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std.DynLib: compile error if attempt to lookup a fn pointer with an unspecified callconv #19842

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std.DynLib: compile error if attempt to lookup a fn pointer with an unspecified callconv #19842

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13 changes: 13 additions & 0 deletions lib/std/dynamic_library.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,19 @@ pub const DynLib = struct {
}

pub fn lookup(self: *DynLib, comptime T: type, name: [:0]const u8) ?T {
switch (@typeInfo(T)) {
.Pointer => |pointer| {
switch (@typeInfo(pointer.child)) {
.Fn => |function| {
if (function.calling_convention == .Unspecified) {
@compileError("callconv cannot be .Unspecified for: " ++ @typeName(T));
}
},
else => {},
}
},
else => @compileError("expected a pointer type"),
}
return self.inner.lookup(T, name);
}
};
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