fixes #2559
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6 changed files with 26 additions and 18 deletions
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@ -4,12 +4,12 @@ Short description of Nim's modules
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============== ==========================================================
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Module Description
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============== ==========================================================
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nim main module: parses the command line and calls
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nim main module: parses the command line and calls
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``main.MainCommand``
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main implements the top-level command dispatching
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nimconf implements the config file reader
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syntaxes dispatcher for the different parsers and filters
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filter_tmpl standard template filter (``#! stdtempl``)
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filter_tmpl standard template filter (``#? stdtempl``)
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lexbase buffer handling of the lexical analyser
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lexer lexical analyser
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parser Nim's parser
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@ -8,9 +8,9 @@ A `Source Code Filter` transforms the input character stream to an in-memory
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output stream before parsing. A filter can be used to provide templating
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systems or preprocessors.
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To use a filter for a source file the *shebang* notation is used::
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To use a filter for a source file the ``#?`` notation is used::
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#! stdtmpl(subsChar = '$', metaChar = '#')
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#? stdtmpl(subsChar = '$', metaChar = '#')
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#proc generateXML(name, age: string): string =
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# result = ""
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<xml>
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@ -20,7 +20,8 @@ To use a filter for a source file the *shebang* notation is used::
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As the example shows, passing arguments to a filter can be done
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just like an ordinary procedure call with named or positional arguments. The
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available parameters depend on the invoked filter.
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available parameters depend on the invoked filter. Before version 0.12.0 of
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the language ``#!`` was used instead of ``#?``.
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Pipe operator
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@ -28,7 +29,7 @@ Pipe operator
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Filters can be combined with the ``|`` pipe operator::
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#! strip(startswith="<") | stdtmpl
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#? strip(startswith="<") | stdtmpl
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#proc generateXML(name, age: string): string =
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# result = ""
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<xml>
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@ -104,7 +105,7 @@ Parameters and their defaults:
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Example::
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#! stdtmpl | standard
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#? stdtmpl | standard
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#proc generateHTMLPage(title, currentTab, content: string,
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# tabs: openArray[string]): string =
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# result = ""
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@ -172,7 +173,7 @@ produces ``$``.
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The template engine is quite flexible. It is easy to produce a procedure that
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writes the template code directly to a file::
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#! stdtmpl(emit="f.write") | standard
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#? stdtmpl(emit="f.write") | standard
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#proc writeHTMLPage(f: File, title, currentTab, content: string,
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# tabs: openArray[string]) =
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<head><title>$title</title></head>
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@ -68,13 +68,13 @@ Strong spaces
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-------------
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The number of spaces preceding a non-keyword operator affects precedence
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if the experimental parser directive ``#!strongSpaces`` is used. Indentation
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if the experimental parser directive ``#?strongSpaces`` is used. Indentation
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is not used to determine the number of spaces. If 2 or more operators have the
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same number of preceding spaces the precedence table applies, so ``1 + 3 * 4``
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is still parsed as ``1 + (3 * 4)``, but ``1+3 * 4`` is parsed as ``(1+3) * 4``:
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.. code-block:: nim
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#! strongSpaces
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#? strongSpaces
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if foo+4 * 4 == 8 and b&c | 9 ++
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bar:
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echo ""
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@ -86,7 +86,7 @@ Furthermore whether an operator is used a prefix operator is affected by the
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number of spaces:
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.. code-block:: nim
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#! strongSpaces
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#? strongSpaces
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echo $foo
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# is parsed as
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echo($foo)
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@ -95,7 +95,7 @@ This also affects whether ``[]``, ``{}``, ``()`` are parsed as constructors
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or as accessors:
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.. code-block:: nim
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#! strongSpaces
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#? strongSpaces
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echo (1,2)
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# is parsed as
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echo((1,2))
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