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#
#
# The Nim Compiler
# (c) Copyright 2015 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
## Plugin support for the Nim compiler. Right now they
## need to be build with the compiler, no DLL support.
import ast, semdata, idents
type
Transformation* = proc (c: PContext; n: PNode): PNode {.nimcall.}
Plugin = ref object
fn, module, package: PIdent
t: Transformation
next: Plugin
proc pluginMatches(p: Plugin; s: PSym): bool =
if s.name.id != p.fn.id:
return false
let module = s.skipGenericOwner
if module == nil or module.kind != skModule or
module.name.id != p.module.id:
return false
let package = module.owner
if package == nil or package.kind != skPackage or
package.name.id != p.package.id:
return false
return true
var head: Plugin
proc getPlugin*(fn: PSym): Transformation =
var it = head
while it != nil:
if pluginMatches(it, fn): return it.t
it = it.next
proc registerPlugin*(package, module, fn: string; t: Transformation) =
let oldHead = head
head = Plugin(fn: getIdent(fn), module: getIdent(module),
package: getIdent(package), t: t, next: oldHead)
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