nomsu/core/text.nom

#!/usr/bin/env nomsu -V4.12.12.8
#
    This file contains some definitions of text escape sequences, including ANSI console
    color codes.
    
use "core/metaprogramming.nom"
use "core/operators.nom"
use "core/control_flow.nom"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

test:
    assume "\[1, 2, 3]" == "[1, 2, 3]"
    assume "foo = \(1 + 2)!" == "foo = 3!"
    assume "one\ntwo" == "\
        ..one
        two"
    assume "nogap" == "\
        ..no\
        ..gap"
    assume (["x", "y"]::joined with ",") == "x,y"
    assume (["x", "y"]::joined) == "xy"
    assume ("BAR"::byte 2) == 65
    assume ("BAR"::bytes 1 to 2) == [66, 65]
    assume ("asdf"::capitalized) == "Asdf"
    assume ("asdf"::uppercase) == "ASDF"
    assume ("asdf"::with "s" -> "X") == "aXdf"
    assume ("one\ntwo\n"::lines) == ["one", "two", ""]
    (%spec とは %body) parses as (%spec means %body)

test:
    %こんにちは = "こんにちは"
    (% と言う) とは "\(%)世界"
    assume (%こんにちは と言う) == "こんにちは世界"

(%expr for %match in %text matching %patt) compiles to:
    define mangler
    return (..)
        Lua "\
            ..(function()
                local \(mangle "comprehension") = List{}
                for \(%match as lua expr) in (\(%text as lua expr)):gmatch(\(%patt as lua expr)) do
                    \(mangle "comprehension")[#\(mangle "comprehension")+1] = \(%expr as lua)
                end
                return \(mangle "comprehension")
            end)()"

test:
    assume "\n" == (newline)

test:
    assume (0xDEADBEEF as hex) == "0xDEADBEEF"

externally (%num as hex) means:
    if (%num < 0):
        return ("-0x%X"::formatted with (- %num))
    ..else:
        return ("0x%X"::formatted with %num)

# Text literals
%escapes = {..}
    nl: "\n", newline: "\n", tab: "\t", bell: "\a", cr: "\r", "carriage return": "\r"
    backspace: "\b", "form feed": "\f", formfeed: "\f", "vertical tab": "\v"

for %name = %str in %escapes:
    with {%lua: Lua (quote %str)}:
        %compile.action.%name = (-> %lua)