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try {
var Narcissus = require("narcissus/parse");
} catch(e) {
}
var util = require('util');
var PROMPT_NORMAL = "js> ",
PROMPT_INCOMPLETE = " > "
var buffer = "";
function readln(input) {
while (!(/\n/).test(buffer))
buffer += input.read(100).toString();
var lines = buffer.split("\n"),
line = lines.shift();
buffer = lines.join("\n");
return line
}
exports.repl = function() {
var buffer = "",
bufferedLines = [],
pendingLines = [];
system.stdout.write(PROMPT_NORMAL);
system.stdout.flush();
while (true) {
// TODO: replace with real readln
var line = system.stdin.readLine();
if (!line) {
system.stdout.write("\n");
system.stdout.flush();
break;
}
line = util.trimEnd(line);
var text = pendingLines.join("\n") + "\n" + line;
if (line == "" || !incomplete(text)) {
pendingLines = [];
try {
var result = system.evalGlobal(text);
var repr = util.repr(result);
if (repr.length > 76 || /\n/.test(repr))
repr = String(result);
if (!util.no(result)) {
system.stdout.write(repr + '\n');
system.stdout.flush();
global._ = result;
}
} catch (e) {
system.stdout.write(" exception from uncaught JavaScript throw: " + e + "\n");
}
} else
pendingLines.push(line);
if (pendingLines.length > 0)
system.stdout.write(PROMPT_INCOMPLETE);
else
system.stdout.write(PROMPT_NORMAL);
system.stdout.flush();
}
}
function incomplete(text) {
if (!Narcissus)
return false;
var incomp = true;
try {
var t = new Narcissus.Tokenizer(text);
var x = new Narcissus.CompilerContext(false);
var n = Narcissus.Script(t, x);
incomp = !t.done;
} catch (e) {
if (!t.done) {
print(e);
return false;
}
}
return incomp;
}
if (module.id == require.main)
exports.repl();
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