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gravlax

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gravlax - npm Package Compare versions

Comparing version

0.2.0
to
0.3.0

51

lib/parser.js

@@ -58,38 +58,2 @@ import { errorOnToken } from "./main.js";

const expression = () => equality();
const equality = () => {
let expr = comparison();
while (match("!=", "==")) {
const operator = previous();
const right = comparison();
expr = { kind: "binary", left: expr, operator, right };
}
return expr;
};
const comparison = () => {
let expr = term();
while (match(">", ">=", "<", "<=")) {
const operator = previous();
const right = term();
expr = { kind: "binary", left: expr, operator, right };
}
return expr;
};
const term = () => {
let expr = factor();
while (match("-", "+")) {
const operator = previous();
const right = factor();
expr = { kind: "binary", left: expr, operator, right };
}
return expr;
};
const factor = () => {
let expr = unary();
while (match("/", "*")) {
const operator = previous();
const right = unary();
expr = { kind: "binary", left: expr, operator, right };
}
return expr;
};
const unary = () => {

@@ -119,2 +83,17 @@ if (match("!", "-")) {

};
const parseBinaryOp = (ops, next) => {
return () => {
let expr = next();
while (match(...ops)) {
const operator = previous();
const right = next();
expr = { kind: "binary", left: expr, operator, right };
}
return expr;
};
};
const factor = parseBinaryOp(["/", "*"], unary);
const term = parseBinaryOp(["-", "+"], factor);
const comparison = parseBinaryOp([">", ">=", "<", "<="], term);
const equality = parseBinaryOp(["!=", "=="], comparison);
try {

@@ -121,0 +100,0 @@ return expression();

23

lib/scanner.js

@@ -26,5 +26,11 @@ import { error } from "./main.js";

}
#addToken(type, literal) {
const text = this.source.slice(this.start, this.current);
this.tokens.push({ lexeme: text, line: this.line, literal, type });
#addToken(type, literal, isCurrency) {
const lexeme = this.source.slice(this.start, this.current);
this.tokens.push({
lexeme,
line: this.line,
literal,
type,
...isCurrency && { isCurrency }
});
}

@@ -58,3 +64,4 @@ #advance() {

#number() {
while (isDigit(this.#peek())) {
const isCurrency = this.source[this.start] === "$";
while (isDigit(this.#peek()) || this.#peek() === ",") {
this.#advance();

@@ -68,6 +75,4 @@ }

}
this.#addToken(
"number",
Number(this.source.slice(this.start, this.current))
);
const numText = this.source.slice(this.start, this.current).replace(/[$,]/g, "");
this.#addToken("number", Number(numText), isCurrency);
}

@@ -127,3 +132,3 @@ #peek() {

default:
if (isDigit(c)) {
if (isDigit(c) || c === "$") {
this.#number();

@@ -130,0 +135,0 @@ } else if (isAlpha(c)) {

1

lib/token.d.ts
import { TokenType } from './token-type.js';
interface Token {
isCurrency?: boolean;
lexeme: string;

@@ -5,0 +6,0 @@ line: number;

2

lib/token.js
function tokenToString(token) {
return `'${token.lexeme}': ${token.type}` + (token.literal !== null ? `: ${token.literal}` : "");
return `'${token.lexeme}': ${token.type}` + (token.literal !== null ? `: ${token.isCurrency ? "$" : ""}${token.literal}` : "");
}

@@ -4,0 +4,0 @@ export {

2

package.json
{
"name": "gravlax",
"version": "0.2.0",
"version": "0.3.0",
"description": "A Lox interpreter with tasty TypeScript seasoning",

@@ -5,0 +5,0 @@ "repository": {

lib/parser.js.map

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lib/scanner.js.map

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lib/token.js.map

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