Support querying an unnamed struct's name.

Author: maleadt

src/core/type.jl

@@ -193,8 +193,10 @@ end
 StructType(elems::Vector{<:LLVMType}; packed::Core.Bool=false, ctx::Context) =
     StructType(API.LLVMStructTypeInContext(ctx, elems, length(elems), convert(Bool, packed)))
 
-name(structtyp::StructType) =
-    unsafe_string(API.LLVMGetStructName(structtyp))
+function name(structtyp::StructType)
+    cstr = API.LLVMGetStructName(structtyp)
+    cstr == C_NULL ? nothing : unsafe_string(cstr)
+end
 ispacked(structtyp::StructType) =
     convert(Core.Bool, API.LLVMIsPackedStruct(structtyp))
 isopaque(structtyp::StructType) =

test/core.jl

@@ -122,6 +122,7 @@ end
         @test context(st) == ctx
         @test !ispacked(st)
         @test !isopaque(st)
+        @test name(st) === nothing
 
         let elem_it = elements(st)
             @test eltype(elem_it) == LLVMType