remove bootstrap
This commit is contained in:
parent
ab660ae7a8
commit
31d2f7336b
@ -1,5 +0,0 @@
|
||||
#!/bin/bash
|
||||
|
||||
set -xe
|
||||
|
||||
node phi.js compile.phi compile.phi stage1.js
|
@ -1,5 +0,0 @@
|
||||
#!/bin/bash
|
||||
|
||||
set -xe
|
||||
|
||||
node stage1.js compile.phi stage2.js
|
639
phi.js
639
phi.js
@ -1,639 +0,0 @@
|
||||
"use strict";
|
||||
|
||||
import fs from "node:fs";
|
||||
import process from "node:process";
|
||||
import { Runtime } from "./runtime.js";
|
||||
|
||||
function main() {
|
||||
const filename = process.argv[2];
|
||||
const text = fs.readFileSync(filename).toString();
|
||||
|
||||
const ast = new Parser(text).parse();
|
||||
|
||||
let lastValue = null;
|
||||
|
||||
const evaluator = new Evaluator(filename);
|
||||
for (const expr of ast) {
|
||||
const result = evaluator.eval(expr);
|
||||
if (result.type !== "value") {
|
||||
break;
|
||||
}
|
||||
lastValue = result.value;
|
||||
}
|
||||
if (lastValue !== null) {
|
||||
// console.log(Runtime.valueToJs(lastValue));
|
||||
}
|
||||
}
|
||||
|
||||
class Evaluator {
|
||||
constructor(filename) {
|
||||
this.syms = { parent: undefined, map: new Map(this.builtins) };
|
||||
this.currentLine = 0;
|
||||
this.filename = filename;
|
||||
this.runtime = new Runtime({ filename, args: process.argv.slice(3) });
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {Expr} expr
|
||||
*/
|
||||
eval(expr) {
|
||||
if (!expr) {
|
||||
this.runtime.printPanic(
|
||||
"expression could not be evaluated",
|
||||
this.currentLine,
|
||||
);
|
||||
throw new Error("expression could not be evaluated");
|
||||
}
|
||||
|
||||
this.currentLine = expr.line;
|
||||
this.runtime.setLine(expr.line);
|
||||
if (expr.type === "list") {
|
||||
return this.evalList(expr, expr.line);
|
||||
} else if (expr.type === "int") {
|
||||
return { type: "value", value: { type: "int", value: expr.value } };
|
||||
} else if (expr.type === "string") {
|
||||
return {
|
||||
type: "value",
|
||||
value: { type: "string", value: expr.value },
|
||||
};
|
||||
} else if (expr.type === "ident") {
|
||||
const sym = this.findSym(expr.value);
|
||||
if (!sym) {
|
||||
this.panic(
|
||||
`undefined symbol '${expr.value}'`,
|
||||
);
|
||||
}
|
||||
if (sym.type === "local") {
|
||||
return { type: "value", value: { ...sym.value } };
|
||||
} else {
|
||||
return { type: "value", value: { ...sym } };
|
||||
}
|
||||
} else {
|
||||
throw new Error(
|
||||
`unknown expr type '${expr.type}' on line ${expr.line}`,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
evalToValue(expr) {
|
||||
const result = this.eval(expr);
|
||||
if (result.type !== "value") {
|
||||
throw new Error(`expected value on line ${expr.line}`);
|
||||
}
|
||||
return result.value;
|
||||
}
|
||||
|
||||
evalList(expr) {
|
||||
const s = expr.values;
|
||||
const id = s[0]?.type === "ident" ? s[0].value : undefined;
|
||||
if (id === "fn") {
|
||||
return this.evalFn(expr);
|
||||
} else if (id === "return") {
|
||||
return {
|
||||
type: "return",
|
||||
value: s[1] ? this.evalToValue(s[1]) : { type: "null" },
|
||||
};
|
||||
} else if (id === "let") {
|
||||
return this.evalLet(expr);
|
||||
} else if (id === "if") {
|
||||
return this.evalIf(expr);
|
||||
} else if (id === "loop") {
|
||||
return this.evalLoop(expr);
|
||||
} else if (id === "for") {
|
||||
return this.evalFor(expr);
|
||||
} else if (id === "break") {
|
||||
return {
|
||||
type: "break",
|
||||
value: s[1] ? this.evalToValue(s[1]) : { type: "null" },
|
||||
};
|
||||
} else if (id === "do") {
|
||||
return this.evalDo(expr);
|
||||
} else if (id === "call") {
|
||||
return this.evalCall(expr);
|
||||
} else if (id === "not") {
|
||||
const value = this.evalToValue(s[1]);
|
||||
return {
|
||||
type: "value",
|
||||
value: { type: "bool", value: !value.value },
|
||||
};
|
||||
} else if (id === "or") {
|
||||
const left = this.evalToValue(s[1]);
|
||||
if (this.runtime.truthy(left)) {
|
||||
return { type: "value", value: { type: "bool", value: true } };
|
||||
} else {
|
||||
const right = this.evalToValue(s[2]);
|
||||
return {
|
||||
type: "value",
|
||||
value: { type: "bool", value: this.runtime.truthy(right) },
|
||||
};
|
||||
}
|
||||
} else if (id === "and") {
|
||||
const left = this.evalToValue(s[1]);
|
||||
if (this.runtime.truthy(left)) {
|
||||
const right = this.evalToValue(s[2]);
|
||||
return {
|
||||
type: "value",
|
||||
value: { type: "bool", value: this.runtime.truthy(right) },
|
||||
};
|
||||
} else {
|
||||
return { type: "value", value: { type: "bool", value: false } };
|
||||
}
|
||||
} else if (id in this.artithmeticOps) {
|
||||
const left = this.evalToValue(s[1]);
|
||||
const right = this.evalToValue(s[2]);
|
||||
return {
|
||||
type: "value",
|
||||
value: this.artithmeticOps[id](left, right),
|
||||
};
|
||||
} else if (id === "==") {
|
||||
const left = this.evalToValue(s[1]);
|
||||
const right = this.evalToValue(s[2]);
|
||||
return {
|
||||
type: "value",
|
||||
value: this.runtime.opEq(left, right),
|
||||
};
|
||||
} else if (id === "!=") {
|
||||
const left = this.evalToValue(s[1]);
|
||||
const right = this.evalToValue(s[2]);
|
||||
return {
|
||||
type: "value",
|
||||
value: this.runtime.opNe(left, right),
|
||||
};
|
||||
} else if (id in this.comparisonOps) {
|
||||
const left = this.evalToValue(s[1]);
|
||||
const right = this.evalToValue(s[2]);
|
||||
return {
|
||||
type: "value",
|
||||
value: this.runtime.comparisonOperation(
|
||||
left,
|
||||
right,
|
||||
this.comparisonOps[id],
|
||||
),
|
||||
};
|
||||
} else if (id in this.assignOps) {
|
||||
return this.evalAssign(expr);
|
||||
} else {
|
||||
return {
|
||||
type: "value",
|
||||
value: {
|
||||
type: "list",
|
||||
values: s.map((expr) => this.evalToValue(expr)),
|
||||
},
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
evalFn(expr) {
|
||||
const s = expr.values;
|
||||
const name = s[1].value;
|
||||
this.syms.map.set(name, {
|
||||
type: "fn",
|
||||
line: expr.line,
|
||||
name,
|
||||
params: s[2].values.map((ident) => ident.value),
|
||||
body: s[3],
|
||||
syms: this.syms,
|
||||
});
|
||||
return { type: "value", value: { type: "null" } };
|
||||
}
|
||||
|
||||
evalLet(expr) {
|
||||
const s = expr.values;
|
||||
const value = this.evalToValue(s[2]);
|
||||
this.assignPattern(s[1], value);
|
||||
return { type: "value", value: { type: "null" } };
|
||||
}
|
||||
|
||||
evalIf(expr) {
|
||||
const s = expr.values;
|
||||
const cond = this.evalToValue(s[1]);
|
||||
if (cond.type !== "bool") {
|
||||
throw new Error(
|
||||
`expected bool on line ${expr.line}`,
|
||||
);
|
||||
}
|
||||
if (cond.value) {
|
||||
return this.eval(s[2]);
|
||||
} else if (s[3]) {
|
||||
return this.eval(s[3]);
|
||||
} else {
|
||||
return { type: "value", value: "null" };
|
||||
}
|
||||
}
|
||||
|
||||
evalLoop(expr) {
|
||||
const s = expr.values;
|
||||
while (true) {
|
||||
const result = this.eval(s[1]);
|
||||
if (result.type === "break") {
|
||||
return { type: "value", value: result.value };
|
||||
} else if (result.type !== "value") {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
evalFor(expr) {
|
||||
const s = expr.values;
|
||||
|
||||
const value = this.evalToValue(s[2]);
|
||||
if (value.type !== "list") {
|
||||
throw new Error(
|
||||
`expected list on line ${expr.line}`,
|
||||
);
|
||||
}
|
||||
|
||||
for (let i = 0; i < value.values.length; ++i) {
|
||||
this.enterScope();
|
||||
this.assignPattern(s[1], value.values[i]);
|
||||
this.enterScope();
|
||||
|
||||
const result = this.eval(s[3]);
|
||||
|
||||
this.leaveScope();
|
||||
this.leaveScope();
|
||||
|
||||
if (result.type === "break") {
|
||||
return { type: "value", value: result.value };
|
||||
} else if (result.type !== "value") {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
return { type: "value", value: { type: "null" } };
|
||||
}
|
||||
|
||||
evalDo(expr) {
|
||||
const s = expr.values;
|
||||
this.enterScope();
|
||||
|
||||
let lastValue = { type: "null" };
|
||||
|
||||
for (const expr of s.slice(1)) {
|
||||
const result = this.eval(expr);
|
||||
if (!result) {
|
||||
console.log({ expr, result });
|
||||
}
|
||||
if (result.type !== "value") {
|
||||
return result;
|
||||
}
|
||||
lastValue = result.value;
|
||||
}
|
||||
|
||||
this.leaveScope();
|
||||
return { type: "value", value: lastValue };
|
||||
}
|
||||
|
||||
evalCall(expr) {
|
||||
const s = expr.values;
|
||||
const args = s.slice(2).map((arg) => this.evalToValue(arg));
|
||||
const fnValue = this.evalToValue(s[1]);
|
||||
|
||||
if (fnValue.type === "builtin") {
|
||||
return { type: "value", value: fnValue.fn(...args) };
|
||||
} else if (fnValue.type !== "fn") {
|
||||
throw new Error("cannot call non-function");
|
||||
}
|
||||
|
||||
this.runtime.pushCall(fnValue.name, expr.line);
|
||||
const callerSyms = this.syms;
|
||||
this.syms = {
|
||||
parent: fnValue.syms,
|
||||
map: new Map(),
|
||||
};
|
||||
if (fnValue.params.length !== args.length) {
|
||||
this.panic(
|
||||
`incorrect amount of arguments for function '${fnValue.name}'`,
|
||||
);
|
||||
}
|
||||
for (let i = 0; i < fnValue.params.length; ++i) {
|
||||
this.syms.map.set(fnValue.params[i], args[i]);
|
||||
}
|
||||
|
||||
this.enterScope();
|
||||
let returnValue = { type: "null" };
|
||||
const result = this.eval(fnValue.body);
|
||||
this.leaveScope();
|
||||
|
||||
if (result.type === "value" || result.type === "return") {
|
||||
returnValue = result.value;
|
||||
} else {
|
||||
throw new Error(`illegal ${result.type} across boundry`);
|
||||
}
|
||||
|
||||
this.syms = callerSyms;
|
||||
this.runtime.popCall();
|
||||
return { type: "value", value: returnValue };
|
||||
}
|
||||
|
||||
evalAssign(expr) {
|
||||
const s = expr.values;
|
||||
const id = s[0].value;
|
||||
if (s[1].type === "ident") {
|
||||
const sym = this.findSym(s[1].value);
|
||||
if (!sym) {
|
||||
throw new Error(
|
||||
`could not find symbol '${expr.value}' on line ${expr.line}`,
|
||||
);
|
||||
}
|
||||
const value = this.evalToValue(s[2]);
|
||||
if (sym.type === "local") {
|
||||
sym.value = this.assignOps[id](sym.value, value);
|
||||
} else {
|
||||
throw new Error(
|
||||
`cannot assign to symbol on line ${expr.line}`,
|
||||
);
|
||||
}
|
||||
} else {
|
||||
throw new Error(
|
||||
`cannot assign to expression on line ${expr.line}`,
|
||||
);
|
||||
}
|
||||
return { type: "value", value: { type: "null" } };
|
||||
}
|
||||
|
||||
/** @param {Expr} pattern */
|
||||
assignPattern(pattern, value) {
|
||||
if (pattern.type === "ident") {
|
||||
if (pattern.value === "_") {
|
||||
return;
|
||||
}
|
||||
if (this.syms.map.has(pattern.value)) {
|
||||
throw new Error(
|
||||
`redeclaration of local symbol '${pattern.value}' on line ${pattern.line}`,
|
||||
);
|
||||
}
|
||||
this.syms.map.set(pattern.value, {
|
||||
type: "local",
|
||||
line: pattern.line,
|
||||
value,
|
||||
});
|
||||
} else if (pattern.type === "list") {
|
||||
if (value.type !== "list") {
|
||||
this.panic(`expected list on line ${pattern.line}`);
|
||||
}
|
||||
for (const [i, p] of pattern.values.entries()) {
|
||||
this.assignPattern(p, value.values[i] ?? { type: "null" });
|
||||
}
|
||||
} else {
|
||||
throw new Error(`cannot assign to pattern on line ${pattern.line}`);
|
||||
}
|
||||
}
|
||||
|
||||
findSym(ident, syms = this.syms) {
|
||||
if (syms.map.has(ident)) {
|
||||
return syms.map.get(ident);
|
||||
} else if (syms.parent) {
|
||||
return this.findSym(ident, syms.parent);
|
||||
} else {
|
||||
return undefined;
|
||||
}
|
||||
}
|
||||
|
||||
panic(msg) {
|
||||
this.runtime.setLine(this.currentLine);
|
||||
this.runtime.panic(msg);
|
||||
}
|
||||
|
||||
enterScope() {
|
||||
this.syms = { parent: this.syms, map: new Map() };
|
||||
}
|
||||
|
||||
leaveScope() {
|
||||
this.syms = this.syms.parent;
|
||||
}
|
||||
|
||||
artithmeticOps = {
|
||||
"+": (left, right) => this.runtime.opAdd(left, right),
|
||||
"-": (left, right) => this.runtime.opSub(left, right),
|
||||
};
|
||||
comparisonOps = {
|
||||
"<": (left, right) => left < right,
|
||||
">": (left, right) => left > right,
|
||||
"<=": (left, right) => left <= right,
|
||||
">=": (left, right) => left >= right,
|
||||
};
|
||||
assignOps = {
|
||||
"=": (_, right) => right,
|
||||
"+=": (left, right) => ({
|
||||
type: left.type === "string" && left.type === right.type
|
||||
? "string"
|
||||
: "int",
|
||||
value: left.value + right.value,
|
||||
}),
|
||||
"-=": (left, right) => ({
|
||||
type: "int",
|
||||
value: left.value - right.value,
|
||||
}),
|
||||
};
|
||||
|
||||
builtinFns = {
|
||||
"format": (...args) => this.runtime.builtinFormat(...args),
|
||||
"print": (...args) => this.runtime.builtinPrint(...args),
|
||||
"println": (...args) => this.runtime.builtinPrintln(...args),
|
||||
"panic": (...args) => this.runtime.builtinPanic(...args),
|
||||
"read_text_file": (...args) =>
|
||||
this.runtime.builtinReadTextFile(...args),
|
||||
"write_text_file": (...args) =>
|
||||
this.runtime.builtinWriteTextFile(...args),
|
||||
"push": (...args) => this.runtime.builtinPush(...args),
|
||||
"at": (...args) => this.runtime.builtinAt(...args),
|
||||
"set": (...args) => this.runtime.builtinSet(...args),
|
||||
"len": (...args) => this.runtime.builtinLen(...args),
|
||||
"string_to_int": (...args) => this.runtime.builtinStringToInt(...args),
|
||||
"char_code": (...args) => this.runtime.builtinCharCode(...args),
|
||||
"strings_join": (...args) => this.runtime.builtinStringsJoin(...args),
|
||||
"get_args": (...args) => this.runtime.builtinGetArgs(...args),
|
||||
};
|
||||
|
||||
consts = {
|
||||
"null": { type: "null" },
|
||||
"false": { type: "bool", value: false },
|
||||
"true": { type: "bool", value: true },
|
||||
"is_phi_compiler": { type: "bool", value: false },
|
||||
};
|
||||
|
||||
builtins = [
|
||||
...Object.entries(this.builtinFns)
|
||||
.map(([key, fn]) => [key, { type: "builtin", fn }]),
|
||||
...Object.entries(this.consts),
|
||||
];
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {Expr} expr
|
||||
* @returns {string}
|
||||
*/
|
||||
function exprToString(expr) {
|
||||
if (expr.type === "ident") {
|
||||
return expr.value;
|
||||
} else if (expr.type === "int") {
|
||||
return `${expr.value}`;
|
||||
} else if (expr.type === "string") {
|
||||
return `"${expr.value}"`;
|
||||
} else if (expr.type === "list") {
|
||||
return `(${expr.values.map((v) => exprToString(v)).join(" ")})`;
|
||||
} else {
|
||||
throw new Error(`unknown value type ${expr.type}`);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @typedef {{ type: string, line: number, value: any, values?: Expr } } Expr
|
||||
*/
|
||||
|
||||
class Parser {
|
||||
constructor(text) {
|
||||
const stringExtractor = new StringExtractor(text);
|
||||
stringExtractor.extract();
|
||||
this.strings = stringExtractor.getStrings();
|
||||
this.text = stringExtractor.getOutputText();
|
||||
this.tokens = this.text
|
||||
.replace(/\/\/.*?$/mg, "")
|
||||
.replace(/([\(\)\n])/g, " $1 ")
|
||||
.split(/[ \t\r]/)
|
||||
.filter((tok) => tok !== "");
|
||||
this.idx = 0;
|
||||
this.line = 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* @returns {Expr[]}
|
||||
*/
|
||||
parse() {
|
||||
if (this.curr === "\n") {
|
||||
this.step();
|
||||
}
|
||||
|
||||
const exprs = [];
|
||||
while (!this.done) {
|
||||
exprs.push(this.parseExpr());
|
||||
}
|
||||
return exprs;
|
||||
}
|
||||
|
||||
parseExpr() {
|
||||
const line = this.line;
|
||||
if (this.eat("(")) {
|
||||
const values = [];
|
||||
while (!this.test(")")) {
|
||||
values.push(this.parseExpr());
|
||||
}
|
||||
if (!this.test(")")) {
|
||||
throw new Error(`expected ')'`);
|
||||
}
|
||||
this.step();
|
||||
return { type: "list", line, values };
|
||||
} else if (this.test(/STRING_\d+/)) {
|
||||
const id = Number(this.curr.match(/STRING_(\d+)/)[1]);
|
||||
this.step();
|
||||
return { type: "string", line, value: this.strings[id] };
|
||||
} else if (this.test(/0|(:?[1-9][0-9]*)/)) {
|
||||
const value = Number(this.curr);
|
||||
this.step();
|
||||
return { type: "int", line, value };
|
||||
} else if (this.test(/[a-zA-Z0-9\+\-\*/%&\|=\?\!<>'_]+/)) {
|
||||
const value = this.curr;
|
||||
this.step();
|
||||
return { type: "ident", line, value };
|
||||
} else {
|
||||
throw new Error(
|
||||
`expected expression, got ${this.curr} on line ${this.line}`,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
eat(tok) {
|
||||
if (!this.test(tok)) {
|
||||
return false;
|
||||
}
|
||||
this.step();
|
||||
return true;
|
||||
}
|
||||
test(tok) {
|
||||
if (this.done) {
|
||||
return false;
|
||||
}
|
||||
if (typeof tok === "string") {
|
||||
return this.curr === tok;
|
||||
} else if (tok instanceof RegExp) {
|
||||
return new RegExp(`^${tok.source}$`)
|
||||
.test(this.curr);
|
||||
} else {
|
||||
throw new Error();
|
||||
}
|
||||
}
|
||||
step() {
|
||||
do {
|
||||
if (!this.done && this.curr === "\n") {
|
||||
this.line += 1;
|
||||
}
|
||||
this.idx += 1;
|
||||
} while (!this.done && this.curr === "\n");
|
||||
}
|
||||
|
||||
get done() {
|
||||
return this.idx >= this.tokens.length;
|
||||
}
|
||||
get curr() {
|
||||
return this.tokens[this.idx];
|
||||
}
|
||||
}
|
||||
|
||||
class StringExtractor {
|
||||
constructor(text) {
|
||||
this.text = text;
|
||||
this.idx = 0;
|
||||
this.outputText = "";
|
||||
this.strings = [];
|
||||
}
|
||||
|
||||
extract() {
|
||||
while (this.idx < this.text.length) {
|
||||
if (this.text[this.idx] == '"') {
|
||||
this.extractString();
|
||||
} else {
|
||||
this.outputText += this.text[this.idx];
|
||||
this.idx += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
extractString() {
|
||||
this.idx += 1;
|
||||
let value = "";
|
||||
while (this.idx < this.text.length && this.text[this.idx] != '"') {
|
||||
if (this.text[this.idx] == "\\") {
|
||||
this.idx += 1;
|
||||
if (this.idx > this.text.length) {
|
||||
break;
|
||||
}
|
||||
const ch = this.text[this.idx];
|
||||
value += {
|
||||
"0": "\0",
|
||||
"t": "\t",
|
||||
"r": "\r",
|
||||
"n": "\n",
|
||||
}[ch] ?? ch;
|
||||
} else {
|
||||
value += this.text[this.idx];
|
||||
}
|
||||
this.idx += 1;
|
||||
}
|
||||
if (this.idx >= this.text.length || this.text[this.idx] != '"') {
|
||||
throw new Error("expected '\"'");
|
||||
}
|
||||
this.idx += 1;
|
||||
const id = this.strings.length;
|
||||
this.strings.push(value);
|
||||
this.outputText += `STRING_${id}`;
|
||||
}
|
||||
|
||||
getStrings() {
|
||||
return this.strings;
|
||||
}
|
||||
getOutputText() {
|
||||
return this.outputText;
|
||||
}
|
||||
}
|
||||
|
||||
main();
|
Loading…
x
Reference in New Issue
Block a user