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Files

Akim Demaille 4619b32dc0 examples: don't promote unchecked function calls

* etc/bench.pl.in, examples/c/bistromathic/parse.y,
* examples/c/calc/calc.y, examples/c/pushcalc/calc.y: Check scanf's
return value.
* doc/bison.texi: Likewise, but only for the second example, to avoid
cluttering the very simple case.

2020-05-16 14:39:57 +02:00

calc.test

examples: add an example of a push parser

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calc.y

examples: don't promote unchecked function calls

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local.mk

examples: add an example of a push parser

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Makefile

examples: add an example of a push parser

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README.md

examples: use consistently the GFDL header for readmes

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README.md

pushcalc - push parser with Bison

This directory contains pushcalc, the traditional calculator, implemented as a push parser.

Traditionally Bison is used to create so called "pull parsers": the user invokes the parser once, which repeatedly calls (pulls) the scanner until the input is drained.

This example demonstrates the "push parsers": the user calls scanner to fetch the next token, passes (pushes) it to the parser, and repeats the operation until the input is drained.

This example is a straightforward conversion of the 'calc' example to the push-parser model.