tremor-script 0.9.0

Tremor Script Interpreter
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

%% Copyright 2020, The Tremor Team
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%      http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%

-module(gen_script).

-include_lib("pbt.hrl").

-export([gen/1]).

gen_({'+', A, B}) ->  ["(", gen_(A), " + ", gen_(B), ")"];
gen_({'-', A, B}) ->  ["(", gen_(A), " - ", gen_(B), ")"];
gen_({'/', A, B}) ->  ["(", gen_(A), " / ", gen_(B), ")"];
gen_({'*', A, B}) ->  ["(", gen_(A), " * ", gen_(B), ")"];
gen_({'%', A, B}) ->  ["(", gen_(A), " % ", gen_(B), ")"];

gen_({'==', A, B}) ->  ["(", gen_(A), " == ", gen_(B), ")"];
gen_({'!=', A, B}) ->  ["(", gen_(A), " != ", gen_(B), ")"];
gen_({'>=', A, B}) ->  ["(", gen_(A), " >= ", gen_(B), ")"];
gen_({'>', A, B}) ->  ["(", gen_(A), " > ", gen_(B), ")"];
gen_({'<', A, B}) ->  ["(", gen_(A), " < ", gen_(B), ")"];
gen_({'<=', A, B}) ->  ["(", gen_(A), " <= ", gen_(B), ")"];
gen_({'and', A, B}) ->  ["(", gen_(A), " and ", gen_(B), ")"];
gen_({'or', A, B}) ->  ["(", gen_(A), " or ", gen_(B), ")"];
gen_({'not', A}) ->  ["not (", gen_(A), ")"];
gen_({'+', A})  -> ["(+ ", gen_(A), ")"];
gen_({'-', A}) -> ["(- ", gen_(A), ")"];
gen_({'let', Path, Expr}) -> ["let ", gen_(Path), " = ", gen_(Expr)];
gen_({local, Path}) -> Path;
gen_({emit, A}) -> ["emit (", gen_(A), ")"];
gen_(drop) -> "drop";
gen_(true) -> "true";
gen_(false) -> "false";
gen_(null) -> "null";
gen_(X) when is_number(X) -> io_lib:format("~p", [X]);
gen_(X) when is_binary(X) -> jsx:encode(X).

gen(Expr) ->
    iolist_to_binary(gen_(Expr)).