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-rw-r--r--spec/util_format_spec.lua1
-rw-r--r--util/format.lua6
2 files changed, 7 insertions, 0 deletions
diff --git a/spec/util_format_spec.lua b/spec/util_format_spec.lua
index b9652d19..82b70205 100644
--- a/spec/util_format_spec.lua
+++ b/spec/util_format_spec.lua
@@ -12,6 +12,7 @@ describe("util.format", function()
assert.equal("[true]", format("%d", true));
assert.equal("% [true]", format("%%", true));
assert.equal("{ }", format("%q", { }));
+ assert.equal("[1.5]", format("%d", 1.5));
end);
end);
end);
diff --git a/util/format.lua b/util/format.lua
index c31f599f..857bb694 100644
--- a/util/format.lua
+++ b/util/format.lua
@@ -7,6 +7,9 @@ local unpack = table.unpack or unpack; -- luacheck: ignore 113/unpack
local pack = require "util.table".pack; -- TODO table.pack in 5.2+
local type = type;
local dump = require "util.serialization".new("debug");
+local num_type = math.type;
+
+local expects_integer = num_type and { c = true, d = true, i = true, o = true, u = true, X = true, x = true, } or {};
local function format(formatstring, ...)
local args = pack(...);
@@ -43,6 +46,9 @@ local function format(formatstring, ...)
elseif type(arg) ~= "number" then -- arg isn't number as expected?
args[i] = tostring(arg);
spec = "[%s]";
+ elseif expects_integer[option] and num_type(arg) ~= "integer" then
+ args[i] = tostring(arg);
+ spec = "[%s]";
end
end
return spec;