# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1616540133 -3600
# Node ID 377a9eaf7bef80c0f18f928c3c7c310bbbeb4c38
# Parent  c0c4431ab27be9d65b590f6b2bc5da29b9dd46fe
util.datamapper: Fix error on attempt to coerce nil to something

Turns falsy values into nil instead of nothing, which ensures this
function always has 1 return value, or table.insert({}) complains. Would
still happen on some unexpected input, but that's actually a good thing.

diff -r c0c4431ab27b -r 377a9eaf7bef teal-src/util/datamapper.tl
--- a/teal-src/util/datamapper.tl	Tue Mar 23 21:52:07 2021 +0100
+++ b/teal-src/util/datamapper.tl	Tue Mar 23 23:55:33 2021 +0100
@@ -37,6 +37,7 @@
 end
 
 local function totype(t : json_type_name, s : string) : any
+	if not s then return nil end
 	if t == "string" then
 		return s;
 	elseif t == "boolean" then
diff -r c0c4431ab27b -r 377a9eaf7bef util/datamapper.lua
--- a/util/datamapper.lua	Tue Mar 23 21:52:07 2021 +0100
+++ b/util/datamapper.lua	Tue Mar 23 23:55:33 2021 +0100
@@ -13,6 +13,9 @@
 end
 
 local function totype(t, s)
+	if not s then
+		return nil
+	end
 	if t == "string" then
 		return s
 	elseif t == "boolean" then