Syntax: Escape hatch for unicode haters

Internals & Design
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7

Based on the previous macro, this version might have more compassion towards source-code reader:

using REPL
macro lvar_str(s::AbstractString)
    if !haskey(REPL.REPLCompletions.latex_symbols, "\\"*s) 
        throw(ArgumentError("expecting relevant latex"))
    end
    new_s = REPL.REPLCompletions.latex_symbols["\\"*s]
    sym = Meta.parse(unescape_string(new_s))
    sym isa Symbol || throw(ArgumentError("expecting a single symbol"))
    return esc(sym)
end

julia> lvar"mu"
3

julia> lvar"pi"
π = 3.1415926535897...
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