From 349d46eb1e7f1d13f5d823e818216b5ef1cee566 Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Thu, 15 Sep 2016 08:07:32 +0200
Subject: sync with Context as of 2016-09-15

---
 lualibs-table.lua | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

(limited to 'lualibs-table.lua')

diff --git a/lualibs-table.lua b/lualibs-table.lua
index d1e0592..498f518 100644
--- a/lualibs-table.lua
+++ b/lualibs-table.lua
@@ -478,7 +478,7 @@ function table.fromhash(t)
     return hsh
 end
 
-local noquotes, hexify, handle, compact, inline, functions
+local noquotes, hexify, handle, compact, inline, functions, metacheck
 
 local reserved = table.tohash { -- intercept a language inconvenience: no reserved words as key
     'and', 'break', 'do', 'else', 'elseif', 'end', 'false', 'for', 'function', 'if',
@@ -608,7 +608,8 @@ local function do_serialize(root,name,depth,level,indexed)
         if compact then
             last = #root
             for k=1,last do
-                if root[k] == nil then
+             -- if root[k] == nil then
+                if rawget(root,k) == nil then
                     last = k - 1
                     break
                 end
@@ -817,6 +818,7 @@ local function serialize(_handle,root,name,specification) -- handle wins
         functions = specification.functions
         compact   = specification.compact
         inline    = specification.inline and compact
+        metacheck = specification.metacheck
         if functions == nil then
             functions = true
         end
@@ -826,6 +828,9 @@ local function serialize(_handle,root,name,specification) -- handle wins
         if inline == nil then
             inline = compact
         end
+        if metacheck == nil then
+            metacheck = true
+        end
     else
         noquotes  = false
         hexify    = false
@@ -833,6 +838,7 @@ local function serialize(_handle,root,name,specification) -- handle wins
         compact   = true
         inline    = true
         functions = true
+        metacheck = true
     end
     if tname == "string" then
         if name == "return" then
@@ -857,8 +863,9 @@ local function serialize(_handle,root,name,specification) -- handle wins
     end
     if root then
         -- The dummy access will initialize a table that has a delayed initialization
-        -- using a metatable. (maybe explicitly test for metatable)
-        if getmetatable(root) then -- todo: make this an option, maybe even per subtable
+        -- using a metatable. (maybe explicitly test for metatable). This can crash on
+        -- metatables that check the index against a number.
+        if metacheck and getmetatable(root) then
             local dummy = root._w_h_a_t_e_v_e_r_
             root._w_h_a_t_e_v_e_r_ = nil
         end
-- 
cgit v1.2.3


From 19ba6b14e20738c82ad539b2a4b0690e7880e3cb Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Wed, 1 Feb 2017 08:18:28 +0100
Subject: sync with Context as of 2017-02-01

---
 lualibs-table.lua | 46 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

(limited to 'lualibs-table.lua')

diff --git a/lualibs-table.lua b/lualibs-table.lua
index 498f518..39357bd 100644
--- a/lualibs-table.lua
+++ b/lualibs-table.lua
@@ -971,6 +971,41 @@ end
 
 table.flattened = flattened
 
+local function collapsed(t,f,h)
+    if f == nil then
+        f = { }
+        h = { }
+    end
+    for k=1,#t do
+        local v = t[k]
+        if type(v) == "table" then
+            collapsed(v,f,h)
+        elseif not h[v] then
+            f[#f+1] = v
+            h[v] = true
+        end
+    end
+    return f
+end
+
+local function collapsedhash(t,h)
+    if h == nil then
+        h = { }
+    end
+    for k=1,#t do
+        local v = t[k]
+        if type(v) == "table" then
+            collapsedhash(v,h)
+        else
+            h[v] = true
+        end
+    end
+    return h
+end
+
+table.collapsed     = collapsed     -- 20% faster than unique(collapsed(t))
+table.collapsedhash = collapsedhash
+
 local function unnest(t,f) -- only used in mk, for old times sake
     if not f then          -- and only relevant for token lists
         f = { }            -- this one can become obsolete
@@ -1077,7 +1112,7 @@ function table.count(t)
     return n
 end
 
-function table.swapped(t,s) -- hash
+function table.swapped(t,s) -- hash, we need to make sure we don't mess up next
     local n = { }
     if s then
         for k, v in next, s do
@@ -1090,7 +1125,14 @@ function table.swapped(t,s) -- hash
     return n
 end
 
-function table.mirrored(t) -- hash
+function table.hashed(t) -- list, add hash to index (save because we are not yet mixed
+    for i=1,#t do
+        t[t[i]] = i
+    end
+    return t
+end
+
+function table.mirrored(t) -- hash, we need to make sure we don't mess up next
     local n = { }
     for k, v in next, t do
         n[v] = k
-- 
cgit v1.2.3