aboutsummaryrefslogtreecommitdiff
path: root/js/step6_file.js
diff options
context:
space:
mode:
Diffstat (limited to 'js/step6_file.js')
-rw-r--r--js/step6_file.js96
1 files changed, 51 insertions, 45 deletions
diff --git a/js/step6_file.js b/js/step6_file.js
index 6a014eb..df216da 100644
--- a/js/step6_file.js
+++ b/js/step6_file.js
@@ -1,5 +1,8 @@
var types = require('./types');
var reader = require('./reader');
+var printer = require('./printer');
+var Env = require('./env').Env;
+var core = require('./core');
if (typeof module !== 'undefined') {
var readline = require('./node_readline');
}
@@ -11,15 +14,15 @@ function READ(str) {
// eval
function eval_ast(ast, env) {
- if (types.symbol_Q(ast)) {
+ if (types._symbol_Q(ast)) {
return env.get(ast);
- } else if (types.list_Q(ast)) {
+ } else if (types._list_Q(ast)) {
return ast.map(function(a) { return EVAL(a, env); });
- } else if (types.vector_Q(ast)) {
+ } else if (types._vector_Q(ast)) {
var v = ast.map(function(a) { return EVAL(a, env); });
v.__isvector__ = true;
return v;
- } else if (types.hash_map_Q(ast)) {
+ } else if (types._hash_map_Q(ast)) {
var new_hm = {};
for (k in ast) {
new_hm[EVAL(k, env)] = EVAL(ast[k], env);
@@ -32,45 +35,48 @@ function eval_ast(ast, env) {
function _EVAL(ast, env) {
while (true) {
- if (!types.list_Q(ast)) {
- return eval_ast(ast, env);
+
+ //console.log("EVAL:", types._pr_str(ast, true));
+ if (!types._list_Q(ast)) {
+ return eval_ast(ast, env);
+ }
+
+ // apply list
+ var a0 = ast[0], a1 = ast[1], a2 = ast[2], a3 = ast[3];
+ switch (a0.value) {
+ case "def!":
+ var res = EVAL(a2, env);
+ return env.set(a1, res);
+ case "let*":
+ var let_env = new Env(env);
+ for (var i=0; i < a1.length; i+=2) {
+ let_env.set(a1[i].value, EVAL(a1[i+1], let_env));
}
-
- // apply list
- var a0 = ast[0], a1 = ast[1], a2 = ast[2], a3 = ast[3];
- switch (a0.value) {
- case "def!":
- var res = EVAL(a2, env);
- return env.set(a1, res);
- case "let*":
- var let_env = new types.Env(env);
- for (var i=0; i < a1.length; i+=2) {
- let_env.set(a1[i].value, EVAL(a1[i+1], let_env));
- }
- return EVAL(a2, let_env);
- case "do":
- eval_ast(ast.slice(1, -1), env);
- ast = ast[ast.length-1];
- break;
- case "if":
- var cond = EVAL(a1, env);
- if (cond === null || cond === false) {
- ast = (typeof a3 !== "undefined") ? a3 : null;
- } else {
- ast = a2;
- }
- break;
- case "fn*":
- return types.new_function(EVAL, a2, env, a1);
- default:
- var el = eval_ast(ast, env), f = el[0], meta = f.__meta__;
- if (meta && meta.exp) {
- ast = meta.exp;
- env = new types.Env(meta.env, meta.params, el.slice(1));
- } else {
- return f.apply(f, el.slice(1));
- }
+ return EVAL(a2, let_env);
+ case "do":
+ eval_ast(ast.slice(1, -1), env);
+ ast = ast[ast.length-1];
+ break;
+ case "if":
+ var cond = EVAL(a1, env);
+ if (cond === null || cond === false) {
+ ast = (typeof a3 !== "undefined") ? a3 : null;
+ } else {
+ ast = a2;
}
+ break;
+ case "fn*":
+ return types._function(EVAL, Env, a2, env, a1);
+ default:
+ var el = eval_ast(ast, env), f = el[0], meta = f.__meta__;
+ if (meta && meta.exp) {
+ ast = meta.exp;
+ env = new Env(meta.env, meta.params, el.slice(1));
+ } else {
+ return f.apply(f, el.slice(1));
+ }
+ }
+
}
}
@@ -81,16 +87,16 @@ function EVAL(ast, env) {
// print
function PRINT(exp) {
- return types._pr_str(exp, true);
+ return printer._pr_str(exp, true);
}
// repl
-var repl_env = new types.Env();
+var repl_env = new Env();
var rep = function(str) { return PRINT(EVAL(READ(str), repl_env)); };
_ref = function (k,v) { repl_env.set(k, v); }
-// Import types functions
-for (var n in types.ns) { repl_env.set(n, types.ns[n]); }
+// Import core functions
+for (var n in core.ns) { repl_env.set(n, core.ns[n]); }
_ref('read-string', reader.read_str);
_ref('eval', function(ast) { return EVAL(ast, repl_env); });