A slick formatter for the insane

format.lua

local function format(arg)
  local function expand(v)
    if type(v) == "string" then
      return v
    elseif type(v) == "table" then
      return tostring(v[1])
    end

    error("unsupported type")
  end

  local function curry(f, state)
    return function(v)
      return f(state, v)
    end
  end

  local function handler(state, v)
    if v == nil then
      return state
    end

    return curry(handler, state .. expand(v))
  end

  return handler("", arg)
end

local myVar = 42
local bold = "{bold marker}"

print(format "myVar = " {myVar} "; " {bold} "bold, if not daring" ())
--> myVar = 42; {bold marker}bold, if not daring