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Bison 1.875

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2. Examples

Now we show and explain three sample programs written using Bison: a reverse polish notation calculator, an algebraic (infix) notation calculator, and a multi-function calculator. All three have been tested under BSD Unix 4.3; each produces a usable, though limited, interactive desk-top calculator.

These examples are simple, but Bison grammars for real programming languages are written the same way. You can copy these examples out of the Info file and into a source file to try them.

2.1 Reverse Polish Notation Calculator    Reverse polish notation calculator; a first example with no operator precedence.

2.2 Infix Notation Calculator: calc    Infix (algebraic) notation calculator. Operator precedence is introduced.

2.3 Simple Error Recovery    Continuing after syntax errors.

2.4 Location Tracking Calculator: ltcalc    Demonstrating the use of @n and @$.

2.5 Multi-Function Calculator: mfcalc    Calculator with memory and trig functions. It uses multiple data-types for semantic values.

2.6 Exercises    Ideas for improving the multi-function calculator.

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Copyright © 2003 by The Free Software Foundation	Updated Jun 2003

2.1 Reverse Polish Notation Calculator		Reverse polish notation calculator; a first example with no operator precedence.
2.2 Infix Notation Calculator: `calc`		Infix (algebraic) notation calculator. Operator precedence is introduced.
2.3 Simple Error Recovery		Continuing after syntax errors.
2.4 Location Tracking Calculator: `ltcalc`		Demonstrating the use of @`n` and @$.
2.5 Multi-Function Calculator: `mfcalc`		Calculator with memory and trig functions. It uses multiple data-types for semantic values.
2.6 Exercises		Ideas for improving the multi-function calculator.