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<?xml version="1.0" encoding="UTF-8"?>
<!--
xml2text.xsl - transform Bison XML Report into plain text.
Copyright (C) 2007-2015 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Written by Wojciech Polak <polak@gnu.org>.
-->
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:bison="http://www.gnu.org/software/bison/">
<xsl:import href="bison.xsl"/>
<xsl:output method="text" encoding="UTF-8" indent="no"/>
<xsl:template match="/">
<xsl:apply-templates select="bison-xml-report"/>
</xsl:template>
<xsl:template match="bison-xml-report">
<xsl:apply-templates select="grammar" mode="reductions"/>
<xsl:apply-templates select="grammar" mode="useless-in-parser"/>
<xsl:apply-templates select="automaton" mode="conflicts"/>
<xsl:apply-templates select="grammar"/>
<xsl:apply-templates select="automaton"/>
</xsl:template>
<xsl:template match="grammar" mode="reductions">
<xsl:apply-templates select="nonterminals" mode="useless-in-grammar"/>
<xsl:apply-templates select="terminals" mode="unused-in-grammar"/>
<xsl:apply-templates select="rules" mode="useless-in-grammar"/>
</xsl:template>
<xsl:template match="nonterminals" mode="useless-in-grammar">
<xsl:if test="nonterminal[@usefulness='useless-in-grammar']">
<xsl:text>Nonterminals useless in grammar </xsl:text>
<xsl:for-each select="nonterminal[@usefulness='useless-in-grammar']">
<xsl:text> </xsl:text>
<xsl:value-of select="@name"/>
<xsl:text> </xsl:text>
</xsl:for-each>
<xsl:text> </xsl:text>
</xsl:if>
</xsl:template>
<xsl:template match="terminals" mode="unused-in-grammar">
<xsl:if test="terminal[@usefulness='unused-in-grammar']">
<xsl:text>Terminals unused in grammar </xsl:text>
<xsl:for-each select="terminal[@usefulness='unused-in-grammar']">
<xsl:sort select="@symbol-number" data-type="number"/>
<xsl:text> </xsl:text>
<xsl:value-of select="@name"/>
<xsl:text> </xsl:text>
</xsl:for-each>
<xsl:text> </xsl:text>
</xsl:if>
</xsl:template>
<xsl:template match="rules" mode="useless-in-grammar">
<xsl:variable name="set" select="rule[@usefulness='useless-in-grammar']"/>
<xsl:if test="$set">
<xsl:text>Rules useless in grammar </xsl:text>
<xsl:call-template name="style-rule-set">
<xsl:with-param name="rule-set" select="$set"/>
</xsl:call-template>
<xsl:text> </xsl:text>
</xsl:if>
</xsl:template>
<xsl:template match="grammar" mode="useless-in-parser">
<xsl:variable
name="set" select="rules/rule[@usefulness='useless-in-parser']"
/>
<xsl:if test="$set">
<xsl:text>Rules useless in parser due to conflicts </xsl:text>
<xsl:call-template name="style-rule-set">
<xsl:with-param name="rule-set" select="$set"/>
</xsl:call-template>
<xsl:text> </xsl:text>
</xsl:if>
</xsl:template>
<xsl:template match="grammar">
<xsl:text>Grammar </xsl:text>
<xsl:call-template name="style-rule-set">
<xsl:with-param
name="rule-set" select="rules/rule[@usefulness!='useless-in-grammar']"
/>
</xsl:call-template>
<xsl:text> </xsl:text>
<xsl:apply-templates select="terminals"/>
<xsl:apply-templates select="nonterminals"/>
</xsl:template>
<xsl:template name="style-rule-set">
<xsl:param name="rule-set"/>
<xsl:for-each select="$rule-set">
<xsl:apply-templates select=".">
<xsl:with-param name="pad" select="'3'"/>
<xsl:with-param name="prev-lhs">
<xsl:if test="position()>1">
<xsl:variable name="position" select="position()"/>
<xsl:value-of select="$rule-set[$position - 1]/lhs"/>
</xsl:if>
</xsl:with-param>
</xsl:apply-templates>
</xsl:for-each>
</xsl:template>
<xsl:template match="grammar/terminals">
<xsl:text>Terminals, with rules where they appear </xsl:text>
<xsl:apply-templates select="terminal"/>
<xsl:text> </xsl:text>
</xsl:template>
<xsl:template match="grammar/nonterminals">
<xsl:text>Nonterminals, with rules where they appear </xsl:text>
<xsl:apply-templates select="nonterminal[@usefulness!='useless-in-grammar']"/>
</xsl:template>
<xsl:template match="terminal">
<xsl:value-of select="@name"/>
<xsl:call-template name="line-wrap">
<xsl:with-param name="first-line-length">
<xsl:choose>
<xsl:when test="string-length(@name) > 66">0</xsl:when>
<xsl:otherwise>
<xsl:value-of select="66 - string-length(@name)" />
</xsl:otherwise>
</xsl:choose>
</xsl:with-param>
<xsl:with-param name="line-length" select="66" />
<xsl:with-param name="text">
<xsl:value-of select="concat(' (', @token-number, ')')"/>
<xsl:for-each select="key('bison:ruleByRhs', @name)">
<xsl:value-of select="concat(' ', @number)"/>
</xsl:for-each>
</xsl:with-param>
</xsl:call-template>
</xsl:template>
<xsl:template match="nonterminal">
<xsl:value-of select="@name"/>
<xsl:value-of select="concat(' (', @symbol-number, ')')"/>
<xsl:text> </xsl:text>
<xsl:variable name="output">
<xsl:call-template name="line-wrap">
<xsl:with-param name="line-length" select="66" />
<xsl:with-param name="text">
<xsl:text> </xsl:text>
<xsl:if test="key('bison:ruleByLhs', @name)">
<xsl:text>on@left:</xsl:text>
<xsl:for-each select="key('bison:ruleByLhs', @name)">
<xsl:value-of select="concat(' ', @number)"/>
</xsl:for-each>
</xsl:if>
<xsl:if test="key('bison:ruleByRhs', @name)">
<xsl:if test="key('bison:ruleByLhs', @name)">
<xsl:text>, </xsl:text>
</xsl:if>
<xsl:text>on@right:</xsl:text>
<xsl:for-each select="key('bison:ruleByRhs', @name)">
<xsl:value-of select="concat(' ', @number)"/>
</xsl:for-each>
</xsl:if>
</xsl:with-param>
</xsl:call-template>
</xsl:variable>
<xsl:value-of select="translate($output, '@', ' ')" />
</xsl:template>
<xsl:template match="automaton" mode="conflicts">
<xsl:variable name="conflict-report">
<xsl:apply-templates select="state" mode="conflicts"/>
</xsl:variable>
<xsl:if test="string-length($conflict-report) != 0">
<xsl:value-of select="$conflict-report"/>
<xsl:text> </xsl:text>
</xsl:if>
</xsl:template>
<xsl:template match="state" mode="conflicts">
<xsl:variable name="conflict-counts">
<xsl:apply-templates select="." mode="bison:count-conflicts" />
</xsl:variable>
<xsl:variable
name="sr-count" select="substring-before($conflict-counts, ',')"
/>
<xsl:variable
name="rr-count" select="substring-after($conflict-counts, ',')"
/>
<xsl:if test="$sr-count > 0 or $rr-count > 0">
<xsl:value-of select="concat('State ', @number, ' conflicts:')"/>
<xsl:if test="$sr-count > 0">
<xsl:value-of select="concat(' ', $sr-count, ' shift/reduce')"/>
<xsl:if test="$rr-count > 0">
<xsl:value-of select="(',')"/>
</xsl:if>
</xsl:if>
<xsl:if test="$rr-count > 0">
<xsl:value-of select="concat(' ', $rr-count, ' reduce/reduce')"/>
</xsl:if>
<xsl:value-of select="' '"/>
</xsl:if>
</xsl:template>
<xsl:template match="automaton">
<xsl:apply-templates select="state">
<xsl:with-param name="pad" select="'3'"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="automaton/state">
<xsl:param name="pad"/>
<xsl:text> </xsl:text>
<xsl:text>State </xsl:text>
<xsl:value-of select="@number"/>
<xsl:text> </xsl:text>
<xsl:apply-templates select="itemset/item">
<xsl:with-param name="pad" select="$pad"/>
</xsl:apply-templates>
<xsl:apply-templates select="actions/transitions">
<xsl:with-param name="type" select="'shift'"/>
</xsl:apply-templates>
<xsl:apply-templates select="actions/errors"/>
<xsl:apply-templates select="actions/reductions"/>
<xsl:apply-templates select="actions/transitions">
<xsl:with-param name="type" select="'goto'"/>
</xsl:apply-templates>
<xsl:apply-templates select="solved-conflicts"/>
</xsl:template>
<xsl:template match="actions/transitions">
<xsl:param name="type"/>
<xsl:if test="transition[@type = $type]">
<xsl:text> </xsl:text>
<xsl:apply-templates select="transition[@type = $type]">
<xsl:with-param name="pad">
<xsl:call-template name="max-width-symbol">
<xsl:with-param name="node" select="transition[@type = $type]"/>
</xsl:call-template>
</xsl:with-param>
</xsl:apply-templates>
</xsl:if>
</xsl:template>
<xsl:template match="actions/errors">
<xsl:if test="error">
<xsl:text> </xsl:text>
<xsl:apply-templates select="error">
<xsl:with-param name="pad">
<xsl:call-template name="max-width-symbol">
<xsl:with-param name="node" select="error"/>
</xsl:call-template>
</xsl:with-param>
</xsl:apply-templates>
</xsl:if>
</xsl:template>
<xsl:template match="actions/reductions">
<xsl:if test="reduction">
<xsl:text> </xsl:text>
<xsl:apply-templates select="reduction">
<xsl:with-param name="pad">
<xsl:call-template name="max-width-symbol">
<xsl:with-param name="node" select="reduction"/>
</xsl:call-template>
</xsl:with-param>
</xsl:apply-templates>
</xsl:if>
</xsl:template>
<xsl:template match="item">
<xsl:param name="pad"/>
<xsl:param name="prev-rule-number"
select="preceding-sibling::item[1]/@rule-number"/>
<xsl:apply-templates
select="key('bison:ruleByNumber', current()/@rule-number)"
>
<xsl:with-param name="itemset" select="'true'"/>
<xsl:with-param name="pad" select="$pad"/>
<xsl:with-param
name="prev-lhs"
select="key('bison:ruleByNumber', $prev-rule-number)/lhs[text()]"
/>
<xsl:with-param name="point" select="@point"/>
<xsl:with-param name="lookaheads">
<xsl:apply-templates select="lookaheads"/>
</xsl:with-param>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="rule">
<xsl:param name="itemset"/>
<xsl:param name="pad"/>
<xsl:param name="prev-lhs"/>
<xsl:param name="point"/>
<xsl:param name="lookaheads"/>
<xsl:if test="$itemset != 'true' and not($prev-lhs = lhs[text()])">
<xsl:text> </xsl:text>
</xsl:if>
<xsl:text> </xsl:text>
<xsl:call-template name="lpad">
<xsl:with-param name="str" select="string(@number)"/>
<xsl:with-param name="pad" select="number($pad)"/>
</xsl:call-template>
<xsl:text> </xsl:text>
<!-- LHS -->
<xsl:choose>
<xsl:when test="$itemset != 'true' and $prev-lhs = lhs[text()]">
<xsl:call-template name="lpad">
<xsl:with-param name="str" select="'|'"/>
<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
</xsl:call-template>
</xsl:when>
<xsl:when test="$itemset = 'true' and $prev-lhs = lhs[text()]">
<xsl:call-template name="lpad">
<xsl:with-param name="str" select="'|'"/>
<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="lhs"/>
<xsl:text>:</xsl:text>
</xsl:otherwise>
</xsl:choose>
<!-- RHS -->
<xsl:for-each select="rhs/*">
<xsl:if test="position() = $point + 1">
<xsl:text> .</xsl:text>
</xsl:if>
<xsl:apply-templates select="."/>
<xsl:if test="position() = last() and position() = $point">
<xsl:text> .</xsl:text>
</xsl:if>
</xsl:for-each>
<xsl:if test="$lookaheads">
<xsl:value-of select="$lookaheads"/>
</xsl:if>
<xsl:text> </xsl:text>
</xsl:template>
<xsl:template match="symbol">
<xsl:text> </xsl:text>
<xsl:value-of select="."/>
</xsl:template>
<xsl:template match="empty">
<xsl:text> %empty</xsl:text>
</xsl:template>
<xsl:template match="lookaheads">
<xsl:text> [</xsl:text>
<xsl:apply-templates select="symbol"/>
<xsl:text>]</xsl:text>
</xsl:template>
<xsl:template match="lookaheads/symbol">
<xsl:value-of select="."/>
<xsl:if test="position() != last()">
<xsl:text>, </xsl:text>
</xsl:if>
</xsl:template>
<xsl:template match="transition">
<xsl:param name="pad"/>
<xsl:text> </xsl:text>
<xsl:call-template name="rpad">
<xsl:with-param name="str" select="string(@symbol)"/>
<xsl:with-param name="pad" select="number($pad) + 2"/>
</xsl:call-template>
<xsl:choose>
<xsl:when test="@type = 'shift'">
<xsl:text>shift, and go to state </xsl:text>
<xsl:value-of select="@state"/>
</xsl:when>
<xsl:when test="@type = 'goto'">
<xsl:text>go to state </xsl:text>
<xsl:value-of select="@state"/>
</xsl:when>
</xsl:choose>
<xsl:text> </xsl:text>
</xsl:template>
<xsl:template match="error">
<xsl:param name="pad"/>
<xsl:text> </xsl:text>
<xsl:call-template name="rpad">
<xsl:with-param name="str" select="string(@symbol)"/>
<xsl:with-param name="pad" select="number($pad) + 2"/>
</xsl:call-template>
<xsl:text>error</xsl:text>
<xsl:text> (</xsl:text>
<xsl:value-of select="text()"/>
<xsl:text>)</xsl:text>
<xsl:text> </xsl:text>
</xsl:template>
<xsl:template match="reduction">
<xsl:param name="pad"/>
<xsl:text> </xsl:text>
<xsl:call-template name="rpad">
<xsl:with-param name="str" select="string(@symbol)"/>
<xsl:with-param name="pad" select="number($pad) + 2"/>
</xsl:call-template>
<xsl:if test="@enabled = 'false'">
<xsl:text>[</xsl:text>
</xsl:if>
<xsl:choose>
<xsl:when test="@rule = 'accept'">
<xsl:text>accept</xsl:text>
</xsl:when>
<xsl:otherwise>
<xsl:text>reduce using rule </xsl:text>
<xsl:value-of select="@rule"/>
<xsl:text> (</xsl:text>
<xsl:value-of
select="key('bison:ruleByNumber', current()/@rule)/lhs[text()]"/>
<xsl:text>)</xsl:text>
</xsl:otherwise>
</xsl:choose>
<xsl:if test="@enabled = 'false'">
<xsl:text>]</xsl:text>
</xsl:if>
<xsl:text> </xsl:text>
</xsl:template>
<xsl:template match="solved-conflicts">
<xsl:if test="resolution">
<xsl:text> </xsl:text>
<xsl:apply-templates select="resolution"/>
</xsl:if>
</xsl:template>
<xsl:template match="resolution">
<xsl:text> Conflict between rule </xsl:text>
<xsl:value-of select="@rule"/>
<xsl:text> and token </xsl:text>
<xsl:value-of select="@symbol"/>
<xsl:text> resolved as </xsl:text>
<xsl:if test="@type = 'error'">
<xsl:text>an </xsl:text>
</xsl:if>
<xsl:value-of select="@type"/>
<xsl:text> (</xsl:text>
<xsl:value-of select="."/>
<xsl:text>). </xsl:text>
</xsl:template>
<xsl:template name="max-width-symbol">
<xsl:param name="node"/>
<xsl:variable name="longest">
<xsl:for-each select="$node">
<xsl:sort data-type="number" select="string-length(@symbol)"
order="descending"/>
<xsl:if test="position() = 1">
<xsl:value-of select="string-length(@symbol)"/>
</xsl:if>
</xsl:for-each>
</xsl:variable>
<xsl:value-of select="$longest"/>
</xsl:template>
<xsl:template name="lpad">
<xsl:param name="str" select="''"/>
<xsl:param name="pad" select="0"/>
<xsl:variable name="diff" select="$pad - string-length($str)" />
<xsl:choose>
<xsl:when test="$diff < 0">
<xsl:value-of select="$str"/>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="space">
<xsl:with-param name="repeat" select="$diff"/>
</xsl:call-template>
<xsl:value-of select="$str"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template name="rpad">
<xsl:param name="str" select="''"/>
<xsl:param name="pad" select="0"/>
<xsl:variable name="diff" select="$pad - string-length($str)"/>
<xsl:choose>
<xsl:when test="$diff < 0">
<xsl:value-of select="$str"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$str"/>
<xsl:call-template name="space">
<xsl:with-param name="repeat" select="$diff"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template name="line-wrap">
<xsl:param name="line-length"/> <!-- required -->
<xsl:param name="first-line-length" select="$line-length"/>
<xsl:param name="text"/> <!-- required -->
<xsl:choose>
<xsl:when test="normalize-space($text) = ''" />
<xsl:when test="string-length($text) <= $first-line-length">
<xsl:value-of select="concat($text, ' ')" />
</xsl:when>
<xsl:otherwise>
<xsl:variable name="break-pos">
<xsl:call-template name="ws-search">
<xsl:with-param name="text" select="$text" />
<xsl:with-param name="start" select="$first-line-length+1" />
</xsl:call-template>
</xsl:variable>
<xsl:value-of select="substring($text, 1, $break-pos - 1)" />
<xsl:text> </xsl:text>
<xsl:call-template name="line-wrap">
<xsl:with-param name="line-length" select="$line-length" />
<xsl:with-param
name="text" select="concat(' ', substring($text, $break-pos+1))"
/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template name="ws-search">
<xsl:param name="text"/> <!-- required -->
<xsl:param name="start"/> <!-- required -->
<xsl:variable name="search-text" select="substring($text, $start)" />
<xsl:choose>
<xsl:when test="not(contains($search-text, ' '))">
<xsl:value-of select="string-length($text)+1" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of
select="$start + string-length(substring-before($search-text, ' '))"
/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>