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fix: Support ES2015+ function definitions in
function#toStringTokens()
Additionally revert from problematic regex based implementation. Addresses #21
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,17 +1,52 @@ | ||
"use strict"; | ||
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var validFunction = require("../valid-function"); | ||
var isValue = require("../../object/is-value") | ||
, esniff = require("esniff") | ||
, validFunction = require("../valid-function"); | ||
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var re1 = /^\s*function[\0-')-\uffff]*\(([\0-(*-\uffff]*)\)\s*\{([\0-\uffff]*)\}\s*$/ | ||
, re2 = /^\s*\(?([\0-'*-\uffff]*)\)?\s*=>\s*(\{?[\0-\uffff]*\}?)\s*$/; | ||
var classRe = /^\s*class[\s{/}]/; | ||
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module.exports = function () { | ||
var str = String(validFunction(this)), data = str.match(re1); | ||
if (!data) { | ||
data = str.match(re2); | ||
if (!data) throw new Error("Unrecognized string format"); | ||
data[1] = data[1].trim(); | ||
if (data[2][0] === "{") data[2] = data[2].trim().slice(1, -1); | ||
} | ||
return { args: data[1], body: data[2] }; | ||
var str = String(validFunction(this)); | ||
if (classRe.test(str)) throw new Error("Class methods are not supported"); | ||
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var argsStartIndex | ||
, argsEndIndex | ||
, bodyStartIndex | ||
, bodyEndReverseIndex = -1 | ||
, shouldTrimArgs = false; | ||
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esniff(str, function (emitter, accessor) { | ||
emitter.once("trigger:(", function () { argsStartIndex = accessor.index + 1; }); | ||
emitter.once("trigger:=", function () { | ||
if (isValue(argsStartIndex)) return; | ||
argsStartIndex = 0; | ||
argsEndIndex = accessor.index; | ||
shouldTrimArgs = true; | ||
if (!accessor.skipCodePart("=>")) { | ||
throw new Error("Unexpected function string: " + str); | ||
} | ||
accessor.skipWhitespace(); | ||
if (!accessor.skipCodePart("{")) bodyEndReverseIndex = Infinity; | ||
bodyStartIndex = accessor.index; | ||
}); | ||
emitter.on("trigger:)", function () { | ||
if (accessor.scopeDepth) return; | ||
argsEndIndex = accessor.index; | ||
accessor.skipCodePart(")"); | ||
accessor.skipWhitespace(); | ||
if (accessor.skipCodePart("=>")) { | ||
accessor.skipWhitespace(); | ||
if (!accessor.skipCodePart("{")) bodyEndReverseIndex = Infinity; | ||
} else if (!accessor.skipCodePart("{")) { | ||
throw new Error("Unexpected function string: " + str); | ||
} | ||
bodyStartIndex = accessor.index; | ||
accessor.stop(); | ||
}); | ||
}); | ||
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var argsString = str.slice(argsStartIndex, argsEndIndex); | ||
if (shouldTrimArgs) argsString = argsString.trim(); | ||
return { args: argsString, body: str.slice(bodyStartIndex, bodyEndReverseIndex) }; | ||
}; |
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