inline native Julia scalars encountered in f.(args...) AST

[stevengj]

This is an alternative version of #18202, following a suggestion by @JeffBezanson.

As an optimization, the "dot call" fusion does "inlining" of literal scalars, so that e.g. f.(x,3) turns into broadcast(x -> f(x,3), x) rather than broadcast(f, x, 3). This PR expands the range of scalars that are inlined to include Julia Number objects in the AST (and could do the same for String and some other types once #16966 is fixed … since it is just an optimization, it is okay if we aren't exhaustive).

(As was observed in #18176, the parser actually ends up converting things like floating-point literals into Julia objects in the AST, so without this optimization they aren't inlined.)

[JeffBezanson]

The symbol lookup dance can be avoided by adding the function here instead:

julia/src/ast.c

Line 194 in 2390055

static const builtinspec_t julia_flisp_ast_ext[] = {

I should have thought of that. Sorry to cause you this trouble.

[stevengj]

Ah, thanks for the tip.

[stevengj]

Okay, fixed; now it's a lot simpler.