Add basic type aliases to Rust AST

5 files changed, 120 insertions, 1 deletions

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java
index a101528..858dfb3 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java
@@ -86,6 +86,10 @@ public class RustWriter implements AutoCloseable {
             case RustTraitImpl traitImpl -> {
                 writeTraitImpl(traitImpl);
             }
+
+            case RustTypeAlias typeAlias -> {
+                writeTypeAlias(typeAlias);
+            }
         }
     }
 
@@ -256,6 +260,14 @@ public class RustWriter implements AutoCloseable {
         this.writer.write("}");
     }
 
+    private void writeTypeAlias(RustTypeAlias typeAlias) throws IOException {
+        this.writer.write("type ");
+        this.writeIdentifier(typeAlias.name());
+        this.writer.write(" = ");
+        this.writeType(typeAlias.type());
+        this.writer.write(";");
+    }
+
     // === Associated items ===
 
     void writeAssociatedItem(RustAssociatedItem item) throws IOException {
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java
index 9ade576..73cacb8 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java
@@ -5,7 +5,7 @@ package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
 // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem imports
 // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem imports
 
-public sealed interface RustItem permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustFunction, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustInherentImpl, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTraitImpl {
+public sealed interface RustItem permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustFunction, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustInherentImpl, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTraitImpl, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias {
     public interface Builder {
         public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem build();
 
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeAlias.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeAlias.java
new file mode 100644
index 0000000..e58eb51
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeAlias.java
@@ -0,0 +1,46 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias imports
+
+public record RustTypeAlias(
+    org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name,
+    org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType type
+) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier.arbitrary().build(), org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustImplTraitType.arbitrary().build());
+    }
+
+    public record Builder(
+        org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name,
+        org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType type
+    ) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias(name, type);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder(name, type);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier.Builder name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder(name.build(), type);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder(name, type);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType.Builder type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder(name, type.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias body
+}
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
index 0bf96e4..f06b4a1 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
@@ -107,6 +107,20 @@ public class RustWriterTests {
             }"""));
     }
 
+    // === Type aliases ===
+
+    @Test
+    public void basicTypeAlias() throws IOException {
+        var rust = RustTypeAlias.arbitrary()
+            .withName(RustIdentifier.of("X"))
+            .withType(RustPath.of("Y"))
+            .build();
+
+        var string = write(writer -> writer.writeItem(rust));
+
+        assertThat(string, equalTo("type X = Y;"));
+    }
+
     // === Structs ===
 
     @Test
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeAliasMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeAliasMatcher.java
new file mode 100644
index 0000000..8cabb97
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeAliasMatcher.java
@@ -0,0 +1,47 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher imports
+
+public final class RustTypeAliasMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher isRustTypeAlias() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias>> submatchers;
+
+    private RustTypeAliasMatcher(
+        java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias>> submatchers
+    ) {
+        this.submatchers = submatchers;
+    }
+
+    public org.zwobble.precisely.MatchResult match(java.lang.Object actual) {
+        return this.toMatcher().match(actual);
+    }
+
+    public org.zwobble.precisely.TextTree describe() {
+        return this.toMatcher().describe();
+    }
+
+    private org.zwobble.precisely.Matcher<java.lang.Object> toMatcher() {
+        return org.zwobble.precisely.Matchers.instanceOf(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher withName(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier> name) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("name", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias::name, name));
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher(submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher withType(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType> type) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("type", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAlias::type, type));
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher(submatchers);
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeAliasMatcher body
+}