feat: add geometric data types and functions (#543)

PR to add new geometric data types and functions.

extensions/functions_geometry.yaml

@@ -0,0 +1,35 @@
+%YAML 1.2
+---
+types:
+  - name: geometry
+    structure: "BINARY"
+#    description: |
+#      An opaque type that can represent one or many points, lines, or shapes encompassing
+#      2, 3 or 4 dimension.
+scalar_functions:
+  -
+    name: "point"
+    description: >
+      Returns a 2D point with the given `x` and `y` coordinate values.
+    impls:
+      - args:
+          - name: x
+            value: fp64
+          - name: y
+            value: fp64
+        return: u!geometry
+  -
+    name: "makeline"
+    description: >
+      Returns a linestring connecting the endpoint of geometry `x` to the begin point of
+      geometry `y`. Repeated points at the beginning of input geometries are collapsed to a single point.
+
+      A linestring can be closed or simple.  A closed linestring starts and ends on the same
+      point. A simple linestring does not cross or touch itself.
+    impls:
+      - args:
+          - name: x
+            value: u!geometry
+          - name: y
+            value: u!geometry
+        return: u!geometry

site/docs/extensions/generate_function_docs.py

@@ -1,18 +1,25 @@
 #!/usr/bin/python3
 # SPDX-License-Identifier: Apache-2.0
 
+import filecmp
 import os
-import mkdocs_gen_files
+import tempfile
 from itertools import cycle
 from pathlib import Path
-import tempfile
-import filecmp
 
+import mkdocs_gen_files
 import oyaml as yaml
 from mdutils.mdutils import MdUtils
 
 
 def write_markdown(file_obj: dict, file_name: str) -> None:
+    if "types" in file_obj:
+        custom_types = file_obj.pop("types")
+        mdFile.new_header(level=2, title="Data Types")
+        for type in custom_types:
+            for key, value in type.items():
+                mdFile.new_line(f"{key}: {value}")
+
     for function_classification, value in file_obj.items():
         function_classification_str = function_classification.replace("_", " ").title()
         mdFile.new_header(level=2, title=f"{function_classification_str}")