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Add isAt(Predicate<Character>) method to ImmutableStringReader and StringReader

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This commit is contained in:
ErrorCraft 2021-08-08 21:41:18 +02:00
parent 11758168ba
commit 6d62cc1cb9
3 changed files with 31 additions and 7 deletions
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4
src/main/java/com/mojang/brigadier/ImmutableStringReader.java
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@ -3,6 +3,8 @@
package com.mojang.brigadier;
import java.util.function.Predicate;
public interface ImmutableStringReader {
String getString();
@ -25,4 +27,6 @@ public interface ImmutableStringReader {
char peek(int offset);
boolean isNext(char c);
boolean isNext(Predicate<Character> predicate);
}

19
src/main/java/com/mojang/brigadier/StringReader.java
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@ -5,6 +5,8 @@ package com.mojang.brigadier;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import java.util.function.Predicate;
public class StringReader implements ImmutableStringReader {
private static final char SYNTAX_ESCAPE = '\\';
private static final char SYNTAX_DOUBLE_QUOTE = '"';
@ -81,6 +83,11 @@ public class StringReader implements ImmutableStringReader {
return canRead() && peek() == c;
}
@Override
public boolean isNext(Predicate<Character> predicate) {
return canRead() && predicate.test(peek());
}
public char read() {
return string.charAt(cursor++);
}
@ -98,14 +105,14 @@ public class StringReader implements ImmutableStringReader {
}
public void skipWhitespace() {
while (canRead() && Character.isWhitespace(peek())) {
while (isNext(Character::isWhitespace)) {
skip();
}
}
public int readInt() throws CommandSyntaxException {
final int start = cursor;
while (canRead() && isAllowedNumber(peek())) {
while (isNext(StringReader::isAllowedNumber)) {
skip();
}
final String number = string.substring(start, cursor);
@ -122,7 +129,7 @@ public class StringReader implements ImmutableStringReader {
public long readLong() throws CommandSyntaxException {
final int start = cursor;
while (canRead() && isAllowedNumber(peek())) {
while (isNext(StringReader::isAllowedNumber)) {
skip();
}
final String number = string.substring(start, cursor);
@ -139,7 +146,7 @@ public class StringReader implements ImmutableStringReader {
public double readDouble() throws CommandSyntaxException {
final int start = cursor;
while (canRead() && isAllowedNumber(peek())) {
while (isNext(StringReader::isAllowedNumber)) {
skip();
}
final String number = string.substring(start, cursor);
@ -156,7 +163,7 @@ public class StringReader implements ImmutableStringReader {
public float readFloat() throws CommandSyntaxException {
final int start = cursor;
while (canRead() && isAllowedNumber(peek())) {
while (isNext(StringReader::isAllowedNumber)) {
skip();
}
final String number = string.substring(start, cursor);
@ -181,7 +188,7 @@ public class StringReader implements ImmutableStringReader {
public String readUnquotedString() {
final int start = cursor;
while (canRead() && isAllowedInUnquotedString(peek())) {
while (isNext(StringReader::isAllowedInUnquotedString)) {
skip();
}
return string.substring(start, cursor);

15
src/test/java/com/mojang/brigadier/StringReaderTest.java
View file

@ -6,6 +6,8 @@ package com.mojang.brigadier;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import org.junit.Test;
import java.util.function.Predicate;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;
@ -587,7 +589,7 @@ public class StringReaderTest {
}
@Test
public void isAt() {
public void isNext() {
final StringReader reader = new StringReader("abc");
assertThat(reader.isNext('a'), is(true));
assertThat(reader.isNext('x'), is(false));
@ -596,4 +598,15 @@ public class StringReaderTest {
reader.skip();
assertThat(reader.isNext('c'), is(false));
}
@Test
public void isNext_predicate() {
final StringReader reader = new StringReader("abc");
final Predicate<Character> predicate = c -> (c == 'a' || c == 'b');
assertThat(reader.isNext(predicate), is(true));
reader.setCursor(1);
assertThat(reader.isNext(predicate), is(true));
reader.setCursor(2);
assertThat(reader.isNext(predicate), is(false));
}
}