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Fix wasmer binary

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This commit is contained in:
Syrus
2019-12-20 22:57:18 -08:00
parent d36d883528
commit 8cff1adf5c
2 changed files with 45 additions and 15 deletions
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33
lib/runtime/src/lib.rs
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@ -164,14 +164,27 @@ pub enum Backend {
}
impl Backend {
/// Get a list of the currently enabled (via feature flag) backends.
pub fn variants() -> &'static [&'static str] {
&[
#[cfg(feature = "singlepass")]
"singlepass",
#[cfg(feature = "cranelift")]
"cranelift",
#[cfg(feature = "llvm")]
"llvm",
"auto",
]
}
/// Stable string representation of the backend.
/// It can be used as part of a cache key, for example.
pub fn to_string(&self) -> &'static str {
match self {
#[cfg(feature = "cranelift")]
Backend::Cranelift => "cranelift",
#[cfg(feature = "singlepass")]
Backend::Singlepass => "singlepass",
#[cfg(feature = "cranelift")]
Backend::Cranelift => "cranelift",
#[cfg(feature = "llvm")]
Backend::LLVM => "llvm",
Backend::Auto => "auto",
@ -192,6 +205,22 @@ impl Default for Backend {
}
}
impl std::str::FromStr for Backend {
type Err = String;
fn from_str(s: &str) -> Result<Backend, String> {
match s.to_lowercase().as_str() {
#[cfg(feature = "singlepass")]
"singlepass" => Ok(Backend::Singlepass),
#[cfg(feature = "cranelift")]
"cranelift" => Ok(Backend::Cranelift),
#[cfg(feature = "llvm")]
"llvm" => Ok(Backend::LLVM),
"auto" => Ok(Backend::Auto),
_ => Err(format!("The backend {} doesn't exist", s)),
}
}
}
/// Compile WebAssembly binary code into a [`Module`].
/// This function is useful if it is necessary to
/// compile a module before it can be instantiated