sjs/elisp.js
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Fixed REPL by adding EL.Parser.parseOne()

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Sami Samhuri 2009-12-06 00:23:20 -08:00
parent edbd48e969
commit 6fe9048c6e
1 changed files with 20 additions and 6 deletions
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26
el.js
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@ -113,6 +113,10 @@ EL.Parser.prototype.parse = function(string) {
return exprs; return exprs;
}; };
EL.Parser.prototype.parseOne = function(string) {
return this.parse(string)[0];
};
EL.Parser.prototype.parseUntil = function(regex, initial, next, consumeTerminator) { EL.Parser.prototype.parseUntil = function(regex, initial, next, consumeTerminator) {
var c, var c,
token = initial, token = initial,
@ -619,6 +623,11 @@ EL.isString = function(expr) {
return (EL.tag(expr) == 'string'); return (EL.tag(expr) == 'string');
}; };
EL.isList = function(expr) {
return (EL.tag(expr) == 'list');
};
EL.isCons = EL.isList;
EL.isFunction = function(expr) { EL.isFunction = function(expr) {
return (EL.tag(expr) == 'function'); return (EL.tag(expr) == 'function');
}; };
@ -644,8 +653,8 @@ EL.inferType = function(exprs) {
EL.isQuote = function(expr) { EL.isQuote = function(expr) {
var tag = EL.tag(expr), var tag = EL.tag(expr),
val = EL.val(expr), val = EL.val(expr),
car = EL.car(val), car = EL.isCons(val) && EL.car(val),
name = EL.symbolName(car); name = car && EL.symbolName(car);
return (tag == 'list' && name == 'quote'); return (tag == 'list' && name == 'quote');
}; };
@ -654,11 +663,15 @@ EL.eval = function(exprs) {
return e.evalExpressions(exprs); return e.evalExpressions(exprs);
}; };
EL.read = function(string) { EL.parse = function(string) {
var p = new EL.Parser(); var p = new EL.Parser();
return p.parse(string); return p.parse(string);
}; };
EL.parse = EL.read;
EL.parseOne = function(string) {
return EL.parse(string)[0];
};
EL.read = EL.parseOne;
EL.print = function(expr) { EL.print = function(expr) {
EL.Util.pp(expr); EL.Util.pp(expr);
@ -672,8 +685,9 @@ EL.repl = function() {
var p = new EL.Parser(), var p = new EL.Parser(),
e = new EL.Evaluator(); e = new EL.Evaluator();
while (true) { while (true) {
EL.print("elisp> "); print("elisp> ");
EL.print(e.eval(p.parse(readline()))); var x = readline();
EL.print(e.eval(p.parseOne(x)));
} }
}; };