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7bfff37f01
Add an example to demonstrate the use of push parser. I'm pleasantly surprised: parse.error=detailed works like a charm with push parsers. * examples/c/local.mk, examples/c/pushcalc/Makefile * examples/c/pushcalc/README.md, examples/c/pushcalc/calc.test, * examples/c/pushcalc/calc.y, examples/c/pushcalc/local.mk: New.
40 lines
1.3 KiB
Markdown
40 lines
1.3 KiB
Markdown
# pushcalc - push parser with Bison
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This directory contains pushcalc, the traditional calculator, implemented as
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a push parser.
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Traditionally Bison is used to create so called "pull parsers": the user
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invokes the parser once, which repeatedly calls (pulls) the scanner until
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the input is drained.
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This example demonstrates the "push parsers": the user calls scanner to
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fetch the next token, passes (pushes) it to the parser, and repeats the
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operation until the input is drained.
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This example is a straightforward conversion of the 'calc' example to the
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push-parser model.
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<!---
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Local Variables:
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fill-column: 76
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ispell-dictionary: "american"
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End:
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Copyright (C) 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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--->
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