parser stuff

example-no-types.slg

@@ -0,0 +1,30 @@
+
+
+fn add(a, b) {
+    + a b
+}
+// 
+// add(2,3); // -> 5
+// 
+// let a = "Hello";
+// 
+// let b = "world";
+// 
+// println(a + " " + b + "!"); // -> "Hello world!"
+// 
+// if a == b {
+//     println("whaaaat");
+// }
+// else {
+//     println(":o");
+// }
+// 
+// loop {
+//     let i = 0;
+// 
+//     if i >= 10 {
+//         break;
+//     }
+// 
+//     i = i + 1;
+// }

src/Lexer.ts

@@ -109,7 +109,7 @@ export class Lexer {
             if (this.test("/")) {
                 while (!this.done() && !this.test("\n"))
                     this.step();
-                return this.token("//", pos)
+                return this.next()
             }
             return this.token("/", pos)
         }

src/Parser.ts

@@ -2,7 +2,7 @@ import { Expr, ExprKind, Param, Stmt, StmtKind, BinaryType} from "./ast.ts";
 import { Lexer } from "./Lexer.ts";
 import { Pos, Token } from "./Token.ts";
 
-class Parser {
+export class Parser {
     private currentToken: Token | null;
     private nextNodeId = 0;
 
@@ -11,7 +11,7 @@ class Parser {
     }
 
     private step() { this.currentToken = this.lexer.next() }
-    private done(): boolean { return this.currentToken == null; }
+    public done(): boolean { return this.currentToken == null; }
     private current(): Token { return this.currentToken!; }
     private pos(): Pos {
         if (this.done())

src/main.ts

@@ -1,13 +1,13 @@
 import { Lexer } from "./Lexer.ts";
 import { readFileSync } from 'node:fs';
+import { Parser } from "./Parser.ts";
 
 
-const text = readFileSync("example.slg").toString()
+const text = readFileSync("example-no-types.slg").toString()
 
 const lexer = new Lexer(text);
-let token = lexer.next();
+const parser = new Parser(lexer)
-while (token !== null) {
+while (!parser.done()) {
-    const value = token.identValue ?? token.intValue ?? token.stringValue ?? "";
+    const result = parser.parseExpr()
-    console.log(`${token.type}\t${value}`)
+    console.log(result)
-    token = lexer.next();
 }