Compile-time code generation issue

[onionhammer]

This is a boiled down version of the issue i'm experiencing w/ my templates library.

I'm getting an 'undeclared identifier' error when I run the below code; however if line 8 is changed from "if false" to "when false" (or remove the entire if block), the code magically compiles and runs. Another mystery (to me) is that if I remove the second proc at the bottom (proc another), the code magically compiles and runs.

lib/core/macros.nim(211, 21) Error: undeclared identifier: '    <p>Test!</p>
    '

import parseutils, macros

proc parse_until_symbol(node: PNimrodNode, value: string, index: var int): bool {.compiletime.} =
    var splitValue: string
    var read = value.parseUntil(splitValue, '$', index)

    # when false:
    if false:
        var identifier: string
        read = value.parseWhile(identifier, {}, index)
        node.add newCall("add", ident("result"), newCall("$", ident(identifier)))

    if splitValue.len > 0:
        node.insert node.len, newCall("add", ident("result"), newStrLitNode(splitValue))

proc parse_template(node: PNimrodNode, value: string) {.compiletime.}  =
    var index = 0
    while index < value.len and
        parse_until_symbol(node, value, index): nil

macro tmpli*(body: expr): stmt =
    result = newStmtList()
    result.add parseExpr("result = \"\"")
    result.parse_template body[1].strVal


proc actual: string = tmpli html"""
    <p>Test!</p>
    """

proc another: string = tmpli html"""
    <p>what</p>
    """