[stringtemplate-interest] Passing values into templates

[Ben Hood]

On 20 Apr 2008, at 06:26, Terence Parr wrote:

>
> On Apr 19, 2008, at 4:32 PM, Ben Hood wrote:
>>> Eg:
>>>  return <readBytes("length= next - 0x20")>;
>>
>> If I do this, i.e. return <readBytes(length="next - 0x20")>; then I
>> run into this error:
>>
>> action parse error in group GenricReader line 7; template context is
>> [decode]
>> line 1:1: unexpected token: readBytes
>
>
> problem is in template decode it appears.  did you terminate it?
> Ter

I've tried to break the problem down into it's simplest form.

If I do this:

decode() ::= <<
     int next = <readByte()>;
     if (next <ge()> 0x20 && next <le()> 0x2f) {
         return <readBytes(length="next - 0x20")>;
     }
 >>

readBytes(length) ::= "inputStream.readBytes(<length>)"

I get this error:

action parse error in group GenricReader line 8; template context is  
[decode]
line 1:1: unexpected token: readBytes

If I change it to this

decode() ::= <<
     int next = <readByte()>;
     if (next <ge()> 0x20 && next <le()> 0x2f) {
         return <readBytes("next - 0x20")>;
     }
 >>

readBytes(length) ::= "inputStream.readBytes(<length>)"

I get this error:

action parse error in group GenricReader line 15; template context is  
[readBytes]
line 1:7: expecting LPAREN, found 'null'

Maybe I'm doing something fundamentally wrong.

Ben