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Diffstat (limited to 'JPratt/src/main/java/bjc/pratt/commands/impls/TernaryCommand.java')
| -rw-r--r-- | JPratt/src/main/java/bjc/pratt/commands/impls/TernaryCommand.java | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/JPratt/src/main/java/bjc/pratt/commands/impls/TernaryCommand.java b/JPratt/src/main/java/bjc/pratt/commands/impls/TernaryCommand.java deleted file mode 100644 index 786dfec..0000000 --- a/JPratt/src/main/java/bjc/pratt/commands/impls/TernaryCommand.java +++ /dev/null @@ -1,76 +0,0 @@ -package bjc.pratt.commands.impls; - -import bjc.pratt.ParserContext; -import bjc.pratt.blocks.ParseBlock; -import bjc.pratt.commands.BinaryPostCommand; -import bjc.pratt.commands.CommandResult; -import bjc.pratt.commands.CommandResult.Status; -import bjc.pratt.tokens.Token; -import bjc.data.Tree; -import bjc.data.SimpleTree; -import bjc.utils.parserutils.ParserException; - -/** - * A ternary command, like C's ?: - * - * @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 class TernaryCommand<K, V, C> extends BinaryPostCommand<K, V, C> { - private final ParseBlock<K, V, C> innerBlck; - - private final Token<K, V> mark; - - private final boolean nonassoc; - - /** - * Create a new ternary command. - * - * @param precedence The precedence of this operator. - * - * @param innerBlock The representation of the inner block of the expression. - * - * @param marker The token to use as the root of the AST node. - * - * @param isNonassoc Whether or not the conditional is associative. - */ - public TernaryCommand(final int precedence, final ParseBlock<K, V, C> innerBlock, final Token<K, V> marker, - final boolean isNonassoc) { - super(precedence); - - if (innerBlock == null) - throw new NullPointerException("Inner block must not be null"); - else if (marker == null) - throw new NullPointerException("Marker must not be null"); - - innerBlck = innerBlock; - mark = marker; - nonassoc = isNonassoc; - } - - @Override - public CommandResult<K, V> denote(final Tree<Token<K, V>> operand, final Token<K, V> operator, - final ParserContext<K, V, C> ctx) throws ParserException { - final CommandResult<K, V> innerRes = innerBlck.parse(ctx); - if (innerRes.status != Status.SUCCESS) return innerRes; - Tree<Token<K, V>> inner = innerRes.success(); - - final CommandResult<K,V> outerRes = ctx.parse.parseExpression(1 + leftBinding(), ctx.tokens, ctx.state, false); - if (outerRes.status != Status.SUCCESS) return outerRes; - Tree<Token<K, V>> outer = outerRes.success(); - return CommandResult.success(new SimpleTree<>(mark, inner, operand, outer)); - } - - @Override - public int nextBinding() { - if (nonassoc) - return leftBinding() - 1; - - return leftBinding(); - } -}
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