christoph/lecture-compilers
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catch wrong actions

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ChUrl
2020-12-11 14:00:28 +01:00
parent c7b3e7806e
commit 6dc278d4d4
1 changed files with 19 additions and 0 deletions
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19
src/main/java/parser/grammar/Grammar.java
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@ -1,10 +1,13 @@
package parser.grammar; package parser.grammar;
import parser.Actions;
import java.io.IOException; import java.io.IOException;
import java.nio.file.Files; import java.nio.file.Files;
import java.nio.file.Path; import java.nio.file.Path;
import java.util.AbstractMap.SimpleEntry; import java.util.AbstractMap.SimpleEntry;
import java.util.Arrays; import java.util.Arrays;
import java.util.Collection;
import java.util.Collections; import java.util.Collections;
import java.util.HashMap; import java.util.HashMap;
import java.util.HashSet; import java.util.HashSet;
@ -102,6 +105,14 @@ public class Grammar {
.map(String::trim) .map(String::trim)
.filter(flag -> !flag.isEmpty()) .filter(flag -> !flag.isEmpty())
.collect(Collectors.toList()); .collect(Collectors.toList());
List<String> enumActions = Arrays.stream(Actions.values())
.map(action -> action.toString().toLowerCase())
.collect(Collectors.toList());
for (String flag : flagList) {
if (!enumActions.contains(flag)) {
throw new GrammarParseException("Falsche Action in Grammatik");
}
}
// "S[C R]" wird zu "S" // "S[C R]" wird zu "S"
leftside = leftside.substring(0, open); leftside = leftside.substring(0, open);
@ -172,4 +183,12 @@ public class Grammar {
public Set<String> getActions(String leftside, String rightside) { public Set<String> getActions(String leftside, String rightside) {
return this.actions == null ? Collections.emptySet() : this.actions.get(new SimpleEntry<>(leftside, rightside)); return this.actions == null ? Collections.emptySet() : this.actions.get(new SimpleEntry<>(leftside, rightside));
} }
public Set<String> getAllActions(String rightside) {
return this.actions.entrySet().stream()
.filter(entry -> entry.getKey().getValue().equals(rightside))
.map(Map.Entry::getValue)
.flatMap(Collection::stream)
.collect(Collectors.toUnmodifiableSet());
}
} }