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LALR1Tests.cs
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LALR1Tests.cs
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using System.Collections.Generic;
using Xunit;
using Xunit.Abstractions;
using CNFDotnet.Analysis.Grammar;
using CNFDotnet.Analysis.Parsing;
using CNFDotnet.Analysis.Parsing.LR.LALR1;
namespace CNFDotnet.Tests
{
public class LALR1Tests : BaseParsingTests
{
public static IEnumerable<object[]> LALR1Grammars =>
new object[][]
{
new object[]
{
@"S -> id S'
S' -> V assign E | ε
V -> ε
E -> id V | num",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "S", "s1"),
("0", "id", "s2"),
("1", "$", "a"),
("2", "S'", "s3"),
("2", "V", "s4"),
("2", "$", "r2"),
("2", "assign", "r3"),
("3", "$", "r0"),
("4", "assign", "s5"),
("5", "E", "s6"),
("5", "id", "s7"),
("5", "num", "s8"),
("6", "$", "r1"),
("7", "V", "s9"),
("7", "$", "r3"),
("8", "$", "r5"),
("9", "$", "r4")
)
},
new object[]
{
@"L -> V + L | num
V -> Var ( Var + V ) | ε
Var -> ε",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "L", "s1"),
("0", "V", "s2"),
("0", "num", "s3"),
("0", "Var", "s4"),
("0", "+", "r3"),
("0", "(", "r4"),
("1", "$", "a"),
("2", "+", "s5"),
("3", "$", "r1"),
("4", "(", "s6"),
("5", "L", "s7"),
("5", "V", "s2"),
("5", "num", "s3"),
("5", "Var", "s4"),
("5", "+", "r3"),
("5", "(", "r4"),
("6", "Var", "s8"),
("6", "+", "r4"),
("7", "$", "r0"),
("8", "+", "s9"),
("9", "V", "s10"),
("9", "Var", "s4"),
("9", ")", "r3"),
("9", "(", "r4"),
("10", ")", "s11"),
("11", ")", "r2"),
("11", "+", "r2")
)
},
new object[]
{
@"P -> M * | ε
M -> Q StarM | ε
StarM -> (* M *) | ( Q * )
Q -> o | ε",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "P", "s1"),
("0", "M", "s2"),
("0", "Q", "s3"),
("0", "o", "s4"),
("0", "$", "r1"),
("0", "*", "r3"),
("0", "(*", "r7"),
("0", "(", "r7"),
("1", "$", "a"),
("2", "*", "s5"),
("3", "StarM", "s6"),
("3", "(*", "s7"),
("3", "(", "s8"),
("4", "*", "r6"),
("4", "(*", "r6"),
("4", "(", "r6"),
("5", "$", "r0"),
("6", "*)", "r2"),
("6", "*", "r2"),
("7", "M", "s9"),
("7", "Q", "s3"),
("7", "o", "s4"),
("7", "*)", "r3"),
("7", "(*", "r7"),
("7", "(", "r7"),
("8", "Q", "s10"),
("8", "o", "s4"),
("8", "*", "r7"),
("9", "*)", "s11"),
("10", "*", "s12"),
("11", "*)", "r4"),
("11", "*", "r4"),
("12", ")", "s13"),
("13", "*)", "r5"),
("13", "*", "r5")
)
},
new object[]
{
@"S -> id | V assign E
V -> id
E -> V | num",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "S", "s1"),
("0", "id", "s2"),
("0", "V", "s3"),
("1", "$", "a"),
("2", "$", "r0"),
("2", "assign", "r2"),
("3", "assign", "s4"),
("4", "E", "s5"),
("4", "V", "s6"),
("4", "num", "s7"),
("4", "id", "s8"),
("5", "$", "r1"),
("6", "$", "r3"),
("7", "$", "r4"),
("8", "$", "r2")
)
},
new object[]
{
@"S' -> S
S -> L assign R | R
L -> * R | id
R -> L",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "S'", "s1"),
("0", "S", "s2"),
("0", "L", "s3"),
("0", "R", "s4"),
("0", "*", "s5"),
("0", "id", "s6"),
("1", "$", "a"),
("2", "$", "r0"),
("3", "assign", "s7"),
("3", "$", "r5"),
("4", "$", "r2"),
("5", "R", "s8"),
("5", "L", "s9"),
("5", "*", "s5"),
("5", "id", "s6"),
("6", "$", "r4"),
("6", "assign", "r4"),
("7", "R", "s10"),
("7", "L", "s9"),
("7", "*", "s5"),
("7", "id", "s6"),
("8", "$", "r3"),
("8", "assign", "r3"),
("9", "$", "r5"),
("9", "assign", "r5"),
("10", "$", "r1")
)
},
new object[]
{
@"S -> A x B x
S -> B y A y
A -> w
B -> w",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "S", "s1"),
("0", "A", "s2"),
("0", "B", "s3"),
("0", "w", "s4"),
("1", "$", "a"),
("2", "x", "s5"),
("3", "y", "s6"),
("4", "x", "r2"),
("4", "y", "r3"),
("5", "B", "s7"),
("5", "w", "s8"),
("6", "A", "s9"),
("6", "w", "s10"),
("7", "x", "s11"),
("8", "x", "r3"),
("9", "y", "s12"),
("10", "y", "r2"),
("11", "$", "r0"),
("12", "$", "r1")
)
},
new object[]
{
@"S -> S ; T | T
T -> id | V assign E
V -> id
E -> V | num",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "S", "s1"),
("0", "T", "s2"),
("0", "id", "s3"),
("0", "V", "s4"),
("1", ";", "s5"),
("1", "$", "a"),
("2", "$", "r1"),
("2", ";", "r1"),
("3", "$", "r2"),
("3", ";", "r2"),
("3", "assign", "r4"),
("4", "assign", "s6"),
("5", "T", "s7"),
("5", "id", "s3"),
("5", "V", "s4"),
("6", "E", "s8"),
("6", "V", "s9"),
("6", "num", "s10"),
("6", "id", "s11"),
("7", "$", "r0"),
("7", ";", "r0"),
("8", "$", "r3"),
("8", ";", "r3"),
("9", "$", "r5"),
("9", ";", "r5"),
("10", "$", "r6"),
("10", ";", "r6"),
("11", "$", "r4"),
("11", ";", "r4")
)
},
new object[]
{
@"L -> V ( args ) | L equals Var ( )
V -> Var + V | id
Var -> id",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "L", "s1"),
("0", "V", "s2"),
("0", "Var", "s3"),
("0", "id", "s4"),
("1", "equals", "s5"),
("1", "$", "a"),
("2", "(", "s6"),
("3", "+", "s7"),
("4", "(", "r3"),
("4", "+", "r4"),
("5", "Var", "s8"),
("5", "id", "s9"),
("6", "args", "s10"),
("7", "V", "s11"),
("7", "Var", "s3"),
("7", "id", "s4"),
("8", "(", "s12"),
("9", "(", "r4"),
("10", ")", "s13"),
("11", "(", "r2"),
("12", ")", "s14"),
("13", "$", "r0"),
("13", "equals", "r0"),
("14", "$", "r1"),
("14", "equals", "r1")
)
},
new object[]
{
@"E -> O : OL | O
O -> id | OL l
OL -> id | ( O : OL )",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "E", "s1"),
("0", "O", "s2"),
("0", "id", "s3"),
("0", "OL", "s4"),
("0", "(", "s5"),
("1", "$", "a"),
("2", ":", "s6"),
("2", "$", "r1"),
("3", ":", "r2"),
("3", "$", "r2"),
("3", "l", "r4"),
("4", "l", "s7"),
("5", "O", "s8"),
("5", "id", "s3"),
("5", "OL", "s4"),
("5", "(", "s5"),
("6", "OL", "s9"),
("6", "id", "s10"),
("6", "(", "s5"),
("7", ":", "r3"),
("7", "$", "r3"),
("8", ":", "s11"),
("9", "$", "r0"),
("10", ")", "r4"),
("10", "$", "r4"),
("11", "OL", "s12"),
("11", "id", "s10"),
("11", "(", "s5"),
("12", ")", "s13"),
("13", ")", "r5"),
("13", "$", "r5"),
("13", "l", "r5")
)
},
new object[]
{
@"S -> a g d | a A c | b A d | b g c
A -> B
B -> g",
new LR1GenericParsingTable<LALR1KernelItem>
(
("0", "S", "s1"),
("0", "a", "s2"),
("0", "b", "s3"),
("1", "$", "a"),
("2", "g", "s4"),
("2", "A", "s5"),
("2", "B", "s6"),
("3", "A", "s7"),
("3", "g", "s8"),
("3", "B", "s6"),
("4", "d", "s9"),
("4", "c", "r5"),
("5", "c", "s10"),
("6", "d", "r4"),
("6", "c", "r4"),
("7", "d", "s11"),
("8", "c", "s12"),
("8", "d", "r5"),
("9", "$", "r0"),
("10", "$", "r1"),
("11", "$", "r2"),
("12", "$", "r3")
)
}
};
public LALR1Tests(ITestOutputHelper testOutputHelper)
: base(testOutputHelper)
{ }
#pragma warning disable CA1707
[Theory]
[MemberData(nameof(LALR1Tests.LALR1Grammars))]
public void LALR1_Valid_Grammar
(
string grammar,
LR1GenericParsingTable<LALR1KernelItem> verification
)
{
CNFGrammar cnfGrammar = this.GenerateGrammar(grammar);
IParsing<LALR1Action> larl1Parsing
= BaseParsingTests.CreateLALR1Parsing(cnfGrammar);
larl1Parsing.Classify();
IParsingTable<LALR1Action> lr1ParsingTable
= larl1Parsing.CreateParsingTable();
Assert.NotNull(lr1ParsingTable);
this.TestOutputHelper.WriteLine("Verifying parsing table");
verification.Verify(cnfGrammar, lr1ParsingTable);
}
#pragma warning restore CA1707
}
}