[llvm-commits] [llvm] r48966 - in /llvm/trunk/docs/tutorial: OCamlLangImpl1.html OCamlLangImpl2.html

[Erick Tryzelaar]

Author: erickt
Date: Sun Mar 30 14:14:31 2008
New Revision: 48966

URL: http://llvm.org/viewvc/llvm-project?rev=48966&view=rev
Log:
Fix some documentation for the tutorial.

Modified:
    llvm/trunk/docs/tutorial/OCamlLangImpl1.html
    llvm/trunk/docs/tutorial/OCamlLangImpl2.html

Modified: llvm/trunk/docs/tutorial/OCamlLangImpl1.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/tutorial/OCamlLangImpl1.html?rev=48966&r1=48965&r2=48966&view=diff

==============================================================================
--- llvm/trunk/docs/tutorial/OCamlLangImpl1.html (original)
+++ llvm/trunk/docs/tutorial/OCamlLangImpl1.html Sun Mar 30 14:14:31 2008
@@ -219,15 +219,15 @@
 </div>
 
 <p>Each token returned by our lexer will be one of the token variant values.
-An unknown character like '+' will be returned as <tt>Kwd '+'</tt>.  If the
-curr token is an identifier, the value will be <tt>Ident s</tt>.  If the
-current token is a numeric literal (like 1.0), the value will be
-<tt>Number 1.0</tt>.
+An unknown character like '+' will be returned as <tt>Token.Kwd '+'</tt>.  If
+the curr token is an identifier, the value will be <tt>Token.Ident s</tt>.  If
+the current token is a numeric literal (like 1.0), the value will be
+<tt>Token.Number 1.0</tt>.
 </p>
 
 <p>The actual implementation of the lexer is a collection of functions driven
-by a function named <tt>lex</tt>.  The <tt>lex</tt> function is called to
-return the next token from standard input.  We will use
+by a function named <tt>Lexer.lex</tt>.  The <tt>Lexer.lex</tt> function is
+called to return the next token from standard input.  We will use
 <a href="http://caml.inria.fr/pub/docs/manual-camlp4/index.html">Camlp4</a>
 to simplify the tokenization of the standard input.  Its definition starts
 as:</p>
@@ -245,13 +245,13 @@
 </div>
 
 <p>
-<tt>lex</tt> works by recursing over a <tt>char Stream.t</tt> to read
+<tt>Lexer.lex</tt> works by recursing over a <tt>char Stream.t</tt> to read
 characters one at a time from the standard input.  It eats them as it recognizes
-them and stores them in in a <tt>token</tt> variant.  The first thing that it
-has to do is ignore whitespace between tokens.  This is accomplished with the
+them and stores them in in a <tt>Token.token</tt> variant.  The first thing that
+it has to do is ignore whitespace between tokens.  This is accomplished with the
 recursive call above.</p>
 
-<p>The next thing <tt>lex</tt> needs to do is recognize identifiers and
+<p>The next thing <tt>Lexer.lex</tt> needs to do is recognize identifiers and
 specific keywords like "def".  Kaleidoscope does this with this a pattern match
 and a helper function.<p>
 
@@ -300,8 +300,8 @@
 
 <p>This is all pretty straight-forward code for processing input.  When reading
 a numeric value from input, we use the ocaml <tt>float_of_string</tt> function
-to convert it to a numeric value that we store in <tt>NumVal</tt>.  Note that
-this isn't doing sufficient error checking: it will raise <tt>Failure</tt>
+to convert it to a numeric value that we store in <tt>Token.Number</tt>.  Note
+that this isn't doing sufficient error checking: it will raise <tt>Failure</tt>
 if the string "1.23.45.67".  Feel free to extend it :).  Next we handle
 comments:
 </p>

Modified: llvm/trunk/docs/tutorial/OCamlLangImpl2.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/tutorial/OCamlLangImpl2.html?rev=48966&r1=48965&r2=48966&view=diff

==============================================================================
--- llvm/trunk/docs/tutorial/OCamlLangImpl2.html (original)
+++ llvm/trunk/docs/tutorial/OCamlLangImpl2.html Sun Mar 30 14:14:31 2008
@@ -240,13 +240,13 @@
 <tt>Stream.Error "parse error"</tt> will be raised.</p>
 
 <p>2) Another interesting aspect of this function is that it uses recursion by
-calling <tt>parse_primary</tt> (we will soon see that <tt>parse_primary</tt> can
-call <tt>parse_primary</tt>).  This is powerful because it allows us to handle
-recursive grammars, and keeps each production very simple.  Note that
-parentheses do not cause construction of AST nodes themselves.  While we could
-do it this way, the most important role of parentheses are to guide the parser
-and provide grouping.  Once the parser constructs the AST, parentheses are not
-needed.</p>
+calling <tt>Parser.parse_primary</tt> (we will soon see that
+<tt>Parser.parse_primary</tt> can call <tt>Parser.parse_primary</tt>).  This is
+powerful because it allows us to handle recursive grammars, and keeps each
+production very simple.  Note that parentheses do not cause construction of AST
+nodes themselves.  While we could do it this way, the most important role of
+parentheses are to guide the parser and provide grouping.  Once the parser
+constructs the AST, parentheses are not needed.</p>
 
 <p>The next simple production is for handling variable references and function
 calls:</p>
@@ -345,12 +345,12 @@
 
 <p>For the basic form of Kaleidoscope, we will only support 4 binary operators
 (this can obviously be extended by you, our brave and intrepid reader).  The
-<tt>precedence</tt> function returns the precedence for the current token,
-or -1 if the token is not a binary operator.  Having a <tt>Hashtbl.t</tt> makes
-it easy to add new operators and makes it clear that the algorithm doesn't
+<tt>Parser.precedence</tt> function returns the precedence for the current
+token, or -1 if the token is not a binary operator.  Having a <tt>Hashtbl.t</tt>
+makes it easy to add new operators and makes it clear that the algorithm doesn't
 depend on the specific operators involved, but it would be easy enough to
 eliminate the <tt>Hashtbl.t</tt> and do the comparisons in the
-<tt>precedence</tt> function.  (Or just use a fixed-size array).</p>
+<tt>Parser.precedence</tt> function.  (Or just use a fixed-size array).</p>
 
 <p>With the helper above defined, we can now start parsing binary expressions.
 The basic idea of operator precedence parsing is to break down an expression
@@ -376,19 +376,19 @@
 </pre>
 </div>
 
-<p><tt>parse_bin_rhs</tt> is the function that parses the sequence of pairs for
-us.  It takes a precedence and a pointer to an expression for the part that has been
-parsed so far.   Note that "x" is a perfectly valid expression: As such, "binoprhs" is
-allowed to be empty, in which case it returns the expression that is passed into
-it. In our example above, the code passes the expression for "a" into
-<tt>ParseBinOpRHS</tt> and the current token is "+".</p>
-
-<p>The precedence value passed into <tt>parse_bin_rhs</tt> indicates the <em>
-minimal operator precedence</em> that the function is allowed to eat.  For
-example, if the current pair stream is [+, x] and <tt>parse_bin_rhs</tt> is
-passed in a precedence of 40, it will not consume any tokens (because the
-precedence of '+' is only 20).  With this in mind, <tt>parse_bin_rhs</tt> starts
-with:</p>
+<p><tt>Parser.parse_bin_rhs</tt> is the function that parses the sequence of
+pairs for us.  It takes a precedence and a pointer to an expression for the part
+that has been parsed so far.   Note that "x" is a perfectly valid expression: As
+such, "binoprhs" is allowed to be empty, in which case it returns the expression
+that is passed into it. In our example above, the code passes the expression for
+"a" into <tt>Parser.parse_bin_rhs</tt> and the current token is "+".</p>
+
+<p>The precedence value passed into <tt>Parser.parse_bin_rhs</tt> indicates the
+<em>minimal operator precedence</em> that the function is allowed to eat.  For
+example, if the current pair stream is [+, x] and <tt>Parser.parse_bin_rhs</tt>
+is passed in a precedence of 40, it will not consume any tokens (because the
+precedence of '+' is only 20).  With this in mind, <tt>Parser.parse_bin_rhs</tt>
+starts with:</p>
 
 <div class="doc_code">
 <pre>
@@ -497,10 +497,10 @@
 has higher precedence than the binop we are currently parsing.  As such, we know
 that any sequence of pairs whose operators are all higher precedence than "+"
 should be parsed together and returned as "RHS".  To do this, we recursively
-invoke the <tt>parse_bin_rhs</tt> function specifying "token_prec+1" as the
-minimum precedence required for it to continue.  In our example above, this will
-cause it to return the AST node for "(c+d)*e*f" as RHS, which is then set as the
-RHS of the '+' expression.</p>
+invoke the <tt>Parser.parse_bin_rhs</tt> function specifying "token_prec+1" as
+the minimum precedence required for it to continue.  In our example above, this
+will cause it to return the AST node for "(c+d)*e*f" as RHS, which is then set
+as the RHS of the '+' expression.</p>
 
 <p>Finally, on the next iteration of the while loop, the "+g" piece is parsed
 and added to the AST.  With this little bit of code (14 non-trivial lines), we
@@ -705,7 +705,7 @@
 # Compile
 ocamlbuild toy.byte
 # Run
-./toy
+./toy.byte
 </pre>
 </div>