1756 lines
48 KiB
JavaScript
1756 lines
48 KiB
JavaScript
function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
|
||
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||
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
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||
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import { codeFrameFromSource } from "@webassemblyjs/helper-code-frame";
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import * as t from "@webassemblyjs/ast";
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import { parse32I } from "./number-literals";
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import { parseString } from "./string-literals";
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import { tokens, keywords } from "./tokenizer";
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||
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||
function hasPlugin(name) {
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if (name !== "wast") throw new Error("unknow plugin");
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||
return true;
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||
}
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||
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||
function isKeyword(token, id) {
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||
return token.type === tokens.keyword && token.value === id;
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||
}
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||
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||
function tokenToString(token) {
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||
if (token.type === "keyword") {
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||
return "keyword (".concat(token.value, ")");
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||
}
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||
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return token.type;
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||
}
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||
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function identifierFromToken(token) {
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||
var _token$loc = token.loc,
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end = _token$loc.end,
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start = _token$loc.start;
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return t.withLoc(t.identifier(token.value), end, start);
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}
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export function parse(tokensList, source) {
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var current = 0;
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||
var getUniqueName = t.getUniqueNameGenerator();
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||
var state = {
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||
registredExportedElements: []
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||
}; // But this time we're going to use recursion instead of a `while` loop. So we
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// define a `walk` function.
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function walk() {
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var token = tokensList[current];
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function eatToken() {
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token = tokensList[++current];
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}
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function getEndLoc() {
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var currentToken = token;
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if (typeof currentToken === "undefined") {
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var lastToken = tokensList[tokensList.length - 1];
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currentToken = lastToken;
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||
}
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||
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return currentToken.loc.end;
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||
}
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||
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function getStartLoc() {
|
||
return token.loc.start;
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||
}
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||
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function eatTokenOfType(type) {
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||
if (token.type !== type) {
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throw new Error("\n" + codeFrameFromSource(source, token.loc) + "Assertion error: expected token of type " + type + ", given " + tokenToString(token));
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||
}
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||
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eatToken();
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||
}
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||
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function parseExportIndex(token) {
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||
if (token.type === tokens.identifier) {
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var index = identifierFromToken(token);
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eatToken();
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return index;
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||
} else if (token.type === tokens.number) {
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||
var _index = t.numberLiteralFromRaw(token.value);
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||
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eatToken();
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return _index;
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} else {
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throw function () {
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return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "unknown export index" + ", given " + tokenToString(token));
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}();
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||
}
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||
}
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||
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function lookaheadAndCheck() {
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var len = arguments.length;
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for (var i = 0; i < len; i++) {
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var tokenAhead = tokensList[current + i];
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var expectedToken = i < 0 || arguments.length <= i ? undefined : arguments[i];
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||
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if (tokenAhead.type === "keyword") {
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||
if (isKeyword(tokenAhead, expectedToken) === false) {
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||
return false;
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||
}
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||
} else if (expectedToken !== tokenAhead.type) {
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||
return false;
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||
}
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||
}
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||
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||
return true;
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||
} // TODO(sven): there is probably a better way to do this
|
||
// can refactor it if it get out of hands
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||
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||
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function maybeIgnoreComment() {
|
||
if (typeof token === "undefined") {
|
||
// Ignore
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||
return;
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||
}
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||
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||
while (token.type === tokens.comment) {
|
||
eatToken();
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||
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||
if (typeof token === "undefined") {
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||
// Hit the end
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||
break;
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||
}
|
||
}
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||
}
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||
/**
|
||
* Parses a memory instruction
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||
*
|
||
* WAST:
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||
*
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||
* memory: ( memory <name>? <memory_sig> )
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||
* ( memory <name>? ( export <string> ) <...> )
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||
* ( memory <name>? ( import <string> <string> ) <memory_sig> )
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||
* ( memory <name>? ( export <string> )* ( data <string>* )
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||
* memory_sig: <nat> <nat>?
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||
*
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||
*/
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||
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||
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||
function parseMemory() {
|
||
var id = t.identifier(getUniqueName("memory"));
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||
var limits = t.limit(0);
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||
|
||
if (token.type === tokens.string || token.type === tokens.identifier) {
|
||
id = t.identifier(token.value);
|
||
eatToken();
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||
} else {
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||
id = t.withRaw(id, ""); // preserve anonymous
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||
}
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||
/**
|
||
* Maybe data
|
||
*/
|
||
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||
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||
if (lookaheadAndCheck(tokens.openParen, keywords.data)) {
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||
eatToken(); // (
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||
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||
eatToken(); // data
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||
// TODO(sven): do something with the data collected here
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||
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var stringInitializer = token.value;
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||
eatTokenOfType(tokens.string); // Update limits accordingly
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||
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limits = t.limit(stringInitializer.length);
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||
eatTokenOfType(tokens.closeParen);
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||
}
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||
/**
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||
* Maybe export
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||
*/
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||
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||
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||
if (lookaheadAndCheck(tokens.openParen, keywords.export)) {
|
||
eatToken(); // (
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||
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||
eatToken(); // export
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||
|
||
if (token.type !== tokens.string) {
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||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Expected string in export" + ", given " + tokenToString(token));
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||
}();
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||
}
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||
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var _name = token.value;
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||
eatToken();
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||
state.registredExportedElements.push({
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||
exportType: "Memory",
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||
name: _name,
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||
id: id
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||
});
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||
eatTokenOfType(tokens.closeParen);
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||
}
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||
/**
|
||
* Memory signature
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||
*/
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||
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||
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||
if (token.type === tokens.number) {
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||
limits = t.limit(parse32I(token.value));
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||
eatToken();
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||
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if (token.type === tokens.number) {
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limits.max = parse32I(token.value);
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||
eatToken();
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||
}
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||
}
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||
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||
return t.memory(limits, id);
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||
}
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/**
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||
* Parses a data section
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||
* https://webassembly.github.io/spec/core/text/modules.html#data-segments
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||
*
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||
* WAST:
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||
*
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||
* data: ( data <index>? <offset> <string> )
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||
*/
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||
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||
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||
function parseData() {
|
||
// optional memory index
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||
var memidx = 0;
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||
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||
if (token.type === tokens.number) {
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memidx = token.value;
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eatTokenOfType(tokens.number); // .
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||
}
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||
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||
eatTokenOfType(tokens.openParen);
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||
var offset;
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||
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||
if (token.type === tokens.valtype) {
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||
eatTokenOfType(tokens.valtype); // i32
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||
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||
eatTokenOfType(tokens.dot); // .
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||
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||
if (token.value !== "const") {
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||
throw new Error("constant expression required");
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||
}
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||
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||
eatTokenOfType(tokens.name); // const
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||
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||
var numberLiteral = t.numberLiteralFromRaw(token.value, "i32");
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offset = t.objectInstruction("const", "i32", [numberLiteral]);
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eatToken();
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||
eatTokenOfType(tokens.closeParen);
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||
} else {
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||
eatTokenOfType(tokens.name); // get_global
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||
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var _numberLiteral = t.numberLiteralFromRaw(token.value, "i32");
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||
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offset = t.instruction("get_global", [_numberLiteral]);
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||
eatToken();
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||
eatTokenOfType(tokens.closeParen);
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||
}
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||
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||
var byteArray = parseString(token.value);
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||
eatToken(); // "string"
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||
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||
return t.data(t.memIndexLiteral(memidx), offset, t.byteArray(byteArray));
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||
}
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||
/**
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||
* Parses a table instruction
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||
*
|
||
* WAST:
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||
*
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||
* table: ( table <name>? <table_type> )
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||
* ( table <name>? ( export <string> ) <...> )
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||
* ( table <name>? ( import <string> <string> ) <table_type> )
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||
* ( table <name>? ( export <string> )* <elem_type> ( elem <var>* ) )
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||
*
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||
* table_type: <nat> <nat>? <elem_type>
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||
* elem_type: anyfunc
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||
*
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||
* elem: ( elem <var>? (offset <instr>* ) <var>* )
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||
* ( elem <var>? <expr> <var>* )
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||
*/
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||
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||
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||
function parseTable() {
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||
var name = t.identifier(getUniqueName("table"));
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||
var limit = t.limit(0);
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||
var elemIndices = [];
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||
var elemType = "anyfunc";
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||
|
||
if (token.type === tokens.string || token.type === tokens.identifier) {
|
||
name = identifierFromToken(token);
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||
eatToken();
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||
} else {
|
||
name = t.withRaw(name, ""); // preserve anonymous
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||
}
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||
|
||
while (token.type !== tokens.closeParen) {
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||
/**
|
||
* Maybe export
|
||
*/
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.elem)) {
|
||
eatToken(); // (
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||
|
||
eatToken(); // elem
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||
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||
while (token.type === tokens.identifier) {
|
||
elemIndices.push(t.identifier(token.value));
|
||
eatToken();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
} else if (lookaheadAndCheck(tokens.openParen, keywords.export)) {
|
||
eatToken(); // (
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||
|
||
eatToken(); // export
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||
|
||
if (token.type !== tokens.string) {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Expected string in export" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
var exportName = token.value;
|
||
eatToken();
|
||
state.registredExportedElements.push({
|
||
exportType: "Table",
|
||
name: exportName,
|
||
id: name
|
||
});
|
||
eatTokenOfType(tokens.closeParen);
|
||
} else if (isKeyword(token, keywords.anyfunc)) {
|
||
// It's the default value, we can ignore it
|
||
eatToken(); // anyfunc
|
||
} else if (token.type === tokens.number) {
|
||
/**
|
||
* Table type
|
||
*/
|
||
var min = parseInt(token.value);
|
||
eatToken();
|
||
|
||
if (token.type === tokens.number) {
|
||
var max = parseInt(token.value);
|
||
eatToken();
|
||
limit = t.limit(min, max);
|
||
} else {
|
||
limit = t.limit(min);
|
||
}
|
||
|
||
eatToken();
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
}
|
||
|
||
if (elemIndices.length > 0) {
|
||
return t.table(elemType, limit, name, elemIndices);
|
||
} else {
|
||
return t.table(elemType, limit, name);
|
||
}
|
||
}
|
||
/**
|
||
* Parses an import statement
|
||
*
|
||
* WAST:
|
||
*
|
||
* import: ( import <string> <string> <imkind> )
|
||
* imkind: ( func <name>? <func_sig> )
|
||
* ( global <name>? <global_sig> )
|
||
* ( table <name>? <table_sig> )
|
||
* ( memory <name>? <memory_sig> )
|
||
*
|
||
* global_sig: <type> | ( mut <type> )
|
||
*/
|
||
|
||
|
||
function parseImport() {
|
||
if (token.type !== tokens.string) {
|
||
throw new Error("Expected a string, " + token.type + " given.");
|
||
}
|
||
|
||
var moduleName = token.value;
|
||
eatToken();
|
||
|
||
if (token.type !== tokens.string) {
|
||
throw new Error("Expected a string, " + token.type + " given.");
|
||
}
|
||
|
||
var name = token.value;
|
||
eatToken();
|
||
eatTokenOfType(tokens.openParen);
|
||
var descr;
|
||
|
||
if (isKeyword(token, keywords.func)) {
|
||
eatToken(); // keyword
|
||
|
||
var fnParams = [];
|
||
var fnResult = [];
|
||
var typeRef;
|
||
var fnName = t.identifier(getUniqueName("func"));
|
||
|
||
if (token.type === tokens.identifier) {
|
||
fnName = identifierFromToken(token);
|
||
eatToken();
|
||
}
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken();
|
||
|
||
if (lookaheadAndCheck(keywords.type) === true) {
|
||
eatToken();
|
||
typeRef = parseTypeReference();
|
||
} else if (lookaheadAndCheck(keywords.param) === true) {
|
||
eatToken();
|
||
fnParams.push.apply(fnParams, _toConsumableArray(parseFuncParam()));
|
||
} else if (lookaheadAndCheck(keywords.result) === true) {
|
||
eatToken();
|
||
fnResult.push.apply(fnResult, _toConsumableArray(parseFuncResult()));
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in import of type" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
if (typeof fnName === "undefined") {
|
||
throw new Error("Imported function must have a name");
|
||
}
|
||
|
||
descr = t.funcImportDescr(fnName, typeRef !== undefined ? typeRef : t.signature(fnParams, fnResult));
|
||
} else if (isKeyword(token, keywords.global)) {
|
||
eatToken(); // keyword
|
||
|
||
if (token.type === tokens.openParen) {
|
||
eatToken(); // (
|
||
|
||
eatTokenOfType(tokens.keyword); // mut keyword
|
||
|
||
var valtype = token.value;
|
||
eatToken();
|
||
descr = t.globalType(valtype, "var");
|
||
eatTokenOfType(tokens.closeParen);
|
||
} else {
|
||
var _valtype = token.value;
|
||
eatTokenOfType(tokens.valtype);
|
||
descr = t.globalType(_valtype, "const");
|
||
}
|
||
} else if (isKeyword(token, keywords.memory) === true) {
|
||
eatToken(); // Keyword
|
||
|
||
descr = parseMemory();
|
||
} else if (isKeyword(token, keywords.table) === true) {
|
||
eatToken(); // Keyword
|
||
|
||
descr = parseTable();
|
||
} else {
|
||
throw new Error("Unsupported import type: " + tokenToString(token));
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.moduleImport(moduleName, name, descr);
|
||
}
|
||
/**
|
||
* Parses a block instruction
|
||
*
|
||
* WAST:
|
||
*
|
||
* expr: ( block <name>? <block_sig> <instr>* )
|
||
* instr: block <name>? <block_sig> <instr>* end <name>?
|
||
* block_sig : ( result <type>* )*
|
||
*
|
||
*/
|
||
|
||
|
||
function parseBlock() {
|
||
var label = t.identifier(getUniqueName("block"));
|
||
var blockResult = null;
|
||
var instr = [];
|
||
|
||
if (token.type === tokens.identifier) {
|
||
label = identifierFromToken(token);
|
||
eatToken();
|
||
} else {
|
||
label = t.withRaw(label, ""); // preserve anonymous
|
||
}
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken();
|
||
|
||
if (lookaheadAndCheck(keywords.result) === true) {
|
||
eatToken();
|
||
blockResult = token.value;
|
||
eatToken();
|
||
} else if (lookaheadAndCheck(tokens.name) === true || lookaheadAndCheck(tokens.valtype) === true || token.type === "keyword" // is any keyword
|
||
) {
|
||
// Instruction
|
||
instr.push(parseFuncInstr());
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in block body of type" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
maybeIgnoreComment();
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
return t.blockInstruction(label, instr, blockResult);
|
||
}
|
||
/**
|
||
* Parses a if instruction
|
||
*
|
||
* WAST:
|
||
*
|
||
* expr:
|
||
* ( if <name>? <block_sig> ( then <instr>* ) ( else <instr>* )? )
|
||
* ( if <name>? <block_sig> <expr>+ ( then <instr>* ) ( else <instr>* )? )
|
||
*
|
||
* instr:
|
||
* if <name>? <block_sig> <instr>* end <name>?
|
||
* if <name>? <block_sig> <instr>* else <name>? <instr>* end <name>?
|
||
*
|
||
* block_sig : ( result <type>* )*
|
||
*
|
||
*/
|
||
|
||
|
||
function parseIf() {
|
||
var blockResult = null;
|
||
var label = t.identifier(getUniqueName("if"));
|
||
var testInstrs = [];
|
||
var consequent = [];
|
||
var alternate = [];
|
||
|
||
if (token.type === tokens.identifier) {
|
||
label = identifierFromToken(token);
|
||
eatToken();
|
||
} else {
|
||
label = t.withRaw(label, ""); // preserve anonymous
|
||
}
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken(); // (
|
||
|
||
/**
|
||
* Block signature
|
||
*/
|
||
|
||
if (isKeyword(token, keywords.result) === true) {
|
||
eatToken();
|
||
blockResult = token.value;
|
||
eatTokenOfType(tokens.valtype);
|
||
eatTokenOfType(tokens.closeParen);
|
||
continue;
|
||
}
|
||
/**
|
||
* Then
|
||
*/
|
||
|
||
|
||
if (isKeyword(token, keywords.then) === true) {
|
||
eatToken(); // then
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken(); // Instruction
|
||
|
||
if (lookaheadAndCheck(tokens.name) === true || lookaheadAndCheck(tokens.valtype) === true || token.type === "keyword" // is any keyword
|
||
) {
|
||
consequent.push(parseFuncInstr());
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in consequent body of type" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
continue;
|
||
}
|
||
/**
|
||
* Alternate
|
||
*/
|
||
|
||
|
||
if (isKeyword(token, keywords.else)) {
|
||
eatToken(); // else
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken(); // Instruction
|
||
|
||
if (lookaheadAndCheck(tokens.name) === true || lookaheadAndCheck(tokens.valtype) === true || token.type === "keyword" // is any keyword
|
||
) {
|
||
alternate.push(parseFuncInstr());
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in alternate body of type" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
continue;
|
||
}
|
||
/**
|
||
* Test instruction
|
||
*/
|
||
|
||
|
||
if (lookaheadAndCheck(tokens.name) === true || lookaheadAndCheck(tokens.valtype) === true || token.type === "keyword" // is any keyword
|
||
) {
|
||
testInstrs.push(parseFuncInstr());
|
||
eatTokenOfType(tokens.closeParen);
|
||
continue;
|
||
}
|
||
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in if body" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
return t.ifInstruction(label, testInstrs, blockResult, consequent, alternate);
|
||
}
|
||
/**
|
||
* Parses a loop instruction
|
||
*
|
||
* WAT:
|
||
*
|
||
* blockinstr :: 'loop' I:label rt:resulttype (in:instr*) 'end' id?
|
||
*
|
||
* WAST:
|
||
*
|
||
* instr :: loop <name>? <block_sig> <instr>* end <name>?
|
||
* expr :: ( loop <name>? <block_sig> <instr>* )
|
||
* block_sig :: ( result <type>* )*
|
||
*
|
||
*/
|
||
|
||
|
||
function parseLoop() {
|
||
var label = t.identifier(getUniqueName("loop"));
|
||
var blockResult;
|
||
var instr = [];
|
||
|
||
if (token.type === tokens.identifier) {
|
||
label = identifierFromToken(token);
|
||
eatToken();
|
||
} else {
|
||
label = t.withRaw(label, ""); // preserve anonymous
|
||
}
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken();
|
||
|
||
if (lookaheadAndCheck(keywords.result) === true) {
|
||
eatToken();
|
||
blockResult = token.value;
|
||
eatToken();
|
||
} else if (lookaheadAndCheck(tokens.name) === true || lookaheadAndCheck(tokens.valtype) === true || token.type === "keyword" // is any keyword
|
||
) {
|
||
// Instruction
|
||
instr.push(parseFuncInstr());
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in loop body" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
return t.loopInstruction(label, blockResult, instr);
|
||
}
|
||
|
||
function parseCallIndirect() {
|
||
var typeRef;
|
||
var params = [];
|
||
var results = [];
|
||
var instrs = [];
|
||
|
||
while (token.type !== tokens.closeParen) {
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.type)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // type
|
||
|
||
typeRef = parseTypeReference();
|
||
} else if (lookaheadAndCheck(tokens.openParen, keywords.param)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // param
|
||
|
||
/**
|
||
* Params can be empty:
|
||
* (params)`
|
||
*/
|
||
|
||
if (token.type !== tokens.closeParen) {
|
||
params.push.apply(params, _toConsumableArray(parseFuncParam()));
|
||
}
|
||
} else if (lookaheadAndCheck(tokens.openParen, keywords.result)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // result
|
||
|
||
/**
|
||
* Results can be empty:
|
||
* (result)`
|
||
*/
|
||
|
||
if (token.type !== tokens.closeParen) {
|
||
results.push.apply(results, _toConsumableArray(parseFuncResult()));
|
||
}
|
||
} else {
|
||
eatTokenOfType(tokens.openParen);
|
||
instrs.push(parseFuncInstr());
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
return t.callIndirectInstruction(typeRef !== undefined ? typeRef : t.signature(params, results), instrs);
|
||
}
|
||
/**
|
||
* Parses an export instruction
|
||
*
|
||
* WAT:
|
||
*
|
||
* export: ( export <string> <exkind> )
|
||
* exkind: ( func <var> )
|
||
* ( global <var> )
|
||
* ( table <var> )
|
||
* ( memory <var> )
|
||
* var: <nat> | <name>
|
||
*
|
||
*/
|
||
|
||
|
||
function parseExport() {
|
||
if (token.type !== tokens.string) {
|
||
throw new Error("Expected string after export, got: " + token.type);
|
||
}
|
||
|
||
var name = token.value;
|
||
eatToken();
|
||
var moduleExportDescr = parseModuleExportDescr();
|
||
return t.moduleExport(name, moduleExportDescr);
|
||
}
|
||
|
||
function parseModuleExportDescr() {
|
||
var startLoc = getStartLoc();
|
||
var type = "";
|
||
var index;
|
||
eatTokenOfType(tokens.openParen);
|
||
|
||
while (token.type !== tokens.closeParen) {
|
||
if (isKeyword(token, keywords.func)) {
|
||
type = "Func";
|
||
eatToken();
|
||
index = parseExportIndex(token);
|
||
} else if (isKeyword(token, keywords.table)) {
|
||
type = "Table";
|
||
eatToken();
|
||
index = parseExportIndex(token);
|
||
} else if (isKeyword(token, keywords.global)) {
|
||
type = "Global";
|
||
eatToken();
|
||
index = parseExportIndex(token);
|
||
} else if (isKeyword(token, keywords.memory)) {
|
||
type = "Memory";
|
||
eatToken();
|
||
index = parseExportIndex(token);
|
||
}
|
||
|
||
eatToken();
|
||
}
|
||
|
||
if (type === "") {
|
||
throw new Error("Unknown export type");
|
||
}
|
||
|
||
if (index === undefined) {
|
||
throw new Error("Exported function must have a name");
|
||
}
|
||
|
||
var node = t.moduleExportDescr(type, index);
|
||
var endLoc = getEndLoc();
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(node, endLoc, startLoc);
|
||
}
|
||
|
||
function parseModule() {
|
||
var name = null;
|
||
var isBinary = false;
|
||
var isQuote = false;
|
||
var moduleFields = [];
|
||
|
||
if (token.type === tokens.identifier) {
|
||
name = token.value;
|
||
eatToken();
|
||
}
|
||
|
||
if (hasPlugin("wast") && token.type === tokens.name && token.value === "binary") {
|
||
eatToken();
|
||
isBinary = true;
|
||
}
|
||
|
||
if (hasPlugin("wast") && token.type === tokens.name && token.value === "quote") {
|
||
eatToken();
|
||
isQuote = true;
|
||
}
|
||
|
||
if (isBinary === true) {
|
||
var blob = [];
|
||
|
||
while (token.type === tokens.string) {
|
||
blob.push(token.value);
|
||
eatToken();
|
||
maybeIgnoreComment();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.binaryModule(name, blob);
|
||
}
|
||
|
||
if (isQuote === true) {
|
||
var string = [];
|
||
|
||
while (token.type === tokens.string) {
|
||
string.push(token.value);
|
||
eatToken();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.quoteModule(name, string);
|
||
}
|
||
|
||
while (token.type !== tokens.closeParen) {
|
||
moduleFields.push(walk());
|
||
|
||
if (state.registredExportedElements.length > 0) {
|
||
state.registredExportedElements.forEach(function (decl) {
|
||
moduleFields.push(t.moduleExport(decl.name, t.moduleExportDescr(decl.exportType, decl.id)));
|
||
});
|
||
state.registredExportedElements = [];
|
||
}
|
||
|
||
token = tokensList[current];
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.module(name, moduleFields);
|
||
}
|
||
/**
|
||
* Parses the arguments of an instruction
|
||
*/
|
||
|
||
|
||
function parseFuncInstrArguments(signature) {
|
||
var args = [];
|
||
var namedArgs = {};
|
||
var signaturePtr = 0;
|
||
|
||
while (token.type === tokens.name || isKeyword(token, keywords.offset)) {
|
||
var key = token.value;
|
||
eatToken();
|
||
eatTokenOfType(tokens.equal);
|
||
var value = void 0;
|
||
|
||
if (token.type === tokens.number) {
|
||
value = t.numberLiteralFromRaw(token.value);
|
||
} else {
|
||
throw new Error("Unexpected type for argument: " + token.type);
|
||
}
|
||
|
||
namedArgs[key] = value;
|
||
eatToken();
|
||
} // $FlowIgnore
|
||
|
||
|
||
var signatureLength = signature.vector ? Infinity : signature.length;
|
||
|
||
while (token.type !== tokens.closeParen && ( // $FlowIgnore
|
||
token.type === tokens.openParen || signaturePtr < signatureLength)) {
|
||
if (token.type === tokens.identifier) {
|
||
args.push(t.identifier(token.value));
|
||
eatToken();
|
||
} else if (token.type === tokens.valtype) {
|
||
// Handle locals
|
||
args.push(t.valtypeLiteral(token.value));
|
||
eatToken();
|
||
} else if (token.type === tokens.string) {
|
||
args.push(t.stringLiteral(token.value));
|
||
eatToken();
|
||
} else if (token.type === tokens.number) {
|
||
args.push( // TODO(sven): refactor the type signature handling
|
||
// https://github.com/xtuc/webassemblyjs/pull/129 is a good start
|
||
t.numberLiteralFromRaw(token.value, // $FlowIgnore
|
||
signature[signaturePtr] || "f64")); // $FlowIgnore
|
||
|
||
if (!signature.vector) {
|
||
++signaturePtr;
|
||
}
|
||
|
||
eatToken();
|
||
} else if (token.type === tokens.openParen) {
|
||
/**
|
||
* Maybe some nested instructions
|
||
*/
|
||
eatToken(); // Instruction
|
||
|
||
if (lookaheadAndCheck(tokens.name) === true || lookaheadAndCheck(tokens.valtype) === true || token.type === "keyword" // is any keyword
|
||
) {
|
||
// $FlowIgnore
|
||
args.push(parseFuncInstr());
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in nested instruction" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
if (token.type === tokens.closeParen) {
|
||
eatToken();
|
||
}
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in instruction argument" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
}
|
||
|
||
return {
|
||
args: args,
|
||
namedArgs: namedArgs
|
||
};
|
||
}
|
||
/**
|
||
* Parses an instruction
|
||
*
|
||
* WAT:
|
||
*
|
||
* instr :: plaininst
|
||
* blockinstr
|
||
*
|
||
* blockinstr :: 'block' I:label rt:resulttype (in:instr*) 'end' id?
|
||
* 'loop' I:label rt:resulttype (in:instr*) 'end' id?
|
||
* 'if' I:label rt:resulttype (in:instr*) 'else' id? (in2:intr*) 'end' id?
|
||
*
|
||
* plaininst :: 'unreachable'
|
||
* 'nop'
|
||
* 'br' l:labelidx
|
||
* 'br_if' l:labelidx
|
||
* 'br_table' l*:vec(labelidx) ln:labelidx
|
||
* 'return'
|
||
* 'call' x:funcidx
|
||
* 'call_indirect' x, I:typeuse
|
||
*
|
||
* WAST:
|
||
*
|
||
* instr:
|
||
* <expr>
|
||
* <op>
|
||
* block <name>? <block_sig> <instr>* end <name>?
|
||
* loop <name>? <block_sig> <instr>* end <name>?
|
||
* if <name>? <block_sig> <instr>* end <name>?
|
||
* if <name>? <block_sig> <instr>* else <name>? <instr>* end <name>?
|
||
*
|
||
* expr:
|
||
* ( <op> )
|
||
* ( <op> <expr>+ )
|
||
* ( block <name>? <block_sig> <instr>* )
|
||
* ( loop <name>? <block_sig> <instr>* )
|
||
* ( if <name>? <block_sig> ( then <instr>* ) ( else <instr>* )? )
|
||
* ( if <name>? <block_sig> <expr>+ ( then <instr>* ) ( else <instr>* )? )
|
||
*
|
||
* op:
|
||
* unreachable
|
||
* nop
|
||
* br <var>
|
||
* br_if <var>
|
||
* br_table <var>+
|
||
* return
|
||
* call <var>
|
||
* call_indirect <func_sig>
|
||
* drop
|
||
* select
|
||
* get_local <var>
|
||
* set_local <var>
|
||
* tee_local <var>
|
||
* get_global <var>
|
||
* set_global <var>
|
||
* <type>.load((8|16|32)_<sign>)? <offset>? <align>?
|
||
* <type>.store(8|16|32)? <offset>? <align>?
|
||
* current_memory
|
||
* grow_memory
|
||
* <type>.const <value>
|
||
* <type>.<unop>
|
||
* <type>.<binop>
|
||
* <type>.<testop>
|
||
* <type>.<relop>
|
||
* <type>.<cvtop>/<type>
|
||
*
|
||
* func_type: ( type <var> )? <param>* <result>*
|
||
*/
|
||
|
||
|
||
function parseFuncInstr() {
|
||
var startLoc = getStartLoc();
|
||
maybeIgnoreComment();
|
||
/**
|
||
* A simple instruction
|
||
*/
|
||
|
||
if (token.type === tokens.name || token.type === tokens.valtype) {
|
||
var _name2 = token.value;
|
||
var object;
|
||
eatToken();
|
||
|
||
if (token.type === tokens.dot) {
|
||
object = _name2;
|
||
eatToken();
|
||
|
||
if (token.type !== tokens.name) {
|
||
throw new TypeError("Unknown token: " + token.type + ", name expected");
|
||
}
|
||
|
||
_name2 = token.value;
|
||
eatToken();
|
||
}
|
||
|
||
if (token.type === tokens.closeParen) {
|
||
var _endLoc = token.loc.end;
|
||
|
||
if (typeof object === "undefined") {
|
||
return t.withLoc(t.instruction(_name2), _endLoc, startLoc);
|
||
} else {
|
||
return t.withLoc(t.objectInstruction(_name2, object, []), _endLoc, startLoc);
|
||
}
|
||
}
|
||
|
||
var signature = t.signatureForOpcode(object || "", _name2);
|
||
|
||
var _parseFuncInstrArgume = parseFuncInstrArguments(signature),
|
||
_args = _parseFuncInstrArgume.args,
|
||
_namedArgs = _parseFuncInstrArgume.namedArgs;
|
||
|
||
var endLoc = token.loc.end;
|
||
|
||
if (typeof object === "undefined") {
|
||
return t.withLoc(t.instruction(_name2, _args, _namedArgs), endLoc, startLoc);
|
||
} else {
|
||
return t.withLoc(t.objectInstruction(_name2, object, _args, _namedArgs), endLoc, startLoc);
|
||
}
|
||
} else if (isKeyword(token, keywords.loop)) {
|
||
/**
|
||
* Else a instruction with a keyword (loop or block)
|
||
*/
|
||
eatToken(); // keyword
|
||
|
||
return parseLoop();
|
||
} else if (isKeyword(token, keywords.block)) {
|
||
eatToken(); // keyword
|
||
|
||
return parseBlock();
|
||
} else if (isKeyword(token, keywords.call_indirect)) {
|
||
eatToken(); // keyword
|
||
|
||
return parseCallIndirect();
|
||
} else if (isKeyword(token, keywords.call)) {
|
||
eatToken(); // keyword
|
||
|
||
var index;
|
||
|
||
if (token.type === tokens.identifier) {
|
||
index = identifierFromToken(token);
|
||
eatToken();
|
||
} else if (token.type === tokens.number) {
|
||
index = t.indexLiteral(token.value);
|
||
eatToken();
|
||
}
|
||
|
||
var instrArgs = []; // Nested instruction
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken();
|
||
instrArgs.push(parseFuncInstr());
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
if (typeof index === "undefined") {
|
||
throw new Error("Missing argument in call instruciton");
|
||
}
|
||
|
||
if (instrArgs.length > 0) {
|
||
return t.callInstruction(index, instrArgs);
|
||
} else {
|
||
return t.callInstruction(index);
|
||
}
|
||
} else if (isKeyword(token, keywords.if)) {
|
||
eatToken(); // Keyword
|
||
|
||
return parseIf();
|
||
} else if (isKeyword(token, keywords.module) && hasPlugin("wast")) {
|
||
eatToken(); // In WAST you can have a module as an instruction's argument
|
||
// we will cast it into a instruction to not break the flow
|
||
// $FlowIgnore
|
||
|
||
var module = parseModule();
|
||
return module;
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected instruction in function body" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
}
|
||
/*
|
||
* Parses a function
|
||
*
|
||
* WAT:
|
||
*
|
||
* functype :: ( 'func' t1:vec(param) t2:vec(result) )
|
||
* param :: ( 'param' id? t:valtype )
|
||
* result :: ( 'result' t:valtype )
|
||
*
|
||
* WAST:
|
||
*
|
||
* func :: ( func <name>? <func_sig> <local>* <instr>* )
|
||
* ( func <name>? ( export <string> ) <...> )
|
||
* ( func <name>? ( import <string> <string> ) <func_sig> )
|
||
* func_sig :: ( type <var> )? <param>* <result>*
|
||
* param :: ( param <type>* ) | ( param <name> <type> )
|
||
* result :: ( result <type>* )
|
||
* local :: ( local <type>* ) | ( local <name> <type> )
|
||
*
|
||
*/
|
||
|
||
|
||
function parseFunc() {
|
||
var fnName = t.identifier(getUniqueName("func"));
|
||
var typeRef;
|
||
var fnBody = [];
|
||
var fnParams = [];
|
||
var fnResult = []; // name
|
||
|
||
if (token.type === tokens.identifier) {
|
||
fnName = identifierFromToken(token);
|
||
eatToken();
|
||
} else {
|
||
fnName = t.withRaw(fnName, ""); // preserve anonymous
|
||
}
|
||
|
||
maybeIgnoreComment();
|
||
|
||
while (token.type === tokens.openParen || token.type === tokens.name || token.type === tokens.valtype) {
|
||
// Instructions without parens
|
||
if (token.type === tokens.name || token.type === tokens.valtype) {
|
||
fnBody.push(parseFuncInstr());
|
||
continue;
|
||
}
|
||
|
||
eatToken();
|
||
|
||
if (lookaheadAndCheck(keywords.param) === true) {
|
||
eatToken();
|
||
fnParams.push.apply(fnParams, _toConsumableArray(parseFuncParam()));
|
||
} else if (lookaheadAndCheck(keywords.result) === true) {
|
||
eatToken();
|
||
fnResult.push.apply(fnResult, _toConsumableArray(parseFuncResult()));
|
||
} else if (lookaheadAndCheck(keywords.export) === true) {
|
||
eatToken();
|
||
parseFuncExport(fnName);
|
||
} else if (lookaheadAndCheck(keywords.type) === true) {
|
||
eatToken();
|
||
typeRef = parseTypeReference();
|
||
} else if (lookaheadAndCheck(tokens.name) === true || lookaheadAndCheck(tokens.valtype) === true || token.type === "keyword" // is any keyword
|
||
) {
|
||
// Instruction
|
||
fnBody.push(parseFuncInstr());
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in func body" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
return t.func(fnName, typeRef !== undefined ? typeRef : t.signature(fnParams, fnResult), fnBody);
|
||
}
|
||
/**
|
||
* Parses shorthand export in func
|
||
*
|
||
* export :: ( export <string> )
|
||
*/
|
||
|
||
|
||
function parseFuncExport(funcId) {
|
||
if (token.type !== tokens.string) {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Function export expected a string" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
var name = token.value;
|
||
eatToken();
|
||
/**
|
||
* Func export shorthand, we trait it as a syntaxic sugar.
|
||
* A export ModuleField will be added later.
|
||
*
|
||
* We give the anonymous function a generated name and export it.
|
||
*/
|
||
|
||
var id = t.identifier(funcId.value);
|
||
state.registredExportedElements.push({
|
||
exportType: "Func",
|
||
name: name,
|
||
id: id
|
||
});
|
||
}
|
||
/**
|
||
* Parses a type instruction
|
||
*
|
||
* WAST:
|
||
*
|
||
* typedef: ( type <name>? ( func <param>* <result>* ) )
|
||
*/
|
||
|
||
|
||
function parseType() {
|
||
var id;
|
||
var params = [];
|
||
var result = [];
|
||
|
||
if (token.type === tokens.identifier) {
|
||
id = identifierFromToken(token);
|
||
eatToken();
|
||
}
|
||
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.func)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // func
|
||
|
||
if (token.type === tokens.closeParen) {
|
||
eatToken(); // function with an empty signature, we can abort here
|
||
|
||
return t.typeInstruction(id, t.signature([], []));
|
||
}
|
||
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.param)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // param
|
||
|
||
params = parseFuncParam();
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.result)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // result
|
||
|
||
result = parseFuncResult();
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
return t.typeInstruction(id, t.signature(params, result));
|
||
}
|
||
/**
|
||
* Parses a function result
|
||
*
|
||
* WAST:
|
||
*
|
||
* result :: ( result <type>* )
|
||
*/
|
||
|
||
|
||
function parseFuncResult() {
|
||
var results = [];
|
||
|
||
while (token.type !== tokens.closeParen) {
|
||
if (token.type !== tokens.valtype) {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unexpected token in func result" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
var valtype = token.value;
|
||
eatToken();
|
||
results.push(valtype);
|
||
}
|
||
|
||
return results;
|
||
}
|
||
/**
|
||
* Parses a type reference
|
||
*
|
||
*/
|
||
|
||
|
||
function parseTypeReference() {
|
||
var ref;
|
||
|
||
if (token.type === tokens.identifier) {
|
||
ref = identifierFromToken(token);
|
||
eatToken();
|
||
} else if (token.type === tokens.number) {
|
||
ref = t.numberLiteralFromRaw(token.value);
|
||
eatToken();
|
||
}
|
||
|
||
return ref;
|
||
}
|
||
/**
|
||
* Parses a global instruction
|
||
*
|
||
* WAST:
|
||
*
|
||
* global: ( global <name>? <global_sig> <instr>* )
|
||
* ( global <name>? ( export <string> ) <...> )
|
||
* ( global <name>? ( import <string> <string> ) <global_sig> )
|
||
*
|
||
* global_sig: <type> | ( mut <type> )
|
||
*
|
||
*/
|
||
|
||
|
||
function parseGlobal() {
|
||
var name = t.identifier(getUniqueName("global"));
|
||
var type; // Keep informations in case of a shorthand import
|
||
|
||
var importing = null;
|
||
maybeIgnoreComment();
|
||
|
||
if (token.type === tokens.identifier) {
|
||
name = identifierFromToken(token);
|
||
eatToken();
|
||
} else {
|
||
name = t.withRaw(name, ""); // preserve anonymous
|
||
}
|
||
/**
|
||
* maybe export
|
||
*/
|
||
|
||
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.export)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // export
|
||
|
||
var exportName = token.value;
|
||
eatTokenOfType(tokens.string);
|
||
state.registredExportedElements.push({
|
||
exportType: "Global",
|
||
name: exportName,
|
||
id: name
|
||
});
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
/**
|
||
* maybe import
|
||
*/
|
||
|
||
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.import)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // import
|
||
|
||
var moduleName = token.value;
|
||
eatTokenOfType(tokens.string);
|
||
var _name3 = token.value;
|
||
eatTokenOfType(tokens.string);
|
||
importing = {
|
||
module: moduleName,
|
||
name: _name3,
|
||
descr: undefined
|
||
};
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
/**
|
||
* global_sig
|
||
*/
|
||
|
||
|
||
if (token.type === tokens.valtype) {
|
||
type = t.globalType(token.value, "const");
|
||
eatToken();
|
||
} else if (token.type === tokens.openParen) {
|
||
eatToken(); // (
|
||
|
||
if (isKeyword(token, keywords.mut) === false) {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unsupported global type, expected mut" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
eatToken(); // mut
|
||
|
||
type = t.globalType(token.value, "var");
|
||
eatToken();
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
if (type === undefined) {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Could not determine global type" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
maybeIgnoreComment();
|
||
var init = [];
|
||
|
||
if (importing != null) {
|
||
importing.descr = type;
|
||
init.push(t.moduleImport(importing.module, importing.name, importing.descr));
|
||
}
|
||
/**
|
||
* instr*
|
||
*/
|
||
|
||
|
||
while (token.type === tokens.openParen) {
|
||
eatToken();
|
||
init.push(parseFuncInstr());
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
return t.global(type, init, name);
|
||
}
|
||
/**
|
||
* Parses a function param
|
||
*
|
||
* WAST:
|
||
*
|
||
* param :: ( param <type>* ) | ( param <name> <type> )
|
||
*/
|
||
|
||
|
||
function parseFuncParam() {
|
||
var params = [];
|
||
var id;
|
||
var valtype;
|
||
|
||
if (token.type === tokens.identifier) {
|
||
id = token.value;
|
||
eatToken();
|
||
}
|
||
|
||
if (token.type === tokens.valtype) {
|
||
valtype = token.value;
|
||
eatToken();
|
||
params.push({
|
||
id: id,
|
||
valtype: valtype
|
||
});
|
||
/**
|
||
* Shorthand notation for multiple anonymous parameters
|
||
* @see https://webassembly.github.io/spec/core/text/types.html#function-types
|
||
* @see https://github.com/xtuc/webassemblyjs/issues/6
|
||
*/
|
||
|
||
if (id === undefined) {
|
||
while (token.type === tokens.valtype) {
|
||
valtype = token.value;
|
||
eatToken();
|
||
params.push({
|
||
id: undefined,
|
||
valtype: valtype
|
||
});
|
||
}
|
||
}
|
||
} else {// ignore
|
||
}
|
||
|
||
return params;
|
||
}
|
||
/**
|
||
* Parses an element segments instruction
|
||
*
|
||
* WAST:
|
||
*
|
||
* elem: ( elem <var>? (offset <instr>* ) <var>* )
|
||
* ( elem <var>? <expr> <var>* )
|
||
*
|
||
* var: <nat> | <name>
|
||
*/
|
||
|
||
|
||
function parseElem() {
|
||
var tableIndex = t.indexLiteral(0);
|
||
var offset = [];
|
||
var funcs = [];
|
||
|
||
if (token.type === tokens.identifier) {
|
||
tableIndex = identifierFromToken(token);
|
||
eatToken();
|
||
}
|
||
|
||
if (token.type === tokens.number) {
|
||
tableIndex = t.indexLiteral(token.value);
|
||
eatToken();
|
||
}
|
||
|
||
while (token.type !== tokens.closeParen) {
|
||
if (lookaheadAndCheck(tokens.openParen, keywords.offset)) {
|
||
eatToken(); // (
|
||
|
||
eatToken(); // offset
|
||
|
||
while (token.type !== tokens.closeParen) {
|
||
eatTokenOfType(tokens.openParen);
|
||
offset.push(parseFuncInstr());
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
} else if (token.type === tokens.identifier) {
|
||
funcs.push(t.identifier(token.value));
|
||
eatToken();
|
||
} else if (token.type === tokens.number) {
|
||
funcs.push(t.indexLiteral(token.value));
|
||
eatToken();
|
||
} else if (token.type === tokens.openParen) {
|
||
eatToken(); // (
|
||
|
||
offset.push(parseFuncInstr());
|
||
eatTokenOfType(tokens.closeParen);
|
||
} else {
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unsupported token in elem" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
}
|
||
|
||
return t.elem(tableIndex, offset, funcs);
|
||
}
|
||
/**
|
||
* Parses the start instruction in a module
|
||
*
|
||
* WAST:
|
||
*
|
||
* start: ( start <var> )
|
||
* var: <nat> | <name>
|
||
*
|
||
* WAT:
|
||
* start ::= ‘(’ ‘start’ x:funcidx ‘)’
|
||
*/
|
||
|
||
|
||
function parseStart() {
|
||
if (token.type === tokens.identifier) {
|
||
var index = identifierFromToken(token);
|
||
eatToken();
|
||
return t.start(index);
|
||
}
|
||
|
||
if (token.type === tokens.number) {
|
||
var _index2 = t.indexLiteral(token.value);
|
||
|
||
eatToken();
|
||
return t.start(_index2);
|
||
}
|
||
|
||
throw new Error("Unknown start, token: " + tokenToString(token));
|
||
}
|
||
|
||
if (token.type === tokens.openParen) {
|
||
eatToken();
|
||
var startLoc = getStartLoc();
|
||
|
||
if (isKeyword(token, keywords.export)) {
|
||
eatToken();
|
||
var node = parseExport();
|
||
|
||
var _endLoc2 = getEndLoc();
|
||
|
||
return t.withLoc(node, _endLoc2, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.loop)) {
|
||
eatToken();
|
||
|
||
var _node = parseLoop();
|
||
|
||
var _endLoc3 = getEndLoc();
|
||
|
||
return t.withLoc(_node, _endLoc3, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.func)) {
|
||
eatToken();
|
||
|
||
var _node2 = parseFunc();
|
||
|
||
var _endLoc4 = getEndLoc();
|
||
|
||
maybeIgnoreComment();
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node2, _endLoc4, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.module)) {
|
||
eatToken();
|
||
|
||
var _node3 = parseModule();
|
||
|
||
var _endLoc5 = getEndLoc();
|
||
|
||
return t.withLoc(_node3, _endLoc5, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.import)) {
|
||
eatToken();
|
||
|
||
var _node4 = parseImport();
|
||
|
||
var _endLoc6 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node4, _endLoc6, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.block)) {
|
||
eatToken();
|
||
|
||
var _node5 = parseBlock();
|
||
|
||
var _endLoc7 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node5, _endLoc7, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.memory)) {
|
||
eatToken();
|
||
|
||
var _node6 = parseMemory();
|
||
|
||
var _endLoc8 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node6, _endLoc8, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.data)) {
|
||
eatToken();
|
||
|
||
var _node7 = parseData();
|
||
|
||
var _endLoc9 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node7, _endLoc9, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.table)) {
|
||
eatToken();
|
||
|
||
var _node8 = parseTable();
|
||
|
||
var _endLoc10 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node8, _endLoc10, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.global)) {
|
||
eatToken();
|
||
|
||
var _node9 = parseGlobal();
|
||
|
||
var _endLoc11 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node9, _endLoc11, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.type)) {
|
||
eatToken();
|
||
|
||
var _node10 = parseType();
|
||
|
||
var _endLoc12 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node10, _endLoc12, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.start)) {
|
||
eatToken();
|
||
|
||
var _node11 = parseStart();
|
||
|
||
var _endLoc13 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node11, _endLoc13, startLoc);
|
||
}
|
||
|
||
if (isKeyword(token, keywords.elem)) {
|
||
eatToken();
|
||
|
||
var _node12 = parseElem();
|
||
|
||
var _endLoc14 = getEndLoc();
|
||
|
||
eatTokenOfType(tokens.closeParen);
|
||
return t.withLoc(_node12, _endLoc14, startLoc);
|
||
}
|
||
|
||
var instruction = parseFuncInstr();
|
||
var endLoc = getEndLoc();
|
||
maybeIgnoreComment();
|
||
|
||
if (_typeof(instruction) === "object") {
|
||
if (typeof token !== "undefined") {
|
||
eatTokenOfType(tokens.closeParen);
|
||
}
|
||
|
||
return t.withLoc(instruction, endLoc, startLoc);
|
||
}
|
||
}
|
||
|
||
if (token.type === tokens.comment) {
|
||
var _startLoc = getStartLoc();
|
||
|
||
var builder = token.opts.type === "leading" ? t.leadingComment : t.blockComment;
|
||
|
||
var _node13 = builder(token.value);
|
||
|
||
eatToken(); // comment
|
||
|
||
var _endLoc15 = getEndLoc();
|
||
|
||
return t.withLoc(_node13, _endLoc15, _startLoc);
|
||
}
|
||
|
||
throw function () {
|
||
return new Error("\n" + codeFrameFromSource(source, token.loc) + "\n" + "Unknown token" + ", given " + tokenToString(token));
|
||
}();
|
||
}
|
||
|
||
var body = [];
|
||
|
||
while (current < tokensList.length) {
|
||
body.push(walk());
|
||
}
|
||
|
||
return t.program(body);
|
||
} |