HarmonyExportDependencyParserPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const HarmonyExportExpressionDependency = require("./HarmonyExportExpressionDependency");
const HarmonyExportHeaderDependency = require("./HarmonyExportHeaderDependency");
const HarmonyExportSpecifierDependency = require("./HarmonyExportSpecifierDependency");
const HarmonyExportImportedSpecifierDependency = require("./HarmonyExportImportedSpecifierDependency");
const HarmonyImportDependency = require("./HarmonyImportDependency");
const HarmonyModulesHelpers = require("./HarmonyModulesHelpers");
module.exports = class HarmonyExportDependencyParserPlugin {
apply(parser) {
parser.plugin("export", statement => {
const dep = new HarmonyExportHeaderDependency(statement.declaration && statement.declaration.range, statement.range);
dep.loc = Object.create(statement.loc);
dep.loc.index = -1;
parser.state.current.addDependency(dep);
return true;
});
parser.plugin("export import", (statement, source) => {
const dep = new HarmonyImportDependency(source, HarmonyModulesHelpers.getNewModuleVar(parser.state, source), statement.range);
dep.loc = Object.create(statement.loc);
dep.loc.index = -1;
parser.state.current.addDependency(dep);
parser.state.lastHarmonyImport = dep;
return true;
});
parser.plugin("export expression", (statement, expr) => {
const dep = new HarmonyExportExpressionDependency(parser.state.module, expr.range, statement.range);
dep.loc = Object.create(statement.loc);
dep.loc.index = -1;
parser.state.current.addDependency(dep);
return true;
});
parser.plugin("export declaration", statement => {});
parser.plugin("export specifier", (statement, id, name, idx) => {
const rename = parser.scope.renames[`$${id}`];
let dep;
const harmonyNamedExports = parser.state.harmonyNamedExports = parser.state.harmonyNamedExports || new Set();
harmonyNamedExports.add(name);
if(rename === "imported var") {
const settings = parser.state.harmonySpecifier[`$${id}`];
dep = new HarmonyExportImportedSpecifierDependency(parser.state.module, settings[0], settings[1], settings[2], name, harmonyNamedExports, null);
} else {
const immutable = statement.declaration && isImmutableStatement(statement.declaration);
const hoisted = statement.declaration && isHoistedStatement(statement.declaration);
dep = new HarmonyExportSpecifierDependency(parser.state.module, id, name, !immutable || hoisted ? -2 : (statement.range[1] + 0.5), immutable);
}
dep.loc = Object.create(statement.loc);
dep.loc.index = idx;
parser.state.current.addDependency(dep);
return true;
});
parser.plugin("export import specifier", (statement, source, id, name, idx) => {
const harmonyNamedExports = parser.state.harmonyNamedExports = parser.state.harmonyNamedExports || new Set();
let harmonyStarExports = null;
if(name) {
harmonyNamedExports.add(name);
} else {
harmonyStarExports = parser.state.harmonyStarExports = parser.state.harmonyStarExports || [];
}
const dep = new HarmonyExportImportedSpecifierDependency(parser.state.module, parser.state.lastHarmonyImport, HarmonyModulesHelpers.getModuleVar(parser.state, source), id, name, harmonyNamedExports, harmonyStarExports && harmonyStarExports.slice());
if(harmonyStarExports) {
harmonyStarExports.push(dep);
}
dep.loc = Object.create(statement.loc);
dep.loc.index = idx;
parser.state.current.addDependency(dep);
return true;
});
}
};
function isImmutableStatement(statement) {
if(statement.type === "FunctionDeclaration") return true;
if(statement.type === "ClassDeclaration") return true;
if(statement.type === "VariableDeclaration" && statement.kind === "const") return true;
return false;
}
function isHoistedStatement(statement) {
if(statement.type === "FunctionDeclaration") return true;
return false;
}