Re: [fpc-pascal] Free Pascal Language Diagram
On Tue, 11 Sep 2018, Anthony Walter wrote: I posted this link once before, but I thought I'd remind you guys it exists and ask if anyone would like to take the work from the page, and integrate it into either the official documentation or maintain it somewhere on the free pascal website. https://www.getlazarus.org/learn/language/lexical/ Where did you get the rendering library from ? Michael. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Free Pascal Language Diagram
Noice.
I'd been wanting to collect all of the ones from the docs into a more
coherent representation of the syntax.
On Tue, Sep 11, 2018 at 1:49 PM, Anthony Walter wrote:
> I posted this link once before, but I thought I'd remind you guys it
> exists and ask if anyone would like to take the work from the page, and
> integrate it into either the official documentation or maintain it
> somewhere on the free pascal website.
>
> https://www.getlazarus.org/learn/language/lexical/
>
> The diagrams are pretty easy to create and edit. For example proecudre
> header is defined through a script tag on the page as follows:
>
>
> Schematic(
> Link('Identifier', '#identifier'),
> Optional(Link('Generic Block', '#generic_block')),
> Optional(Link('Parameters', '#parameters')),
> Keyword(':'),
> Link('Identifier Dot', '#identifier_dot'),
> Keyword(';'),
> Optional(Link('Function Directives', '#function_directives'))
> ).render();
>
>
>
> And renders like so:
>
> https://www.getlazarus.org/learn/language/lexical/#function_header
>
> To use just copy this css and script file on the any page you want to
> display diagrams:
>
>
>
>
> You can look at the source of the page to see exactly what Schematic()
> commands are given to generate each diagram.
>
>
>
> ___
> fpc-pascal maillist - fpc-pascal@lists.freepascal.org
> http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
>
___
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] Free Pascal Language Diagram
I posted this link once before, but I thought I'd remind you guys it exists
and ask if anyone would like to take the work from the page, and integrate
it into either the official documentation or maintain it somewhere on the
free pascal website.
https://www.getlazarus.org/learn/language/lexical/
The diagrams are pretty easy to create and edit. For example proecudre
header is defined through a script tag on the page as follows:
Schematic(
Link('Identifier', '#identifier'),
Optional(Link('Generic Block', '#generic_block')),
Optional(Link('Parameters', '#parameters')),
Keyword(':'),
Link('Identifier Dot', '#identifier_dot'),
Keyword(';'),
Optional(Link('Function Directives', '#function_directives'))
).render();
And renders like so:
https://www.getlazarus.org/learn/language/lexical/#function_header
To use just copy this css and script file on the any page you want to
display diagrams:
You can look at the source of the page to see exactly what Schematic()
commands are given to generate each diagram.
___
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Hint converting to int64
On 11/09/18 16:15, Santiago A. wrote: El 11/09/18 a las 12:30, Mark Morgan Lloyd escribió:> On 11/09/18 10:15, Santiago A. wrote:>> Hello:FPC: 3.0.4 (Realease from Lazarus 1.8.4 SVN: 57972)OS: Windows7 >> 32bits / Linux 64Bits>> I have this code and I get a hint>> -- var Entity:Longword;FullParagraph:string; pIni:Integer; >> begin Entity:=Entity*10+ord(FullParagraph[pIni])-48; // <=== >> Hint end; --->> Hint: Converting the operands to "Int64" before doing the add could >> prevent overflow errors.I can't see why it mentions int64, there are >> integer and longword variables, but no Int64 one.>> There is you know.>> https://www.freepascal.org/docs-html/current/ref/refsu4.html#x26-250003.1.1 > --var Entity:Longword; FullParagraph:string; pIni:Integer;begin Entity:=Entity*10+ord(FullParagraph[pIni])-48; // <=== Hint end; ---Do you mean that Entity is promoted to int64 in a 32bits system? The operands Entity*10 and 10+ord(FullParagraph[pIni])-48 are both 32 bits, but the addition could overflow. The compiler writer's trying to be nice to you, quit kvetching :-) -- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues] ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Hint converting to int64
El 11/09/18 a las 12:30, Mark Morgan Lloyd escribió: On 11/09/18 10:15, Santiago A. wrote: Hello:FPC: 3.0.4 (Realease from Lazarus 1.8.4 SVN: 57972)OS: Windows7 32bits / Linux 64Bits I have this code and I get a hint -- var Entity:Longword;FullParagraph:string; pIni:Integer; begin Entity:=Entity*10+ord(FullParagraph[pIni])-48; // <=== Hint end; --- Hint: Converting the operands to "Int64" before doing the add could prevent overflow errors.I can't see why it mentions int64, there are integer and longword variables, but no Int64 one. There is you know. https://www.freepascal.org/docs-html/current/ref/refsu4.html#x26-250003.1.1 -- var Entity:Longword; FullParagraph:string; pIni:Integer; begin Entity:=Entity*10+ord(FullParagraph[pIni])-48; // <=== Hint end; --- Do you mean that Entity is promoted to int64 in a 32bits system? -- Saludos Santiago A. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Hint converting to int64
On 11/09/18 10:15, Santiago A. wrote: Hello:FPC: 3.0.4 (Realease from Lazarus 1.8.4 SVN: 57972)OS: Windows7 32bits / Linux 64Bits I have this code and I get a hint -- var Entity:Longword;FullParagraph:string; pIni:Integer; begin Entity:=Entity*10+ord(FullParagraph[pIni])-48; // <=== Hint end; --- Hint: Converting the operands to "Int64" before doing the add could prevent overflow errors.I can't see why it mentions int64, there are integer and longword variables, but no Int64 one. There is you know. https://www.freepascal.org/docs-html/current/ref/refsu4.html#x26-250003.1.1 I have replaced it by Entity:=Entity*10+LongWord(ord(FullParagraph[pIni]))-48; That is, I have casted the result of "ord()" to longword. But I get the same hint.What should I do to remove the hint? -- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues] ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] Hint converting to int64
Hello: FPC: 3.0.4 (Realease from Lazarus 1.8.4 SVN: 57972) OS: Windows7 32bits / Linux 64Bits I have this code and I get a hint -- var Entity:Longword;FullParagraph:string; pIni:Integer; begin Entity:=Entity*10+ord(FullParagraph[pIni])-48; // <=== Hint end; --- Hint: Converting the operands to "Int64" before doing the add could prevent overflow errors. I can't see why it mentions int64, there are integer and longword variables, but no Int64 one. I have replaced it by Entity:=Entity*10+LongWord(ord(FullParagraph[pIni]))-48; That is, I have casted the result of "ord()" to longword. But I get the same hint. What should I do to remove the hint? -- Saludos Santiago A. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
