module js

import v.ast

fn (mut g JsGen) gen_branch_context_string() string {
    mut arr := []string{}

    // gen `T=int,X=string`
    if g.fn_decl != unsafe { nil } && g.fn_decl.generic_names.len > 0
        && g.fn_decl.generic_names.len == g.cur_concrete_types.len {
        for i in 0 .. g.fn_decl.generic_names.len {
            arr << g.fn_decl.generic_names[i] + '=' +
                g.table.type_to_str(g.cur_concrete_types[i]).replace('main.', '')
        }
    }

    // TODO: support comptime `$for`
    return arr.join(',')
}

fn (mut g JsGen) comptime_if_result(branch ast.IfBranch) bool {
    idx_str := g.gen_branch_context_string() + '|id=${branch.id}|'
    $if debug_comptime_branch_context ? {
        g.write('/* ${idx_str} */')
    }
    if comptime_is_true := g.table.comptime_is_true[idx_str] {
        return comptime_is_true.val
    } else {
        panic('checker error: cond result idx string not found => [${idx_str}]')
        return false
    }
}