Add support for literals

Project.toml

@@ -1,6 +1,6 @@
 name = "GPUToolbox"
 uuid = "096a3bc2-3ced-46d0-87f4-dd12716f4bfc"
-version = "0.1.0"
+version = "0.2.0"
 
 [compat]
 julia = "1.10"

src/GPUToolbox.jl

@@ -2,5 +2,6 @@ module GPUToolbox
 
 include("simpleversion.jl") # exports SimpleVersion, @sv_str
 include("ccalls.jl") # exports @checked, @debug_ccall, @gcsafe_ccall
+include("literals.jl")
 
 end # module GPUToolbox

src/literals.jl

@@ -0,0 +1,10 @@
+export i8, i16, i32, u8, u16, u32
+# helper type for writing smaller than Int64 literals
+struct Literal{T} end
+Base.:(*)(x::Number, ::Type{Literal{T}}) where {T} = T(x)
+const i8 = Literal{Int8}
+const i16 = Literal{Int16}
+const i32 = Literal{Int32}
+const u8 = Literal{UInt8}
+const u16 = Literal{UInt16}
+const u32 = Literal{UInt32}

test/runtests.jl

@@ -43,4 +43,16 @@ using GPUToolbox
     end
 
     # TODO: @debug_ccall and @gcsafe_ccall tests
+
+    @testset "Literals" begin
+        @test 1i8 === Int8(1)
+        @test 1i16 === Int16(1)
+        @test 1i32 === Int32(1)
+        @test_throws InexactError 128i8
+
+        @test 1u8 === UInt8(1)
+        @test 1u16 === UInt16(1)
+        @test 1u32 === UInt32(1)
+        @test_throws InexactError 256u8
+    end
 end