Hi. I'm trying to navigate the AST built using the ANTLR3 C target. I'm wondering how the token information is stored in the tree nodes. It seems there are two types of tree nodes. ANTLR3_BASE_TREE and ANTLR3_COMMON_TREE and I can set my grammar to produce the AST with either one.
The documentation suggests that an ANTLR3_BASE_TREE has no token information yet it contains a pointer to the getToken(ANTLR3_BASE_TREE) function. Can anyone clarify this? I've been trying out each type to try and work it out. getToken(ANTLR3_BASE_TREE) on the ANTLR3_BASE_TREE seems to return 0x0 which would support what the docs say about it having no token "payload" but then why does this function exist. When using ANTLR3_COMMON_TREE instead since I assumed this to be the solution, the token member of the struct is also 0x0 Finally doing commonTree->baseTree.getToken(&commonTree->basetree) as a last resort caused the program to segfault in dupTree() All in all I'm a bit confused about where the "content" of the AST actually lies. List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
