christoph/lecture-compilers
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adapt implementation to use grammar wrapper

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Christoph
2020-12-04 13:22:54 +01:00
parent 1ae77b2e51
commit 1b0dd064d7
5 changed files with 106 additions and 67 deletions
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49
src/test/java/parser/LL1GrammarAnalyzerTest.java
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@ -1,12 +1,12 @@
package parser;
import org.junit.jupiter.api.Test;
import parser.grammar.Grammar;
import parser.grammar.GrammarRule;
import parser.grammar.LL1GrammarAnalyzer;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.assertj.core.api.Assertions.assertThat;
@ -32,16 +32,16 @@ class LL1GrammarAnalyzerTest {
String startSymbol = "S";
String epsilonSymbol = "epsilon";
String[] productions0 = {"a", "i E t S"};
String[] productions1 = {"b"};
Set<GrammarRule> rules = new HashSet<>();
rules.add(new GrammarRule("S", "a"));
rules.add(new GrammarRule("S", "i", "E", "t", "S"));
rules.add(new GrammarRule("E", "b"));
Map<String, List<String>> map = new HashMap<>();
map.put("S", Arrays.asList(productions0));
map.put("E", Arrays.asList(productions1));
Grammar grammar = new Grammar(terminals, nonterminals,
startSymbol, epsilonSymbol,
rules);
LL1GrammarAnalyzer analyzer = new LL1GrammarAnalyzer(terminals, nonterminals,
startSymbol, epsilonSymbol,
map);
LL1GrammarAnalyzer analyzer = new LL1GrammarAnalyzer(grammar);
assertThat(analyzer.getTable().get("S", "a")).isEqualTo("a");
assertThat(analyzer.getTable().get("S", "i")).isEqualTo("i E t S");
@ -65,22 +65,21 @@ class LL1GrammarAnalyzerTest {
String startSymbol = "E";
String epsilonSymbol = "epsilon";
String[] production0 = {"T E2"};
String[] production1 = {"+ T E2", "epsilon"};
String[] production2 = {"F T2"};
String[] production3 = {"* F T2", "epsilon"};
String[] production4 = {"( E )", "id"};
Set<GrammarRule> rules = new HashSet<>();
rules.add(new GrammarRule("E", "T", "E2"));
rules.add(new GrammarRule("E2", "+", "T", "E2"));
rules.add(new GrammarRule("E2", epsilonSymbol));
rules.add(new GrammarRule("T", "F", "T2"));
rules.add(new GrammarRule("T2", "*", "F", "T2"));
rules.add(new GrammarRule("T2", epsilonSymbol));
rules.add(new GrammarRule("F", "(", "E", ")"));
rules.add(new GrammarRule("F", "id"));
Map<String, List<String>> map = new HashMap<>();
map.put("E", Arrays.asList(production0));
map.put("E2", Arrays.asList(production1));
map.put("T", Arrays.asList(production2));
map.put("T2", Arrays.asList(production3));
map.put("F", Arrays.asList(production4));
Grammar grammar = new Grammar(terminals, nonterminals,
startSymbol, epsilonSymbol,
rules);
LL1GrammarAnalyzer analyzer = new LL1GrammarAnalyzer(terminals, nonterminals,
startSymbol, epsilonSymbol,
map);
LL1GrammarAnalyzer analyzer = new LL1GrammarAnalyzer(grammar);
assertThat(analyzer.getTable().get("F", "id")).isEqualTo("id");
}

13
src/test/java/parser/LL1ParserTest.java
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@ -2,6 +2,7 @@ package parser;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import parser.grammar.Grammar;
import java.util.AbstractMap.SimpleEntry;
import java.util.Arrays;
@ -50,7 +51,11 @@ class LL1ParserTest {
String production2 = "b";
map.put(new SimpleEntry<>("E", "b"), production2);
return new LL1ParsingTable(nonterminals, terminals, startSymbol, epsilonSymbol, map);
Grammar grammar = new Grammar(terminals, nonterminals,
startSymbol, epsilonSymbol,
null);
return new LL1ParsingTable(grammar, map);
}
private static ILL1ParsingTable initTable1() {
@ -97,7 +102,11 @@ class LL1ParserTest {
String production12 = "( E )";
map.put(new SimpleEntry<>("F", "("), production12);
return new LL1ParsingTable(nonterminals, terminals, startSymbol, epsilonSymbol, map);
Grammar grammar = new Grammar(terminals, nonterminals,
startSymbol, epsilonSymbol,
null);
return new LL1ParsingTable(grammar, map);
}
@Test