introducing a new programming language

-- comments start with two '-'., and end with a newline. ++ block comments start with two '+', and end with two '+'. ++ ** I'm not sure about block comments, it may be better with two "*". ** --# statements: -- `;` can be used to separate statements, but they aren't mandatory. -- `\n` (newline) will be considered as a statement separator, when needed. a = 1 + 2 -- or a = 1 + 2 -- ' ' can be used where you need to beautify your codes. can't be used between -- digits of a number or letters of a variable name. a_float = 10 . 3 -- valid variable . attribute_of_variable = 5 -- valid a_number = 4493 9283 -- two integers: 4493, 9283 -- `~` can be used to continue statements. very_long_ling_long_long_long_long_long_long_long_and_long_variable_name = 10 ~ .30 -- very_..._variable_name = 10.30 --# variable names: -- variable names must math regex pattern '[_a-zA-Z][_a-zA-Z0-9]*', and they -- can't be 'T', 'F', 'N' constants. -- at start of a file, no variable defined. -- none of these variables previously defined: _abc1 = 1 -- valid abcd = 1 -- valid if = 1 -- valid while = 1 -- valid for = 1 -- valid else = 1 -- valid char = 1 -- valid integer = 1 -- valid int = 1 -- valid float = 1 -- valid string = 1 -- valid True = 1 -- valid NULL = 1 -- valid print = 1 -- valid puts = 1 -- valid io = 1 -- valid sys = 1 -- valid stdio = 1 -- valid stdlib = 1 -- valid stdin = 1 -- valid system = 1 -- valid 1good = 1 -- invalid her-b = 1 -- invalid her_b = 1 -- valid --# types: char = 'a' int = 10 float = 12.3 -- 'T', 'F', 'N' characters are constant values. bool = T || F none = N array = [1, 2, 3] -- an array of any type string = "abc" -- an array of only char type object = {} code = #{a = $b} -- a code object function => 10; -- a lazy evaluation, or function -- or function = @ => 1; -- anonymous function module = [# name] -- a module, for external files and libraries --# simple types: english_first_letter = 'a' seconds_in_a_year = 60 * 60 * 24 * 365 pi_number = 3.14159265 true = T false = F -- and none = N -- we can't compare none and booleans T == F -- no error N == T -- error: can't compare N and T --# length of arrays: var1 = "Hello" var1_len = var1.len -- var1_len = 5 var2 = [1, 2, 3] var2_len = var2.len -- var2_len = 3 --# append arrays: var1 = "Hello" var1 += " World" -- var1 = "Hello World" var2 = [1, 2, 3] var2 += [4] -- var2 = [1, 2, 3, 4] --# multiply arrays: var1 = "-" * 5 -- var1 = "-----" var2 = "bye" * 3 -- var2 = "byebyebye" --# defining objects: -- objects are likes classes or structures, or maybe name spaces. var1 = { name = "John" age = 45 } var1_name = var1.name -- var1_name = "John" var1.color = "white" -- set color attribute of var1 -- can be used for defining temporary variables: var2 = { -- var2 = 160 sum = 1 + 3 + 5 + 7 result = sum * 10 }.result --# defining code object: define_var = #(var = 10); define_var; is_ten = (var == 10); -- is_ten = T --# defining lazy evaluations or functions: sum a b => a + b; -- or sum = @ a b => (a + b); -- anonymous function --# check type of variables: -- get type of variables by placing a '?' after them. they will be returned as -- strings. var = 2.3 var_type = var? -- var_type = "float" var1 = [1, 2, 3] is_array = (var1? == "array") -- is_array = T var2 = [1, 'a', "abc"] var2_type = var2? -- var2_type = "array" -- get full type notation by placing two '?' after them. they will be returned -- as strings. var2_full_type = var2?? -- var2_full_type = "[int, char, string]" var3 = [[1], [1, 1.0]] var3_full_type = var3?? -- var3_full_type = "[[int], [int, float]]" var4 = { name = "John" age = 30 } var4_type = var4? -- var4_type = "object" var4_full_type = var4?? -- var4_full_type = "{name: string, age: int}" --# dynamic typed: var1 = 10 var1 = "Hello" -- no error --# static typed: int_type value => (value? == "int"); number :: int_type; -- type declartion -- or number :: (number? == "int"); -- same thing -- or number :: int_type = 1; -- type declartion and variable assignment number = 10 -- no error number = "bye" -- error: `number` assign assertion failed. --# program flow: --# branches: -- mnemonic: LABEL: loop: end: --# jump to branches: -- mnemonic: -> LABEL -> loop -> end --# conditional branches: -- mnemonic: ( CONDITION ): STATEMENT; (a == N): a = 1; (a >= 0): ( a = a + 1; b = a + 2; ) --# algorithm examples: -- check whether a number is even or not print = [# io].print is_even num => (num % 2 == 0) (is_even 10): ( print "even" -> end ) print "old" end: -- find max number in a list list = [1, 5, 2, 6, 3, 8, 0] max = list[0] index = 1 loop: (index < list.len): ( (list[index] > max): max = list[index]; index += 1; -> loop; )