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#### 9.52.2.3 Signatures

Function signatures are specified with the `signature` pseudo-opcode, followed by a simple function signature imitating a C++-mangled function type: `F` followed by an optional `v`, then a sequence of `i`, `l`, `f`, and `d` characters to mark i32, i64, f32, and f64 parameters, respectively; followed by a final `E` to mark the end of the function signature.