system.writeFile works at compile-time

compiler/vmops.nim

@@ -21,6 +21,9 @@ template mathop(op) {.immediate, dirty.} =
 template osop(op) {.immediate, dirty.} =
   registerCallback(c, "stdlib.os." & astToStr(op), `op Wrapper`)
 
+template systemop(op) {.immediate, dirty.} =
+  registerCallback(c, "stdlib.system." & astToStr(op), `op Wrapper`)
+
 template wrap1f(op) {.immediate, dirty.} =
   proc `op Wrapper`(a: VmArgs) {.nimcall.} =
     setResult(a, op(getFloat(a, 0)))
@@ -36,6 +39,11 @@ template wrap1s(op) {.immediate, dirty.} =
     setResult(a, op(getString(a, 0)))
   osop op
 
+template wrap2svoid(op) {.immediate, dirty.} =
+  proc `op Wrapper`(a: VmArgs) {.nimcall.} =
+    op(getString(a, 0), getString(a, 1))
+  systemop op
+
 proc registerAdditionalOps*(c: PCtx) =
   wrap1f(sqrt)
   wrap1f(ln)
@@ -64,3 +72,4 @@ proc registerAdditionalOps*(c: PCtx) =
   wrap1s(existsEnv)
   wrap1s(dirExists)
   wrap1s(fileExists)
+  wrap2svoid(writeFile)

todo.txt

@@ -1,10 +1,8 @@
 version 0.10
 ============
 
-- document the new concurrency system
 - Test nimfix on various babel packages
 - deprecate recursive tuples; tuple needs laxer type checking
-- string case should require an 'else'
 - # echo type.int
 - VM: try does not work at all
 - VM: Pegs do not work at compile-time

web/news.txt

@@ -57,7 +57,7 @@ News
   - There is a new ``parallel`` statement for safe fork&join parallel computing.
   - ``guard`` and ``lock`` pragmas have been implemented to support safer
     concurrent programming.
-  
+  - ``system.writeFile`` can be used at compile-time.
 
   Library Additions
   -----------------