Bison 1.875

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Bison 1.875

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2.1 Reverse Polish Notation Calculator

The first example is that of a simple double-precision reverse polish notation calculator (a calculator using postfix operators). This example provides a good starting point, since operator precedence is not an issue. The second example will illustrate how operator precedence is handled.

The source code for this calculator is named `rpcalc.y'. The `.y' extension is a convention used for Bison input files.

2.1.1 Declarations for rpcalc    Prologue (declarations) for rpcalc.

2.1.2 Grammar Rules for rpcalc    Grammar Rules for rpcalc, with explanation.

2.1.3 The rpcalc Lexical Analyzer    The lexical analyzer.

2.1.4 The Controlling Function    The controlling function.

2.1.5 The Error Reporting Routine    The error reporting function.

2.1.6 Running Bison to Make the Parser    Running Bison on the grammar file.

2.1.7 Compiling the Parser File    Run the C compiler on the output code.

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2.1.1 Declarations for `rpcalc`		Prologue (declarations) for rpcalc.
2.1.2 Grammar Rules for `rpcalc`		Grammar Rules for rpcalc, with explanation.
2.1.3 The `rpcalc` Lexical Analyzer		The lexical analyzer.
2.1.4 The Controlling Function		The controlling function.
2.1.5 The Error Reporting Routine		The error reporting function.
2.1.6 Running Bison to Make the Parser		Running Bison on the grammar file.
2.1.7 Compiling the Parser File		Run the C compiler on the output code.