ParseBody now has a loop, and errors on unrecognized section type

parser/body.go

@@ -1,26 +1,34 @@
 package parser
 
+import "git.tebibyte.media/sashakoshka/arf/file"
 import "git.tebibyte.media/sashakoshka/arf/lexer"
 
 // parse body parses the body of an arf file, after the metadata header.
 func (parser *ParsingOperation) parseBody () (err error) {
-	err = parser.nextToken(lexer.TokenKindName)
-	if err != nil { return }
-
-	switch parser.token.Value().(string) {
-	case "data":
-		var section *DataSection
-		section, err = parser.parseDataSection()
+	for {
+		err = parser.expect(lexer.TokenKindName)
 		if err != nil { return }
-		if parser.tree.dataSections == nil {
-			parser.tree.dataSections = make(map[string] *DataSection)
-		}
-		parser.tree.dataSections[section.name] = section
-	case "type":
-	case "face":
-	case "enum":
-	case "func":
-	}
 
-	return
+		sectionType := parser.token.Value().(string)
+		switch sectionType {
+		case "data":
+			var section *DataSection
+			section, err = parser.parseDataSection()
+			if err != nil { return }
+			if parser.tree.dataSections == nil {
+				parser.tree.dataSections =
+					make(map[string] *DataSection)
+			}
+			parser.tree.dataSections[section.name] = section
+		case "type":
+		case "face":
+		case "enum":
+		case "func":
+		default:
+			err = parser.token.NewError (
+				"unknown section type \"" + sectionType + "\"",
+				file.ErrorKindError)
+			return
+		}
+	}
 }