PRACTICAL GUIDEUnder review

Debugging and variable inspection

Prepares a small case for inspecting values at a breakpoint.

Debugging and variable inspectionAdvPL

01 · OVERVIEW

Overview

Official TDS VSCode documentation covers launch.json setup, server connection and F5 startup. Debug Console can inspect variables and execute operations: evaluating an expression is not necessarily side-effect-free observation. Compile the source in the matching test environment and place a breakpoint on the nTotal line, inspecting nQuantity and nPrice before assignment and nTotal after stepping. The example uses fictional data and opens no tables. Versions and launcher configuration must match the selected SmartClient. (TOTVS, n.d., ref. 1)

03 · PRACTICAL EXAMPLE

Commented example

#Include "Protheus.ch"
User Function Ed345()
    Local nQuantity := 2
    Local nPrice := 15
    Local nTotal
    // Breakpoint on this assignment; step to inspect the result.
    nTotal := nQuantity * nPrice
    ConOut(cValToChar(nTotal))
Return Nil

Expected result

After assignment, expected nTotal is 30; before it the local has no assigned numeric value. Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.

BEST PRACTICES

Match source and RPO. Do not evaluate write functions merely to inspect; avoid exposing credentials or real data in captures and logs.
Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.

Debugging and variable inspection

Overview

Commented example

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