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MIT License
Copyright (c) 2018 Sven Sauleau <sven@sauleau.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# @webassemblyjs/wast-parser
> WebAssembly text format printer
## Installation
```sh
yarn add @webassemblyjs/wast-printer
```
## Usage
```js
import { print } from "@webassemblyjs/wast-printer"
console.log(print(ast));
```

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function _typeof(obj) { "@babel/helpers - typeof"; 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); }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
import { isAnonymous, isInstruction } from "@webassemblyjs/ast";
import Long from "@xtuc/long";
var compact = false;
var space = " ";
var quote = function quote(str) {
return "\"".concat(str, "\"");
};
function indent(nb) {
return Array(nb).fill(space + space).join("");
} // TODO(sven): allow arbitrary ast nodes
export function print(n) {
if (n.type === "Program") {
return printProgram(n, 0);
} else {
throw new Error("Unsupported node in print of type: " + String(n.type));
}
}
function printProgram(n, depth) {
return n.body.reduce(function (acc, child) {
if (child.type === "Module") {
acc += printModule(child, depth + 1);
}
if (child.type === "Func") {
acc += printFunc(child, depth + 1);
}
if (child.type === "BlockComment") {
acc += printBlockComment(child);
}
if (child.type === "LeadingComment") {
acc += printLeadingComment(child);
}
if (compact === false) {
acc += "\n";
}
return acc;
}, "");
}
function printTypeInstruction(n) {
var out = "";
out += "(";
out += "type";
out += space;
if (n.id != null) {
out += printIndex(n.id);
out += space;
}
out += "(";
out += "func";
n.functype.params.forEach(function (param) {
out += space;
out += "(";
out += "param";
out += space;
out += printFuncParam(param);
out += ")";
});
n.functype.results.forEach(function (result) {
out += space;
out += "(";
out += "result";
out += space;
out += result;
out += ")";
});
out += ")"; // func
out += ")";
return out;
}
function printModule(n, depth) {
var out = "(";
out += "module";
if (typeof n.id === "string") {
out += space;
out += n.id;
}
if (compact === false) {
out += "\n";
} else {
out += space;
}
n.fields.forEach(function (field) {
if (compact === false) {
out += indent(depth);
}
switch (field.type) {
case "Func":
{
out += printFunc(field, depth + 1);
break;
}
case "TypeInstruction":
{
out += printTypeInstruction(field);
break;
}
case "Table":
{
out += printTable(field);
break;
}
case "Global":
{
out += printGlobal(field, depth + 1);
break;
}
case "ModuleExport":
{
out += printModuleExport(field);
break;
}
case "ModuleImport":
{
out += printModuleImport(field);
break;
}
case "Memory":
{
out += printMemory(field);
break;
}
case "BlockComment":
{
out += printBlockComment(field);
break;
}
case "LeadingComment":
{
out += printLeadingComment(field);
break;
}
case "Start":
{
out += printStart(field);
break;
}
case "Elem":
{
out += printElem(field, depth);
break;
}
case "Data":
{
out += printData(field, depth);
break;
}
default:
throw new Error("Unsupported node in printModule: " + String(field.type));
}
if (compact === false) {
out += "\n";
}
});
out += ")";
return out;
}
function printData(n, depth) {
var out = "";
out += "(";
out += "data";
out += space;
out += printIndex(n.memoryIndex);
out += space;
out += printInstruction(n.offset, depth);
out += space;
out += '"';
n.init.values.forEach(function (_byte) {
// Avoid non-displayable characters
if (_byte <= 31 || _byte == 34 || _byte == 92 || _byte >= 127) {
out += "\\";
out += ("00" + _byte.toString(16)).substr(-2);
} else if (_byte > 255) {
throw new Error("Unsupported byte in data segment: " + _byte);
} else {
out += String.fromCharCode(_byte);
}
});
out += '"';
out += ")";
return out;
}
function printElem(n, depth) {
var out = "";
out += "(";
out += "elem";
out += space;
out += printIndex(n.table);
var _n$offset = _slicedToArray(n.offset, 1),
firstOffset = _n$offset[0];
out += space;
out += "(";
out += "offset";
out += space;
out += printInstruction(firstOffset, depth);
out += ")";
n.funcs.forEach(function (func) {
out += space;
out += printIndex(func);
});
out += ")";
return out;
}
function printStart(n) {
var out = "";
out += "(";
out += "start";
out += space;
out += printIndex(n.index);
out += ")";
return out;
}
function printLeadingComment(n) {
// Don't print leading comments in compact mode
if (compact === true) {
return "";
}
var out = "";
out += ";;";
out += n.value;
out += "\n";
return out;
}
function printBlockComment(n) {
// Don't print block comments in compact mode
if (compact === true) {
return "";
}
var out = "";
out += "(;";
out += n.value;
out += ";)";
out += "\n";
return out;
}
function printSignature(n) {
var out = "";
n.params.forEach(function (param) {
out += space;
out += "(";
out += "param";
out += space;
out += printFuncParam(param);
out += ")";
});
n.results.forEach(function (result) {
out += space;
out += "(";
out += "result";
out += space;
out += result;
out += ")";
});
return out;
}
function printModuleImportDescr(n) {
var out = "";
if (n.type === "FuncImportDescr") {
out += "(";
out += "func";
if (isAnonymous(n.id) === false) {
out += space;
out += printIdentifier(n.id);
}
out += printSignature(n.signature);
out += ")";
}
if (n.type === "GlobalType") {
out += "(";
out += "global";
out += space;
out += printGlobalType(n);
out += ")";
}
if (n.type === "Table") {
out += printTable(n);
}
return out;
}
function printModuleImport(n) {
var out = "";
out += "(";
out += "import";
out += space;
out += quote(n.module);
out += space;
out += quote(n.name);
out += space;
out += printModuleImportDescr(n.descr);
out += ")";
return out;
}
function printGlobalType(n) {
var out = "";
if (n.mutability === "var") {
out += "(";
out += "mut";
out += space;
out += n.valtype;
out += ")";
} else {
out += n.valtype;
}
return out;
}
function printGlobal(n, depth) {
var out = "";
out += "(";
out += "global";
out += space;
if (n.name != null && isAnonymous(n.name) === false) {
out += printIdentifier(n.name);
out += space;
}
out += printGlobalType(n.globalType);
out += space;
n.init.forEach(function (i) {
out += printInstruction(i, depth + 1);
});
out += ")";
return out;
}
function printTable(n) {
var out = "";
out += "(";
out += "table";
out += space;
if (n.name != null && isAnonymous(n.name) === false) {
out += printIdentifier(n.name);
out += space;
}
out += printLimit(n.limits);
out += space;
out += n.elementType;
out += ")";
return out;
}
function printFuncParam(n) {
var out = "";
if (typeof n.id === "string") {
out += "$" + n.id;
out += space;
}
out += n.valtype;
return out;
}
function printFunc(n, depth) {
var out = "";
out += "(";
out += "func";
if (n.name != null) {
if (n.name.type === "Identifier" && isAnonymous(n.name) === false) {
out += space;
out += printIdentifier(n.name);
}
}
if (n.signature.type === "Signature") {
out += printSignature(n.signature);
} else {
var index = n.signature;
out += space;
out += "(";
out += "type";
out += space;
out += printIndex(index);
out += ")";
}
if (n.body.length > 0) {
// func is empty since we ignore the default end instruction
if (n.body.length === 1 && n.body[0].id === "end") {
out += ")";
return out;
}
if (compact === false) {
out += "\n";
}
n.body.forEach(function (i) {
if (i.id !== "end") {
out += indent(depth);
out += printInstruction(i, depth);
if (compact === false) {
out += "\n";
}
}
});
out += indent(depth - 1) + ")";
} else {
out += ")";
}
return out;
}
function printInstruction(n, depth) {
switch (n.type) {
case "Instr":
// $FlowIgnore
return printGenericInstruction(n, depth + 1);
case "BlockInstruction":
// $FlowIgnore
return printBlockInstruction(n, depth + 1);
case "IfInstruction":
// $FlowIgnore
return printIfInstruction(n, depth + 1);
case "CallInstruction":
// $FlowIgnore
return printCallInstruction(n, depth + 1);
case "CallIndirectInstruction":
// $FlowIgnore
return printCallIndirectIntruction(n, depth + 1);
case "LoopInstruction":
// $FlowIgnore
return printLoopInstruction(n, depth + 1);
default:
throw new Error("Unsupported instruction: " + JSON.stringify(n.type));
}
}
function printCallIndirectIntruction(n, depth) {
var out = "";
out += "(";
out += "call_indirect";
if (n.signature.type === "Signature") {
out += printSignature(n.signature);
} else if (n.signature.type === "Identifier") {
out += space;
out += "(";
out += "type";
out += space;
out += printIdentifier(n.signature);
out += ")";
} else {
throw new Error("CallIndirectInstruction: unsupported signature " + JSON.stringify(n.signature.type));
}
out += space;
if (n.intrs != null) {
// $FlowIgnore
n.intrs.forEach(function (i, index) {
// $FlowIgnore
out += printInstruction(i, depth + 1); // $FlowIgnore
if (index !== n.intrs.length - 1) {
out += space;
}
});
}
out += ")";
return out;
}
function printLoopInstruction(n, depth) {
var out = "";
out += "(";
out += "loop";
if (n.label != null && isAnonymous(n.label) === false) {
out += space;
out += printIdentifier(n.label);
}
if (typeof n.resulttype === "string") {
out += space;
out += "(";
out += "result";
out += space;
out += n.resulttype;
out += ")";
}
if (n.instr.length > 0) {
n.instr.forEach(function (e) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(e, depth + 1);
});
if (compact === false) {
out += "\n";
out += indent(depth - 1);
}
}
out += ")";
return out;
}
function printCallInstruction(n, depth) {
var out = "";
out += "(";
out += "call";
out += space;
out += printIndex(n.index);
if (_typeof(n.instrArgs) === "object") {
// $FlowIgnore
n.instrArgs.forEach(function (arg) {
out += space;
out += printFuncInstructionArg(arg, depth + 1);
});
}
out += ")";
return out;
}
function printIfInstruction(n, depth) {
var out = "";
out += "(";
out += "if";
if (n.testLabel != null && isAnonymous(n.testLabel) === false) {
out += space;
out += printIdentifier(n.testLabel);
}
if (typeof n.result === "string") {
out += space;
out += "(";
out += "result";
out += space;
out += n.result;
out += ")";
}
if (n.test.length > 0) {
out += space;
n.test.forEach(function (i) {
out += printInstruction(i, depth + 1);
});
}
if (n.consequent.length > 0) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += "(";
out += "then";
depth++;
n.consequent.forEach(function (i) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(i, depth + 1);
});
depth--;
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += ")";
} else {
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += "(";
out += "then";
out += ")";
}
if (n.alternate.length > 0) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += "(";
out += "else";
depth++;
n.alternate.forEach(function (i) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(i, depth + 1);
});
depth--;
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += ")";
} else {
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += "(";
out += "else";
out += ")";
}
if (compact === false) {
out += "\n";
out += indent(depth - 1);
}
out += ")";
return out;
}
function printBlockInstruction(n, depth) {
var out = "";
out += "(";
out += "block";
if (n.label != null && isAnonymous(n.label) === false) {
out += space;
out += printIdentifier(n.label);
}
if (typeof n.result === "string") {
out += space;
out += "(";
out += "result";
out += space;
out += n.result;
out += ")";
}
if (n.instr.length > 0) {
n.instr.forEach(function (i) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(i, depth + 1);
});
if (compact === false) {
out += "\n";
}
out += indent(depth - 1);
out += ")";
} else {
out += ")";
}
return out;
}
function printGenericInstruction(n, depth) {
var out = "";
out += "(";
if (typeof n.object === "string") {
out += n.object;
out += ".";
}
out += n.id;
n.args.forEach(function (arg) {
out += space;
out += printFuncInstructionArg(arg, depth + 1);
});
if (n.namedArgs !== undefined) {
for (var key in n.namedArgs) {
out += space + key + "=";
out += printFuncInstructionArg(n.namedArgs[key], depth + 1);
}
}
out += ")";
return out;
}
function printLongNumberLiteral(n) {
if (typeof n.raw === "string") {
return n.raw;
}
var _n$value = n.value,
low = _n$value.low,
high = _n$value.high;
var v = new Long(low, high);
return v.toString();
}
function printFloatLiteral(n) {
if (typeof n.raw === "string") {
return n.raw;
}
return String(n.value);
}
function printFuncInstructionArg(n, depth) {
var out = "";
if (n.type === "NumberLiteral") {
out += printNumberLiteral(n);
}
if (n.type === "LongNumberLiteral") {
out += printLongNumberLiteral(n);
}
if (n.type === "Identifier" && isAnonymous(n) === false) {
out += printIdentifier(n);
}
if (n.type === "ValtypeLiteral") {
out += n.name;
}
if (n.type === "FloatLiteral") {
out += printFloatLiteral(n);
}
if (isInstruction(n)) {
out += printInstruction(n, depth + 1);
}
return out;
}
function printNumberLiteral(n) {
if (typeof n.raw === "string") {
return n.raw;
}
return String(n.value);
}
function printModuleExport(n) {
var out = "";
out += "(";
out += "export";
out += space;
out += quote(n.name);
if (n.descr.exportType === "Func") {
out += space;
out += "(";
out += "func";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else if (n.descr.exportType === "Global") {
out += space;
out += "(";
out += "global";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else if (n.descr.exportType === "Memory") {
out += space;
out += "(";
out += "memory";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else if (n.descr.exportType === "Table") {
out += space;
out += "(";
out += "table";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else {
throw new Error("printModuleExport: unknown type: " + n.descr.exportType);
}
out += ")";
return out;
}
function printIdentifier(n) {
return "$" + n.value;
}
function printIndex(n) {
if (n.type === "Identifier") {
return printIdentifier(n);
} else if (n.type === "NumberLiteral") {
return printNumberLiteral(n);
} else {
throw new Error("Unsupported index: " + n.type);
}
}
function printMemory(n) {
var out = "";
out += "(";
out += "memory";
if (n.id != null) {
out += space;
out += printIndex(n.id);
out += space;
}
out += printLimit(n.limits);
out += ")";
return out;
}
function printLimit(n) {
var out = "";
out += n.min + "";
if (n.max != null) {
out += space;
out += String(n.max);
if (n.shared === true) {
out += " shared";
}
}
return out;
}

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.print = print;
var _ast = require("@webassemblyjs/ast");
var _long = _interopRequireDefault(require("@xtuc/long"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function _typeof(obj) { "@babel/helpers - typeof"; 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); }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
var compact = false;
var space = " ";
var quote = function quote(str) {
return "\"".concat(str, "\"");
};
function indent(nb) {
return Array(nb).fill(space + space).join("");
} // TODO(sven): allow arbitrary ast nodes
function print(n) {
if (n.type === "Program") {
return printProgram(n, 0);
} else {
throw new Error("Unsupported node in print of type: " + String(n.type));
}
}
function printProgram(n, depth) {
return n.body.reduce(function (acc, child) {
if (child.type === "Module") {
acc += printModule(child, depth + 1);
}
if (child.type === "Func") {
acc += printFunc(child, depth + 1);
}
if (child.type === "BlockComment") {
acc += printBlockComment(child);
}
if (child.type === "LeadingComment") {
acc += printLeadingComment(child);
}
if (compact === false) {
acc += "\n";
}
return acc;
}, "");
}
function printTypeInstruction(n) {
var out = "";
out += "(";
out += "type";
out += space;
if (n.id != null) {
out += printIndex(n.id);
out += space;
}
out += "(";
out += "func";
n.functype.params.forEach(function (param) {
out += space;
out += "(";
out += "param";
out += space;
out += printFuncParam(param);
out += ")";
});
n.functype.results.forEach(function (result) {
out += space;
out += "(";
out += "result";
out += space;
out += result;
out += ")";
});
out += ")"; // func
out += ")";
return out;
}
function printModule(n, depth) {
var out = "(";
out += "module";
if (typeof n.id === "string") {
out += space;
out += n.id;
}
if (compact === false) {
out += "\n";
} else {
out += space;
}
n.fields.forEach(function (field) {
if (compact === false) {
out += indent(depth);
}
switch (field.type) {
case "Func":
{
out += printFunc(field, depth + 1);
break;
}
case "TypeInstruction":
{
out += printTypeInstruction(field);
break;
}
case "Table":
{
out += printTable(field);
break;
}
case "Global":
{
out += printGlobal(field, depth + 1);
break;
}
case "ModuleExport":
{
out += printModuleExport(field);
break;
}
case "ModuleImport":
{
out += printModuleImport(field);
break;
}
case "Memory":
{
out += printMemory(field);
break;
}
case "BlockComment":
{
out += printBlockComment(field);
break;
}
case "LeadingComment":
{
out += printLeadingComment(field);
break;
}
case "Start":
{
out += printStart(field);
break;
}
case "Elem":
{
out += printElem(field, depth);
break;
}
case "Data":
{
out += printData(field, depth);
break;
}
default:
throw new Error("Unsupported node in printModule: " + String(field.type));
}
if (compact === false) {
out += "\n";
}
});
out += ")";
return out;
}
function printData(n, depth) {
var out = "";
out += "(";
out += "data";
out += space;
out += printIndex(n.memoryIndex);
out += space;
out += printInstruction(n.offset, depth);
out += space;
out += '"';
n.init.values.forEach(function (_byte) {
// Avoid non-displayable characters
if (_byte <= 31 || _byte == 34 || _byte == 92 || _byte >= 127) {
out += "\\";
out += ("00" + _byte.toString(16)).substr(-2);
} else if (_byte > 255) {
throw new Error("Unsupported byte in data segment: " + _byte);
} else {
out += String.fromCharCode(_byte);
}
});
out += '"';
out += ")";
return out;
}
function printElem(n, depth) {
var out = "";
out += "(";
out += "elem";
out += space;
out += printIndex(n.table);
var _n$offset = _slicedToArray(n.offset, 1),
firstOffset = _n$offset[0];
out += space;
out += "(";
out += "offset";
out += space;
out += printInstruction(firstOffset, depth);
out += ")";
n.funcs.forEach(function (func) {
out += space;
out += printIndex(func);
});
out += ")";
return out;
}
function printStart(n) {
var out = "";
out += "(";
out += "start";
out += space;
out += printIndex(n.index);
out += ")";
return out;
}
function printLeadingComment(n) {
// Don't print leading comments in compact mode
if (compact === true) {
return "";
}
var out = "";
out += ";;";
out += n.value;
out += "\n";
return out;
}
function printBlockComment(n) {
// Don't print block comments in compact mode
if (compact === true) {
return "";
}
var out = "";
out += "(;";
out += n.value;
out += ";)";
out += "\n";
return out;
}
function printSignature(n) {
var out = "";
n.params.forEach(function (param) {
out += space;
out += "(";
out += "param";
out += space;
out += printFuncParam(param);
out += ")";
});
n.results.forEach(function (result) {
out += space;
out += "(";
out += "result";
out += space;
out += result;
out += ")";
});
return out;
}
function printModuleImportDescr(n) {
var out = "";
if (n.type === "FuncImportDescr") {
out += "(";
out += "func";
if ((0, _ast.isAnonymous)(n.id) === false) {
out += space;
out += printIdentifier(n.id);
}
out += printSignature(n.signature);
out += ")";
}
if (n.type === "GlobalType") {
out += "(";
out += "global";
out += space;
out += printGlobalType(n);
out += ")";
}
if (n.type === "Table") {
out += printTable(n);
}
return out;
}
function printModuleImport(n) {
var out = "";
out += "(";
out += "import";
out += space;
out += quote(n.module);
out += space;
out += quote(n.name);
out += space;
out += printModuleImportDescr(n.descr);
out += ")";
return out;
}
function printGlobalType(n) {
var out = "";
if (n.mutability === "var") {
out += "(";
out += "mut";
out += space;
out += n.valtype;
out += ")";
} else {
out += n.valtype;
}
return out;
}
function printGlobal(n, depth) {
var out = "";
out += "(";
out += "global";
out += space;
if (n.name != null && (0, _ast.isAnonymous)(n.name) === false) {
out += printIdentifier(n.name);
out += space;
}
out += printGlobalType(n.globalType);
out += space;
n.init.forEach(function (i) {
out += printInstruction(i, depth + 1);
});
out += ")";
return out;
}
function printTable(n) {
var out = "";
out += "(";
out += "table";
out += space;
if (n.name != null && (0, _ast.isAnonymous)(n.name) === false) {
out += printIdentifier(n.name);
out += space;
}
out += printLimit(n.limits);
out += space;
out += n.elementType;
out += ")";
return out;
}
function printFuncParam(n) {
var out = "";
if (typeof n.id === "string") {
out += "$" + n.id;
out += space;
}
out += n.valtype;
return out;
}
function printFunc(n, depth) {
var out = "";
out += "(";
out += "func";
if (n.name != null) {
if (n.name.type === "Identifier" && (0, _ast.isAnonymous)(n.name) === false) {
out += space;
out += printIdentifier(n.name);
}
}
if (n.signature.type === "Signature") {
out += printSignature(n.signature);
} else {
var index = n.signature;
out += space;
out += "(";
out += "type";
out += space;
out += printIndex(index);
out += ")";
}
if (n.body.length > 0) {
// func is empty since we ignore the default end instruction
if (n.body.length === 1 && n.body[0].id === "end") {
out += ")";
return out;
}
if (compact === false) {
out += "\n";
}
n.body.forEach(function (i) {
if (i.id !== "end") {
out += indent(depth);
out += printInstruction(i, depth);
if (compact === false) {
out += "\n";
}
}
});
out += indent(depth - 1) + ")";
} else {
out += ")";
}
return out;
}
function printInstruction(n, depth) {
switch (n.type) {
case "Instr":
// $FlowIgnore
return printGenericInstruction(n, depth + 1);
case "BlockInstruction":
// $FlowIgnore
return printBlockInstruction(n, depth + 1);
case "IfInstruction":
// $FlowIgnore
return printIfInstruction(n, depth + 1);
case "CallInstruction":
// $FlowIgnore
return printCallInstruction(n, depth + 1);
case "CallIndirectInstruction":
// $FlowIgnore
return printCallIndirectIntruction(n, depth + 1);
case "LoopInstruction":
// $FlowIgnore
return printLoopInstruction(n, depth + 1);
default:
throw new Error("Unsupported instruction: " + JSON.stringify(n.type));
}
}
function printCallIndirectIntruction(n, depth) {
var out = "";
out += "(";
out += "call_indirect";
if (n.signature.type === "Signature") {
out += printSignature(n.signature);
} else if (n.signature.type === "Identifier") {
out += space;
out += "(";
out += "type";
out += space;
out += printIdentifier(n.signature);
out += ")";
} else {
throw new Error("CallIndirectInstruction: unsupported signature " + JSON.stringify(n.signature.type));
}
out += space;
if (n.intrs != null) {
// $FlowIgnore
n.intrs.forEach(function (i, index) {
// $FlowIgnore
out += printInstruction(i, depth + 1); // $FlowIgnore
if (index !== n.intrs.length - 1) {
out += space;
}
});
}
out += ")";
return out;
}
function printLoopInstruction(n, depth) {
var out = "";
out += "(";
out += "loop";
if (n.label != null && (0, _ast.isAnonymous)(n.label) === false) {
out += space;
out += printIdentifier(n.label);
}
if (typeof n.resulttype === "string") {
out += space;
out += "(";
out += "result";
out += space;
out += n.resulttype;
out += ")";
}
if (n.instr.length > 0) {
n.instr.forEach(function (e) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(e, depth + 1);
});
if (compact === false) {
out += "\n";
out += indent(depth - 1);
}
}
out += ")";
return out;
}
function printCallInstruction(n, depth) {
var out = "";
out += "(";
out += "call";
out += space;
out += printIndex(n.index);
if (_typeof(n.instrArgs) === "object") {
// $FlowIgnore
n.instrArgs.forEach(function (arg) {
out += space;
out += printFuncInstructionArg(arg, depth + 1);
});
}
out += ")";
return out;
}
function printIfInstruction(n, depth) {
var out = "";
out += "(";
out += "if";
if (n.testLabel != null && (0, _ast.isAnonymous)(n.testLabel) === false) {
out += space;
out += printIdentifier(n.testLabel);
}
if (typeof n.result === "string") {
out += space;
out += "(";
out += "result";
out += space;
out += n.result;
out += ")";
}
if (n.test.length > 0) {
out += space;
n.test.forEach(function (i) {
out += printInstruction(i, depth + 1);
});
}
if (n.consequent.length > 0) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += "(";
out += "then";
depth++;
n.consequent.forEach(function (i) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(i, depth + 1);
});
depth--;
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += ")";
} else {
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += "(";
out += "then";
out += ")";
}
if (n.alternate.length > 0) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += "(";
out += "else";
depth++;
n.alternate.forEach(function (i) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(i, depth + 1);
});
depth--;
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += ")";
} else {
if (compact === false) {
out += "\n";
out += indent(depth);
}
out += "(";
out += "else";
out += ")";
}
if (compact === false) {
out += "\n";
out += indent(depth - 1);
}
out += ")";
return out;
}
function printBlockInstruction(n, depth) {
var out = "";
out += "(";
out += "block";
if (n.label != null && (0, _ast.isAnonymous)(n.label) === false) {
out += space;
out += printIdentifier(n.label);
}
if (typeof n.result === "string") {
out += space;
out += "(";
out += "result";
out += space;
out += n.result;
out += ")";
}
if (n.instr.length > 0) {
n.instr.forEach(function (i) {
if (compact === false) {
out += "\n";
}
out += indent(depth);
out += printInstruction(i, depth + 1);
});
if (compact === false) {
out += "\n";
}
out += indent(depth - 1);
out += ")";
} else {
out += ")";
}
return out;
}
function printGenericInstruction(n, depth) {
var out = "";
out += "(";
if (typeof n.object === "string") {
out += n.object;
out += ".";
}
out += n.id;
n.args.forEach(function (arg) {
out += space;
out += printFuncInstructionArg(arg, depth + 1);
});
if (n.namedArgs !== undefined) {
for (var key in n.namedArgs) {
out += space + key + "=";
out += printFuncInstructionArg(n.namedArgs[key], depth + 1);
}
}
out += ")";
return out;
}
function printLongNumberLiteral(n) {
if (typeof n.raw === "string") {
return n.raw;
}
var _n$value = n.value,
low = _n$value.low,
high = _n$value.high;
var v = new _long["default"](low, high);
return v.toString();
}
function printFloatLiteral(n) {
if (typeof n.raw === "string") {
return n.raw;
}
return String(n.value);
}
function printFuncInstructionArg(n, depth) {
var out = "";
if (n.type === "NumberLiteral") {
out += printNumberLiteral(n);
}
if (n.type === "LongNumberLiteral") {
out += printLongNumberLiteral(n);
}
if (n.type === "Identifier" && (0, _ast.isAnonymous)(n) === false) {
out += printIdentifier(n);
}
if (n.type === "ValtypeLiteral") {
out += n.name;
}
if (n.type === "FloatLiteral") {
out += printFloatLiteral(n);
}
if ((0, _ast.isInstruction)(n)) {
out += printInstruction(n, depth + 1);
}
return out;
}
function printNumberLiteral(n) {
if (typeof n.raw === "string") {
return n.raw;
}
return String(n.value);
}
function printModuleExport(n) {
var out = "";
out += "(";
out += "export";
out += space;
out += quote(n.name);
if (n.descr.exportType === "Func") {
out += space;
out += "(";
out += "func";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else if (n.descr.exportType === "Global") {
out += space;
out += "(";
out += "global";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else if (n.descr.exportType === "Memory") {
out += space;
out += "(";
out += "memory";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else if (n.descr.exportType === "Table") {
out += space;
out += "(";
out += "table";
out += space;
out += printIndex(n.descr.id);
out += ")";
} else {
throw new Error("printModuleExport: unknown type: " + n.descr.exportType);
}
out += ")";
return out;
}
function printIdentifier(n) {
return "$" + n.value;
}
function printIndex(n) {
if (n.type === "Identifier") {
return printIdentifier(n);
} else if (n.type === "NumberLiteral") {
return printNumberLiteral(n);
} else {
throw new Error("Unsupported index: " + n.type);
}
}
function printMemory(n) {
var out = "";
out += "(";
out += "memory";
if (n.id != null) {
out += space;
out += printIndex(n.id);
out += space;
}
out += printLimit(n.limits);
out += ")";
return out;
}
function printLimit(n) {
var out = "";
out += n.min + "";
if (n.max != null) {
out += space;
out += String(n.max);
if (n.shared === true) {
out += " shared";
}
}
return out;
}

View File

@ -0,0 +1,36 @@
{
"name": "@webassemblyjs/wast-printer",
"version": "1.14.1",
"description": "WebAssembly text format printer",
"main": "lib/index.js",
"module": "esm/index.js",
"keywords": [
"webassembly",
"javascript",
"ast",
"compiler",
"printer",
"wast"
],
"scripts": {
"test": "mocha"
},
"author": "Sven Sauleau",
"license": "MIT",
"dependencies": {
"@webassemblyjs/ast": "1.14.1",
"@xtuc/long": "4.2.2"
},
"devDependencies": {
"@webassemblyjs/helper-test-framework": "1.14.1",
"@webassemblyjs/wast-parser": "1.14.1"
},
"repository": {
"type": "git",
"url": "https://github.com/xtuc/webassemblyjs.git"
},
"publishConfig": {
"access": "public"
},
"gitHead": "25d52b1296e151ac56244a7c3886661e6b4a69ea"
}