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f5930d0bb3
fixes #20811 This pull request addresses issues with parameter capture in nested generic procedures and templates, ensuring that outer parameters are correctly visible and accessible within nested scopes. The main changes include a fix in the semantic analysis logic and the addition of targeted regression tests. ### Semantic analysis improvements: * Updated `semGenericStmtSymbol` in `compiler/semgnrc.nim` to ensure that parameters from outer scopes are preserved and accessible in nested generic procedures, fixing visibility issues with captured parameters. ### Added regression tests: * Added `tests/generics/t20811.nim` to verify that both generic and plain inner procedures can access parameters from their enclosing procedure. * Extended `tests/template/topensym.nim` with a new block for issue #20811 to test that template-injected parameters are correctly captured and visible in nested generic procedures.
685 lines
25 KiB
Nim
685 lines
25 KiB
Nim
#
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#
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# The Nim Compiler
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# (c) Copyright 2015 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 implements the first pass over the generic body; it resolves some
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# symbols. Thus for generics there is a two-phase symbol lookup just like
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# in C++.
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# A problem is that it cannot be detected if the symbol is introduced
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# as in ``var x = ...`` or used because macros/templates can hide this!
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# So we have to eval templates/macros right here so that symbol
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# lookup can be accurate.
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# included from sem.nim
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proc getIdentNode(c: PContext; n: PNode): PNode =
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case n.kind
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of nkPostfix: result = getIdentNode(c, n[1])
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of nkPragmaExpr: result = getIdentNode(c, n[0])
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of nkIdent, nkAccQuoted, nkSym: result = n
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else:
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illFormedAst(n, c.config)
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result = n
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type
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GenericCtx = object
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toMixin, toBind: IntSet
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cursorInBody: bool # only for nimsuggest
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bracketExpr: PNode
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TSemGenericFlag = enum
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withinBind,
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withinTypeDesc,
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withinMixin,
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withinConcept
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TSemGenericFlags = set[TSemGenericFlag]
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proc semGenericStmt(c: PContext, n: PNode,
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flags: TSemGenericFlags, ctx: var GenericCtx): PNode
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proc semGenericStmtScope(c: PContext, n: PNode,
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flags: TSemGenericFlags,
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ctx: var GenericCtx): PNode =
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openScope(c)
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result = semGenericStmt(c, n, flags, ctx)
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closeScope(c)
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template isMixedIn(sym): bool {.dirty.} =
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let s = sym
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s.name.id in ctx.toMixin or (withinConcept in flags and
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s.magic == mNone and
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s.kind in OverloadableSyms)
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template canOpenSym(s): bool {.dirty.} =
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{withinMixin, withinConcept} * flags == {withinMixin} and s.id notin ctx.toBind
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proc semGenericStmtSymbol(c: PContext, n: PNode, s: PSym,
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ctx: var GenericCtx; flags: TSemGenericFlags,
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isAmbiguous: bool,
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fromDotExpr=false): PNode =
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result = nil
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semIdeForTemplateOrGenericCheck(c.config, n, ctx.cursorInBody)
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incl(s.flagsImpl, sfUsed)
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template maybeDotChoice(c: PContext, n: PNode, s: PSym, fromDotExpr: bool) =
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if fromDotExpr:
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result = symChoice(c, n, s, scForceOpen)
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if result.kind == nkOpenSymChoice and result.len == 1:
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result.transitionSonsKind(nkClosedSymChoice)
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else:
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result = symChoice(c, n, s, scOpen)
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if canOpenSym(s):
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if openSym in c.features:
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if result.kind == nkSym:
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result = newOpenSym(result)
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else:
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result.typ = nil
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else:
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result.flags.incl nfDisabledOpenSym
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result.typ = nil
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case s.kind
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of skUnknown:
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# Introduced in this pass! Leave it as an identifier.
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result = n
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of skProc, skFunc, skMethod, skIterator, skConverter, skModule, skEnumField:
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maybeDotChoice(c, n, s, fromDotExpr)
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of skTemplate, skMacro:
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# alias syntax, see semSym for skTemplate, skMacro
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if sfNoalias notin s.flags and not fromDotExpr:
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onUse(n.info, s)
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case s.kind
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of skTemplate: result = semTemplateExpr(c, n, s, {efNoSemCheck})
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of skMacro: result = semMacroExpr(c, n, n, s, {efNoSemCheck})
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else: discard # unreachable
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c.friendModules.add(s.owner.getModule)
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result = semGenericStmt(c, result, {}, ctx)
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discard c.friendModules.pop()
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else:
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maybeDotChoice(c, n, s, fromDotExpr)
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of skGenericParam:
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if s.typ != nil and s.typ.kind == tyStatic:
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if s.typ.n != nil:
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result = s.typ.n
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elif c.inGenericContext > 0 and withinConcept notin flags:
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# don't leave generic param as identifier node in generic type,
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# sigmatch will try to instantiate generic type AST without all params
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# fine to give a symbol node a generic type here since
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# we are in a generic context and `prepareNode` will be called
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result = newSymNodeTypeDesc(s, c.idgen, n.info)
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if canOpenSym(result.sym):
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if openSym in c.features:
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result = newOpenSym(result)
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else:
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result.flags.incl nfDisabledOpenSym
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result.typ = nil
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else:
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result = n
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else:
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result = newSymNodeTypeDesc(s, c.idgen, n.info)
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if canOpenSym(result.sym):
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if openSym in c.features:
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result = newOpenSym(result)
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else:
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result.flags.incl nfDisabledOpenSym
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result.typ = nil
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onUse(n.info, s)
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of skParam:
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if s.owner == c.p.owner:
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# Parameters of the routine currently being semchecked stay as local
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# identifiers
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result = n
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else:
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# Preserve captured outer parameters so nested generic procs can still
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# see them after the generic pre-pass.
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result = newSymNode(s, n.info)
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onUse(n.info, s)
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of skType:
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if (s.typ != nil) and
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(s.typ.flags * {tfGenericTypeParam, tfImplicitTypeParam} == {}):
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if isAmbiguous:
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# ambiguous types should be symchoices since lookup behaves
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# differently for them in regular expressions
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maybeDotChoice(c, n, s, fromDotExpr)
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return
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result = newSymNodeTypeDesc(s, c.idgen, n.info)
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if canOpenSym(result.sym):
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if openSym in c.features:
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result = newOpenSym(result)
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else:
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result.flags.incl nfDisabledOpenSym
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result.typ = nil
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elif c.inGenericContext > 0 and withinConcept notin flags:
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# don't leave generic param as identifier node in generic type,
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# sigmatch will try to instantiate generic type AST without all params
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# fine to give a symbol node a generic type here since
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# we are in a generic context and `prepareNode` will be called
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result = newSymNodeTypeDesc(s, c.idgen, n.info)
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if canOpenSym(result.sym):
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if openSym in c.features:
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result = newOpenSym(result)
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else:
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result.flags.incl nfDisabledOpenSym
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result.typ = nil
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else:
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result = n
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onUse(n.info, s)
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else:
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result = newSymNode(s, n.info)
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if canOpenSym(result.sym):
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if openSym in c.features:
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result = newOpenSym(result)
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else:
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result.flags.incl nfDisabledOpenSym
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result.typ = nil
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onUse(n.info, s)
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proc lookup(c: PContext, n: PNode, flags: TSemGenericFlags,
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ctx: var GenericCtx): PNode =
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result = n
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let ident = considerQuotedIdent(c, n)
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var amb = false
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var s = searchInScopes(c, ident, amb)
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if s == nil:
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s = strTableGet(c.pureEnumFields, ident)
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#if s != nil and contains(c.ambiguousSymbols, s.id):
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# s = nil
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if s == nil:
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if ident.id notin ctx.toMixin and withinMixin notin flags:
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errorUndeclaredIdentifier(c, n.info, ident.s)
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else:
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if withinBind in flags or s.id in ctx.toBind:
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result = symChoice(c, n, s, scClosed)
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elif s.isMixedIn:
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result = symChoice(c, n, s, scForceOpen)
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else:
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result = semGenericStmtSymbol(c, n, s, ctx, flags, amb)
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# else: leave as nkIdent
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proc newDot(n, b: PNode): PNode =
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result = newNodeI(nkDotExpr, n.info)
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result.add(n[0])
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result.add(b)
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proc fuzzyLookup(c: PContext, n: PNode, flags: TSemGenericFlags,
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ctx: var GenericCtx; isMacro: var bool;
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inCall = false): PNode =
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assert n.kind == nkDotExpr
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semIdeForTemplateOrGenericCheck(c.config, n, ctx.cursorInBody)
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let luf = if withinMixin notin flags: {checkUndeclared, checkModule} else: {checkModule}
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c.isAmbiguous = false
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var s = qualifiedLookUp(c, n, luf)
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if s != nil:
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isMacro = s.kind in {skTemplate, skMacro}
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result = semGenericStmtSymbol(c, n, s, ctx, flags, c.isAmbiguous)
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else:
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n[0] = semGenericStmt(c, n[0], flags, ctx)
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result = n
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let n = n[1]
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let ident = considerQuotedIdent(c, n)
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# could be type conversion if like a.T and not a.T()
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let symKinds = if inCall: routineKinds else: routineKinds+{skType}
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var candidates = selectFromScopesElseAll(c, ident, symKinds)
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if candidates.len > 0:
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let s = candidates[0] # XXX take into account the other candidates!
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isMacro = s.kind in {skTemplate, skMacro}
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if withinBind in flags or s.id in ctx.toBind:
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if s.kind == skType: # don't put types in sym choice
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var ambig = false
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if candidates.len > 1:
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let s2 = searchInScopes(c, ident, ambig)
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result = newDot(result, semGenericStmtSymbol(c, n, s, ctx, flags,
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isAmbiguous = ambig, fromDotExpr = true))
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else:
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result = newDot(result, symChoice(c, n, s, scClosed))
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elif s.isMixedIn:
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result = newDot(result, symChoice(c, n, s, scForceOpen))
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else:
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var ambig = false
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if s.kind == skType and candidates.len > 1:
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discard searchInScopes(c, ident, ambig)
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let syms = semGenericStmtSymbol(c, n, s, ctx, flags,
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isAmbiguous = ambig, fromDotExpr = true)
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result = newDot(result, syms)
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proc addTempDecl(c: PContext; n: PNode; kind: TSymKind) =
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let s = newSymS(skUnknown, getIdentNode(c, n), c)
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addPrelimDecl(c, s)
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styleCheckDef(c, n.info, s, kind)
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onDef(n.info, s)
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proc addTempDeclToIdents(c: PContext; n: PNode; kind: TSymKind; inCall: bool) =
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case n.kind
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of nkIdent:
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if inCall:
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addTempDecl(c, n, kind)
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of nkCallKinds:
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for s in n:
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addTempDeclToIdents(c, s, kind, true)
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else:
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for s in n:
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addTempDeclToIdents(c, s, kind, inCall)
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proc semGenericStmt(c: PContext, n: PNode,
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flags: TSemGenericFlags, ctx: var GenericCtx): PNode =
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result = n
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when defined(nimsuggest):
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if withinTypeDesc in flags: inc c.inTypeContext
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#if conf.cmd == cmdIdeTools: suggestStmt(c, n)
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semIdeForTemplateOrGenericCheck(c.config, n, ctx.cursorInBody)
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case n.kind
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of nkIdent, nkAccQuoted:
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result = lookup(c, n, flags, ctx)
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if result != nil and result.kind == nkSym:
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assert result.sym != nil
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incl result.sym.flagsImpl, sfUsed
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markOwnerModuleAsUsed(c, result.sym)
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of nkDotExpr:
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#let luf = if withinMixin notin flags: {checkUndeclared} else: {}
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#var s = qualifiedLookUp(c, n, luf)
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#if s != nil: result = semGenericStmtSymbol(c, n, s)
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# XXX for example: ``result.add`` -- ``add`` needs to be looked up here...
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var dummy: bool = false
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result = fuzzyLookup(c, n, flags, ctx, dummy)
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of nkSym:
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let a = n.sym
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let b = getGenSym(c, a)
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if b != a: n.sym = b
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of nkEmpty, succ(nkSym)..nkNilLit, nkComesFrom:
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# see tests/compile/tgensymgeneric.nim:
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# We need to open the gensym'ed symbol again so that the instantiation
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# creates a fresh copy; but this is wrong the very first reason for gensym
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# is that scope rules cannot be used! So simply removing 'sfGenSym' does
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# not work. Copying the symbol does not work either because we're already
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# the owner of the symbol! What we need to do is to copy the symbol
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# in the generic instantiation process...
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discard
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of nkBind:
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result = semGenericStmt(c, n[0], flags+{withinBind}, ctx)
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of nkMixinStmt:
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result = semMixinStmt(c, n, ctx.toMixin)
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of nkBindStmt:
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result = semBindStmt(c, n, ctx.toBind)
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of nkCall, nkHiddenCallConv, nkInfix, nkPrefix, nkCommand, nkCallStrLit:
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# check if it is an expression macro:
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checkMinSonsLen(n, 1, c.config)
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let fn = n[0]
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c.isAmbiguous = false
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var s = qualifiedLookUp(c, fn, {})
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let ambig = c.isAmbiguous
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if s == nil and
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{withinMixin, withinConcept}*flags == {} and
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fn.kind in {nkIdent, nkAccQuoted} and
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considerQuotedIdent(c, fn).id notin ctx.toMixin:
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errorUndeclaredIdentifier(c, n.info, fn.renderTree)
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var first = int ord(withinConcept in flags)
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var mixinContext = false
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if s != nil:
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incl(s.flagsImpl, sfUsed)
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mixinContext = s.magic in {mDefined, mDeclared, mDeclaredInScope, mCompiles, mAstToStr}
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let whichChoice = if s.id in ctx.toBind: scClosed
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elif s.isMixedIn: scForceOpen
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else: scOpen
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let sc = symChoice(c, fn, s, whichChoice)
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case s.kind
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of skMacro, skTemplate:
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# unambiguous macros/templates are expanded if all params are untyped
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if sfAllUntyped in s.flags and sc.safeLen <= 1:
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onUse(fn.info, s)
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case s.kind
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of skMacro: result = semMacroExpr(c, n, n, s, {efNoSemCheck})
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of skTemplate: result = semTemplateExpr(c, n, s, {efNoSemCheck})
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else: discard # unreachable
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c.friendModules.add(s.owner.getModule)
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result = semGenericStmt(c, result, flags, ctx)
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discard c.friendModules.pop()
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else:
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n[0] = sc
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result = n
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# BUGFIX: we must not return here, we need to do first phase of
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# symbol lookup. Also since templates and macros can do scope injections
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# we need to put the ``c`` in ``t(c)`` in a mixin context to prevent
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# the famous "undeclared identifier: it" bug:
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mixinContext = true
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of skUnknown, skParam:
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# Leave it as an identifier.
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discard
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of skProc, skFunc, skMethod, skIterator, skConverter, skModule:
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result[0] = sc
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first = 1
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# We're not interested in the example code during this pass so let's
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# skip it
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if s.magic == mRunnableExamples:
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first = result.safeLen # see trunnableexamples.fun3
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of skGenericParam:
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result[0] = newSymNodeTypeDesc(s, c.idgen, fn.info)
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onUse(fn.info, s)
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first = 1
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of skType:
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# bad hack for generics:
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if (s.typ != nil) and (s.typ.kind != tyGenericParam):
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if ambig:
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# ambiguous types should be symchoices since lookup behaves
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# differently for them in regular expressions
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result[0] = sc
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else:
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result[0] = newSymNodeTypeDesc(s, c.idgen, fn.info)
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onUse(fn.info, s)
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first = 1
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else:
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result[0] = newSymNode(s, fn.info)
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onUse(fn.info, s)
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first = 1
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elif fn.kind == nkDotExpr:
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result[0] = fuzzyLookup(c, fn, flags, ctx, mixinContext, inCall = true)
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first = 1
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# Consider 'when declared(globalsSlot): ThreadVarSetValue(globalsSlot, ...)'
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# in threads.nim: the subtle preprocessing here binds 'globalsSlot' which
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# is not exported and yet the generic 'threadProcWrapper' works correctly.
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let flags = if mixinContext: flags+{withinMixin} else: flags
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for i in first..<result.safeLen:
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result[i] = semGenericStmt(c, result[i], flags, ctx)
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of nkCurlyExpr:
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result = newNodeI(nkCall, n.info)
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result.add newIdentNode(getIdent(c.cache, "{}"), n.info)
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for i in 0..<n.len: result.add(n[i])
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result = semGenericStmt(c, result, flags, ctx)
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of nkBracketExpr:
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result = newNodeI(nkCall, n.info)
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result.add newIdentNode(getIdent(c.cache, "[]"), n.info)
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for i in 0..<n.len: result.add(n[i])
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result = semGenericStmt(c, result, flags, ctx)
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of nkAsgn, nkFastAsgn, nkSinkAsgn:
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checkSonsLen(n, 2, c.config)
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let a = n[0]
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let b = n[1]
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let k = a.kind
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case k
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of nkCurlyExpr:
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result = newNodeI(nkCall, n.info)
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result.add newIdentNode(getIdent(c.cache, "{}="), n.info)
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for i in 0..<a.len: result.add(a[i])
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result.add(b)
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result = semGenericStmt(c, result, flags, ctx)
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of nkBracketExpr:
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result = newNodeI(nkCall, n.info)
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result.add newIdentNode(getIdent(c.cache, "[]="), n.info)
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for i in 0..<a.len: result.add(a[i])
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result.add(b)
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result = semGenericStmt(c, result, flags, ctx)
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else:
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for i in 0..<n.len:
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result[i] = semGenericStmt(c, n[i], flags, ctx)
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of nkIfStmt:
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for i in 0..<n.len:
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n[i] = semGenericStmtScope(c, n[i], flags, ctx)
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of nkWhenStmt:
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for i in 0..<n.len:
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# bug #8603: conditions of 'when' statements are not
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# in a 'mixin' context:
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let it = n[i]
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if it.kind in {nkElifExpr, nkElifBranch}:
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n[i][0] = semGenericStmt(c, it[0], flags, ctx)
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n[i][1] = semGenericStmt(c, it[1], flags+{withinMixin}, ctx)
|
|
else:
|
|
n[i] = semGenericStmt(c, it, flags+{withinMixin}, ctx)
|
|
of nkWhileStmt:
|
|
openScope(c)
|
|
for i in 0..<n.len:
|
|
n[i] = semGenericStmt(c, n[i], flags, ctx)
|
|
closeScope(c)
|
|
of nkCaseStmt:
|
|
openScope(c)
|
|
n[0] = semGenericStmt(c, n[0], flags, ctx)
|
|
for i in 1..<n.len:
|
|
var a = n[i]
|
|
checkMinSonsLen(a, 1, c.config)
|
|
for j in 0..<a.len-1:
|
|
a[j] = semGenericStmt(c, a[j], flags+{withinMixin}, ctx)
|
|
addTempDeclToIdents(c, a[j], skVar, false)
|
|
|
|
a[^1] = semGenericStmtScope(c, a[^1], flags, ctx)
|
|
closeScope(c)
|
|
of nkForStmt, nkParForStmt:
|
|
openScope(c)
|
|
n[^2] = semGenericStmt(c, n[^2], flags, ctx)
|
|
for i in 0..<n.len - 2:
|
|
if (n[i].kind == nkVarTuple):
|
|
for s in n[i]:
|
|
if (s.kind == nkIdent):
|
|
addTempDecl(c,s,skForVar)
|
|
else:
|
|
addTempDecl(c, n[i], skForVar)
|
|
openScope(c)
|
|
n[^1] = semGenericStmt(c, n[^1], flags, ctx)
|
|
closeScope(c)
|
|
closeScope(c)
|
|
of nkBlockStmt, nkBlockExpr, nkBlockType:
|
|
checkSonsLen(n, 2, c.config)
|
|
openScope(c)
|
|
if n[0].kind != nkEmpty:
|
|
addTempDecl(c, n[0], skLabel)
|
|
n[1] = semGenericStmt(c, n[1], flags, ctx)
|
|
closeScope(c)
|
|
of nkTryStmt, nkHiddenTryStmt:
|
|
checkMinSonsLen(n, 2, c.config)
|
|
n[0] = semGenericStmtScope(c, n[0], flags, ctx)
|
|
for i in 1..<n.len:
|
|
var a = n[i]
|
|
checkMinSonsLen(a, 1, c.config)
|
|
openScope(c)
|
|
for j in 0..<a.len-1:
|
|
if a[j].isInfixAs():
|
|
addTempDecl(c, getIdentNode(c, a[j][2]), skLet)
|
|
a[j][1] = semGenericStmt(c, a[j][1], flags+{withinTypeDesc}, ctx)
|
|
else:
|
|
a[j] = semGenericStmt(c, a[j], flags+{withinTypeDesc}, ctx)
|
|
a[^1] = semGenericStmtScope(c, a[^1], flags, ctx)
|
|
closeScope(c)
|
|
|
|
of nkVarSection, nkLetSection, nkConstSection:
|
|
let varKind =
|
|
case n.kind
|
|
of nkVarSection: skVar
|
|
of nkLetSection: skLet
|
|
else: skConst
|
|
for i in 0..<n.len:
|
|
var a = n[i]
|
|
case a.kind:
|
|
of nkCommentStmt: continue
|
|
of nkIdentDefs, nkVarTuple, nkConstDef:
|
|
checkMinSonsLen(a, 3, c.config)
|
|
a[^2] = semGenericStmt(c, a[^2], flags+{withinTypeDesc}, ctx)
|
|
a[^1] = semGenericStmt(c, a[^1], flags, ctx)
|
|
for j in 0..<a.len-2:
|
|
addTempDecl(c, getIdentNode(c, a[j]), varKind)
|
|
else:
|
|
illFormedAst(a, c.config)
|
|
of nkGenericParams:
|
|
for i in 0..<n.len:
|
|
var a = n[i]
|
|
if (a.kind != nkIdentDefs): illFormedAst(a, c.config)
|
|
checkMinSonsLen(a, 3, c.config)
|
|
a[^2] = semGenericStmt(c, a[^2], flags+{withinTypeDesc}, ctx)
|
|
# do not perform symbol lookup for default expressions
|
|
for j in 0..<a.len-2:
|
|
addTempDecl(c, getIdentNode(c, a[j]), skType)
|
|
of nkTypeSection:
|
|
for i in 0..<n.len:
|
|
var a = n[i]
|
|
if a.kind == nkCommentStmt: continue
|
|
if (a.kind != nkTypeDef): illFormedAst(a, c.config)
|
|
checkSonsLen(a, 3, c.config)
|
|
addTempDecl(c, getIdentNode(c, a[0]), skType)
|
|
for i in 0..<n.len:
|
|
var a = n[i]
|
|
if a.kind == nkCommentStmt: continue
|
|
if (a.kind != nkTypeDef): illFormedAst(a, c.config)
|
|
checkSonsLen(a, 3, c.config)
|
|
if a[1].kind != nkEmpty:
|
|
openScope(c)
|
|
a[1] = semGenericStmt(c, a[1], flags, ctx)
|
|
a[2] = semGenericStmt(c, a[2], flags+{withinTypeDesc}, ctx)
|
|
closeScope(c)
|
|
else:
|
|
a[2] = semGenericStmt(c, a[2], flags+{withinTypeDesc}, ctx)
|
|
of nkEnumTy:
|
|
if n.len > 0:
|
|
if n[0].kind != nkEmpty:
|
|
n[0] = semGenericStmt(c, n[0], flags+{withinTypeDesc}, ctx)
|
|
for i in 1..<n.len:
|
|
var a: PNode = nil
|
|
case n[i].kind
|
|
of nkEnumFieldDef: a = n[i][0]
|
|
of nkIdent: a = n[i]
|
|
else: illFormedAst(n, c.config)
|
|
addDecl(c, newSymS(skUnknown, getIdentNode(c, a), c))
|
|
of nkTupleTy:
|
|
for i in 0..<n.len:
|
|
var a = n[i]
|
|
case a.kind:
|
|
of nkCommentStmt, nkNilLit, nkSym, nkEmpty: continue
|
|
of nkIdentDefs:
|
|
checkMinSonsLen(a, 3, c.config)
|
|
a[^2] = semGenericStmt(c, a[^2], flags+{withinTypeDesc}, ctx)
|
|
a[^1] = semGenericStmt(c, a[^1], flags, ctx)
|
|
for j in 0..<a.len-2:
|
|
addTempDecl(c, getIdentNode(c, a[j]), skField)
|
|
else:
|
|
illFormedAst(a, c.config)
|
|
of nkObjectTy:
|
|
if n.len > 0:
|
|
openScope(c)
|
|
for i in 0..<n.len:
|
|
result[i] = semGenericStmt(c, n[i], flags, ctx)
|
|
closeScope(c)
|
|
of nkRecList:
|
|
for i in 0..<n.len:
|
|
var a = n[i]
|
|
case a.kind:
|
|
of nkCommentStmt, nkNilLit, nkSym, nkEmpty: continue
|
|
of nkIdentDefs:
|
|
checkMinSonsLen(a, 3, c.config)
|
|
a[^2] = semGenericStmt(c, a[^2], flags+{withinTypeDesc}, ctx)
|
|
a[^1] = semGenericStmt(c, a[^1], flags, ctx)
|
|
for j in 0..<a.len-2:
|
|
addTempDecl(c, getIdentNode(c, a[j]), skField)
|
|
of nkRecCase, nkRecWhen:
|
|
n[i] = semGenericStmt(c, a, flags, ctx)
|
|
else:
|
|
illFormedAst(a, c.config)
|
|
of nkRecCase:
|
|
checkSonsLen(n[0], 3, c.config)
|
|
n[0][^2] = semGenericStmt(c, n[0][^2], flags+{withinTypeDesc}, ctx)
|
|
n[0][^1] = semGenericStmt(c, n[0][^1], flags, ctx)
|
|
addTempDecl(c, getIdentNode(c, n[0][0]), skField)
|
|
for i in 1..<n.len:
|
|
n[i] = semGenericStmt(c, n[i], flags, ctx)
|
|
of nkFormalParams:
|
|
checkMinSonsLen(n, 1, c.config)
|
|
for i in 1..<n.len:
|
|
var a = n[i]
|
|
if (a.kind != nkIdentDefs): illFormedAst(a, c.config)
|
|
checkMinSonsLen(a, 3, c.config)
|
|
a[^2] = semGenericStmt(c, a[^2], flags+{withinTypeDesc}, ctx)
|
|
a[^1] = semGenericStmt(c, a[^1], flags, ctx)
|
|
for j in 0..<a.len-2:
|
|
addTempDecl(c, getIdentNode(c, a[j]), skParam)
|
|
# XXX: last change was moving this down here, search for "1.." to keep
|
|
# going from this file onward
|
|
if n[0].kind != nkEmpty:
|
|
n[0] = semGenericStmt(c, n[0], flags+{withinTypeDesc}, ctx)
|
|
of nkProcDef, nkMethodDef, nkConverterDef, nkMacroDef, nkTemplateDef,
|
|
nkFuncDef, nkIteratorDef, nkLambdaKinds:
|
|
checkSonsLen(n, bodyPos + 1, c.config)
|
|
if n[namePos].kind != nkEmpty:
|
|
addTempDecl(c, getIdentNode(c, n[0]), skProc)
|
|
openScope(c)
|
|
n[genericParamsPos] = semGenericStmt(c, n[genericParamsPos],
|
|
flags, ctx)
|
|
if n[paramsPos].kind != nkEmpty:
|
|
if n[paramsPos][0].kind != nkEmpty:
|
|
addPrelimDecl(c, newSym(skUnknown, getIdent(c.cache, "result"), c.idgen, nil, n.info))
|
|
n[paramsPos] = semGenericStmt(c, n[paramsPos], flags, ctx)
|
|
n[pragmasPos] = semGenericStmt(c, n[pragmasPos], flags, ctx)
|
|
var body: PNode
|
|
if n[namePos].kind == nkSym:
|
|
let s = n[namePos].sym
|
|
if sfGenSym in s.flags and s.ast == nil:
|
|
body = n[bodyPos]
|
|
else:
|
|
body = getBody(c.graph, s)
|
|
else: body = n[bodyPos]
|
|
let bodyFlags = if n.kind == nkTemplateDef: flags + {withinMixin} else: flags
|
|
n[bodyPos] = semGenericStmtScope(c, body, bodyFlags, ctx)
|
|
closeScope(c)
|
|
of nkPragmaExpr:
|
|
result[1] = semGenericStmt(c, n[1], flags, ctx)
|
|
of nkPragma:
|
|
for i in 0 ..< n.len:
|
|
let x = n[i]
|
|
let prag = whichPragma(x)
|
|
if x.kind in nkPragmaCallKinds:
|
|
# process each child individually to prevent untyped macros/templates
|
|
# from instantiating
|
|
# if pragma is language-level pragma, skip name node:
|
|
let start = ord(prag != wInvalid)
|
|
for j in start ..< x.len:
|
|
# treat as mixin context for user pragmas & macro args
|
|
x[j] = semGenericStmt(c, x[j], flags+{withinMixin}, ctx)
|
|
elif prag == wInvalid:
|
|
# only sem if not a language-level pragma
|
|
# treat as mixin context for user pragmas & macro args
|
|
result[i] = semGenericStmt(c, x, flags+{withinMixin}, ctx)
|
|
of nkExprColonExpr, nkExprEqExpr:
|
|
checkMinSonsLen(n, 2, c.config)
|
|
result[1] = semGenericStmt(c, n[1], flags, ctx)
|
|
of nkObjConstr:
|
|
for i in 0..<n.len:
|
|
result[i] = semGenericStmt(c, n[i], flags, ctx)
|
|
if result[0].kind == nkSym:
|
|
let fmoduleId = getModule(result[0].sym).id
|
|
var isVisable = false
|
|
for module in c.friendModules:
|
|
if module.id == fmoduleId:
|
|
isVisable = true
|
|
break
|
|
if isVisable:
|
|
for i in 1..<result.len:
|
|
if result[i].kind == nkExprColonExpr:
|
|
result[i][1].flags.incl nfSkipFieldChecking
|
|
else:
|
|
for i in 0..<n.len:
|
|
result[i] = semGenericStmt(c, n[i], flags, ctx)
|
|
|
|
when defined(nimsuggest):
|
|
if withinTypeDesc in flags: dec c.inTypeContext
|
|
|
|
proc semGenericStmt(c: PContext, n: PNode): PNode =
|
|
var ctx = GenericCtx(
|
|
toMixin: initIntSet(),
|
|
toBind: initIntSet()
|
|
)
|
|
result = semGenericStmt(c, n, {}, ctx)
|
|
semIdeForTemplateOrGeneric(c, result, ctx.cursorInBody)
|
|
|
|
proc semConceptBody(c: PContext, n: PNode): PNode =
|
|
var ctx = GenericCtx(
|
|
toMixin: initIntSet(),
|
|
toBind: initIntSet()
|
|
)
|
|
result = semGenericStmt(c, n, {withinConcept}, ctx)
|
|
semIdeForTemplateOrGeneric(c, result, ctx.cursorInBody)
|
|
|