On 18. Jan 2021, at 10:19, Marcel Taeumel <marcel.taeumel@hpi.de> wrote:

Hi David.

> I wonder whether it's possible to display the assignment operator '_'
> underscore as Left Arrow.

Well, the original font rendered the underscore character ("_") as a left arrow. One could still extend Shout to add a special text attribute to either "_" or ":=" to change to a font that has such a property. Maybe take a look at FormSetFont and the example in FormInspector >> #embedForm:inText:.

Of course, you could directly change the system's code font to one that renders all "_" as a left arrow, regardless of the context.

Note that it might be confusing for some users to see a left arrow as a single entity while actually having to type ":" and "=".

Also note that we removed all underscore assignments ("_") from Squeak's Trunk repository. For good. :-)

SyntaxHighlightingAsYouTypeLeftArrowAssignment _should_ work:

'If true, and syntaxHighlightingAsYouType is enabled, all ANSI format assignments ( := ) will be converted to left arrows ( _ ) when a method is selected in a Browser. Whilst editing a method, this setting has no effect - both the left arrow and the ansi format may be used.

If I enable it, I see _ instead of := in all methods, so it works fine.

Note that the fonts themselves support swapping _ and ^ for arrows.

Variant A: (destructive) See TextStyle>>#makeArrows

Variant B: (semi-destructive)

See StrikeFont>>#useLeftArrow and StrikeFont>>$#useUnderscore.

However, useLeftArrow is not completely right.

It should read:

useLeftArrow
self characterToGlyphMap.
characterToGlyphMap at: 96 put: 131.
characterToGlyphMap at: 95 put: 130.

After that, If you do

```

Preferences enable: #syntaxHighlightingAsYouTypeLeftArrowAssignment.
Preferences standardCodeFont useLeftArrow.

```

You'll see:

However, shout seems to do strange things there if #syntaxHighlightingAsYouTypeLeftArrowAssignment is on.

It tries hard to show the "assignment" as _ no matter what.

That said, It is supposed to somewhat work :)

Best regards

-Tobias

Best,
Marcel
Am 16.01.2021 17:03:31 schrieb stes@PANDORA.BE <stes@telenet.be>:

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Hi,

Platform: squeak 4.19.5 with Squeak 4.6 or squeak 5.x with Squeak 6.0alpha

I wonder whether it's possible to display the assignment operator '_'
underscore as Left Arrow.

"Cuis-Smalltalk" is doing this, looks very nice.

I've found something on wiki.squeak.org :

syntaxHighlightingAsYouTypeLeftArrowAssignment

in preferences.

Go to Menu -> Tools -> Preferences
(or Menu -> Apps -> Preferences Browser)

Search : syntaxHighlightingAsYouType

(it's under "browsing')

enabled

syntaxHighlightingAsYouTypeLeftArrowAssignment

enabled

does not work : do I need "Shout"

http://wiki.squeak.org/squeak/5700

is Shout still working in 4.6 ?

I have the impression from the wiki.squeak.org page that there existed
a package to display '_' as left-arrow but not sure whether it is still there.

David Stes

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