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47 lines
1.4 KiB
47 lines
1.4 KiB
"use strict"; |
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Object.defineProperty(exports, "__esModule", { |
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value: true |
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}); |
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exports.codeFrameFromAst = codeFrameFromAst; |
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exports.codeFrameFromSource = codeFrameFromSource; |
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var _wastPrinter = require("@webassemblyjs/wast-printer"); |
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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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var SHOW_LINES_AROUND_POINTER = 5; |
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function repeat(char, nb) { |
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return Array(nb).fill(char).join(""); |
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} // TODO(sven): allow arbitrary ast nodes |
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function codeFrameFromAst(ast, loc) { |
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return codeFrameFromSource((0, _wastPrinter.print)(ast), loc); |
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} |
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function codeFrameFromSource(source, loc) { |
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var start = loc.start, |
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end = loc.end; |
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var length = 1; |
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if (_typeof(end) === "object") { |
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length = end.column - start.column + 1; |
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} |
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return source.split("\n").reduce(function (acc, line, lineNbr) { |
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if (Math.abs(start.line - lineNbr) < SHOW_LINES_AROUND_POINTER) { |
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acc += line + "\n"; |
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} // Add a new line with the pointer padded left |
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if (lineNbr === start.line - 1) { |
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acc += repeat(" ", start.column - 1); |
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acc += repeat("^", length); |
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acc += "\n"; |
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} |
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return acc; |
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}, ""); |
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} |