Rename format to {}

README.md

@@ -403,7 +403,7 @@ Text and choice lines allow for arbitrary text. Expression can be evaluated and
 Value of a: {a}
 ```
 
-The expression is automatically wrapped in a call to `format(expr)`. You can overload `format` to change its behaviour for custom types.
+The expression is automatically wrapped in a call to `{}(expr)`. You can overload `{}` to change its behaviour for custom types.
 
 ### Event buffer
 
@@ -847,7 +847,7 @@ This only works on strings:
 
 ##### Various
 
-`format(v)`: function called when formatting a value in a text interpolation
+`{}(v)`: function called when formatting a value in a text interpolation for printing
 
 `rand([m[, n]])`: when called whitout arguments, returns a random float in [0,1). Otherwise, returns a random number in [m,n]; m=1 if not given.
 

interpreter/common.lua

@@ -59,7 +59,7 @@ common = {
 		end
 	end,
 	-- format a anselme value to something printable
-	-- does not call custom format() functions, only built-in ones, so it should not be able to fail
+	-- does not call custom {}() functions, only built-in ones, so it should not be able to fail
 	-- str: if success
 	-- * nil, err: if error
 	format = function(val)

notes.txt

@@ -23,7 +23,7 @@ TODO: add alias to §
 
 Reserved symbols that are still not used in expressions: ~`\_?@$#
 
-Reserved symbols that are still not used as a line type: `^+-=</[]*{}|\_!?.,;()"&%
+Reserved symbols that are still not used as a line type: `^+-=</[]*{}|\_!?.,;)"&%
 
 # Code Q&A
 
@@ -52,6 +52,7 @@ Advantages:
 * can be used for better static variant selection; if everything is type annotated, selection could be restricted to a single function
 Disadvantages:
 * idk if it's worth the trouble
+* could do something like `$ ()(l::list(?), i::number)::?`, but then can't return nil on not found...
 
 TODO: allow to define aliases after the initial definition
 ~ alias(number, "nombre")

parser/common.lua

@@ -34,8 +34,10 @@ common = {
 		"!=", "==", ">=", "<=", "<", ">",
 		"+", "-",
 		"*", "//", "/", "%",
+		"::", ":",
 		"!",
-		"^", "::", ":", "()"
+		"^",
+		"()", "{}"
 	},
 	-- escapement code and their value in strings
 	-- I don't think there's a point in supporting form feed, carriage return, and other printer and terminal related codes
@@ -136,7 +138,7 @@ common = {
 				if not exp then return nil, rem end
 				if not rem:match("^%s*}") then return nil, ("expected closing } at end of expression before %q"):format(rem) end
 				-- wrap in format() call
-				local variant, err = common.find_function_variant(state, namespace, "format", exp, true)
+				local variant, err = common.find_function_variant(state, namespace, "{}", exp, true)
 				if not variant then return variant, err end
 				-- add to text
 				table.insert(l, variant)

stdlib/bootscript.lua

@@ -5,8 +5,4 @@ return [[
 :string="string"
 :list="list"
 :pair="pair"
-
-(Default formatter: doesn't do anything and let built-in formatters do the job)
-$ format(v)
-	@v
 ]]

stdlib/functions.lua

@@ -117,6 +117,13 @@ functions = {
 			return v
 		end
 	},
+	-- format
+	["{}(v)"] = {
+		mode = "raw",
+		value = function(v)
+			return v
+		end
+	},
 	-- pair methods
 	["name(p::pair)"] = {
 		mode = "untyped raw",

test/tests/custom text formatting.ans

@@ -7,5 +7,5 @@ $ Person(name, age)
 
 {abject}
 
-$ format(p::person)
+$ {}(p::person)
 	@"Name: {p("name")}\nAge: {p("age")}"