[#ANTLR-14] rewrite with pure action gets syntax error

ANTLR v3

rewrite with pure action gets syntax error

Created: 06/Nov/06 06:22 PM Updated: 10/Apr/07 06:00 PM

Component/s:

ANTLR Core

Affects Version/s:

3.0

Fix Version/s:

3.0b7

Description

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STRING -> {%{$STRING.text}} // how not to interpret string?
gets

codegen.g:0:0: attribute is not a token, parameter, or return value: $STRING
-> {...} doesn't work for trees; tree/template not consistent; one
has ALT above...templ doesn't.

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Comments

Change History

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Terence Parr - 23/Mar/07 01:45 PM

Benjamin Niemann says same for trees:

grammar T;
options {
    language = Java;
    output = AST;
}

r
    : INT -> {new CommonTree(new CommonToken(FLOAT,$INT.text+".0"))}
    ;

INT : '0'..'9'+;
WS: (' ' | '\n' | '\t')+ {$channel = HIDDEN;};

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Terence Parr - 10/Apr/07 06:00 PM

Altered antlr.g so it properly distinguished between rewrites for templates and ASTs. Let the ACTION come through properly then as an element of a rewrite alt for ASTs.