Import and Linking

Import Cases

• import from local tbs file

import {func,class,var} from "./local/module"

.tbs will automatically append to import from file

• import from javascript built-ins

import {Math} from "javascript"

special tbs file where all javascript methods declared. it should be outside library source.

• import from compiled wasm binary

import {func,global_var,memory} from "./bin/module.wasm"

import from compiled wasm should parse wasm binary and generate an internal structure of module. this will allow conditional import of desired part of the module. imported wasm modules can be linked dynamically or statically. While linking statically, offsets of function index, import index, call index etc. need to be adjusted. unwanted functions from imported wasm should be removed and combine in to one wasm output.

Notes: All declare syntax outside library source should allocate imports. import from wasm binary need a wasm binary parser.

import strategy

Static linking

if a function is declared and available in binary importer ---> no import

if a function is declared and not available in binary importer ---> import

Dynamic linking

if a function is declared ---> import