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26.1 Introduction

26.1 Introduction

The Stepper tool allows you to follow the execution of your program, displaying the source code as it executes. While stepping, you can see the evaluation of each subform, function call and the arguments and return values in each call. At every call to one of your functions, you have the option of stepping into that function, that is stepping the source code definition of the function.

Where a macro appears in stepped code, the Stepper can macroexpand the form and step the resulting expansion, or simply step the visible inner forms of the macro form. Where a special form such as if appears in stepped code, the Stepper processes it according to the execution order in that special form.

The system creates a Stepper tool automatically when your code reaches a breakpoint

Other ways to start a Stepper tool are:

Figure 26.1 The Stepper

The Stepper has four areas:

26.1.1 Stepper toolbar 26.1.2 Source area 26.1.3 Backtrace area 26.1.4 Listener area

LispWorks IDE User Guide (Windows version) - 25 Nov 2011


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