Simple condition interpreter

Info

Description

TERM:
    IF
    TRUE
    FALSE
    THEN
    ELSE
    STRING
NOTE:
    STRING begins with a quote and ends with the first quote.
    Quote is a symbol `"`.

CONDITION:
    IF [TRUE | FALSE] THEN
        [STRING | CONDITION]
    ELSE
        [STRING | CONDITION]
NOTE:
    It is required to register a pair of IF and ELSE.
    Terms in the terms must be separated by at least one space.
    Spaces are ` `, \\t, \\v, \\n, \\r, \\f.

EBNF

    <condition> =   "IF" <space> <boolean> <space> 
                    "THEN" <space>
                        ( <string> | <condition> ) <space>
                    "ELSE"
                        ( <string> | <condition> ) <space> ;
    <bolean>    =   "TRUE" | "FALSE" ;
    <space>     =   " " | "\\t" | "\\n" | "\\v" | "\\f" | "\\r" ;
    <string>    =   "\\"" { <char> } "\\"" ;
    <char>      =   <utf-8> - "\\""

IDE

IDE.py

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Prerequisites

Language version starting from Python 3.10+ for condition interpreter.

$ python --version
Python 3.10.4

Packages re and tkinter for IDE

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Usage

$ python IDE.py

or

$ python
>>> from condition_interpreter import ConditionInterpreter   
>>> ci = ConditionInterpreter('IF TRUE THEN "Hello, World!" ELSE "Bye, World."')   
>>> ci.run()
'"Hello, World!"'

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Demo

demo 1

run 1

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Authors

• Dmitry Volkov

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Link

• GitHub

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