// Generated by LiveScript 1.4.0
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(function(){
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var identifierRegex, tokenRegex;
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identifierRegex = /[\$\w]+/;
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function peek(tokens){
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var token;
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token = tokens[0];
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if (token == null) {
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throw new Error('Unexpected end of input.');
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}
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return token;
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}
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function consumeIdent(tokens){
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var token;
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token = peek(tokens);
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if (!identifierRegex.test(token)) {
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throw new Error("Expected text, got '" + token + "' instead.");
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}
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return tokens.shift();
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}
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function consumeOp(tokens, op){
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var token;
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token = peek(tokens);
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if (token !== op) {
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throw new Error("Expected '" + op + "', got '" + token + "' instead.");
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}
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return tokens.shift();
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}
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function maybeConsumeOp(tokens, op){
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var token;
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token = tokens[0];
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if (token === op) {
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return tokens.shift();
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} else {
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return null;
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}
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}
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function consumeArray(tokens){
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var types;
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consumeOp(tokens, '[');
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if (peek(tokens) === ']') {
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throw new Error("Must specify type of Array - eg. [Type], got [] instead.");
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}
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types = consumeTypes(tokens);
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consumeOp(tokens, ']');
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return {
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structure: 'array',
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of: types
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};
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}
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function consumeTuple(tokens){
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var components;
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components = [];
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consumeOp(tokens, '(');
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if (peek(tokens) === ')') {
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throw new Error("Tuple must be of at least length 1 - eg. (Type), got () instead.");
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}
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for (;;) {
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components.push(consumeTypes(tokens));
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maybeConsumeOp(tokens, ',');
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if (')' === peek(tokens)) {
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break;
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}
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}
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consumeOp(tokens, ')');
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return {
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structure: 'tuple',
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of: components
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};
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}
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function consumeFields(tokens){
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var fields, subset, ref$, key, types;
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fields = {};
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consumeOp(tokens, '{');
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subset = false;
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for (;;) {
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if (maybeConsumeOp(tokens, '...')) {
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subset = true;
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break;
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}
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ref$ = consumeField(tokens), key = ref$[0], types = ref$[1];
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fields[key] = types;
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maybeConsumeOp(tokens, ',');
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if ('}' === peek(tokens)) {
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break;
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}
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}
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consumeOp(tokens, '}');
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return {
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structure: 'fields',
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of: fields,
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subset: subset
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};
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}
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function consumeField(tokens){
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var key, types;
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key = consumeIdent(tokens);
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consumeOp(tokens, ':');
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types = consumeTypes(tokens);
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return [key, types];
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}
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function maybeConsumeStructure(tokens){
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switch (tokens[0]) {
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case '[':
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return consumeArray(tokens);
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case '(':
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return consumeTuple(tokens);
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case '{':
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return consumeFields(tokens);
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}
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}
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function consumeType(tokens){
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var token, wildcard, type, structure;
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token = peek(tokens);
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wildcard = token === '*';
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if (wildcard || identifierRegex.test(token)) {
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type = wildcard
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? consumeOp(tokens, '*')
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: consumeIdent(tokens);
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structure = maybeConsumeStructure(tokens);
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if (structure) {
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return structure.type = type, structure;
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} else {
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return {
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type: type
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};
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}
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} else {
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structure = maybeConsumeStructure(tokens);
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if (!structure) {
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throw new Error("Unexpected character: " + token);
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}
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return structure;
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}
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}
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function consumeTypes(tokens){
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var lookahead, types, typesSoFar, typeObj, type;
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if ('::' === peek(tokens)) {
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throw new Error("No comment before comment separator '::' found.");
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}
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lookahead = tokens[1];
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if (lookahead != null && lookahead === '::') {
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tokens.shift();
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tokens.shift();
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}
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types = [];
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typesSoFar = {};
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if ('Maybe' === peek(tokens)) {
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tokens.shift();
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types = [
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{
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type: 'Undefined'
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}, {
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type: 'Null'
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}
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];
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typesSoFar = {
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Undefined: true,
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Null: true
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};
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}
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for (;;) {
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typeObj = consumeType(tokens), type = typeObj.type;
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if (!typesSoFar[type]) {
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types.push(typeObj);
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}
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typesSoFar[type] = true;
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if (!maybeConsumeOp(tokens, '|')) {
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break;
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}
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}
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return types;
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}
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tokenRegex = RegExp('\\.\\.\\.|::|->|' + identifierRegex.source + '|\\S', 'g');
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module.exports = function(input){
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var tokens, e;
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if (!input.length) {
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throw new Error('No type specified.');
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}
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tokens = input.match(tokenRegex) || [];
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if (in$('->', tokens)) {
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throw new Error("Function types are not supported.\ To validate that something is a function, you may use 'Function'.");
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}
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try {
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return consumeTypes(tokens);
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} catch (e$) {
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e = e$;
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throw new Error(e.message + " - Remaining tokens: " + JSON.stringify(tokens) + " - Initial input: '" + input + "'");
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}
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};
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function in$(x, xs){
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var i = -1, l = xs.length >>> 0;
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while (++i < l) if (x === xs[i]) return true;
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return false;
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}
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}).call(this);
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