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