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Diffstat (limited to 'rod/procfind.nim')
-rw-r--r-- | rod/procfind.nim | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/rod/procfind.nim b/rod/procfind.nim deleted file mode 100644 index bd5b3841f..000000000 --- a/rod/procfind.nim +++ /dev/null @@ -1,86 +0,0 @@ -# -# -# The Nimrod Compiler -# (c) Copyright 2009 Andreas Rumpf -# -# See the file "copying.txt", included in this -# distribution, for details about the copyright. -# - -# This module implements the searching for procs and iterators. -# This is needed for proper handling of forward declarations. - -import - ast, astalgo, msgs, semdata, types, trees - -proc SearchForProc*(c: PContext, fn: PSym, tos: int): PSym - # Searchs for the fn in the symbol table. If the parameter lists are exactly - # the same the sym in the symbol table is returned, else nil. -proc SearchForBorrowProc*(c: PContext, fn: PSym, tos: int): PSym - # Searchs for the fn in the symbol table. If the parameter lists are suitable - # for borrowing the sym in the symbol table is returned, else nil. -# implementation - -proc equalGenericParams(procA, procB: PNode): bool = - var a, b: PSym - result = procA == procB - if result: return - if (procA == nil) or (procB == nil): return - if sonsLen(procA) != sonsLen(procB): return - for i in countup(0, sonsLen(procA) - 1): - if procA.sons[i].kind != nkSym: - InternalError(procA.info, "equalGenericParams") - if procB.sons[i].kind != nkSym: - InternalError(procB.info, "equalGenericParams") - a = procA.sons[i].sym - b = procB.sons[i].sym - if (a.name.id != b.name.id) or not sameTypeOrNil(a.typ, b.typ): return - if (a.ast != nil) and (b.ast != nil): - if not ExprStructuralEquivalent(a.ast, b.ast): return - result = true - -proc SearchForProc(c: PContext, fn: PSym, tos: int): PSym = - var it: TIdentIter - result = initIdentIter(it, c.tab.stack[tos], fn.Name) - while result != nil: - if (result.Kind == fn.kind): - if equalGenericParams(result.ast.sons[genericParamsPos], - fn.ast.sons[genericParamsPos]): - case equalParams(result.typ.n, fn.typ.n) - of paramsEqual: - return - of paramsIncompatible: - liMessage(fn.info, errNotOverloadable, fn.name.s) - return - of paramsNotEqual: - nil - result = NextIdentIter(it, c.tab.stack[tos]) - -proc paramsFitBorrow(a, b: PNode): bool = - var - length: int - m, n: PSym - length = sonsLen(a) - result = false - if length == sonsLen(b): - for i in countup(1, length - 1): - m = a.sons[i].sym - n = b.sons[i].sym - assert((m.kind == skParam) and (n.kind == skParam)) - if not equalOrDistinctOf(m.typ, n.typ): return - if not equalOrDistinctOf(a.sons[0].typ, b.sons[0].typ): return - result = true - -proc SearchForBorrowProc(c: PContext, fn: PSym, tos: int): PSym = - # Searchs for the fn in the symbol table. If the parameter lists are suitable - # for borrowing the sym in the symbol table is returned, else nil. - var it: TIdentIter - for scope in countdown(tos, 0): - result = initIdentIter(it, c.tab.stack[scope], fn.Name) - while result != nil: - # watchout! result must not be the same as fn! - if (result.Kind == fn.kind) and (result.id != fn.id): - if equalGenericParams(result.ast.sons[genericParamsPos], - fn.ast.sons[genericParamsPos]): - if paramsFitBorrow(fn.typ.n, result.typ.n): return - result = NextIdentIter(it, c.tab.stack[scope]) |