Add match expression to Rust AST

4 files changed, 115 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 c3fa404..0630e07 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
@@ -351,6 +351,10 @@ public class RustWriter implements AutoCloseable {
                 this.writeIteratorLoopExpression(iteratorLoopExpression);
             }
 
+            case RustMatchExpression matchExpression -> {
+                this.writeMatchExpression(matchExpression);
+            }
+
             case RustPath path -> {
                 this.writePath(path);
             }
@@ -414,6 +418,7 @@ public class RustWriter implements AutoCloseable {
             case RustIfExpression _ -> RustPrecedence.PRIMARY;
             case RustIntegerLiteral _ -> RustPrecedence.PRIMARY;
             case RustIteratorLoopExpression _ -> RustPrecedence.PRIMARY;
+            case RustMatchExpression _ -> RustPrecedence.PRIMARY;
             case RustPath _ -> RustPrecedence.PATHS;
             case RustPrefixExpression _ -> RustPrecedence.PREFIX;
             case RustRangeExpr _ -> RustPrecedence.RANGE;
@@ -550,6 +555,27 @@ public class RustWriter implements AutoCloseable {
         this.writeBlockExpression(iteratorLoopExpression.body());
     }
 
+    private void writeMatchExpression(
+        RustMatchExpression matchExpression
+    ) throws IOException {
+        this.writer.write("match ");
+        this.writeTopLevelExpression(matchExpression.scrutinee());
+        this.writer.write(" {");
+        this.writer.indent();
+        this.writer.newLine();
+
+        for (var arm : matchExpression.arms()) {
+            this.writePattern(arm.pattern());
+            this.writer.write(" => ");
+            this.writeTopLevelExpression(arm.body());
+            this.writer.write(",");
+            this.writer.newLine();
+        }
+
+        this.writer.dedent();
+        this.writer.write("}");
+    }
+
     private void writePrefixExpression(RustPrefixExpression prefixExpression) throws IOException {
         this.writer.write(switch (prefixExpression.operator()) {
             case BORROW -> "&";
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustExpression.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustExpression.java
index 6cfea75..8e55bc4 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustExpression.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustExpression.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.RustExpression imports
 // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression imports
 
-public sealed interface RustExpression permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustArrayRepeatExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBinaryExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBlockExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBoolLiteral, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustCallExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustFieldExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIfExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIntegerLiteral, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIteratorLoopExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPath, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPrefixExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustRangeExpr, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTryPropagationExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustVecRepeatExpression {
+public sealed interface RustExpression permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustArrayRepeatExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBinaryExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBlockExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBoolLiteral, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustCallExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustFieldExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIfExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIntegerLiteral, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIteratorLoopExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPath, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPrefixExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustRangeExpr, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTryPropagationExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleExpression, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustVecRepeatExpression {
     public interface Builder {
         public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression build();
 
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMatchArm.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMatchArm.java
new file mode 100644
index 0000000..a946ce1
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMatchArm.java
@@ -0,0 +1,40 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm imports
+
+public record RustMatchArm(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPattern pattern, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression body) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifierPattern.arbitrary().build(), org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBlockExpression.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPattern pattern, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression body) {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm(pattern, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder withPattern(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPattern pattern) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder(pattern, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder withPattern(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPattern.Builder pattern) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder(pattern.build(), body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder withBody(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder(pattern, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder withBody(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression.Builder body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder(pattern, body.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMatchExpression.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMatchExpression.java
new file mode 100644
index 0000000..4770b86
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMatchExpression.java
@@ -0,0 +1,48 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression imports
+
+public record RustMatchExpression(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression scrutinee, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm> arms) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustBlockExpression.arbitrary().build(), java.util.List.of());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression scrutinee, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm> arms) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression(scrutinee, arms);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder withScrutinee(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression scrutinee) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder(scrutinee, arms);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder withScrutinee(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression.Builder scrutinee) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder(scrutinee.build(), arms);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder withArms(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm> arms) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder(scrutinee, arms);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder addArm(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm arm) {
+            var arms = new java.util.ArrayList<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm>(this.arms);
+            arms.add(arm);
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder(scrutinee, arms);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder addArm(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm.Builder arm) {
+            var arms = new java.util.ArrayList<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchArm>(this.arms);
+            arms.add(arm.build());
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder(scrutinee, arms);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMatchExpression body
+}