1 files changed, 3 insertions, 11 deletions
diff --git a/xmake/core/base/math.lua b/xmake/core/base/math.lua
index 2cd53a21f..c46982328 100644
--- a/xmake/core/base/math.lua
+++ b/xmake/core/base/math.lua
@@ -24,16 +24,14 @@ local math = math or {}
 -- init constants
 math.nan   = math.log(-1)
 math.e     = math.exp(1)
+math.inf   = 1/0 -- @see http://lua-users.org/wiki/InfAndNanComparisons
 
 -- check a number is int
 --
 -- @returns true for int, otherwise false
 --
 function math:isint()
-
-    -- check
     assert(type(self) == "number", "number expacted")
-
     return self == math.floor(self) and self ~= math.huge and self ~= -math.huge
 end
 
@@ -42,13 +40,10 @@ end
 -- @returns 1 for inf,  -1 for -inf, otherwise false
 --
 function math:isinf()
-
-    -- check
     assert(type(self) == "number", "number expacted")
-
-    if self == math.huge then
+    if self == math.inf then
         return 1
-    elseif self == -math.huge then
+    elseif self == -math.inf then
         return -1
     else
         return false
@@ -60,10 +55,7 @@ end
 -- @returns true for nan, otherwise false
 --
 function math:isnan()
-
-    -- check
     assert(type(self) == "number", "number expacted")
-
     return self ~= self
 end