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import macros | |
proc assertEq(arg0,arg1: string): void = | |
if arg0 != arg1: | |
raiseAssert("strings not equal:\n" & arg0 & "\n" & arg1) | |
static: | |
# a simple assignment of stmtList to another variable | |
var node: NimNode | |
# an assignment of stmtList into an array | |
var nodeArray: array[1, NimNode] | |
# an assignment of stmtList into a seq | |
var nodeSeq = newSeq[NimNode](1) | |
proc checkNode(arg: NimNode; name: string): void {. compileTime .} = | |
echo "checking ", name | |
assertEq arg.lispRepr , "StmtList(DiscardStmt(Empty()))" | |
node = arg | |
nodeArray = [arg] | |
nodeSeq[0] = arg | |
arg.add newCall(ident"echo", newLit("Hello World")) | |
assertEq arg.lispRepr , """StmtList(DiscardStmt(Empty()), Call(Ident(!"echo"), StrLit(Hello World)))""" | |
assertEq node.lispRepr , """StmtList(DiscardStmt(Empty()), Call(Ident(!"echo"), StrLit(Hello World)))""" | |
assertEq nodeArray[0].lispRepr , """StmtList(DiscardStmt(Empty()), Call(Ident(!"echo"), StrLit(Hello World)))""" | |
assertEq nodeSeq[0].lispRepr , """StmtList(DiscardStmt(Empty()), Call(Ident(!"echo"), StrLit(Hello World)))""" | |
echo "OK" | |
static: | |
# the root node that is used to generate the Ast | |
var stmtList: NimNode | |
stmtList = newStmtList(nnkDiscardStmt.newTree(newEmptyNode())) | |
checkNode(stmtList, "direct construction") | |
macro foo(stmtList: untyped): untyped = | |
checkNode(stmtList, "untyped macro argument") | |
foo: | |
discard | |
static: | |
stmtList = quote do: | |
discard | |
checkNode(stmtList, "create with quote") | |
static: | |
echo "testing body from loop" | |
var loop = quote do: | |
for i in 0 ..< 10: | |
discard | |
let innerBody = loop[0][2] | |
innerBody.add newCall(ident"echo", newLit("Hello World")) | |
assertEq loop[0][2].lispRepr, innerBody.lispRepr | |
echo "OK" |
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