Add feature flag capability

config.nims

@@ -9,4 +9,11 @@ when defined(Windows):
   switch("gc", "markAndSweep")
 
 # Retain stackTrace for clear errors
-switch("stackTrace", "on")
+switch("stackTrace", "on")
+
+# Path to compiler
+switch("path", "$nim")
+
+# Case objects
+when not defined(danger):
+  switch("define", "nimOldCaseObjects")

nimterop.nimble

@@ -25,7 +25,7 @@ proc execTest(test: string) =
   execCmd "nim cpp -r " & test
 
 task buildToast, "build toast":
-  execCmd("nim c -f -d:danger nimterop/toast.nim")
+  execCmd("nim c -f nimterop/toast.nim")
 
 task bt, "build toast":
   execCmd("nim c -d:danger nimterop/toast.nim")

nimterop/globals.nim

@@ -59,6 +59,8 @@ type
 
     code*, dynlib*, mode*, nim*, overrides*, pluginSource*, pluginSourcePath*: string
 
+    feature*: seq[Feature]
+
     onSymbol*, onSymbolOverride*: OnSymbol
     onSymbolOverrideFinal*: OnSymbolOverrideFinal
 
@@ -77,6 +79,12 @@ type
 
     nodeBranch*: seq[string]
 
+  CompileMode = enum
+    c, cpp
+
+  Feature* = enum
+    ast2
+
 var
   gStateCT {.compiletime, used.} = new(State)
 
@@ -86,12 +94,7 @@ template nBl(s: typed): untyped {.used.} =
 template Bl(s: typed): untyped {.used.} =
   (s.len == 0)
 
-type CompileMode = enum
+const modeDefault {.used.} = $cpp
-  c,
-  cpp,
-
-# TODO: can cligen accept enum instead of string?
-const modeDefault {.used.} = $cpp # TODO: USE this everywhere relevant
 
 when not declared(CIMPORT):
   export gAtoms, gExpressions, gEnumVals, Kind, Ast, AstTable, State, NimState,

nimterop/toast.nim

@@ -103,6 +103,7 @@ proc main(
     debug = false,
     defines: seq[string] = @[],
     dynlib: string = "",
+    feature: seq[Feature] = @[],
     includeDirs: seq[string] = @[],
     mode = modeDefault,
     nim: string = "nim",
@@ -126,6 +127,7 @@ proc main(
     debug: debug,
     defines: defines,
     dynlib: dynlib,
+    feature: feature,
     includeDirs: includeDirs,
     mode: mode,
     nim: nim,
@@ -235,6 +237,7 @@ when isMainModule:
     "debug": "enable debug output",
     "defines": "definitions to pass to preprocessor",
     "dynlib": "Import symbols from library in specified Nim string",
+    "feature": "flags to enable experimental features",
     "includeDirs": "include directory to pass to preprocessor",
     "mode": "language parser: c or cpp",
     "nim": "use a particular Nim executable (default: $PATH/nim)",
@@ -256,6 +259,7 @@ when isMainModule:
     "debug": 'd',
     "defines": 'D',
     "dynlib": 'l',
+    "feature": 'f',
     "includeDirs": 'I',
     "nocomments": 'c',
     "output": 'o',