initial

.gitignore

@@ -0,0 +1,175 @@
+# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+
+logs
+_.log
+npm-debug.log_
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Caches
+
+.cache
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# Runtime data
+
+pids
+_.pid
+_.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+lib-cov
+
+# Coverage directory used by tools like istanbul
+
+coverage
+*.lcov
+
+# nyc test coverage
+
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+
+bower_components
+
+# node-waf configuration
+
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+build/Release
+
+# Dependency directories
+
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+web_modules/
+
+# TypeScript cache
+
+*.tsbuildinfo
+
+# Optional npm cache directory
+
+.npm
+
+# Optional eslint cache
+
+.eslintcache
+
+# Optional stylelint cache
+
+.stylelintcache
+
+# Microbundle cache
+
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+
+.node_repl_history
+
+# Output of 'npm pack'
+
+*.tgz
+
+# Yarn Integrity file
+
+.yarn-integrity
+
+# dotenv environment variable files
+
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+
+.parcel-cache
+
+# Next.js build output
+
+.next
+out
+
+# Nuxt.js build / generate output
+
+.nuxt
+dist
+
+# Gatsby files
+
+# Comment in the public line in if your project uses Gatsby and not Next.js
+
+# https://nextjs.org/blog/next-9-1#public-directory-support
+
+# public
+
+# vuepress build output
+
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+
+.temp
+
+# Docusaurus cache and generated files
+
+.docusaurus
+
+# Serverless directories
+
+.serverless/
+
+# FuseBox cache
+
+.fusebox/
+
+# DynamoDB Local files
+
+.dynamodb/
+
+# TernJS port file
+
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store

README.md

@@ -0,0 +1,15 @@
+# ciad
+
+To install dependencies:
+
+```bash
+bun install
+```
+
+To run:
+
+```bash
+bun run main.ts
+```
+
+This project was created using `bun init` in bun v1.1.20. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.

examples/basic.ciad

@@ -0,0 +1,6 @@
+fn main:
+  let x = 1
+  if x > 1:
+  print("hello, world")
+
+fn other:

main.ts

@@ -0,0 +1,137 @@
+// Parsing combinators
+const ok = <T>(r: T, e: string): Result<T> => ({ status: "ok", value: r, remain: e });
+const err = <T, E>(m: string, e?: E): Result<T> => ({ status: "err", msg: m, data: e });
+const wrapErr = <T>(e: string, r: Result<T>): Result<T> => r.status === "ok" ? r : { ...r, msg: `${e}: ${r.msg}`}
+
+type Result<T> = {status:"ok",value:T, remain:string} | {status:"err", msg: string, data?: unknown}
+type Parser<T = unknown> = (i: string) => Result<T>;
+
+const re = (r: RegExp): Parser<string> => (i: string) => {
+    const r2 = r.source.startsWith("^") ? r : new RegExp(`^${r.source}`)
+    const m = r2.exec(i);
+    if (!m) return err("failed to match " + r.source)
+    return ok(m[0], i.slice(m[0].length))
+};
+const map = <T, U>(p: Parser<T>, f: (_: T) => U): Parser<U> => (i: string) => {
+    const res = p(i);
+    if (res.status === "ok") return {...res, value: f(res.value)}
+    else return res;
+};
+const opt = <T>(p: Parser<T>): Parser<T|null> => (i: string) => p(i).status === "ok" ? p(i) : ok(null,i);
+const seq = (...parsers) => (i: string) => parsers.reduce((acc: Result<unknown[]>, next: Parser, idx) => {
+    if (acc.status === "err") return acc;
+    const res = next(acc.remain);
+    if (res.status === "err") return wrapErr(`failed seq #${idx}`, res);
+    return ok([...acc.value, res.value], res.remain)
+}, ok([], i));
+const alt = (...parsers) => (i: string) => {
+    const res = parsers.reduce((acc: Result<unknown>, next: Parser) => {
+        if (acc.status === "ok") return acc;
+        return next(i)
+    }, err("nothing matched"));
+    if (res.status === "err") return err("failed alt")
+    return res;
+};
+
+const _: Parser = re(/\s*/) // whitespace
+
+// Grammar
+const ident: Parser = re(/(\_[A-Za-z0-9_]+)|([A-Za-z][A-Za-z0-9_]*)/);
+const ty: Parser = alt(
+    re(/uint/), re(/int/), re(/ptr/),
+    re(/str/), ident,
+)
+
+const exprL: Parser = alt(
+    seq(re(/\(/), _, (i) => expr(i), _, re(/\)/)),
+    map(re(/(\+|\-)?[0-9]+/), (n) => ({expr:"intLit", value:parseInt(n)})),
+    map(ident, (name) => ({expr:"ident", name})),
+)
+const expr2: Parser = alt(
+    map(seq(exprL, _, re(/</), _, exprL), ([left,,,,right]) => ({expr:"<", left, right})),
+    map(seq(exprL, _, re(/>/), _, exprL), ([left,,,,right]) => ({expr:">", left, right})),
+    exprL)
+const expr1: Parser = alt(
+    map(seq(expr2, _, re(/==/), _, expr2), ([left,,,,right]) => ({expr: "==", left, right})),
+    expr2)
+const expr: Parser = expr1
+
+const top: Parser = alt(
+    map(seq(re(/extern/), _, ident), (([, name]) => ({type: "extern", name}))),
+    seq(re(/struct/), _, ident, _, re(/:/)),
+    map(seq(re(/fn/), _, ident, _, re(/:/)), (([,, name]) => ({type: "func", name}))),
+)
+const stmt: Parser = alt(
+    map(seq(re(/let/), _, ident, _, re(/=/), _, (i) => expr(i)),
+        ([,, name,,,, value]) => ({stmt: "let",name, value})),
+    map(seq(re(/if/), _, (i) => expr(i), _, re(/:/)), ([,, cond]) => ({stmt: "if", cond})),
+    map((i) => expr(i), (expr) => ({stmt:"expr", expr})),
+)
+
+
+// Parsing driver
+interface Program {
+    structs: object[]
+    functions: object[]
+}
+
+function parseProgram(input: string): Program {
+    let currentFunc: string | null = null;
+    let indentStack = [0];
+    let expectIndent = false;
+
+    for (const line of input.split(/\r?\n/)) {
+        const leadingWhitespace = /^(?<space>\s*)(?<rest>.*)$/.exec(line)
+        const numSpaces = leadingWhitespace?.groups?.space?.length ?? 0;
+        const rest = leadingWhitespace?.groups?.rest ?? "";
+
+        console.log("stack", indentStack)
+
+        const lastIndent = indentStack[indentStack.length - 1];
+        if (numSpaces > lastIndent) {
+            if (expectIndent) {
+                indentStack.push(numSpaces)
+                expectIndent = false;
+            } else {
+                // Possible error?
+            }
+        } else if (numSpaces === lastIndent) {
+            if (expectIndent) {
+                console.log("empty block")
+            }
+        } else {
+            indentStack.pop();
+            console.log("dedented")
+        }
+
+        if (numSpaces === 0) {
+            // Parse top level
+            const result = opt(top)(rest)
+            console.log("top", JSON.stringify(result))
+            if (result.status === "ok") {
+                if (result.value === null) continue;
+                switch(result.value.type) {
+                    case "func":
+                        currentFunc = result.value.name;
+                        expectIndent = true;
+                        break;
+                }
+            }
+        } else if (currentFunc) {
+            const result = stmt(rest);
+            console.log("stmt", JSON.stringify(rest), JSON.stringify(result))
+        }
+    }
+}
+
+// Codegen
+
+// Main
+async function main() {
+    const filename = Bun.argv[2];
+    const contents = await Bun.file(filename).text()
+
+    const programAst = parseProgram(contents);
+}
+
+main();

package.json

@@ -0,0 +1,11 @@
+{
+  "name": "ciad",
+  "module": "main.ts",
+  "type": "module",
+  "devDependencies": {
+    "@types/bun": "latest"
+  },
+  "peerDependencies": {
+    "typescript": "^5.0.0"
+  }
+}

tsconfig.json

@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    // Enable latest features
+    "lib": ["ESNext", "DOM"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}