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Use Option::unwrap_or_else.

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This commit is contained in:
Dan Gohman
2017-10-03 12:53:28 -07:00
parent d4438f4006
commit 97b877bb9c
1 changed files with 24 additions and 30 deletions
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54
lib/wasmstandalone/src/standalone.rs
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@@ -187,21 +187,18 @@ impl FuncEnvironment for StandaloneRuntime {
self.the_heap.unwrap(),
"multiple heaps not supported yet"
);
let grow_mem_func = match self.has_grow_memory {
Some(grow_mem_func) => grow_mem_func,
None => {
let sig_ref = pos.func.import_signature(Signature {
call_conv: CallConv::Native,
argument_bytes: None,
argument_types: vec![ArgumentType::new(I32)],
return_types: vec![ArgumentType::new(I32)],
});
pos.func.import_function(ExtFuncData {
name: FunctionName::new("grow_memory"),
signature: sig_ref,
})
}
};
let grow_mem_func = self.has_grow_memory.unwrap_or_else(|| {
let sig_ref = pos.func.import_signature(Signature {
call_conv: CallConv::Native,
argument_bytes: None,
argument_types: vec![ArgumentType::new(I32)],
return_types: vec![ArgumentType::new(I32)],
});
pos.func.import_function(ExtFuncData {
name: FunctionName::new("grow_memory"),
signature: sig_ref,
})
});
self.has_grow_memory = Some(grow_mem_func);
let call_inst = pos.ins().call(grow_mem_func, &[val]);
*pos.func.dfg.inst_results(call_inst).first().unwrap()
@@ -220,21 +217,18 @@ impl FuncEnvironment for StandaloneRuntime {
self.the_heap.unwrap(),
"multiple heaps not supported yet"
);
let cur_mem_func = match self.has_current_memory {
Some(cur_mem_func) => cur_mem_func,
None => {
let sig_ref = pos.func.import_signature(Signature {
call_conv: CallConv::Native,
argument_bytes: None,
argument_types: Vec::new(),
return_types: vec![ArgumentType::new(I32)],
});
pos.func.import_function(ExtFuncData {
name: FunctionName::new("current_memory"),
signature: sig_ref,
})
}
};
let cur_mem_func = self.has_current_memory.unwrap_or_else(|| {
let sig_ref = pos.func.import_signature(Signature {
call_conv: CallConv::Native,
argument_bytes: None,
argument_types: Vec::new(),
return_types: vec![ArgumentType::new(I32)],
});
pos.func.import_function(ExtFuncData {
name: FunctionName::new("current_memory"),
signature: sig_ref,
})
});
self.has_current_memory = Some(cur_mem_func);
let call_inst = pos.ins().call(cur_mem_func, &[]);
*pos.func.dfg.inst_results(call_inst).first().unwrap()