internal/functions/vrule3-smush.ps1
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<# .SYNOPSIS Applies Rule 3: Hierarchy Smushing for vertical smushing. .DESCRIPTION This function smushes two characters vertically based on their hierarchy class according to Rule 3 of the FIGlet vertical smushing rules. A hierarchy of classes is defined: `|`, `/`, `\`, `[`, `]`, `{`, `}`, `(`, `)`, `<`, `>`. When two smushing characters belong to different classes, the character from the latter class in the hierarchy is used. If the characters belong to the same class, the function returns `$false`. .PARAMETER ch1 The first character to evaluate for vertical smushing. .PARAMETER ch2 The second character to evaluate for vertical smushing. .EXAMPLE $ch1 = "|" $ch2 = ">" $result = vRule3-Smush -ch1 $ch1 -ch2 $ch2 This example smushes the characters "|" and ">" and returns ">". .EXAMPLE $ch1 = "(" $ch2 = "[" $result = vRule3-Smush -ch1 $ch1 -ch2 $ch2 This example smushes the characters "(" and "[" and returns "[". .EXAMPLE $ch1 = "|" $ch2 = "|" $result = vRule3-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 vertical smushing rules: Hierarchy Smushing. Author: Oleksandr Nikolaiev (@onikolaiev) #> function vRule3-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) { # Return $false if both characters are the same if ($r3_pos1 -eq $r3_pos2) { return $false } # Return the character from the latter class return $rule3Classes[[math]::Max($r3_pos1, $r3_pos2)] } return $false } |