From 4bf4004fc90073d816d1431df5bc5845547b814e Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Fri, 4 Sep 2026 09:47:27 +0100
Subject: Add const declaration to TypeScript AST

---
 .../output/lang/typescript/TypescriptWriter.java   | 20 ++++++++
 .../typescript/ast/TypescriptConstDeclaration.java | 60 ++++++++++++++++++++++
 .../lang/typescript/ast/TypescriptStatement.java   |  2 +-
 3 files changed, 81 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptConstDeclaration.java

(limited to 'src/main/java')

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/TypescriptWriter.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/TypescriptWriter.java
index 7719474..7523fe0 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/TypescriptWriter.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/TypescriptWriter.java
@@ -72,6 +72,10 @@ public class TypescriptWriter implements AutoCloseable {
                 this.writeClassDeclaration(classDeclaration);
             }
 
+            case TypescriptConstDeclaration constDeclaration -> {
+                this.writeConstDeclaration(constDeclaration);
+            }
+
             case TypescriptExportNamesStatement exportNamesStatement -> {
                 this.writeExportNamesStatement(exportNamesStatement);
             }
@@ -119,6 +123,22 @@ public class TypescriptWriter implements AutoCloseable {
         this.writer.write("}");
     }
 
+    private void writeConstDeclaration(
+        TypescriptConstDeclaration constDeclaration
+    ) throws IOException {
+        this.writer.write("const ");
+        this.writeIdentifier(constDeclaration.name());
+
+        if (constDeclaration.type().isPresent()) {
+            this.writer.write(": ");
+            this.writeExpression(constDeclaration.type().get());
+        }
+
+        this.writer.write(" = ");
+        this.writeExpression(constDeclaration.value());
+        this.writer.write(";");
+    }
+
     private void writeExportNamesStatement(
         TypescriptExportNamesStatement exportNamesStatement
     ) throws IOException {
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptConstDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptConstDeclaration.java
new file mode 100644
index 0000000..ee34043
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptConstDeclaration.java
@@ -0,0 +1,60 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.typescript.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration imports
+
+public record TypescriptConstDeclaration(
+    org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptIdentifier name,
+    java.util.Optional<org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression> type,
+    org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression value
+) implements org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptStatement {
+    public static org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptIdentifier.arbitrary().build(), java.util.Optional.empty(), org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptNumberLiteral.arbitrary().build());
+    }
+
+    public record Builder(
+        org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptIdentifier name,
+        java.util.Optional<org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression> type,
+        org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression value
+    ) implements org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptStatement.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration(name, type, value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptIdentifier name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(name, type, value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptIdentifier.Builder name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(name.build(), type, value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder withType(java.util.Optional<org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression> type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(name, type, value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(name, java.util.Optional.of(type), value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression.Builder type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(name, java.util.Optional.of(type.build()), value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder withValue(org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression value) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(name, type, value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder withValue(org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpression.Builder value) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder(name, type, value.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptStatement.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptStatement.java
index 5d687c0..d16a160 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptStatement.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/typescript/ast/TypescriptStatement.java
@@ -5,7 +5,7 @@ package org.zwobble.hobgoblin.compiler.output.lang.typescript.ast;
 // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptStatement imports
 // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptStatement imports
 
-public sealed interface TypescriptStatement permits org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptClassDeclaration, org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExportNamesStatement, org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpressionStatement, org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptTypeAlias {
+public sealed interface TypescriptStatement permits org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptClassDeclaration, org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptConstDeclaration, org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExportNamesStatement, org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptExpressionStatement, org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptTypeAlias {
     public interface Builder {
         public org.zwobble.hobgoblin.compiler.output.lang.typescript.ast.TypescriptStatement build();
 
-- 
cgit v1.2.3