buble-jsx-only/dist/buble.es.js

Bublé, but just JSX.

import { Parser } from 'acorn';
import acornJsx from 'acorn-jsx';
import MagicString from 'magic-string';

class Node {
	ancestor(level) {
		var node = this;
		while (level--) {
			node = node.parent;
			if (!node) { return null; }
		}

		return node;
	}

	contains(node) {
		while (node) {
			if (node === this) { return true; }
			node = node.parent;
		}

		return false;
	}

	findLexicalBoundary() {
		return this.parent.findLexicalBoundary();
	}

	findNearest(type) {
		if (typeof type === 'string') { type = new RegExp(`^${type}$`); }
		if (type.test(this.type)) { return this; }
		return this.parent.findNearest(type);
	}

	unparenthesizedParent() {
		var node = this.parent;
		while (node && node.type === 'ParenthesizedExpression') {
			node = node.parent;
		}
		return node;
	}

	unparenthesize() {
		var node = this;
		while (node.type === 'ParenthesizedExpression') {
			node = node.expression;
		}
		return node;
	}

	findScope(functionScope) {
		return this.parent.findScope(functionScope);
	}

	getIndentation() {
		return this.parent.getIndentation();
	}

	initialise(transforms) {
		for (var i = 0, list = this.keys; i < list.length; i += 1) {
			var key = list[i];

			var value = this[key];

			if (Array.isArray(value)) {
				value.forEach(node => node && node.initialise(transforms));
			} else if (value && typeof value === 'object') {
				value.initialise(transforms);
			}
		}
	}

	toJSON() {
		return toJSON(this);
	}

	toString() {
		return this.program.magicString.original.slice(this.start, this.end);
	}

	transpile(code, transforms) {
		for (var i = 0, list = this.keys; i < list.length; i += 1) {
			var key = list[i];

			var value = this[key];

			if (Array.isArray(value)) {
				value.forEach(node => node && node.transpile(code, transforms));
			} else if (value && typeof value === 'object') {
				value.transpile(code, transforms);
			}
		}
	}
}

function extractNames(node) {
	var names = [];
	extractors[node.type](names, node);
	return names;
}

var extractors = {
	Identifier(names, node) {
		names.push(node);
	},
};

var reserved = Object.create(null);
'do if in for let new try var case else enum eval null this true void with await break catch class const false super throw while yield delete export import public return static switch typeof default extends finally package private continue debugger function arguments interface protected implements instanceof'
	.split(' ')
	.forEach(word => (reserved[word] = true));

function Scope(options) {
	options = options || {};

	this.parent = options.parent;
	this.isBlockScope = !!options.block;
	this.createDeclarationCallback = options.declare;

	var scope = this;
	while (scope.isBlockScope) { scope = scope.parent; }
	this.functionScope = scope;

	this.identifiers = [];
	this.declarations = Object.create(null);
	this.references = Object.create(null);
	this.blockScopedDeclarations = this.isBlockScope ? null : Object.create(null);
	this.aliases = Object.create(null);
}

Scope.prototype = {
	addDeclaration(node, kind) {
		for (var i = 0, list = extractNames(node); i < list.length; i += 1) {
			var identifier = list[i];

			var name = identifier.name;

			var declaration = { name, node: identifier, kind, instances: [] };
			this.declarations[name] = declaration;

			if (this.isBlockScope) {
				if (!this.functionScope.blockScopedDeclarations[name])
					{ this.functionScope.blockScopedDeclarations[name] = []; }
				this.functionScope.blockScopedDeclarations[name].push(declaration);
			}
		}
	},

	addReference(identifier) {
		if (this.consolidated) {
			this.consolidateReference(identifier);
		} else {
			this.identifiers.push(identifier);
		}
	},

	consolidate() {
		for (var i = 0; i < this.identifiers.length; i += 1) {
			// we might push to the array during consolidation, so don't cache length
			var identifier = this.identifiers[i];
			this.consolidateReference(identifier);
		}

		this.consolidated = true; // TODO understand why this is necessary... seems bad
	},

	consolidateReference(identifier) {
		var declaration = this.declarations[identifier.name];
		if (declaration) {
			declaration.instances.push(identifier);
		} else {
			this.references[identifier.name] = true;
			if (this.parent) { this.parent.addReference(identifier); }
		}
	},

	contains(name) {
		return (
			this.declarations[name] ||
			(this.parent ? this.parent.contains(name) : false)
		);
	},

	createIdentifier(base) {
		if (typeof base === 'number') { base = base.toString(); }

		base = base
			.replace(/\s/g, '')
			.replace(/\[([^\]]+)\]/g, '_$1')
			.replace(/[^a-zA-Z0-9_$]/g, '_')
			.replace(/_{2,}/, '_');

		var name = base;
		var counter = 1;

		while (
			this.declarations[name] ||
			this.references[name] ||
			this.aliases[name] ||
			name in reserved
		) {
			name = `${base}$${counter++}`;
		}

		this.aliases[name] = true;
		return name;
	},

	createDeclaration(base) {
		var id = this.createIdentifier(base);
		this.createDeclarationCallback(id);
		return id;
	},

	findDeclaration(name) {
		return (
			this.declarations[name] ||
			(this.parent && this.parent.findDeclaration(name))
		);
	},

	// Sometimes, block scope declarations change name during transpilation
	resolveName(name) {
		var declaration = this.findDeclaration(name);
		return declaration ? declaration.name : name;
	}
};

function locate(source, index) {
	var lines = source.split('\n');
	var len = lines.length;

	var lineStart = 0;
	var i;

	for (i = 0; i < len; i += 1) {
		var line = lines[i];
		var lineEnd = lineStart + line.length + 1; // +1 for newline

		if (lineEnd > index) {
			return { line: i + 1, column: index - lineStart, char: i };
		}

		lineStart = lineEnd;
	}

	throw new Error('Could not determine location of character');
}

function pad(num, len) {
	var result = String(num);
	return result + repeat(' ', len - result.length);
}

function repeat(str, times) {
	var result = '';
	while (times--) { result += str; }
	return result;
}

function getSnippet(source, loc, length) {
	if ( length === void 0 ) length = 1;

	var first = Math.max(loc.line - 5, 0);
	var last = loc.line;

	var numDigits = String(last).length;

	var lines = source.split('\n').slice(first, last);

	var lastLine = lines[lines.length - 1];
	var offset = lastLine.slice(0, loc.column).replace(/\t/g, '  ').length;

	var snippet = lines
		.map((line, i) => `${pad(i + first + 1, numDigits)} : ${line.replace(/\t/g, '  ')}`)
		.join('\n');

	snippet += '\n' + repeat(' ', numDigits + 3 + offset) + repeat('^', length);

	return snippet;
}

class CompileError extends Error {
	constructor(message, node) {
		super(message);

		this.name = 'CompileError';
		if (!node) {
			return;
		}

		var source = node.program.magicString.original;
		var loc = locate(source, node.start);

		this.message = message + ` (${loc.line}:${loc.column})`;

		this.stack = new Error().stack.replace(
			new RegExp(`.+new ${this.name}.+\\n`, 'm'),
			''
		);

		this.loc = loc;
		this.snippet = getSnippet(source, loc, node.end - node.start);
	}

	toString() {
		return `${this.name}: ${this.message}\n${this.snippet}`;
	}

	static missingTransform(feature, transformKey, node, dangerousKey) {
		if ( dangerousKey === void 0 ) dangerousKey = null;

		var maybeDangerous = dangerousKey ? `, or \`transforms: { ${dangerousKey}: true }\` if you know what you're doing` : '';
		throw new CompileError(`Transforming ${feature} is not ${dangerousKey ? "fully supported" : "implemented"}. Use \`transforms: { ${transformKey}: false }\` to skip transformation and disable this error${maybeDangerous}.`, node);
	}
}

class BlockStatement extends Node {
	createScope() {
		this.parentIsFunction = /Function/.test(this.parent.type);
		this.isFunctionBlock = this.parentIsFunction || this.parent.type === 'Root';
		this.scope = new Scope({
			block: !this.isFunctionBlock,
			parent: this.parent.findScope(false),
			declare: id => this.createdDeclarations.push(id)
		});

		if (this.parentIsFunction) {
			this.parent.params.forEach(node => {
				this.scope.addDeclaration(node, 'param');
			});
		}
	}

	initialise(transforms) {
		this.thisAlias = null;
		this.argumentsAlias = null;
		this.defaultParameters = [];
		this.createdDeclarations = [];

		// normally the scope gets created here, during initialisation,
		// but in some cases (e.g. `for` statements), we need to create
		// the scope early, as it pertains to both the init block and
		// the body of the statement
		if (!this.scope) { this.createScope(); }

		this.body.forEach(node => node.initialise(transforms));

		this.scope.consolidate();
	}

	findLexicalBoundary() {
		if (this.type === 'Program') { return this; }
		if (/^Function/.test(this.parent.type)) { return this; }

		return this.parent.findLexicalBoundary();
	}

	findScope(functionScope) {
		return this.scope;
	}

	getIndentation() {
		return this.indentation;
	}

	transpile(code, transforms) {
		var indentation = this.getIndentation();

		var introStatementGenerators = [];

		if (/Function/.test(this.parent.type)) {
			this.transpileParameters(
				this.parent.params,
				code,
				transforms,
				indentation,
				introStatementGenerators
			);
		}

		super.transpile(code, transforms);
	}
	transpileParameters() { }
}

class ArrowFunctionExpression extends Node {
	initialise(transforms) {
		this.body.createScope();
		super.initialise(transforms);
	}

	transpile(code, transforms) {
		var openParensPos = this.start;
		for (var end = (this.body || this.params[0]).start - 1; code.original[openParensPos] !== '(' && openParensPos < end;) {
			++openParensPos;
		}
		if (code.original[openParensPos] !== '(') { openParensPos = -1; }

    super.transpile(code, transforms);
	}

	// Returns whether any transforms that will happen use `arguments`
	needsArguments(transforms) {
		return false;
	}
}

function isReference(node, parent) {
	if (node.type === 'MemberExpression') {
		return !node.computed && isReference(node.object, node);
	}

	if (node.type === 'Identifier') {
		// the only time we could have an identifier node without a parent is
		// if it's the entire body of a function without a block statement –
		// i.e. an arrow function expression like `a => a`
		if (!parent) { return true; }

		if (/(Function|Class)Expression/.test(parent.type)) { return false; }

		if (parent.type === 'VariableDeclarator') { return node === parent.init; }

		// TODO is this right?
		if (
			parent.type === 'MemberExpression' ||
			parent.type === 'MethodDefinition'
		) {
			return parent.computed || node === parent.object;
		}

		if (parent.type === 'ArrayPattern') { return false; }

		// disregard the `bar` in `{ bar: foo }`, but keep it in `{ [bar]: foo }`
		if (parent.type === 'Property') {
			if (parent.parent.type === 'ObjectPattern') { return false; }
			return parent.computed || node === parent.value;
		}

		// disregard the `bar` in `class Foo { bar () {...} }`
		if (parent.type === 'MethodDefinition') { return false; }

		// disregard the `bar` in `export { foo as bar }`
		if (parent.type === 'ExportSpecifier' && node !== parent.local)
			{ return false; }

		return true;
	}
}

class Identifier extends Node {
	findScope(functionScope) {
		if (this.parent.params && ~this.parent.params.indexOf(this)) {
			return this.parent.body.scope;
		}

		if (this.parent.type === 'FunctionExpression' && this === this.parent.id) {
			return this.parent.body.scope;
		}

		return this.parent.findScope(functionScope);
	}

	initialise(transforms) {
		if (this.isLabel()) {
			return;
		}

		if (isReference(this, this.parent)) {
			this.findScope(false).addReference(this);
		}
	}

	isLabel() {
		switch (this.parent.type) {
			case 'BreakStatement': return true;
			case 'ContinueStatement': return true;
			case 'LabeledStatement': return true;
			default: return false;
		}
	}

	transpile(code) {
		if (this.alias) {
			code.overwrite(this.start, this.end, this.alias, {
				storeName: true,
				contentOnly: true
			});
		}
	}
}

var hasDashes = val => /-/.test(val);

var formatKey = key => (hasDashes(key) ? `'${key}'` : key);

var formatVal = val => (val ? '' : 'true');

class JSXAttribute extends Node {
	transpile(code, transforms) {
		var ref = this.name;
		var start = ref.start;
		var name = ref.name;

		// Overwrite equals sign if value is present.
		var end = this.value ? this.value.start : this.name.end;

		code.overwrite(start, end, `${formatKey(name)}: ${formatVal(this.value)}`);

		super.transpile(code, transforms);
	}
}

function containsNewLine$1(node) {
	return (
		node.type === 'JSXText' && !/\S/.test(node.value) && /\n/.test(node.value)
	);
}

class JSXClosingElement extends Node {
	transpile(code) {
		var spaceBeforeParen = true;

		var lastChild = this.parent.children[this.parent.children.length - 1];

		// omit space before closing paren if
		//   a) this is on a separate line, or
		//   b) there are no children but there are attributes
		if (
			(lastChild && containsNewLine$1(lastChild)) ||
			this.parent.openingElement.attributes.length
		) {
			spaceBeforeParen = false;
		}

		code.overwrite(this.start, this.end, spaceBeforeParen ? ' )' : ')');
	}
}

function containsNewLine(node) {
	return (
		node.type === 'JSXText' && !/\S/.test(node.value) && /\n/.test(node.value)
	);
}

class JSXClosingFragment extends Node {
	transpile(code) {
		var spaceBeforeParen = true;

		var lastChild = this.parent.children[this.parent.children.length - 1];

		// omit space before closing paren if this is on a separate line
		if (lastChild && containsNewLine(lastChild)) {
			spaceBeforeParen = false;
		}

		code.overwrite(this.start, this.end, spaceBeforeParen ? ' )' : ')');
	}
}

function normalise(str, removeTrailingWhitespace) {

	if (removeTrailingWhitespace && /\n/.test(str)) {
		str = str.replace(/[ \f\n\r\t\v]+$/, '');
	}

	str = str
		.replace(/^\n\r?[ \f\n\r\t\v]+/, '') // remove leading newline + space
		.replace(/[ \f\n\r\t\v]*\n\r?[ \f\n\r\t\v]*/gm, ' '); // replace newlines with spaces

	// TODO prefer single quotes?
	return JSON.stringify(str);
}

class JSXElement extends Node {
	transpile(code, transforms) {
		super.transpile(code, transforms);

		var children = this.children.filter(child => {
			if (child.type !== 'JSXText') { return true; }

			// remove whitespace-only literals, unless on a single line
			return /[^ \f\n\r\t\v]/.test(child.raw) || !/\n/.test(child.raw);
		});

		if (children.length) {
			var c = (this.openingElement || this.openingFragment).end;

			var i;
			for (i = 0; i < children.length; i += 1) {
				var child = children[i];

				if (
					child.type === 'JSXExpressionContainer' &&
					child.expression.type === 'JSXEmptyExpression'
				) ; else {
					var tail =
						code.original[c] === '\n' && child.type !== 'JSXText' ? '' : ' ';
					code.appendLeft(c, `,${tail}`);
				}

				if (child.type === 'JSXText') {
					var str = normalise(child.value, i === children.length - 1);
					code.overwrite(child.start, child.end, str);
				}

				c = child.end;
			}
		}
	}
}

class JSXExpressionContainer extends Node {
	transpile(code, transforms) {
		code.remove(this.start, this.expression.start);
		code.remove(this.expression.end, this.end);

		super.transpile(code, transforms);
	}
}

class JSXFragment extends JSXElement {
}

class JSXOpeningElement extends Node {
	transpile(code, transforms) {
		super.transpile(code, transforms);

		code.overwrite(this.start, this.name.start, `${this.program.jsx}( `);

		var html =
			this.name.type === 'JSXIdentifier' &&
			this.name.name[0] === this.name.name[0].toLowerCase();
		if (html) { code.prependRight(this.name.start, `'`); }

		var len = this.attributes.length;
		var c = this.name.end;

		if (len) {
			var i;

			var hasSpread = false;
			for (i = 0; i < len; i += 1) {
				if (this.attributes[i].type === 'JSXSpreadAttribute') {
					hasSpread = true;
					break;
				}
			}

			c = this.attributes[0].end;

			for (i = 0; i < len; i += 1) {
				var attr = this.attributes[i];

				if (i > 0) {
					if (attr.start === c) { code.prependRight(c, ', '); }
					else { code.overwrite(c, attr.start, ', '); }
				}

				if (hasSpread && attr.type !== 'JSXSpreadAttribute') {
					var lastAttr = this.attributes[i - 1];
					var nextAttr = this.attributes[i + 1];

					if (!lastAttr || lastAttr.type === 'JSXSpreadAttribute') {
						code.prependRight(attr.start, '{ ');
					}

					if (!nextAttr || nextAttr.type === 'JSXSpreadAttribute') {
						code.appendLeft(attr.end, ' }');
					}
				}

				c = attr.end;
			}

			var after;
			var before;
			if (hasSpread) {
				if (len === 1) {
					before = html ? `',` : ',';
				} else {
					if (!this.program.options.objectAssign) {
						throw new CompileError(
							"Mixed JSX attributes ending in spread requires specified objectAssign option with 'Object.assign' or polyfill helper.",
							this
						);
					}
					before = html
						? `', ${this.program.options.objectAssign}({},`
						: `, ${this.program.options.objectAssign}({},`;
					after = ')';
				}
			} else {
				before = html ? `', {` : ', {';
				after = ' }';
			}

			code.prependRight(this.name.end, before);

			if (after) {
				code.appendLeft(this.attributes[len - 1].end, after);
			}
		} else {
			code.appendLeft(this.name.end, html ? `', null` : `, null`);
			c = this.name.end;
		}

		if (this.selfClosing) {
			code.overwrite(c, this.end, this.attributes.length ? `)` : ` )`);
		} else {
			code.remove(c, this.end);
		}
	}
}

class JSXOpeningFragment extends Node {
	transpile(code) {
		code.overwrite(this.start, this.end, `${this.program.jsx}( ${this.program.jsxFragment}, null`);
	}
}

class JSXSpreadAttribute extends Node {
	transpile(code, transforms) {
		code.remove(this.start, this.argument.start);
		code.remove(this.argument.end, this.end);

		super.transpile(code, transforms);
	}
}

var nonAsciiLsOrPs = /[\u2028-\u2029]/g;

class Literal extends Node {
	initialise() {
		if (typeof this.value === 'string') {
			this.program.indentExclusionElements.push(this);
		}
	}

	transpile(code, transforms) {

		if (this.regex) {
			var ref = this.regex;
			ref.pattern;
			ref.flags;
		} else if (typeof this.value === "string" && this.value.match(nonAsciiLsOrPs)) {
			code.overwrite(
				this.start,
				this.end,
				this.raw.replace(nonAsciiLsOrPs, m => m == '\u2028' ? '\\u2028' : '\\u2029'),
				{
					contentOnly: true
				}
			);
		}
	}
}

class VariableDeclaration extends Node {
	initialise(transforms) {
		this.scope = this.findScope(this.kind === 'var');
		this.declarations.forEach(declarator => declarator.initialise(transforms));
	}

	transpile(code, transforms) {
		this.getIndentation();
		this.kind;

    this.declarations.forEach(declarator => {
      declarator.transpile(code, transforms);
    });
	}
}

class VariableDeclarator extends Node {
	initialise(transforms) {
		var kind = this.parent.kind;
		if (kind === 'let' && this.parent.parent.type === 'ForStatement') {
			kind = 'for.let'; // special case...
		}

		this.parent.scope.addDeclaration(this.id, kind);
		super.initialise(transforms);
	}

	transpile(code, transforms) {
		if (this.id) { this.id.transpile(code, transforms); }
		if (this.init) { this.init.transpile(code, transforms); }
	}

	isLeftDeclaratorOfLoop() {
		return (
			this.parent &&
			this.parent.type === 'VariableDeclaration' &&
			this.parent.parent &&
			(this.parent.parent.type === 'ForInStatement' ||
				this.parent.parent.type === 'ForOfStatement') &&
			this.parent.parent.left &&
			this.parent.parent.left.declarations[0] === this
		);
	}
}

var types = {
	ArrowFunctionExpression,
	Identifier,
	JSXAttribute,
	JSXClosingElement,
	JSXClosingFragment,
	JSXElement,
	JSXExpressionContainer,
	JSXFragment,
	JSXOpeningElement,
	JSXOpeningFragment,
	JSXSpreadAttribute,
	Literal,
	VariableDeclaration,
	VariableDeclarator,
};

var keys = {
	Program: ['body'],
	Literal: []
};

var statementsWithBlocks = {
	IfStatement: 'consequent',
	ForStatement: 'body',
	ForInStatement: 'body',
	ForOfStatement: 'body',
	WhileStatement: 'body',
	DoWhileStatement: 'body',
	ArrowFunctionExpression: 'body'
};

function wrap(raw, parent) {
	if (!raw) { return; }

	if ('length' in raw) {
		var i = raw.length;
		while (i--) { wrap(raw[i], parent); }
		return;
	}

	// with e.g. shorthand properties, key and value are
	// the same node. We don't want to wrap an object twice
	if (raw.__wrapped) { return; }
	raw.__wrapped = true;

	if (!keys[raw.type]) {
		keys[raw.type] = Object.keys(raw).filter(
			key => typeof raw[key] === 'object'
		);
	}

	// special case – body-less if/for/while statements. TODO others?
	var bodyType = statementsWithBlocks[raw.type];
	if (bodyType && raw[bodyType].type !== 'BlockStatement') {
		var expression = raw[bodyType];

		// create a synthetic block statement, otherwise all hell
		// breaks loose when it comes to block scoping
		raw[bodyType] = {
			start: expression.start,
			end: expression.end,
			type: 'BlockStatement',
			body: [expression],
			synthetic: true
		};
	}

	raw.parent = parent;
	raw.program = parent.program || parent;
	raw.depth = parent.depth + 1;
	raw.keys = keys[raw.type];
	raw.indentation = undefined;

	for (var i$1 = 0, list = keys[raw.type]; i$1 < list.length; i$1 += 1) {
		var key = list[i$1];

		wrap(raw[key], raw);
	}

	raw.program.magicString.addSourcemapLocation(raw.start);
	raw.program.magicString.addSourcemapLocation(raw.end);

	var type =
		(raw.type === 'BlockStatement' ? BlockStatement : types[raw.type]) || Node;
	raw.__proto__ = type.prototype;
}

function Program(source, ast, transforms, options) {
	this.type = 'Root';

	// options
	this.jsx = options.jsx || 'React.createElement';
	this.jsxFragment = options.jsxFragment || 'React.Fragment';
	this.options = options;

	this.source = source;
	this.magicString = new MagicString(source);

	this.ast = ast;
	this.depth = 0;

	wrap((this.body = ast), this);
	this.body.__proto__ = BlockStatement.prototype;

	this.templateLiteralQuasis = Object.create(null);
	for (var i = 0; i < this.body.body.length; ++i) {
		if (!this.body.body[i].directive) {
			this.prependAt = this.body.body[i].start;
			break;
		}
	}
	this.objectWithoutPropertiesHelper = null;

	this.indentExclusionElements = [];
	this.body.initialise(transforms);

	this.indentExclusions = Object.create(null);
	for (var i$2 = 0, list = this.indentExclusionElements; i$2 < list.length; i$2 += 1) {
		var node = list[i$2];

		for (var i$1 = node.start; i$1 < node.end; i$1 += 1) {
			this.indentExclusions[i$1] = true;
		}
	}

	this.body.transpile(this.magicString, transforms);
}

Program.prototype = {
	export(options) {
		if ( options === void 0 ) options = {};

		return {
			code: this.magicString.toString(),
			map: this.magicString.generateMap({
				file: options.file,
				source: options.source,
				includeContent: options.includeContent !== false
			})
		};
	},

	findNearest() {
		return null;
	},

	findScope() {
		return null;
	},

	getObjectWithoutPropertiesHelper(code) {
		if (!this.objectWithoutPropertiesHelper) {
			this.objectWithoutPropertiesHelper = this.body.scope.createIdentifier('objectWithoutProperties');
			code.prependLeft(this.prependAt, `function ${this.objectWithoutPropertiesHelper} (obj, exclude) { ` +
				`var target = {}; for (var k in obj) ` +
				`if (Object.prototype.hasOwnProperty.call(obj, k) && exclude.indexOf(k) === -1) ` +
				`target[k] = obj[k]; return target; }\n`
			);
		}
		return this.objectWithoutPropertiesHelper;
	}
};

var version = "0.20.0";

var parser = Parser.extend(acornJsx());

function transform(source, options) {
	if ( options === void 0 ) options = {};

	var ast;
	var jsx = null;

	try {
		ast = parser.parse(source, {
			ecmaVersion: 10,
			preserveParens: true,
			sourceType: 'module',
			allowAwaitOutsideFunction: true,
			allowReturnOutsideFunction: true,
			allowHashBang: true,
			onComment: (block, text) => {
				if (!jsx) {
					var match = /@jsx\s+([^\s]+)/.exec(text);
					if (match) { jsx = match[1]; }
				}
			}
		});
		options.jsx = jsx || options.jsx;
	} catch (err) {
		err.snippet = getSnippet(source, err.loc);
		err.toString = () => `${err.name}: ${err.message}\n${err.snippet}`;
		throw err;
	}

	var transforms = {};
	Object.keys(options.transforms || {}).forEach(name => {
		if (name === 'modules') {
			if (!('moduleImport' in options.transforms))
				{ transforms.moduleImport = options.transforms.modules; }
			if (!('moduleExport' in options.transforms))
				{ transforms.moduleExport = options.transforms.modules; }
			return;
		}

		if (!(name in transforms)) { throw new Error(`Unknown transform '${name}'`); }
		transforms[name] = options.transforms[name];
	});
	if (options.objectAssign === true) { options.objectAssign = 'Object.assign'; }
	return new Program(source, ast, transforms, options).export(options);
}

export { version as VERSION, transform };
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