cyk 1.1.0

context-free grammar parser using the CYK algorithm


To use this package, run the following command in your project's root directory:

Manual usage
Put the following dependency into your project's dependences section:

cyk

A context-free grammar parser using the Cocke–Younger–Kasami algorithm.

Build codecov

Installation

Add cyk to your project with

dub add cyk

Usage

import std.string : split;
import cyk : CYK;

void main() {
    string[] rules = [
        `FunctionDeclaration → ReturnType FunctionName "(" OptionalParameters ")"`,
        `ReturnType → Type`,
        `Type → IntType | FloatingType | "void" | "string"`,
        `IntType → "int" | "long"`,
        `FloatingType → "float" | "double"`,
        `FunctionName → "foo" | "bar" | "baz"`,
        `OptionalParameters → Parameters`,
        `OptionalParameters →`,
        `Parameters → Type ParameterName | Type ParameterName "," Parameters`,
        `ParameterName → "a" | "b" | "c"`
    ];

    CYK cyk = new CYK(rules, "FunctionDeclaration");

    // some valid function declarations
    assert(cyk.check("double foo ( )".split));
    assert(cyk.check("string bar ( int a )".split));
    assert(cyk.check("void baz ( int a , float b , long c )".split));

    // some invalid function declarations
    assert(!cyk.check("double foo ( int )".split));
    assert(!cyk.check("string ( int a )".split));
    assert(!cyk.check("void baz ( int a float b , long c )".split));
}
Authors:
  • Jakob Kogler
Dependencies:
none
Versions:
1.1.0 2021-Jan-16
1.0.2 2021-Jan-16
1.0.1 2021-Jan-16
1.0.0 2021-Jan-16
~main 2021-Jan-16
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Short URL:
cyk.dub.pm