Cleanup & build files

lamb/utils.py

@@ -0,0 +1,80 @@
+from prompt_toolkit.styles import Style
+from prompt_toolkit.formatted_text import HTML
+from prompt_toolkit import print_formatted_text as printf
+from importlib.metadata import version
+
+import lamb.tokens as tokens
+
+
+def autochurch(results):
+	"""
+	Makes a church numeral from an integer.
+	"""
+
+	num = int(results[0])
+
+	f = tokens.bound_variable()
+	a = tokens.bound_variable()
+
+	chain = a
+
+	for i in range(num):
+		chain = tokens.lambda_apply(f, chain)
+
+	return tokens.lambda_func(
+		f,
+		tokens.lambda_func(
+			a,
+			chain
+		)
+	)
+
+
+
+def show_greeting():
+	#   |  _.._ _.|_
+	#   |_(_|| | ||_)
+	#       0.0.0
+	#
+	#       __  __
+	#    ,-`  ``  `,
+	#   (`   \      )
+	#  (`     \     `)
+	#  (,    / \    _)
+	#   (`  /   \   )
+	#    `'._.--._.'
+	#
+	# A λ calculus engine
+
+	printf(HTML("\n".join([
+		"",
+		"<_h>    |  _.._ _.|_",
+		"    |_(_|| | ||_)</_h>",
+		f"        <_v>{version('lamb')}</_v>",
+		"        __  __",
+		"     ,-`  ``  `,",
+		"    (`   <_l>\\</_l>      )",
+		"   (`     <_l>\\</_l>     `)",
+		"   (,    <_l>/ \\</_l>    _)",
+		"    (`  <_l>/   \\</_l>   )",
+		"     `'._.--._.'",
+		"",
+		"<_s> A λ calculus engine</_s>",
+		"<_p> Type :help for help</_p>",
+		""
+	])), style = Style.from_dict({
+		# Heading
+		"_h": "#FFFFFF bold",
+
+		# Version
+		"_v": "#B4EC85 bold",
+
+		# Lambda
+		"_l": "#FF6600 bold",
+
+		# Subtitle
+		"_s": "#B4EC85 bold",
+
+		# :help message
+		"_p": "#AAAAAA"
+	}))