handle quoted template expressions and template interpolations

example/example.hcl

@@ -15,15 +15,18 @@ resource_1 "strlit1" "strlit2" {
   splat1 = tuple.*.foo.bar[0]
   splat2 = tuple[*].foo.bar[0]
   for1   = { for i, v in ["a", "a", "b"] : v => i... }
-  for2   = [ for k, v in local.map : "${k}-${v}" ]
-  for3   = { for k, v in local.map : k => v }
-  for4   = [ for v in local.list : v ]
-  for5   = { for v in local.list : v => v }
-  for6   = [ for v in local.list : v if v < 3 ]
+  for2   = [ for k, v in var.map : "${k}-${v}" ]
+  for3   = { for k, v in var.map : k => v }
+  for4   = [ for v in var.list : v ]
+  for5   = { for v in var.list : v => v }
+  for6   = [ for v in var.list : v if v < 3 ]
   func1  = is_number("123")
   cond1  = (1 == 2) ? 1 : "foobar"
   bin1   = ((1+2)%3)*4
   esc1   = "\" \t \UFF11FF22 \uFFFF \n"
+  esc2   = "$${} %%{}"
+  tpl1   = "prefix-${var.bar}"
+  tpl2   = "prefix-${func(\"bar\"}"
 
   nested_resource_1 {
     attr1 = 2