mirrors/rpncalc-v4
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bugifxes

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This commit is contained in:
Aidan K. Ewart 2020-05-30 23:49:46 +01:00
parent 1c6bee1947
commit 83e6cb247a
3 changed files with 23 additions and 9 deletions
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9
builtin.mjs
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@ -39,7 +39,7 @@ const root = (_, args) => {
}
const type = (_, args) => {
return [{type:"string", val:args[0].type}];
return [{type:"type", val:args[0].type}];
}
const pair = (_, args) => {
@ -84,11 +84,12 @@ addDefn("snd", ["pair"], snd);
addDefn("arr", ["int"], arr);
addDefn("!!", ["int", "array"], index);
addDefn("len", ["array"], len);
addRPNDefn("unit", "(-> 0 arr)");
addRPNDefn("mono", "(-> 1 arr)");
//addRPNDefn("unit", "(-> 0 arr)");
//addRPNDefn("mono", "(-> 1 arr)");
//addRPNDefn("unwrap", "(-> 0 !!)");
addRPNDefn("true", "(a b -> a)");
addRPNDefn("false", "(a b -> b)");
addRPNDefn("stop", "(-> \"stop)");
addRPNDefn("id", "(a -> a)");
//addRPNDefn("id", "(a -> a)");
addRPNDefn("inv", "(x -> 1 x /)");
addRPNDefn("fold", "(x acc fn -> '(-> acc) '(-> x acc fn 'fn fold) 'x \"stop ==)");

15
eval.mjs
View File

@ -93,7 +93,7 @@ const lookupScope = (name, scope) => {
if (n) {
return cloneElem(n);
} else {
throw "var " + n + " not in scope"
throw 'var "' + name + '" not in scope'
}
}
@ -154,11 +154,24 @@ const doStep = (ins, stack) => {
}
}
const showIns = (curr) => {
if (curr.type === "ident") {
return curr.val;
} else if (curr.type === "push") {
return "'" + showIns(curr.elem)
}
}
export const execRPN = (scope, i) => {
let ins = JSON.parse(JSON.stringify(i));
let stack = {scope:scope, stack:[]};
while (ins.length > 0) {
let curr = ins[0];
try {
doStep(ins, stack);
} catch (error) {
throw error + ' while executing "' + showIns(curr) + '"'
}
}
return stack;
}

6
parse.mjs
View File

@ -144,7 +144,7 @@ const parseName = (stream) => {
return {parsed:id.parsed.val, stream:syn.stream};
}
const parseString = (stream) => {
const parseType = (stream) => {
let syn = attempt(parseSyntax("\""))(stream);
if (syn.parsed === null) {
@ -154,7 +154,7 @@ const parseString = (stream) => {
if (id.parsed === null) {
return {parsed:null, stream:id.stream};
}
return {parsed:{type:"string", val:id.parsed.val}, stream:id.stream};
return {parsed:{type:"type", val:id.parsed.val}, stream:id.stream};
//return {parsed:null, stream:stream};
}
@ -193,7 +193,7 @@ const parseLambda = (stream) => {
}
/* takes in stream, outputs parsed item or null */
const parseExpr = or(parseString, or(parseIdent, or(parseInteger, or(parsePush, attempt(parens(parseLambda))))));
const parseExpr = or(parseType, or(parseIdent, or(parseInteger, or(parsePush, attempt(parens(parseLambda))))));
/* takes in stream, outputs parsed items */
export const parseExprs = many(parseExpr);