Hiya, been using Leon's gunit to test ANTLR's AST builder...works great! I
made a few improvements (for next v3 ANTLR release). Here's a few samples:
grammarSpec:
"parser grammar P; a : A;"
-> (PARSER_GRAMMAR P (RULES (RULE a (BLOCK (ALT A)))))
<<
parser grammar P;
options {k=2; output=AST;}
scope S {int x}
tokens { A; B='33'; }
@header {foo}
a : A;
>>
->
(PARSER_GRAMMAR P
(OPTIONS (= k 2) (= output AST))
(scope S {int x})
(tokens { A (= B '33'))
(@ header {foo})
(RULES (RULE a (BLOCK (ALT A)))))
block:
"( ^(A B) | ^(b C) )" -> (BLOCK (ALT ("^(" A B)) (ALT ("^(" b C)))
alternative:
"x+=ID* -> $x*" ->
(ALT_REWRITE
(ALT (* (BLOCK (ALT (+= x ID)))))
(-> (ALT (* (BLOCK (ALT x))))))
"A -> ..." -> (ALT_REWRITE (ALT A) (-> ...))
"A -> " -> (ALT_REWRITE (ALT A) (-> EPSILON))
element:
"b+" -> (+ (BLOCK (ALT b)))
"(b)+" -> (+ (BLOCK (ALT b)))
"b?" -> (? (BLOCK (ALT b)))
"(b)?" -> (? (BLOCK (ALT b)))
"(b)*" -> (* (BLOCK (ALT b)))
"b*" -> (* (BLOCK (ALT b)))
"'while'*" -> (* (BLOCK (ALT 'while')))
"'a'+" -> (+ (BLOCK (ALT 'a')))
"a[3]" -> (a 3)
"'a'..'z'+" -> (+ (BLOCK (ALT (.. 'a' 'z'))))
Pretty cool, eh?
Ter
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