Allow morphemes to be none

leipzig-gloss-examples.typ

@@ -92,6 +92,28 @@ The `#gloss` function has three pre-defined parameters for glossing levels:
 for unaligned text: `header_text` for text that precedes the gloss, and
 `translation` for text that follows the gloss.
 
+
+The `morphemes` param can be skipped, if you just want to provide a source
+text and translation, without a gloss:
+
+#gloss(
+    source_text: ([Trato de entender, debo comprender qué es lo que ha hecho conmigo],),
+    translation: [I try to understand, I should comprehend, what it has done with me],
+)
+
+#codeblock[
+```typst
+#gloss(
+    source_text: ([Trato de entender, debo comprender qué es lo que ha hecho conmigo],),
+    translation: [I try to understand, I should comprehend, what it has done with me],
+)
+```
+]
+
+Note that it is still necessary to wrap the `source_text` argument in an array of length one.
+
+
+
 If one wishes to add more than three glossing lines, there is an additional
 parameter `additional_gloss_lines` that can take a list of arbitrarily many more glossing
 lines, which will appear below those specified in the aforementioned

leipzig-gloss.typ

@@ -40,7 +40,7 @@
     source_text_style: emph,
     transliteration: none,
     transliteration_style: none,
-    morphemes: (),
+    morphemes: none,
     morphemes_style: none,
     additional_gloss_lines: (), //List of list of content
     translation: none,
@@ -53,9 +53,11 @@
 ) = {
 
     assert(type(source_text) == "array", message: "source_text needs to be an array; perhaps you forgot to type `(` and `)`, or a trailing comma?")
-    assert(type(morphemes) == "array", message: "morphemes needs to be an array; perhaps you forgot to type `(` and `)`, or a trailing comma?")
 
-    assert(source_text.len() == morphemes.len(), message: "source_text and morphemes have different lengths")
+    if morphemes != none {
+        assert(type(morphemes) == "array", message: "morphemes needs to be an array; perhaps you forgot to type `(` and `)`, or a trailing comma?")
+        assert(source_text.len() == morphemes.len(), message: "source_text and morphemes have different lengths")
+    }
 
     if transliteration != none {
         assert(transliteration.len() == source_text.len(), message: "source_text and transliteration have different lengths")
@@ -80,8 +82,10 @@
             gloss_line_lists.push(transliteration)
         }
 
-        formatters.push(morphemes_style)
+        if morphemes != none {
-        gloss_line_lists.push(morphemes)
+            formatters.push(morphemes_style)
+            gloss_line_lists.push(morphemes)
+        }
 
         for additional in additional_gloss_lines {
             formatters.push(none) //TODO fix this

typst.toml

@@ -1,6 +1,6 @@
 [package]
 name = "leipzig-glossing"
-version = "0.1.0"
+version = "0.1.9"
 entrypoint = "leipzig-gloss.typ"
 authors = ["Greg Shuflin", "Other open-source contributors"]
 license = "MIT"