diff options
| author | bjculkin <bjculkin@mix.wvu.edu> | 2017-04-05 15:35:13 -0400 |
|---|---|---|
| committer | bjculkin <bjculkin@mix.wvu.edu> | 2017-04-05 15:35:13 -0400 |
| commit | c82452e59b1547392c3e89d08d9173cc6dc79e23 (patch) | |
| tree | 1927051f7cab7a64eef3f53a78b77780db6cf281 /JPratt/src/main/java/bjc/utils/parserutils/pratt/blocks/RepeatingParseBlock.java | |
| parent | b61c66d5e0c18faee68eb91881d5dfe760818856 (diff) | |
Reorganize
Diffstat (limited to 'JPratt/src/main/java/bjc/utils/parserutils/pratt/blocks/RepeatingParseBlock.java')
| -rw-r--r-- | JPratt/src/main/java/bjc/utils/parserutils/pratt/blocks/RepeatingParseBlock.java | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/JPratt/src/main/java/bjc/utils/parserutils/pratt/blocks/RepeatingParseBlock.java b/JPratt/src/main/java/bjc/utils/parserutils/pratt/blocks/RepeatingParseBlock.java deleted file mode 100644 index 08a4bae..0000000 --- a/JPratt/src/main/java/bjc/utils/parserutils/pratt/blocks/RepeatingParseBlock.java +++ /dev/null @@ -1,96 +0,0 @@ -package bjc.utils.parserutils.pratt.blocks; - -import java.util.function.UnaryOperator; - -import bjc.utils.data.ITree; -import bjc.utils.data.Tree; -import bjc.utils.parserutils.ParserException; -import bjc.utils.parserutils.pratt.ParseBlock; -import bjc.utils.parserutils.pratt.ParserContext; -import bjc.utils.parserutils.pratt.Token; - -/** - * A parse block that can parse a sequnce of zero or more occurances of another - * block. - * - * @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 RepeatingParseBlock<K, V, C> implements ParseBlock<K, V, C> { - private ParseBlock<K, V, C> innerBlock; - - private K delim; - private K term; - - private UnaryOperator<C> onDelim; - - private Token<K, V> mark; - - /** - * Create a new repeating block. - * - * @param inner - * The inner block for elements. - * - * @param delimiter - * The token that delimits elements in the sequence. - * - * @param terminator - * The token that terminates the sequence. - * - * @param marker - * The token to use as the node in the AST. - * - * @param action - * The action to apply to the state after every - * delimiter. - */ - public RepeatingParseBlock(ParseBlock<K, V, C> inner, K delimiter, K terminator, Token<K, V> marker, - UnaryOperator<C> action) { - super(); - - if (inner == null) - throw new NullPointerException("Inner block must not be null"); - else if (delimiter == null) - throw new NullPointerException("Delimiter must not be null"); - else if (terminator == null) throw new NullPointerException("Terminator must not be null"); - - innerBlock = inner; - - delim = delimiter; - term = terminator; - - mark = marker; - - onDelim = action; - } - - @Override - public ITree<Token<K, V>> parse(ParserContext<K, V, C> ctx) throws ParserException { - ITree<Token<K, V>> ret = new Tree<>(mark); - - Token<K, V> tok = ctx.tokens.current(); - - while (!tok.getKey().equals(term)) { - ITree<Token<K, V>> kid = innerBlock.parse(ctx); - ret.addChild(kid); - - tok = ctx.tokens.current(); - - ctx.tokens.expect(delim, term); - - if (onDelim != null) ctx.state = onDelim.apply(ctx.state); - } - - return ret; - } - -} |
