Proposal: Embedded Expressions for String Statements (original) (raw)

rssh at gradsoft.com.ua rssh at gradsoft.com.ua
Fri Mar 20 14:32:53 PDT 2009

funny, i just joined the list specifically to ask about this subject.

why not just copy the groovy implementation of this? $var or ${expresion} ? in groovy it would be: "[$field1, field2,field2, field2,field3]" or with the explicit expression syntax: "[${field1}, field2,{field2}, field2,{field3}]"

Hmm, this broke, for example, near all tests of implementation of any scripting language with special meaning of '$'.

So, to be not dangerous for old code, string with embedded expressions enabled must be prefixed by special symbol ('@' ?)

I hate escape characters :)

On Thu, Mar 19, 2009 at 2:03 AM, Schulz, Stefan <schulz at e-spirit.de> wrote: The concat-variant to me is even worse readable than the original +-notation, having three consecutive commas in between. The proposal already mentions concatenation of any kind as alternative, although not mentioning concat(). Maybe worth expanding.

Stefan

-----Original Message----- From: rssh at gradsoft.com.ua [mailto:rssh at gradsoft.com.ua] Sent: Wednesday, March 18, 2009 8:58 PM To: Howard Lovatt Cc: coin-dev at openjdk.java.net; Schulz, Stefan Subject: Re: Proposal: Embedded Expressions for String Statements

> I like Stefan's proposed syntax and as a way of a motivating example > consider writing a toString method that gives the field values within > square brackets, now you would write: > > ═ ═ "[" + field1 + ", " + field2 + ", " + field3 + "]" > > With the proposal you would say: > > ═ ═ "[{field1}, {field2}, {field3}]" > > Which I find clearer. > Just note: now we can use much cleaner ═concat( field1, ',' , field2, ',' field3 )

> Many thanks to Stefan for writing this up formally. > >

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