more code

elua.moon

@@ -1,10 +1,19 @@
 
-moon = require "moon"
 import insert, concat from table
 
-escape_pattern = do
+setfenv = setfenv or (fn, env) ->
-  punct = "[%^$()%.%[%]*+%-?%%]"
+  local name
-  (str) -> (str\gsub punct, (p) -> "%"..p)
+  i = 1
+  while true
+    name = debug.getupvalue fn, i
+    break if not name or name == "_ENV"
+    i += 1
+
+  if name
+    debug.upvaluejoin fn, i, (-> env), 1
+
+  fn
+
 
 class Parser
   open_tag: "<%"
@@ -28,16 +37,53 @@ class Parser
       with @str\sub @pos, @pos
         @pos += 1
 
-    -- TODO: find the next tag or string, whichever is closer
+    close_start, close_stop = @str\find @close_tag, @pos, true
-    start, stop = @str\find @close_tag, @pos, true
+    while @in_string @pos, close_start
-    kind = modifier == "=" and "interplate" or "code"
+      close_start, close_stop = @str\find @close_tag, close_stop, true
-    @push_code kind, @pos, start - 1
 
-    @pos = stop + 1
+    kind = modifier == "=" and "interplate" or "code"
+    @push_code kind, @pos, close_start - 1
+
+    @pos = close_stop + 1
     true
 
-  -- closest_string: ->
+  -- see if stop leaves us in the middle of a string
-  --   start = @str\find "[=*["
+  in_string: (start, stop) =>
+    in_string = false
+    end_delim = nil
+    escape = false
+
+    pos = 0
+    skip_until = nil
+
+    chunk = @str\sub start, stop
+    for char in chunk\gmatch "."
+      pos += 1
+
+      if skip_until
+        continue if pos <= skip_until
+        skip_until = nil
+
+      if end_delim
+        if end_delim == char and not escape
+          in_string = false
+          end_delim = nil
+      else
+        if char == "'" or char == '"'
+          end_delim = char
+          in_string = true
+
+        if char == "["
+          if lstring = chunk\match "^%[=*%[", pos
+            lstring_end = lstring\gsub "%[", "]"
+            lstring_p1, lstring_p2 = chunk\find lstring_end, pos, true
+            -- no closing lstring, must be inside string
+            return true unless lstring_p1
+            skip_until = lstring_p2
+
+      escape = char == "\\"
+
+    in_string
 
   push_raw: (start, stop) =>
     insert @chunks, @str\sub start, stop
@@ -47,22 +93,32 @@ class Parser
       kind, @str\sub start, stop
     }
 
+  compile: (str) =>
+    @parse str
+    @load @chunks_to_lua!
+
   parse: (@str) =>
-    assert type(@str) == "string"
+    assert type(@str) == "string", "expecting string for parse"
     @pos = 1
     @chunks = {}
 
     while @next_tag!
       nil
 
-    @compile!
+  load: (code, name="elua") =>
+    code_fn = coroutine.wrap ->
+      coroutine.yield code
+
+    fn = load code_fn, name
+    (env={}) ->
+      setfenv fn, env
+      fn tostring, concat
 
   -- generates the code of the template
-  compile: =>
+  chunks_to_lua: =>
-    -- moon.p @chunks
     -- todo: find a no-conflict name for buffer
     buffer = {
-      "local _b, _b_i, _tostring = {}, 0, tostring"
+      "local _b, _b_i, _tostring, _concat = {}, 0, ..."
     }
     buffer_i = #buffer
 
@@ -91,33 +147,11 @@ class Parser
         else
           error "unknown type #{t}"
 
-    push "return table.concat(_b)"
+    push "return _concat(_b)"
     concat buffer, "\n"
 
-p = Parser!
+compile = Parser!\compile
-code = p\parse [[
+render = (str, env) -> compile(str) env
-  This is my message to <%= "you" %>
-  This is my message to <%= 4 %>
-  <% if things then %>
-    I love things
-  <% end %>
 
-  <% for i=1,10 do%>
+{ :compile, :render, :Parser }
-    hello <%= i %>
-  <% end %>
-
-  message: <%= visitor %>
-
-  This is my message to <%= "y%>u" %>
-
-]]
-
-print code
--- fn = assert loadstring code
--- setfenv fn, setmetatable {
---   visitor: "HELLO VISITOR"
---   things: true
--- }, __index: _G
--- 
--- print fn!
 

spec/elua_spec.moon

@@ -0,0 +1,95 @@
+
+import compile, render, Parser from require "elua"
+
+describe "elua", ->
+  describe "Parser", ->
+    cases = {
+      {
+        "hello world"
+        "hello world"
+      }
+
+
+      {
+        "one surf-zone two"
+        "one <%= var %> two"
+        {var: "surf-zone"}
+      }
+
+      {
+        "a ((1))((2))((3)) b"
+        "a <% for i=1,3 do %>((<%= i %>))<% end %> b"
+      }
+
+      {
+        "y%>u"
+        [[<%= "y%>u" %>]]
+      }
+
+
+      {
+        [[
+This is my message to you
+This is my message to 4
+
+
+
+  hello 1
+
+  hello 2
+
+  hello 3
+
+  hello 4
+
+  hello 5
+
+  hello 6
+
+  hello 7
+
+  hello 8
+
+  hello 9
+
+  hello 10
+
+
+message: yeah
+
+This is my message to oh yeah  %>"]]
+        [[
+This is my message to <%= "you" %>
+This is my message to <%= 4 %>
+<% if things then %>
+  I love things
+<% end %>
+
+<% for i=1,10 do%>
+  hello <%= i %>
+<% end %>
+
+message: <%= visitor %>
+
+This is my message to <%= [=[oh yeah  %>"]=] %>]]
+        {
+          visitor: "yeah"
+        }
+      }
+    }
+
+    for case in *cases
+      it "should run template", ->
+        assert.same case[1], render unpack case, 2
+
+  describe "Parser.in_string", ->
+    cases = {
+      { "hello world", false }
+      { "hello 'world", true }
+      { [[hello "hello \" world]], true }
+      { "hello [=[ wor'ld ]=]dad", false }
+    }
+
+    for {str, expected} in *cases
+      it "should detect if in string", ->
+        assert.same expected, Parser.in_string { :str }, 1