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orb
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DSL for WebAssembly
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lib/orb/loop.ex
defmodule Orb.Loop do
@moduledoc false
defstruct [:identifier, :result, :body]
defimpl Orb.ToWat do
alias Orb.ToWat.Instructions
import Orb.ToWat.Helpers
def to_wat(
%Orb.Loop{identifier: identifier, result: result, body: body},
indent
) do
[
[
indent,
"(loop $",
to_string(identifier),
if(result, do: [" (result ", do_type(result), ")"], else: []),
"\n"
],
Enum.map(body, &[Instructions.do_wat(&1, " " <> indent), "\n"]),
[indent, ")"]
]
end
end
defmodule Branch do
defstruct [:identifier, :if]
defimpl Orb.ToWat do
def to_wat(
%Orb.Loop.Branch{identifier: identifier, if: nil},
indent
) do
[
indent,
"(br $",
to_string(identifier),
")"
]
end
def to_wat(
%Orb.Loop.Branch{identifier: identifier, if: condition},
indent
) do
[
indent,
Orb.ToWat.Instructions.do_wat(condition),
"\n",
indent,
"(br_if $",
to_string(identifier),
")"
]
end
end
end
end