WIP: an API for VM replay global state support

compiler/macrocacheimpl.nim

@@ -0,0 +1,49 @@
+#
+#
+#           The Nim Compiler
+#        (c) Copyright 2018 Andreas Rumpf
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+## This module implements helpers for the macro cache.
+
+import lineinfos, ast, modulegraphs, vmdef, magicsys
+
+proc genCall3(g: ModuleGraph; m: TMagic; s: string; a, b, c: PNode): PNode =
+  newTree(nkStaticStmt, newTree(nkCall, createMagic(g, s, m).newSymNode, a, b, c))
+
+proc genCall2(g: ModuleGraph; m: TMagic; s: string; a, b: PNode): PNode =
+  newTree(nkStaticStmt, newTree(nkCall, createMagic(g, s, m).newSymNode, a, b))
+
+template nodeFrom(s: string): PNode =
+  var res = newStrNode(s, info)
+  res.typ = getSysType(g, info, tyString)
+  res
+
+template nodeFrom(i: BiggestInt): PNode =
+  var res = newIntNode(i, info)
+  res.typ = getSysType(g, info, tyInt)
+  res
+
+template nodeFrom(n: PNode): PNode = copyTree(n)
+
+template record(call) =
+  g.recordStmt(g, c.module, call)
+
+proc recordInc*(c: PCtx; info: TLineInfo; key: string; by: BiggestInt) =
+  let g = c.graph
+  record genCall2(mNccInc, "inc", nodeFrom key, nodeFrom by)
+
+proc recordPut*(c: PCtx; info: TLineInfo; key: string; k: string; val: PNode) =
+  let g = c.graph
+  record genCall3(mNctPut, "[]=", nodeFrom key, nodeFrom k, nodeFrom val)
+
+proc recordAdd*(c: PCtx; info: TLineInfo; key: string; val: PNode) =
+  let g = c.graph
+  record genCall2(mNcsAdd, "add", nodeFrom key, nodeFrom val)
+
+proc recordIncl*(c: PCtx; info: TLineInfo; key: string; val: PNode) =
+  let g = c.graph
+  record genCall2(mNcsIncl, "incl", nodeFrom key, nodeFrom val)