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@schleifner/asc-to-header

v0.2.0

Published

This tool is used for translate an AssemblyScript type definiton file to C++ header file.

Downloads

9

Readme

AssemblyScript C Header Translator

This tool is used for translate an AssemblyScript type definiton file to C++ header file.

build

npm install
npm run bundle

run

node --experimental-modules bin/Cli.js -f [input assemblyscript file] -o [target header file]
output:
C Header file

Example

example.ts:

enum Status{
    OK=0x1,
    FAIL=0x2
}

export declare function printStatus(Status:Status);

output:
example.h:


#ifndef __types_wasm_example_H__
#define __types_wasm_example_H__
extern "C" {
enum class Status {
  OK = 0x1,
  FAIL = 0x2,
};
__attribute__((import_module("example"))) void printStatus(Status Status);

}
#endif

cuation

Function pointer type

For function type declaration, when use it in the function parameter, should use the same name.
for example:
ASC

export type mycallback = (data: i32) => void;
export function callService(mycallback: i32):void;

then we can translate to:

using mycallback = void (*) (int data);
 __attribute__((import_module("test"))) void callService(mycallback mycallback);

but if we got asc like:
ASC

export type mycallback = (data: i32) => void;
export function callService(my_callback: i32):void;

then we can translate to:

using mycallback = void (*) (int data);
 __attribute__((import_module("test"))) void callService(int my_callback);

UserData Type

Some user data type, which is often used as C like API context, is usually a pointer type. Type UserDataType is designed as a reserved type. This type will be translated to uintptr_t in C++.