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jsx.ts
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/*@internal*/
namespace ts {
export function transformJsx(context: TransformationContext) {
interface PerFileState {
importSpecifier?: string;
filenameDeclaration?: VariableDeclaration & { name: Identifier; };
utilizedImplicitRuntimeImports?: Map<ImportSpecifier>;
}
const {
factory,
getEmitHelperFactory: emitHelpers,
} = context;
const compilerOptions = context.getCompilerOptions();
let currentSourceFile: SourceFile;
let currentFileState!: PerFileState;
return chainBundle(context, transformSourceFile);
function getCurrentFileNameExpression(): Identifier {
if (currentFileState.filenameDeclaration) {
return currentFileState.filenameDeclaration.name;
}
const declaration = factory.createVariableDeclaration(factory.createUniqueName("_jsxFileName", GeneratedIdentifierFlags.Optimistic | GeneratedIdentifierFlags.FileLevel), /*exclaimationToken*/ undefined, /*type*/ undefined, factory.createStringLiteral(currentSourceFile.fileName));
currentFileState.filenameDeclaration = declaration as VariableDeclaration & { name: Identifier };
return currentFileState.filenameDeclaration.name;
}
function getJsxFactoryCalleePrimitive(children: readonly JsxChild[] | undefined): "jsx" | "jsxs" | "jsxDEV" {
return compilerOptions.jsx === JsxEmit.ReactJSXDev ? "jsxDEV" : children && children.length > 1 ? "jsxs" : "jsx";
}
function getJsxFactoryCallee(children: readonly JsxChild[] | undefined) {
const type = getJsxFactoryCalleePrimitive(children);
return getImplicitImportForName(type);
}
function getImplicitJsxFragmentReference() {
return getImplicitImportForName("Fragment");
}
function getImplicitImportForName(name: string) {
const existing = currentFileState.utilizedImplicitRuntimeImports?.get(name);
if (existing) {
return existing.name;
}
if (!currentFileState.utilizedImplicitRuntimeImports) {
currentFileState.utilizedImplicitRuntimeImports = createMap();
}
const generatedName = factory.createUniqueName(`_${name}`, GeneratedIdentifierFlags.Optimistic | GeneratedIdentifierFlags.FileLevel | GeneratedIdentifierFlags.AllowNameSubstitution);
const specifier = factory.createImportSpecifier(factory.createIdentifier(name), generatedName);
generatedName.generatedImportReference = specifier;
currentFileState.utilizedImplicitRuntimeImports.set(name, specifier);
return generatedName;
}
/**
* Transform JSX-specific syntax in a SourceFile.
*
* @param node A SourceFile node.
*/
function transformSourceFile(node: SourceFile) {
if (node.isDeclarationFile) {
return node;
}
currentSourceFile = node;
currentFileState = {};
currentFileState.importSpecifier = getJSXImplicitImportBase(compilerOptions, node);
let visited = visitEachChild(node, visitor, context);
addEmitHelpers(visited, context.readEmitHelpers());
let statements: readonly Statement[] = visited.statements;
if (currentFileState.filenameDeclaration) {
statements = insertStatementAfterCustomPrologue(statements.slice(), factory.createVariableStatement(/*modifiers*/ undefined, factory.createVariableDeclarationList([currentFileState.filenameDeclaration], NodeFlags.Const)));
}
if (currentFileState.utilizedImplicitRuntimeImports && currentFileState.utilizedImplicitRuntimeImports.size && currentFileState.importSpecifier !== undefined) {
const specifier = `${currentFileState.importSpecifier}/${compilerOptions.jsx === JsxEmit.ReactJSXDev ? "jsx-dev-runtime.js" : "jsx-runtime.js"}`;
if (isExternalModule(node)) {
// Add `import` statement
const importStatement = factory.createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, factory.createImportClause(/*typeOnly*/ false, /*name*/ undefined, factory.createNamedImports(arrayFrom(currentFileState.utilizedImplicitRuntimeImports.values()))), factory.createStringLiteral(specifier));
setParentRecursive(importStatement, /*incremental*/ false);
statements = insertStatementAfterCustomPrologue(statements.slice(), importStatement);
}
else if (isExternalOrCommonJsModule(node)) {
// Add `require` statement
const requireStatement = factory.createVariableStatement(/*modifiers*/ undefined, factory.createVariableDeclarationList([
factory.createVariableDeclaration(
factory.createObjectBindingPattern(map(arrayFrom(currentFileState.utilizedImplicitRuntimeImports.values()), s => factory.createBindingElement(/*dotdotdot*/ undefined, s.propertyName, s.name))),
/*exclaimationToken*/ undefined,
/*type*/ undefined,
factory.createCallExpression(factory.createIdentifier("require"), /*typeArguments*/ undefined, [factory.createStringLiteral(specifier)])
)
], NodeFlags.Const));
setParentRecursive(requireStatement, /*incremental*/ false);
statements = insertStatementAfterCustomPrologue(statements.slice(), requireStatement);
}
else {
// Do nothing (script file) - consider an error in the checker?
}
}
if (statements !== visited.statements) {
visited = factory.updateSourceFile(visited, statements);
}
currentFileState = undefined!;
return visited;
}
function visitor(node: Node): VisitResult<Node> {
if (node.transformFlags & TransformFlags.ContainsJsx) {
return visitorWorker(node);
}
else {
return node;
}
}
function visitorWorker(node: Node): VisitResult<Node> {
switch (node.kind) {
case SyntaxKind.JsxElement:
return visitJsxElement(<JsxElement>node, /*isChild*/ false);
case SyntaxKind.JsxSelfClosingElement:
return visitJsxSelfClosingElement(<JsxSelfClosingElement>node, /*isChild*/ false);
case SyntaxKind.JsxFragment:
return visitJsxFragment(<JsxFragment>node, /*isChild*/ false);
case SyntaxKind.JsxExpression:
return visitJsxExpression(<JsxExpression>node);
default:
return visitEachChild(node, visitor, context);
}
}
function transformJsxChildToExpression(node: JsxChild): Expression | undefined {
switch (node.kind) {
case SyntaxKind.JsxText:
return visitJsxText(node);
case SyntaxKind.JsxExpression:
return visitJsxExpression(node);
case SyntaxKind.JsxElement:
return visitJsxElement(node, /*isChild*/ true);
case SyntaxKind.JsxSelfClosingElement:
return visitJsxSelfClosingElement(node, /*isChild*/ true);
case SyntaxKind.JsxFragment:
return visitJsxFragment(node, /*isChild*/ true);
default:
return Debug.failBadSyntaxKind(node);
}
}
/**
* The react jsx/jsxs transform falls back to `createElement` when an explicit `key` argument comes after a spread
*/
function hasKeyAfterPropsSpread(node: JsxOpeningLikeElement) {
let spread = false;
for (const elem of node.attributes.properties) {
if (isJsxSpreadAttribute(elem)) {
spread = true;
}
else if (spread && isJsxAttribute(elem) && elem.name.escapedText === "key") {
return true;
}
}
return false;
}
function shouldUseCreateElement(node: JsxOpeningLikeElement) {
return currentFileState.importSpecifier === undefined || hasKeyAfterPropsSpread(node);
}
function visitJsxElement(node: JsxElement, isChild: boolean) {
const tagTransform = shouldUseCreateElement(node.openingElement) ? visitJsxOpeningLikeElementCreateElement : visitJsxOpeningLikeElementJSX;
return tagTransform(node.openingElement, node.children, isChild, /*location*/ node);
}
function visitJsxSelfClosingElement(node: JsxSelfClosingElement, isChild: boolean) {
const tagTransform = shouldUseCreateElement(node) ? visitJsxOpeningLikeElementCreateElement : visitJsxOpeningLikeElementJSX;
return tagTransform(node, /*children*/ undefined, isChild, /*location*/ node);
}
function visitJsxFragment(node: JsxFragment, isChild: boolean) {
const tagTransform = currentFileState.importSpecifier === undefined ? visitJsxOpeningFragmentCreateElement : visitJsxOpeningFragmentJSX;
return tagTransform(node.openingFragment, node.children, isChild, /*location*/ node);
}
function convertJsxChildrenToChildrenPropObject(children: readonly JsxChild[]) {
if (children.length === 1) {
const result = transformJsxChildToExpression(children[0]);
return result && factory.createObjectLiteralExpression([
factory.createPropertyAssignment("children", result)
]);
}
const result = mapDefined(children, transformJsxChildToExpression);
return !result.length ? undefined : factory.createObjectLiteralExpression([
factory.createPropertyAssignment("children", factory.createArrayLiteralExpression(result))
]);
}
function visitJsxOpeningLikeElementJSX(node: JsxOpeningLikeElement, children: readonly JsxChild[] | undefined, isChild: boolean, location: TextRange) {
const tagName = getTagName(node);
let objectProperties: Expression;
const keyAttr = find(node.attributes.properties, p => !!p.name && isIdentifier(p.name) && p.name.escapedText === "key") as JsxAttribute | undefined;
const attrs = keyAttr ? filter(node.attributes.properties, p => p !== keyAttr) : node.attributes.properties;
let segments: Expression[] = [];
if (attrs.length) {
// Map spans of JsxAttribute nodes into object literals and spans
// of JsxSpreadAttribute nodes into expressions.
segments = flatten(
spanMap(attrs, isJsxSpreadAttribute, (attrs, isSpread) => isSpread
? map(attrs, transformJsxSpreadAttributeToExpression)
: factory.createObjectLiteralExpression(map(attrs, transformJsxAttributeToObjectLiteralElement))
)
);
if (isJsxSpreadAttribute(attrs[0])) {
// We must always emit at least one object literal before a spread
// argument.factory.createObjectLiteral
segments.unshift(factory.createObjectLiteralExpression());
}
}
if (children && children.length) {
const result = convertJsxChildrenToChildrenPropObject(children);
if (result) {
segments.push(result);
}
}
if (segments.length === 0) {
objectProperties = factory.createObjectLiteralExpression([]);
// When there are no attributes, React wants {}
}
else {
// Either emit one big object literal (no spread attribs), or
// a call to the __assign helper.
objectProperties = singleOrUndefined(segments) || emitHelpers().createAssignHelper(segments);
}
return visitJsxOpeningLikeElementOrFragmentJSX(tagName, objectProperties, keyAttr, children, isChild, location);
}
function visitJsxOpeningLikeElementOrFragmentJSX(tagName: Expression, objectProperties: Expression, keyAttr: JsxAttribute | undefined, children: readonly JsxChild[] | undefined, isChild: boolean, location: TextRange) {
const args: Expression[] = [tagName, objectProperties, !keyAttr ? factory.createVoidZero() : transformJsxAttributeInitializer(keyAttr.initializer)];
if (compilerOptions.jsx === JsxEmit.ReactJSXDev) {
const originalFile = getOriginalNode(currentSourceFile);
if (originalFile && isSourceFile(originalFile)) {
// isStaticChildren development flag
args.push(children && children.length > 1 ? factory.createTrue() : factory.createFalse());
// __source development flag
const lineCol = getLineAndCharacterOfPosition(originalFile, location.pos);
args.push(factory.createObjectLiteralExpression([
factory.createPropertyAssignment("fileName", getCurrentFileNameExpression()),
factory.createPropertyAssignment("lineNumber", factory.createNumericLiteral(lineCol.line + 1)),
factory.createPropertyAssignment("columnNumber", factory.createNumericLiteral(lineCol.character + 1))
]));
// __self development flag
args.push(factory.createThis());
}
}
const element = setTextRange(factory.createCallExpression(getJsxFactoryCallee(children), /*typeArguments*/ undefined, args), location);
if (isChild) {
startOnNewLine(element);
}
return element;
}
function visitJsxOpeningLikeElementCreateElement(node: JsxOpeningLikeElement, children: readonly JsxChild[] | undefined, isChild: boolean, location: TextRange) {
const tagName = getTagName(node);
let objectProperties: Expression | undefined;
const attrs = node.attributes.properties;
if (attrs.length === 0) {
objectProperties = factory.createNull();
// When there are no attributes, React wants "null"
}
else {
// Map spans of JsxAttribute nodes into object literals and spans
// of JsxSpreadAttribute nodes into expressions.
const segments = flatten<Expression | ObjectLiteralExpression>(
spanMap(attrs, isJsxSpreadAttribute, (attrs, isSpread) => isSpread
? map(attrs, transformJsxSpreadAttributeToExpression)
: factory.createObjectLiteralExpression(map(attrs, transformJsxAttributeToObjectLiteralElement))
)
);
if (isJsxSpreadAttribute(attrs[0])) {
// We must always emit at least one object literal before a spread
// argument.factory.createObjectLiteral
segments.unshift(factory.createObjectLiteralExpression());
}
// Either emit one big object literal (no spread attribs), or
// a call to the __assign helper.
objectProperties = singleOrUndefined(segments);
if (!objectProperties) {
objectProperties = emitHelpers().createAssignHelper(segments);
}
}
const element = createExpressionForJsxElement(
factory,
context.getEmitResolver().getJsxFactoryEntity(currentSourceFile),
compilerOptions.reactNamespace!, // TODO: GH#18217
tagName,
objectProperties,
mapDefined(children, transformJsxChildToExpression),
node,
location
);
if (isChild) {
startOnNewLine(element);
}
return element;
}
function visitJsxOpeningFragmentJSX(_node: JsxOpeningFragment, children: readonly JsxChild[], isChild: boolean, location: TextRange) {
let childrenProps: Expression | undefined;
if (children && children.length) {
const result = convertJsxChildrenToChildrenPropObject(children);
if (result) {
childrenProps = result;
}
}
return visitJsxOpeningLikeElementOrFragmentJSX(
getImplicitJsxFragmentReference(),
childrenProps || factory.createObjectLiteralExpression([]),
/*keyAttr*/ undefined,
children,
isChild,
location
);
}
function visitJsxOpeningFragmentCreateElement(node: JsxOpeningFragment, children: readonly JsxChild[], isChild: boolean, location: TextRange) {
const element = createExpressionForJsxFragment(
factory,
context.getEmitResolver().getJsxFactoryEntity(currentSourceFile),
context.getEmitResolver().getJsxFragmentFactoryEntity(currentSourceFile),
compilerOptions.reactNamespace!, // TODO: GH#18217
mapDefined(children, transformJsxChildToExpression),
node,
location
);
if (isChild) {
startOnNewLine(element);
}
return element;
}
function transformJsxSpreadAttributeToExpression(node: JsxSpreadAttribute) {
return visitNode(node.expression, visitor, isExpression);
}
function transformJsxAttributeToObjectLiteralElement(node: JsxAttribute) {
const name = getAttributeName(node);
const expression = transformJsxAttributeInitializer(node.initializer);
return factory.createPropertyAssignment(name, expression);
}
function transformJsxAttributeInitializer(node: StringLiteral | JsxExpression | undefined): Expression {
if (node === undefined) {
return factory.createTrue();
}
else if (node.kind === SyntaxKind.StringLiteral) {
// Always recreate the literal to escape any escape sequences or newlines which may be in the original jsx string and which
// Need to be escaped to be handled correctly in a normal string
const singleQuote = node.singleQuote !== undefined ? node.singleQuote : !isStringDoubleQuoted(node, currentSourceFile);
const literal = factory.createStringLiteral(tryDecodeEntities(node.text) || node.text, singleQuote);
return setTextRange(literal, node);
}
else if (node.kind === SyntaxKind.JsxExpression) {
if (node.expression === undefined) {
return factory.createTrue();
}
return visitNode(node.expression, visitor, isExpression);
}
else {
return Debug.failBadSyntaxKind(node);
}
}
function visitJsxText(node: JsxText): StringLiteral | undefined {
const fixed = fixupWhitespaceAndDecodeEntities(node.text);
return fixed === undefined ? undefined : factory.createStringLiteral(fixed);
}
/**
* JSX trims whitespace at the end and beginning of lines, except that the
* start/end of a tag is considered a start/end of a line only if that line is
* on the same line as the closing tag. See examples in
* tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
* See also https://www.w3.org/TR/html4/struct/text.html#h-9.1 and https://www.w3.org/TR/CSS2/text.html#white-space-model
*
* An equivalent algorithm would be:
* - If there is only one line, return it.
* - If there is only whitespace (but multiple lines), return `undefined`.
* - Split the text into lines.
* - 'trimRight' the first line, 'trimLeft' the last line, 'trim' middle lines.
* - Decode entities on each line (individually).
* - Remove empty lines and join the rest with " ".
*/
function fixupWhitespaceAndDecodeEntities(text: string): string | undefined {
let acc: string | undefined;
// First non-whitespace character on this line.
let firstNonWhitespace = 0;
// Last non-whitespace character on this line.
let lastNonWhitespace = -1;
// These initial values are special because the first line is:
// firstNonWhitespace = 0 to indicate that we want leading whitsepace,
// but lastNonWhitespace = -1 as a special flag to indicate that we *don't* include the line if it's all whitespace.
for (let i = 0; i < text.length; i++) {
const c = text.charCodeAt(i);
if (isLineBreak(c)) {
// If we've seen any non-whitespace characters on this line, add the 'trim' of the line.
// (lastNonWhitespace === -1 is a special flag to detect whether the first line is all whitespace.)
if (firstNonWhitespace !== -1 && lastNonWhitespace !== -1) {
acc = addLineOfJsxText(acc, text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1));
}
// Reset firstNonWhitespace for the next line.
// Don't bother to reset lastNonWhitespace because we ignore it if firstNonWhitespace = -1.
firstNonWhitespace = -1;
}
else if (!isWhiteSpaceSingleLine(c)) {
lastNonWhitespace = i;
if (firstNonWhitespace === -1) {
firstNonWhitespace = i;
}
}
}
return firstNonWhitespace !== -1
// Last line had a non-whitespace character. Emit the 'trimLeft', meaning keep trailing whitespace.
? addLineOfJsxText(acc, text.substr(firstNonWhitespace))
// Last line was all whitespace, so ignore it
: acc;
}
function addLineOfJsxText(acc: string | undefined, trimmedLine: string): string {
// We do not escape the string here as that is handled by the printer
// when it emits the literal. We do, however, need to decode JSX entities.
const decoded = decodeEntities(trimmedLine);
return acc === undefined ? decoded : acc + " " + decoded;
}
/**
* Replace entities like " ", "{", and "�" with the characters they encode.
* See https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
*/
function decodeEntities(text: string): string {
return text.replace(/&((#((\d+)|x([\da-fA-F]+)))|(\w+));/g, (match, _all, _number, _digits, decimal, hex, word) => {
if (decimal) {
return utf16EncodeAsString(parseInt(decimal, 10));
}
else if (hex) {
return utf16EncodeAsString(parseInt(hex, 16));
}
else {
const ch = entities.get(word);
// If this is not a valid entity, then just use `match` (replace it with itself, i.e. don't replace)
return ch ? utf16EncodeAsString(ch) : match;
}
});
}
/** Like `decodeEntities` but returns `undefined` if there were no entities to decode. */
function tryDecodeEntities(text: string): string | undefined {
const decoded = decodeEntities(text);
return decoded === text ? undefined : decoded;
}
function getTagName(node: JsxElement | JsxOpeningLikeElement): Expression {
if (node.kind === SyntaxKind.JsxElement) {
return getTagName(node.openingElement);
}
else {
const name = node.tagName;
if (isIdentifier(name) && isIntrinsicJsxName(name.escapedText)) {
return factory.createStringLiteral(idText(name));
}
else {
return createExpressionFromEntityName(factory, name);
}
}
}
/**
* Emit an attribute name, which is quoted if it needs to be quoted. Because
* these emit into an object literal property name, we don't need to be worried
* about keywords, just non-identifier characters
*/
function getAttributeName(node: JsxAttribute): StringLiteral | Identifier {
const name = node.name;
const text = idText(name);
if (/^[A-Za-z_]\w*$/.test(text)) {
return name;
}
else {
return factory.createStringLiteral(text);
}
}
function visitJsxExpression(node: JsxExpression) {
return visitNode(node.expression, visitor, isExpression);
}
}
const entities = new Map(getEntries({
quot: 0x0022,
amp: 0x0026,
apos: 0x0027,
lt: 0x003C,
gt: 0x003E,
nbsp: 0x00A0,
iexcl: 0x00A1,
cent: 0x00A2,
pound: 0x00A3,
curren: 0x00A4,
yen: 0x00A5,
brvbar: 0x00A6,
sect: 0x00A7,
uml: 0x00A8,
copy: 0x00A9,
ordf: 0x00AA,
laquo: 0x00AB,
not: 0x00AC,
shy: 0x00AD,
reg: 0x00AE,
macr: 0x00AF,
deg: 0x00B0,
plusmn: 0x00B1,
sup2: 0x00B2,
sup3: 0x00B3,
acute: 0x00B4,
micro: 0x00B5,
para: 0x00B6,
middot: 0x00B7,
cedil: 0x00B8,
sup1: 0x00B9,
ordm: 0x00BA,
raquo: 0x00BB,
frac14: 0x00BC,
frac12: 0x00BD,
frac34: 0x00BE,
iquest: 0x00BF,
Agrave: 0x00C0,
Aacute: 0x00C1,
Acirc: 0x00C2,
Atilde: 0x00C3,
Auml: 0x00C4,
Aring: 0x00C5,
AElig: 0x00C6,
Ccedil: 0x00C7,
Egrave: 0x00C8,
Eacute: 0x00C9,
Ecirc: 0x00CA,
Euml: 0x00CB,
Igrave: 0x00CC,
Iacute: 0x00CD,
Icirc: 0x00CE,
Iuml: 0x00CF,
ETH: 0x00D0,
Ntilde: 0x00D1,
Ograve: 0x00D2,
Oacute: 0x00D3,
Ocirc: 0x00D4,
Otilde: 0x00D5,
Ouml: 0x00D6,
times: 0x00D7,
Oslash: 0x00D8,
Ugrave: 0x00D9,
Uacute: 0x00DA,
Ucirc: 0x00DB,
Uuml: 0x00DC,
Yacute: 0x00DD,
THORN: 0x00DE,
szlig: 0x00DF,
agrave: 0x00E0,
aacute: 0x00E1,
acirc: 0x00E2,
atilde: 0x00E3,
auml: 0x00E4,
aring: 0x00E5,
aelig: 0x00E6,
ccedil: 0x00E7,
egrave: 0x00E8,
eacute: 0x00E9,
ecirc: 0x00EA,
euml: 0x00EB,
igrave: 0x00EC,
iacute: 0x00ED,
icirc: 0x00EE,
iuml: 0x00EF,
eth: 0x00F0,
ntilde: 0x00F1,
ograve: 0x00F2,
oacute: 0x00F3,
ocirc: 0x00F4,
otilde: 0x00F5,
ouml: 0x00F6,
divide: 0x00F7,
oslash: 0x00F8,
ugrave: 0x00F9,
uacute: 0x00FA,
ucirc: 0x00FB,
uuml: 0x00FC,
yacute: 0x00FD,
thorn: 0x00FE,
yuml: 0x00FF,
OElig: 0x0152,
oelig: 0x0153,
Scaron: 0x0160,
scaron: 0x0161,
Yuml: 0x0178,
fnof: 0x0192,
circ: 0x02C6,
tilde: 0x02DC,
Alpha: 0x0391,
Beta: 0x0392,
Gamma: 0x0393,
Delta: 0x0394,
Epsilon: 0x0395,
Zeta: 0x0396,
Eta: 0x0397,
Theta: 0x0398,
Iota: 0x0399,
Kappa: 0x039A,
Lambda: 0x039B,
Mu: 0x039C,
Nu: 0x039D,
Xi: 0x039E,
Omicron: 0x039F,
Pi: 0x03A0,
Rho: 0x03A1,
Sigma: 0x03A3,
Tau: 0x03A4,
Upsilon: 0x03A5,
Phi: 0x03A6,
Chi: 0x03A7,
Psi: 0x03A8,
Omega: 0x03A9,
alpha: 0x03B1,
beta: 0x03B2,
gamma: 0x03B3,
delta: 0x03B4,
epsilon: 0x03B5,
zeta: 0x03B6,
eta: 0x03B7,
theta: 0x03B8,
iota: 0x03B9,
kappa: 0x03BA,
lambda: 0x03BB,
mu: 0x03BC,
nu: 0x03BD,
xi: 0x03BE,
omicron: 0x03BF,
pi: 0x03C0,
rho: 0x03C1,
sigmaf: 0x03C2,
sigma: 0x03C3,
tau: 0x03C4,
upsilon: 0x03C5,
phi: 0x03C6,
chi: 0x03C7,
psi: 0x03C8,
omega: 0x03C9,
thetasym: 0x03D1,
upsih: 0x03D2,
piv: 0x03D6,
ensp: 0x2002,
emsp: 0x2003,
thinsp: 0x2009,
zwnj: 0x200C,
zwj: 0x200D,
lrm: 0x200E,
rlm: 0x200F,
ndash: 0x2013,
mdash: 0x2014,
lsquo: 0x2018,
rsquo: 0x2019,
sbquo: 0x201A,
ldquo: 0x201C,
rdquo: 0x201D,
bdquo: 0x201E,
dagger: 0x2020,
Dagger: 0x2021,
bull: 0x2022,
hellip: 0x2026,
permil: 0x2030,
prime: 0x2032,
Prime: 0x2033,
lsaquo: 0x2039,
rsaquo: 0x203A,
oline: 0x203E,
frasl: 0x2044,
euro: 0x20AC,
image: 0x2111,
weierp: 0x2118,
real: 0x211C,
trade: 0x2122,
alefsym: 0x2135,
larr: 0x2190,
uarr: 0x2191,
rarr: 0x2192,
darr: 0x2193,
harr: 0x2194,
crarr: 0x21B5,
lArr: 0x21D0,
uArr: 0x21D1,
rArr: 0x21D2,
dArr: 0x21D3,
hArr: 0x21D4,
forall: 0x2200,
part: 0x2202,
exist: 0x2203,
empty: 0x2205,
nabla: 0x2207,
isin: 0x2208,
notin: 0x2209,
ni: 0x220B,
prod: 0x220F,
sum: 0x2211,
minus: 0x2212,
lowast: 0x2217,
radic: 0x221A,
prop: 0x221D,
infin: 0x221E,
ang: 0x2220,
and: 0x2227,
or: 0x2228,
cap: 0x2229,
cup: 0x222A,
int: 0x222B,
there4: 0x2234,
sim: 0x223C,
cong: 0x2245,
asymp: 0x2248,
ne: 0x2260,
equiv: 0x2261,
le: 0x2264,
ge: 0x2265,
sub: 0x2282,
sup: 0x2283,
nsub: 0x2284,
sube: 0x2286,
supe: 0x2287,
oplus: 0x2295,
otimes: 0x2297,
perp: 0x22A5,
sdot: 0x22C5,
lceil: 0x2308,
rceil: 0x2309,
lfloor: 0x230A,
rfloor: 0x230B,
lang: 0x2329,
rang: 0x232A,
loz: 0x25CA,
spades: 0x2660,
clubs: 0x2663,
hearts: 0x2665,
diams: 0x2666
}));
}