First commit for CG

src/ast.ts

@@ -0,0 +1,34 @@
+import type { Value } from './types';
+
+export type Literal = {
+    kind: 'literal'
+    value: Value
+}
+
+export type BinaryOp = {
+    kind: 'binaryop'
+    operator: string
+    left: AST
+    right: AST
+}
+
+export type Variable = {
+    kind: 'variable'
+    name: string
+}
+
+export type Let = {
+    kind: 'let'
+    name: string
+    value: AST
+    body: AST
+}
+
+export type If = {
+    kind: 'if'
+    condition: AST
+    then: AST
+    else: AST
+}
+
+export type AST = Literal | BinaryOp | Variable | Let | If