
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result.add(filename)
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result.add(line)
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proc semTypeTraits(c: PContext, n: PNode): PNode =
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checkMinSonsLen(n, 2)
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internalAssert n.sons[1].kind == nkSym
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let typArg = n.sons[1].sym
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if typArg.kind == skType or
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(typArg.kind == skParam and typArg.typ.sonsLen > 0):
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# This is either a type known to sem or a typedesc
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# param to a regular proc (again, known at instantiation)
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result = evalTypeTrait(n, GetCurrOwner())
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else:
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# a typedesc variable, pass unmodified to evals
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result = n
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proc semOrd(c: PContext, n: PNode): PNode =
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result = n
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result.typ = makeRangeType(c, firstOrd(n.sons[1].typ),
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lastOrd(n.sons[1].typ), n.info)
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proc semBindSym(c: PContext, n: PNode): PNode =
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result = copyNode(n)
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result.add(n.sons[0])
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let sl = semConstExpr(c, n.sons[1])
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if sl.kind notin {nkStrLit, nkRStrLit, nkTripleStrLit}:
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LocalError(n.sons[1].info, errStringLiteralExpected)
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return errorNode(c, n)
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let isMixin = semConstExpr(c, n.sons[2])
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if isMixin.kind != nkIntLit or isMixin.intVal < 0 or
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isMixin.intVal > high(TSymChoiceRule).int:
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LocalError(n.sons[2].info, errConstExprExpected)
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return errorNode(c, n)
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let id = newIdentNode(getIdent(sl.strVal), n.info)
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let s = QualifiedLookUp(c, id)
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if s != nil:
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# we need to mark all symbols:
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var sc = symChoice(c, id, s, TSymChoiceRule(isMixin.intVal))
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result.add(sc)
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else:
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LocalError(n.sons[1].info, errUndeclaredIdentifier, sl.strVal)
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proc semShallowCopy(c: PContext, n: PNode, flags: TExprFlags): PNode
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proc magicsAfterOverloadResolution(c: PContext, n: PNode,
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flags: TExprFlags): PNode =
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case n[0].sym.magic
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of mIsPartOf: result = semIsPartOf(c, n, flags)
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of mTypeTrait: result = semTypeTraits(c, n)
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of mAstToStr:
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result = newStrNodeT(renderTree(n[1], {renderNoComments}), n)
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result.typ = getSysType(tyString)
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of mInstantiationInfo: result = semInstantiationInfo(c, n)
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of mOrd: result = semOrd(c, n)
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of mShallowCopy: result = semShallowCopy(c, n, flags)
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of mNBindSym: result = semBindSym(c, n)
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else: result = n
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