tsl_mem with like keyword

[rawsyntax]

Should the tsl_mem binary work with like? For example:

./tsl_mem -i "author like '%joe%'"
2019/05/30 12:37:51 unexpected literal: $like

I see it listed as part of the grammar and used with other tsl binaries

[yaacov]

Hi, thanks for the issue ❤️

TSL language definition and implementations:

So TSL has two sets of string operators for "like":

1 - The SQL like:
https://github.com/yaacov/tree-search-language/blob/master/pkg/tsl/consts.go#L33
https://github.com/yaacov/tree-search-language/blob/master/pkg/tsl/consts.go#L34

2 - The NoSQL regexp:
RegexOp: https://github.com/yaacov/tree-search-language/blob/master/pkg/tsl/consts.go#L31

I did not implement all the operator in all the walkers ... , for example the SQL implementation did not implement the regexp operator, while the mongo one will skip the like.

tsl_mem

./tsl-mem example use the semantic walker to implement an in memory database:
https://github.com/yaacov/tree-search-language/blob/master/cmd/tsl_mem/main.go#L31

Semantic Walker

When giving semantic meaning to the operators in semantic pkg ( https://godoc.org/github.com/yaacov/tree-search-language/pkg/walkers/semantics ) I only implemented the Regexp operator:

In the function that handle string operators:
https://github.com/yaacov/tree-search-language/blob/master/pkg/walkers/semantics/walk.go#L192
I only implemented:
RegExp:
https://github.com/yaacov/tree-search-language/blob/master/pkg/walkers/semantics/walk.go#L212

And like falls into unexpected literal here:
https://github.com/yaacov/tree-search-language/blob/master/pkg/walkers/semantics/walk.go#L226

---

P.S.

This will also happen in the mongo walker:
https://github.com/yaacov/tree-search-language/blob/master/pkg/walkers/mongo/walk.go#L79
That only implement Regexp:
https://github.com/yaacov/tree-search-language/blob/master/pkg/walkers/mongo/walk.go#L110

But not in the SQL walker 😄 :
https://github.com/yaacov/tree-search-language/blob/master/pkg/walkers/sql/walk.go#L139

[rawsyntax]

@yaacov thanks! 🙏