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synced 2026-03-09 12:23:04 +00:00
examples: d: duplicate the example as "simple" and "calc"
* examples/d/Makefile, examples/d/calc.d, examples/d/calc.test, examples/d/calc/local.mk: Move into... * examples/d/calc, examples/d/simple: these new directories.
This commit is contained in:
Adela Vais
committed by
Akim Demaille
Akim Demaille
parent
f3bcb3de0e
commit
8032dde383
@@ -5,9 +5,12 @@ This directory contains examples of Bison grammar files in D.
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You can run `make` to compile these examples. And `make clean` to tidy
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afterwards.
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## d/calc.y
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## d/simple.y
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The usual calculator.
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## d/calc.y
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A richer implementation of the calculator.
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<!---
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Local Variables:
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36
examples/d/calc/local.mk
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36
examples/d/calc/local.mk
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@@ -0,0 +1,36 @@
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## Copyright (C) 2018-2020 Free Software Foundation, Inc.
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##
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## This program is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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calcddir = $(docdir)/%D%
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## ------ ##
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## Calc. ##
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## ------ ##
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if ENABLE_D
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check_SCRIPTS += %D%/calc
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TESTS += %D%/calc.test
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endif
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EXTRA_DIST += %D%/calc.test
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%D%/calc.d: %D%/calc.y $(dependencies)
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$(AM_V_GEN)$(MKDIR_P) %D%
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$(AM_V_at)$(BISON) -o $@ $(srcdir)/%D%/calc.y
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%D%/calc: %D%/calc.d
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$(AM_V_GEN) $(DC) $(DCFLAGS) -of$@ %D%/calc.d
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dist_calcd_DATA = %D%/calc.y %D%/Makefile
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CLEANFILES += %D%/calc %D%/calc.[do]
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@@ -14,23 +14,7 @@
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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ddir = $(docdir)/%D%
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dist_d_DATA = %D%/README.md
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## ------ ##
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## Calc. ##
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## ------ ##
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if ENABLE_D
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check_SCRIPTS += %D%/calc
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TESTS += %D%/calc.test
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endif
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EXTRA_DIST += %D%/calc.test
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%D%/calc.d: %D%/calc.y $(dependencies)
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$(AM_V_GEN)$(MKDIR_P) %D%
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$(AM_V_at)$(BISON) -o $@ $(srcdir)/%D%/calc.y
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%D%/calc: %D%/calc.d
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$(AM_V_GEN) $(DC) $(DCFLAGS) -of$@ %D%/calc.d
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dist_d_DATA = %D%/calc.y %D%/Makefile %D%/README.md
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CLEANFILES += %D%/calc %D%/calc.[do]
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include %D%/calc/local.mk
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include %D%/simple/local.mk
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25
examples/d/simple/Makefile
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25
examples/d/simple/Makefile
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@@ -0,0 +1,25 @@
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# This Makefile is designed to be simple and readable. It does not
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# aim at portability. It requires GNU Make.
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BISON = bison
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DC = dmd
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XSLTPROC = xsltproc
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all: calc
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%.d %.xml %.gv: %.y
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$(BISON) $(BISONFLAGS) --xml --graph=$*.gv -o $*.d $<
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%: %.d
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$(DC) $(DCFLAGS) $<
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run: calc
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@echo "Type arithmetic expressions. Quit with ctrl-d."
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./$<
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html: calc.html
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%.html: %.xml
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$(XSLTPROC) $(XSLTPROCFLAGS) -o $@ $$($(BISON) --print-datadir)/xslt/xml2xhtml.xsl $<
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clean:
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rm -f calc calc.d calc.xml calc.gv calc.html *.o
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36
examples/d/simple/calc.test
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36
examples/d/simple/calc.test
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@@ -0,0 +1,36 @@
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#! /bin/sh
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# Copyright (C) 2018-2020 Free Software Foundation, Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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cat >input <<EOF
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1 + 2 * 3
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EOF
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run 0 7
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cat >input <<EOF
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+1 + +2 * +3
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EOF
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run 0 7
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cat >input <<EOF
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-1 + -2 * -3
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EOF
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run 0 5
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cat >input <<EOF
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1 + 2 * * 3
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EOF
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run 1 "err: syntax error, unexpected *, expecting + or - or ( or number"
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156
examples/d/simple/calc.y
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156
examples/d/simple/calc.y
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@@ -0,0 +1,156 @@
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/* Parser and scanner for calc in D. -*- D -*-
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Copyright (C) 2018-2020 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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%language "D"
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%define api.parser.class {Calc}
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%define parse.error verbose
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%union {
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int ival;
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}
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/* Bison Declarations */
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%token EQ "="
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PLUS "+"
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MINUS "-"
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STAR "*"
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SLASH "/"
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LPAR "("
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RPAR ")"
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EOL "end of line"
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%token <ival> NUM "number"
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%type <ival> exp
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%left "-" "+"
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%left "*" "/"
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%precedence UNARY /* unary operators */
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/* Grammar follows */
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%%
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input:
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line
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| input line
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;
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line:
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EOL
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| exp EOL { writeln ($exp); }
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| error EOL
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;
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exp:
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NUM { $$ = $1; }
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| exp "+" exp { $$ = $1 + $3; }
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| exp "-" exp { $$ = $1 - $3; }
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| exp "*" exp { $$ = $1 * $3; }
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| exp "/" exp { $$ = $1 / $3; }
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| "+" exp %prec UNARY { $$ = $2; }
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| "-" exp %prec UNARY { $$ = -$2; }
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| "(" exp ")" { $$ = $2; }
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;
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%%
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import std.range.primitives;
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import std.stdio;
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auto calcLexer(R)(R range)
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if (isInputRange!R && is (ElementType!R : dchar))
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{
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return new CalcLexer!R(range);
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}
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auto calcLexer (File f)
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{
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import std.algorithm : map, joiner;
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import std.utf : byDchar;
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return f.byChunk(1024) // avoid making a syscall roundtrip per char
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.map!(chunk => cast(char[]) chunk) // because byChunk returns ubyte[]
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.joiner // combine chunks into a single virtual range of char
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.calcLexer; // forward to other overload
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}
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class CalcLexer(R) : Lexer
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if (isInputRange!R && is (ElementType!R : dchar))
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{
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R input;
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this(R r) { input = r; }
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// Should be a local in main, shared with %parse-param.
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int exit_status = 0;
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public void yyerror (string s)
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{
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exit_status = 1;
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stderr.writeln (s);
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}
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YYSemanticType semanticVal_;
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public final @property YYSemanticType semanticVal ()
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{
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return semanticVal_;
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}
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int yylex ()
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{
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import std.uni : isWhite, isNumber;
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// Skip initial spaces
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while (!input.empty && input.front != '\n' && isWhite (input.front))
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input.popFront;
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if (input.empty)
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return TokenKind.YYEOF;
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// Numbers.
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if (input.front.isNumber)
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{
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import std.conv : parse;
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semanticVal_.ival = input.parse!int;
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return TokenKind.NUM;
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}
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// Individual characters
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auto ch = input.front;
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input.popFront;
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switch (ch)
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{
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case '=': return TokenKind.EQ;
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case '+': return TokenKind.PLUS;
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case '-': return TokenKind.MINUS;
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case '*': return TokenKind.STAR;
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case '/': return TokenKind.SLASH;
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case '(': return TokenKind.LPAR;
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case ')': return TokenKind.RPAR;
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case '\n': return TokenKind.EOL;
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default: assert(0);
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}
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}
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}
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int main ()
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{
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auto l = calcLexer (stdin);
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auto p = new Calc (l);
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p.parse ();
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return l.exit_status;
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}
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36
examples/d/simple/local.mk
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36
examples/d/simple/local.mk
Normal file
@@ -0,0 +1,36 @@
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## Copyright (C) 2018-2020 Free Software Foundation, Inc.
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##
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## This program is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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simpleddir = $(docdir)/%D%
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## ------ ##
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## Calc. ##
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## ------ ##
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if ENABLE_D
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check_SCRIPTS += %D%/calc
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TESTS += %D%/calc.test
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endif
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EXTRA_DIST += %D%/calc.test
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%D%/calc.d: %D%/calc.y $(dependencies)
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$(AM_V_GEN)$(MKDIR_P) %D%
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$(AM_V_at)$(BISON) -o $@ $(srcdir)/%D%/calc.y
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%D%/calc: %D%/calc.d
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$(AM_V_GEN) $(DC) $(DCFLAGS) -of$@ %D%/calc.d
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dist_simpled_DATA = %D%/calc.y %D%/Makefile
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CLEANFILES += %D%/calc %D%/calc.[do]
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