Support parsing namespace name

2 files changed, 46 insertions, 2 deletions

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/parser/Parser.java b/src/main/java/org/zwobble/hobgoblin/compiler/parser/Parser.java
index f995ef3..05c429d 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/parser/Parser.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/parser/Parser.java
@@ -228,17 +228,39 @@ public class Parser {
     private static UntypedTypeLevelReferenceNode parsePrimaryTypeLevelExpression(TokenIterator tokens) {
         var start = tokens.startPosition();
 
-        var name = tokens.next(TokenType.IDENTIFIER);
+        var name = parseIdentifier(tokens);
 
         var end = tokens.endPosition();
         var source = createSource(start, end);
 
         return new UntypedTypeLevelReferenceNode(
-            name.charSequence().toString(),
+            name,
             source
         );
     }
 
+    public static NamespaceName parseNamespaceName(SourceText sourceText) {
+        var tokens = Tokenizer.tokenize(sourceText);
+        var tokenIterator = tokens.iterator();
+        var namespaceName = parseNamespaceName(tokenIterator);
+        tokenIterator.skip(TokenType.END);
+        return namespaceName;
+    }
+
+    static NamespaceName parseNamespaceName(TokenIterator tokens) {
+        var namespaceParts = parseMany(
+            () -> !tokens.isNext(TokenType.IDENTIFIER),
+            () -> parseIdentifier(tokens),
+            () -> tokens.trySkip(TokenType.SYMBOL_FORWARD_SLASH)
+        );
+
+        return new NamespaceName(namespaceParts);
+    }
+
+    private static String parseIdentifier(TokenIterator tokens) {
+        return tokens.next(TokenType.IDENTIFIER).charSequence().toString();
+    }
+
     /**
      * Parse zero, one, or many instances of {@code T} using {@code parseOne}.
      * Each instance is expected to be separated by tokens consumed by
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/parser/ParserNamespaceNameTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/parser/ParserNamespaceNameTests.java
new file mode 100644
index 0000000..4fe82fc
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/parser/ParserNamespaceNameTests.java
@@ -0,0 +1,22 @@
+package org.zwobble.hobgoblin.compiler.parser;
+
+import org.junit.jupiter.api.Test;
+import org.zwobble.hobgoblin.compiler.types.NamespaceName;
+
+import static org.zwobble.hobgoblin.compiler.parser.ParserTesting.parseString;
+import static org.zwobble.precisely.AssertThat.assertThat;
+import static org.zwobble.precisely.Matchers.equalTo;
+
+public class ParserNamespaceNameTests {
+    @Test
+    public void canParseTopLevelNamespace() {
+        var source = "shapes";
+
+        var namespaceName = parseString(
+            source,
+            Parser::parseNamespaceName
+        );
+
+        assertThat(namespaceName, equalTo(NamespaceName.of("shapes")));
+    }
+}