public Start getStartSymbol(Nonterminal nt) {
Start start = Start.from(nt);
if (definitions.keySet().contains(start)) return start;
Rule startRule;
if (layout != null)
startRule =
Rule.withHead(start)
.setLabel("Start")
.addSymbol(layout)
.addSymbol(nt)
.addSymbol(layout)
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.getFirstAndDone())
.build();
else
startRule =
Rule.withHead(start)
.addSymbol(nt)
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.getFirstAndDone())
.build();
definitions.put(start, CollectionsUtil.list(startRule));
rules.add(startRule);
return start;
}
@Test
public void test() {
Grammar grammar =
Grammar.builder()
// $default$ ::= {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("$default$").build())
.setLayoutStrategy(NO_LAYOUT)
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
// E ::= ('-') E {UNDEFINED,1,RIGHT_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(45).build()).build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.RIGHT_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, 1, true, false, false, false))
.build())
// E ::= ('a') {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(97).build()).build())
.build())
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, 1, true, false, false, false))
.build())
// E ::= E ('^') E {LEFT,2,LEFT_RIGHT_REC} PREC(2,2)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(94).build()).build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.LEFT_RIGHT_REC)
.setAssociativity(Associativity.LEFT)
.setPrecedence(2)
.setPrecedenceLevel(PrecedenceLevel.from(2, 2, -1, false, false, true, false))
.build())
// E ::= E ('*') E {UNDEFINED,3,LEFT_RIGHT_REC} PREC(3,3)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(42).build()).build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.LEFT_RIGHT_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(3)
.setPrecedenceLevel(PrecedenceLevel.from(3, 3, 3, false, false, true, false))
.build())
// S ::= E {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("S").build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
.build();
// grammar = new EBNFToBNF().transform(grammar);
System.out.println(grammar);
grammar = new DesugarPrecedenceAndAssociativity().transform(grammar);
System.out.println(grammar.toStringWithOrderByPrecedence());
Input input = Input.fromString("a*-a^a");
GrammarGraph graph = GrammarGraph.from(grammar, input, Configuration.DEFAULT);
// Visualization.generateGrammarGraph("test/org/iguana/parser/datadependent/precedence/",
// graph);
ParseResult result = Iguana.parse(input, graph, Nonterminal.withName("S"));
Assert.assertTrue(result.isParseSuccess());
// Visualization.generateSPPFGraph("test/org/iguana/parser/datadependent/precedence/",
// result.asParseSuccess().getSPPFNode(), input);
Assert.assertEquals(0, result.asParseSuccess().getStatistics().getCountAmbiguousNodes());
}
@Test
public void test() {
Grammar grammar =
Grammar.builder()
// $default$ ::= {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("$default$").build())
.setLayoutStrategy(NO_LAYOUT)
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
// E ::= E ('+') E {LEFT,1,LEFT_RIGHT_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(43).build()).build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.LEFT_RIGHT_REC)
.setAssociativity(Associativity.LEFT)
.setPrecedence(1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
// E ::= ('a') {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(97).build()).build())
.build())
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
// S ::= E {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("S").build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
.build();
// grammar = new EBNFToBNF().transform(grammar);
System.out.println(grammar);
grammar = new DesugarPrecedenceAndAssociativity().transform(grammar);
System.out.println(grammar.toStringWithOrderByPrecedence());
Input input = Input.fromString("a+a+a");
GrammarGraph graph = grammar.toGrammarGraph(input, Configuration.DEFAULT);
// Visualization.generateGrammarGraph("/Users/anastasiaizmaylova/git/diguana/test/org/jgll/parser/datadependent/precedence/", graph);
GLLParser parser = ParserFactory.getParser(Configuration.DEFAULT, input, grammar);
ParseResult result = parser.parse(input, graph, Nonterminal.withName("S"));
Assert.assertTrue(result.isParseSuccess());
// Visualization.generateSPPFGraph("/Users/anastasiaizmaylova/git/diguana/test/org/jgll/parser/datadependent/precedence/",
// result.asParseSuccess().getRoot(), input);
Assert.assertTrue(result.asParseSuccess().getStatistics().getCountAmbiguousNodes() == 0);
}
@Test
public void test() {
Grammar grammar =
Grammar.builder()
.setLayout(Nonterminal.builder("L").build())
// $default$ ::= {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("$default$").build())
.setLayoutStrategy(NO_LAYOUT)
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
// L ::= (\u0009-\\u000A | \\u000D | \u0020)* !>> (\u0009-\\u000A | \\u000D | \u0020)
// {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("L").build())
.addSymbol(
Star.builder(
Alt.builder(
CharacterRange.builder(9, 10).build(),
CharacterRange.builder(13, 13).build(),
CharacterRange.builder(32, 32).build())
.build())
.addPostConditions(
set(
new RegularExpressionCondition(
ConditionType.NOT_FOLLOW,
Alt.builder(
CharacterRange.builder(9, 10).build(),
CharacterRange.builder(13, 13).build(),
CharacterRange.builder(32, 32).build())
.build())))
.build())
.setLayoutStrategy(NO_LAYOUT)
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
// E ::= (i f) E (t h e n) E (e l s e) E {UNDEFINED,1,RIGHT_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(
Sequence.builder(
Character.builder(105).build(),
Character.builder(102).build())
.build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(
Sequence.builder(
Character.builder(116).build(),
Character.builder(104).build(),
Character.builder(101).build(),
Character.builder(110).build())
.build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(
Sequence.builder(
Character.builder(101).build(),
Character.builder(108).build(),
Character.builder(115).build(),
Character.builder(101).build())
.build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.RIGHT_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, 1, true, false, false, false))
.build())
// E ::= (a) {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(97).build()).build())
.build())
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, 1, true, false, false, false))
.build())
// E ::= E (+) E {LEFT,2,LEFT_RIGHT_REC} PREC(2,2)
.addRule(
Rule.withHead(Nonterminal.builder("E").build())
.addSymbol(Nonterminal.builder("E").build())
.addSymbol(
Terminal.builder(Sequence.builder(Character.builder(43).build()).build())
.build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.LEFT_RIGHT_REC)
.setAssociativity(Associativity.LEFT)
.setPrecedence(2)
.setPrecedenceLevel(PrecedenceLevel.from(2, 2, -1, false, false, true, false))
.build())
// S ::= E {UNDEFINED,-1,NON_REC} PREC(1,1)
.addRule(
Rule.withHead(Nonterminal.builder("S").build())
.addSymbol(Nonterminal.builder("E").build())
.setRecursion(Recursion.NON_REC)
.setAssociativity(Associativity.UNDEFINED)
.setPrecedence(-1)
.setPrecedenceLevel(PrecedenceLevel.from(1, 1, -1, false, false, false, false))
.build())
.build();
grammar = new EBNFToBNF().transform(grammar);
grammar = new DesugarPrecedenceAndAssociativity().transform(grammar);
System.out.println(grammar.toStringWithOrderByPrecedence());
grammar = new LayoutWeaver().transform(grammar);
Input input = Input.fromString("a + if a then a else a + a");
GrammarGraph graph = grammar.toGrammarGraph(input, Configuration.DEFAULT);
// Visualization.generateGrammarGraph("/Users/anastasiaizmaylova/git/diguana/test/org/jgll/parser/datadependent/precedence/", graph);
GLLParser parser = ParserFactory.getParser(Configuration.DEFAULT, input, grammar);
ParseResult result = parser.parse(input, graph, Nonterminal.withName("S"));
Assert.assertTrue(result.isParseSuccess());
Visualization.generateSPPFGraph(
"/Users/anastasiaizmaylova/git/diguana/test/org/jgll/parser/datadependent/precedence/",
result.asParseSuccess().getRoot(),
input);
Assert.assertTrue(result.asParseSuccess().getStatistics().getCountAmbiguousNodes() == 0);
}