internal/functions/hrule3-smush.ps1
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<# .SYNOPSIS Applies Rule 3: Hierarchy Smushing. .DESCRIPTION This function smushes two characters based on their hierarchy class according to Rule 3 of the FIGlet smushing rules. A hierarchy of six classes is defined: "|", "/\", "[]", "{}", "()", and "<>". When two smushing characters belong to different classes, the character from the latter class in the hierarchy is used. .PARAMETER ch1 The first character to evaluate for smushing. .PARAMETER ch2 The second character to evaluate for smushing. .EXAMPLE $ch1 = "|" $ch2 = ">" $result = hRule3-Smush -ch1 $ch1 -ch2 $ch2 This example smushes the characters "|" and ">" and returns ">". .EXAMPLE $ch1 = "(" $ch2 = "[" $result = hRule3-Smush -ch1 $ch1 -ch2 $ch2 This example smushes the characters "(" and "[" and returns "[". .EXAMPLE $ch1 = "|" $ch2 = "|" $result = hRule3-Smush -ch1 $ch1 -ch2 $ch2 This example does not smush the characters "|" and "|" because they belong to the same class and returns `$false`. .NOTES This function implements Rule 3 of the FIGlet smushing rules: Hierarchy Smushing. Author: Oleksandr Nikolaiev (@onikolaiev) #> function hRule3-Smush { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseApprovedVerbs", "")] param ( [string]$ch1, [string]$ch2 ) # Define the hierarchy classes explicitly $rule3Classes = @("|", "/", "\", "[", "]", "{", "}", "(", ")", "<", ">") # Get the indices of the characters in the hierarchy $r3_pos1 = $rule3Classes.IndexOf($ch1) $r3_pos2 = $rule3Classes.IndexOf($ch2) # Ensure both characters are in the hierarchy if ($r3_pos1 -ne -1 -and $r3_pos2 -ne -1) { # Check if characters are from different classes if ($r3_pos1 -ne $r3_pos2) { # Return the character from the latter class return $rule3Classes[[math]::Max($r3_pos1, $r3_pos2)] } } return $false } |