diff options
Diffstat (limited to 'JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryPostCommand.java')
| -rw-r--r-- | JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryPostCommand.java | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryPostCommand.java b/JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryPostCommand.java new file mode 100644 index 0000000..bacab23 --- /dev/null +++ b/JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryPostCommand.java @@ -0,0 +1,36 @@ +package com.ashardalon.pratt.commands; + +/** + * A operator with fixed precedence. + * + * @author bjculkin + * + * @param <K> + * The key type of the tokens. + * + * @param <V> + * The value type of the tokens. + * + * @param <C> + * The state type of the parser. + */ +public abstract class BinaryPostCommand<K, V, C> extends NonInitialCommand<K, V, C> { + private final int leftPower; + + /** + * Create a new operator with fixed precedence. + * + * @param precedence + * The precedence of the operator. + */ + public BinaryPostCommand(final int precedence) { + if(precedence < 0) throw new IllegalArgumentException("Precedence must be non-negative"); + + leftPower = precedence; + } + + @Override + public int leftBinding() { + return leftPower; + } +}
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