ImportParserPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ImportContextDependency = require("./ImportContextDependency");
const ImportDependenciesBlock = require("./ImportDependenciesBlock");
const ContextDependencyHelpers = require("./ContextDependencyHelpers");
class ImportParserPlugin {
constructor(options) {
this.options = options;
}
apply(parser) {
const options = this.options;
parser.plugin(["call System.import", "import-call"], (expr) => {
if(expr.arguments.length !== 1)
throw new Error("Incorrect number of arguments provided to 'import(module: string) -> Promise'.");
let dep;
const param = parser.evaluateExpression(expr.arguments[0]);
if(param.isString()) {
const depBlock = new ImportDependenciesBlock(param.string, expr.range, parser.state.module, expr.loc);
parser.state.current.addBlock(depBlock);
return true;
} else {
dep = ContextDependencyHelpers.create(ImportContextDependency, expr.range, param, expr, options);
if(!dep) return;
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
}
});
}
}
module.exports = ImportParserPlugin;