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Topic: Parse tree

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	Ed Summers / CQL-Parser - search.cpan.org
		represents a boolean node in a CQL parse tree
		represents a NOT node in a CQL parse tree
		represents a prefix node in a CQL parse tree
	search.cpan.org /dist/CQL-Parser (131 words)

	Parsing in CL Research Products
		The output of parsing some input is a parse tree, starting with a single non-terminal node and breaking this node into its constituents, which may be other non-terminal nodes and continuing until leaf nodes (representing the words in the input) are reached.
		The parse tree is based on a grammar and is constructed as the input is consumed.
		A parse list node is created with the rule number that created them as the "value" field, the parse tree node as its "content" field, and a pointer to the parse list node of which it is a constituent as the "successor" field.
	www.clres.com /parser/parsing_process.html (1466 words)

	Parse tree - Wikipedia, the free encyclopedia
		A parse tree or concrete syntax tree is a tree that represents the syntactic structure of a string according to some formal grammar.
		Parse trees may be generated for sentences in natural languages (see natural language processing), as well as during processing of computer languages, such as programming languages.
		In a parse tree, each node is either a root node, a branch node, or a leaf node.
	en.wikipedia.org /wiki/Parse_tree (267 words)

	parser -- Access Python parse trees
		The parse trees stored in the AST objects created by this module are the actual output from the internal parser when created by the expr or suite functions, described below.
		The exception argument is either a string describing the reason of the failure or a tuple containing a sequence causing the failure from a parse tree passed to sequence2ast and an explanatory string.
		The association between the docstring in a similar tree and the defined entity (class, function, or module) which it describes is given by the position of the docstring subtree within the tree defining the described structure.
	effbot.org /pylib/parser.htm (3486 words)

	Binary Trees
		It is difficult to print trees down the page, because they quickly grow too wide, but it is relatively easy to print them across the page so that the root is at the left and the tree grows to the right.
		For non-emptyTree trees, it may be appropriate to try a tree of a "few" nodes and a tree of a single node.
		Output is the tree of the expression that is the result of differentiation with respect to a given variable.
	www.csse.monash.edu.au /~lloyd/tildeAlgDS/Tree (2822 words)

	About Parse Trees
		VisualText analyzers build and use a single parse tree (or tree, for short) which is a data structure that tracks the patterns that have matched within the input text.
		Building parse trees is similar to the sentence diagramming taught in elementary school.
		The first pass of every analyzer tokenizes the text, that is, it converts a stream of characters to a parse tree in which alphabetic, numeric, whitespace, and punctuation are grouped into units called nodes.
	www.textanalysis.com /help/visualtext_basics/about_parse_trees.htm (593 words)

	: Class ParseTreeRule (Site not responding. Last check: )
		represents a tree composed of a root category and an array of daughter parse trees.
		A parse tree derived from a rule provides information about the category of the root as well as a composite of the daughter categories.
		This involves producing the bracketing for the tree itself, and recursively for all of the daughter trees.
	www.colloquial.com /carp/Parser/Doc/JavaDoc/ParseTreeRule.html (176 words)

	Compact Representation of Parse Trees
		Thus the parse tree of a sentence may be constructed as a side-effect of the recognition phase.
		The set of derived trees for this tree substitution grammar equals the set of derivation trees of the parse (ignoring the non-terminal symbols of the tree substution grammar).
		This enables the construction of a term for each local tree in the head_corner predicate consisting of the name of the rule that was applied and the list of references of the result-items used for the left and right daughters of that rule.
	odur.let.rug.nl /~vannoord/papers/cl97/node4.html (1269 words)

	CS 3304 Programming Assignment 2
		The easiest way to parse this grammar is to use recursive descent parsing, a kind of top-down parsing.
		is a parse tree for the longest suffix of
		An expression tree eliminates the nonterminals from the parse tree and leaves only the evaluation structure of an expression.
	ei.cs.vt.edu /~cs3304sm/program2/program2.html (682 words)

	Debugging and Testing Grammars With Parse Trees and Derivations
		Parse trees record the sequence of rules used to match a particular input sequence.
		They differ from ASTs in that parse trees are sensitive to grammar changes because they are a trace of the rule method call stack.
		Further, ASTs consist entirely of token nodes whereas parse trees have token nodes at the leaves and all internal nonleaf nodes are rule nodes.
	www.antlr.org /article/parse.trees (863 words)

	General SQL Parser: sql engine for various databases
		Change objects in parse tree such as field, table and then regenereate sql on the fly.
		Sql translate between different database dialects is really a challenge work, based on parse tree generated by gsqlparser, it is possible to do this job.
		But frankly speaking, the parse tree is just a place to start, it is your job to achieve this.
	www.sqlparser.com /howto.php (562 words)

	jGuru: What's the difference between a parse tree and an abstract syntax tree (AST)? Why doesn't ANTLR generate trees ...
		A parse tree is a record of the rules (and tokens) used to match some input text whereas a syntax tree records the structure of the input and is insensitive to the grammar that produced it.
		Note that there are an infinite number of grammars for any single language and hence every grammar will result in a different parse tree form for a given input sentence because of all the different intermediate rules.
		An abstract syntax tree is a far superior intermediate form precisely because of this insensitivity and because it highlights the structure of the language not the grammar.
	www.jguru.com /faq/view.jsp?EID=814505 (514 words)

	Tree Construction
		The syntax tree that we create in memory doesn't need to correspond directly to the actual parse tree that the parser creates as it goes.
		Instead we can build up an abstract syntax tree that does simplifications of the parse tree, and may even ignore large parts of the parse if we are only looking to sample a subset of the information in the DSL script.
		Once the parser has made a tree, the next step is to walk this tree and populate the Semantic Model.
	www.martinfowler.com /dslwip/TreeConstruction.html (2456 words)

	The Parse Tree Module
		The parser's principal role is to generate a parse tree.
		The parse tree itself is a lisp-like structure.
		Parse Trees tend to grow quickly, and it becomes quickly hard to debug them by simply traversing the list.
	synopsis.fresco.org /docs/DevGuide/ptree.html (363 words)

	Building Parse Trees
		But often it is the case that one wants, given a string to construct the parse tree(s) for it.
		An easy way to do this is to add an argument to each nonterminal to contain the parse tree, and then add the necessary code to each rule to construct the appropriate tree.
		We've added a second argument and in it constructed the parse tree for the entire expression phrase given the parse trees for the component expression and term phrases.
	www.cs.sunysb.edu /~warren/xsbbook/node28.html (626 words)

	Parse Trees
		While in general it may be difficult to prove a grammar is ambiguous, the demonstration of two distinct parse trees for the same terminal string is sufficient proof that a grammar is ambiguous.
		A parse tree is supposed to display the structure used by a grammar to generate an input string.
		The structure of the parse tree produced by the grammar imparts some meaning on the strings of the language.
	www.cs.rochester.edu /users/faculty/nelson/courses/csc_173/grammars/parsetrees.html (692 words)

	Using a Classifier System to Parse English Text
		The parse tree therefore has one root node, which represents the sentence itself, branching down to the level of the english words themselves.
		Parsing is subproblem in the field of natural language processing (NLP), whose aim is to allow computers to "understand" and generate language as humans do.
		Also, a parse tree is inherently two dimensional- nodes have parents and children as well as siblings, so I had to incorporate some kind of two dimensionality into messages.
	www.cs.princeton.edu /~rswartz/classifier/writeup.html (5355 words)

	Parse tree transformation to functional description
		The analysis modules of SIGNAL identify these in parse tree form, but they need to be converted to to a functional description form for input to generation.
		The conversion process is not trivial, as parse trees lack much of the semantic information needed for generation; this is further complicated by the fact that parse trees often correspond to more than one semantic representation.
		An appropriate FD is an FD that generates the closest lexicalized string (with respect to a tree edit distance function) to the parse tree equivalent.
	www1.cs.columbia.edu /~min/papers/thesis/node117.html (646 words)

	Trees
		Parse trees are an in-memory representation of the input with a structure that conforms to the grammar.
		To start the parse and generate the ast, you must use the ast_parse functions, which are similar to the pt_parse functions.
		Once you have created a tree by calling pt_parse or ast_parse, you have a tree_parse_info which contains the root node of the tree, and now you need to do something with the tree.
	www.boost.org /libs/spirit/doc/trees.html (2332 words)

	PostgreSQL: Documentation: Manuals: PostgreSQL 7.4: The Parser Stage
		The code of the actions (which is actually C code) is used to build up the parse tree.
		The reason for separating raw parsing from semantic analysis is that system catalog lookups can only be done within a transaction, and we do not wish to start a transaction immediately upon receiving a query string.
		The query tree created by the transformation process is structurally similar to the raw parse tree in most places, but it has many differences in detail.
	www.postgresql.org /docs/7.4/static/parser-stage.html (494 words)

	CS321 Spring 2001
		In a parse tree, a distinct record type may be used to represent each alternative of a BNF production rule.
		When traversing a tree, it is convenient to have some way to branch on the type of record and to fetch values from the fields of that kind of record.
		Attach a printout of your parse expression and the parse tree that is returned along with a sketch of the parse tree.
	math.holycross.edu /~mule/labs/SLamWarmup.htm (1228 words)

	What is a Parser ?
		The output of the parser is a parse tree.
		Parsing is the process of matching grammar symbols to elements in the input data, according to the rules of the grammar.
		The resulting parse tree is a mapping of grammar symbols to data elements.
	www.programmar.com /parser.htm (454 words)

	PCLParseTreeNode -- Object Serialization Parse Tree
		Such parse trees are typically used to hold an inmemory format of objects being serialized, or de-serialized.
		The PCL parse tree classes include methods for conveniently reading parse tree's from a text file, and writing them to a parse tree.
		The use of the PCL parse tree was pioneered by the Visual Modeller, and the text file format is currently used to hold all module definitions for the modeller, and to hold the persistant format of models.
	www.pcigeomatics.com /cgi-bin/pcihlp/PCLParseTreeNode (1144 words)

	Parse Trees
		A parse tree is a data structure that records and groups patterns discovered in the input text.
		In this way, you can view the parse tree for the pass that is currently selected in the Ana Tab.
		(Note: If the text has been analyzed with Generate Logs off, then the final parse tree is displayed.) The display shows patterns and groupings identified in the input text, as well as the node variables and their values as parenthesized lists of the form ("variable_name" "value1" "value2"...).
	www.textanalysis.com /parse_trees.htm (199 words)

	GameDev.net - Algorithmic Forays Part 5
		Such trees in the world of parsing and compilation are called expression trees, or parse trees.
		Going from a regex to a parse tree is similar to parsing arithmetic expressions, and going from a parse tree to a NFA will be now demonstrated, using the Thompson's Construction building blocks described in this chapter.
		A parse tree in our case is just a binary tree, since no operation has more than two arguments.
	www.gamedev.net /reference/articles/article2131.asp (1912 words)

	Real Parse Tree, Code Page
		The parse trees that we are using are pointers to a node structure that can itself contain subtrees (additional pointers to other nodes).
		It recursively deallocates all the nodes in the tree.
		CopyTree(t) generates a tree (pointer to struct type node) that is an node-for-node copy of the one passed as its argument.
	orion.math.iastate.edu /danwell/rgp/gpdoc.html (940 words)

	XIDEK: Interpreter Development Kit -- Abstract Syntax Tree Definitions
		An abstract syntax tree is a condensed form of parse tree which omits elements such as parentheses and semicolons, which are syntactically important but have no semantic value.
		When the tree is destroyed, these nodes are deleted even though the tree may not have been completed, as could happen, for instance, if there were a syntax error during creation of the tree.
		When walking a tree, if all nodes are to be dealt with in the same way, it is much easier to do if they are seen as elements in an array.
	www.parsifalsoft.com /examples/xidek/xidek/doc/astdefs.htm (3202 words)

	ckit Overview
		The parse tree datatypes are defined in parse/parse-tree-sig.sml and the abstract syntax types in ast/ast-sig.sml.
		The output of this phase is a data-structure (parse tree) that is a simple "unprocessed" form that closely follows the structure of C's grammar.
		Extensions to the parse tree datatype are supported via a collection of "Ext" constructors in the parse tree datatypes.
	www.smlnj.org /doc/ckit/overview.html (1190 words)

	DifGP Docs
		The intervention to remove the opcode happens only when parse trees are generated, this does not remove the operation from existing parse trees.
		This routine deallocates all the storage used by a tree, recursively traversing the tree and deleting all its nodes.
		This routine returns a pointer to the root node of a parse tree holding the the partial differential with respect to the qth variable of the parse tree pointer to be t.
	orion.math.iastate.edu /danwell/Alli/DifDoc.html (821 words)

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