28 lines
590 B
JavaScript
28 lines
590 B
JavaScript
var t = require("../../types");
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exports._has = function (node) {
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var first = node.body[0];
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return t.isExpressionStatement(first) && t.isLiteral(first.expression, { value: "use strict" });
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};
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exports._wrap = function (node, callback) {
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var useStrictNode;
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if (exports._has(node)) {
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useStrictNode = node.body.shift();
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}
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callback();
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if (useStrictNode) {
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node.body.unshift(useStrictNode);
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}
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};
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exports.ast = {
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exit: function (ast) {
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if (!exports._has(ast.program)) {
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ast.program.body.unshift(t.expressionStatement(t.literal("use strict")));
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}
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}
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};
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