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require "lib/metaprogramming.nom"
# Error functions
rule [error!, panic!, fail!, abort!] =:
compiler "error"[]
rule [error %msg] =:
compiler "error"[%msg]
macro block [assert %condition] =: ".."
|if not (\%condition as lua\) then
| compiler:error()
|end
macro block [assert %condition %msg] =: ".."
|if not (\%condition as lua\) then
| compiler:error(\%msg as lua\)
|end
macro block [show generated lua %block] =: ".."
|compiler:writeln(\lua expr "compiler:repr(compiler:tree_to_lua(vars.block.value))"\)
# String functions
rule [join %strs] =:
lua block ".."
|local str_bits = {}
|for i,bit in ipairs(vars.strs) do str_bits[i] = compiler.utils.repr_if_not_string(bit) end
|return table.concat(str_bits)
rule [join %strs with glue %glue] =:
lua block ".."
|local str_bits = {}
|for i,bit in ipairs(vars.strs) do str_bits[i] = compiler.utils.repr_if_not_string(bit) end
|return table.concat(str_bits, vars.glue)
macro [capitalize %str, %str capitalized] =: ".."
|(\%str as lua\):gsub("%l", string.upper, 1)
macro [repr %obj] =:
".."|compiler:repr(\%obj as lua\)
macro [%obj as string] =:
".."|compiler.utils.repr_if_not_string(\%obj as lua\)
macro [say %str] =:
".."|compiler:writeln(compiler.utils.repr_if_not_string(\%str as lua\))
# Number ranges
macro [%start up to %stop] =: ".."
|compiler.utils.range(\%start as lua\, \%stop as lua\-1)
macro [%start thru %stop, %start through %stop] =: ".."
|compiler.utils.range(\%start as lua\, \%stop as lua\)
macro [%start down to %stop] =: ".."
|compiler.utils.range(\%start as lua\, \%stop as lua\+1,-1)
macro [%start down thru %stop, %start down through %stop] =: ".."
|compiler.utils.range(\%start as lua\, \%stop as lua\,-1)
macro [%start up to %stop via %step] =: ".."
|compiler.utils.range(\%start as lua\,\%stop as lua\-1,vars.step)
macro [%start thru %stop via %step, %start through %stop via %step] =: ".."
|compiler.utils.range(\%start as lua\,\%stop as lua\,vars.step)
macro [%start down to %stop via %step] =: ".."
|compiler.utils.range(\%start as lua\,\%stop as lua\+1,-vars.step)
macro [%start down thru %stop via %step, %start down through %stop via %step] =: ".."
|compiler.utils.range(\%start as lua\,\%stop as lua\,-vars.step)
# Common utility functions
macro [random number, random, rand] =: "math.random()"
macro [random int %n, random integer %n, randint %n] =: ".."|math.random(\%n as lua\)
macro [random from %low to %high, random number from %low to %high, rand %low %high] =: ".."
|math.random(\%low as lua\, \%high as lua\)
rule [random choice from %elements, random choice %elements, random %elements] =:
lua expr ".."|vars.elements[math.random(#vars.elements)]
macro [sum of %items, sum %items] =: ".."|compiler.utils.sum(\%items as lua\)
macro [product of %items, product %items] =: ".."|compiler.utils.product(\%items as lua\)
macro [all of %items] =: ".."|compiler.utils.all(\%items as lua\)
macro [any of %items] =: ".."|compiler.utils.any(\%items as lua\)
# This is a rule, not a macro so we can use vars.items twice without running it twice.
rule [avg of %items, average of %items] =:
lua expr ".."|(compiler.utils.sum(vars.items)/#vars.items)
macro [min of %items, smallest of %items, lowest of %items] =:
".."|compiler.utils.min(\%items as lua\)
macro [max of %items, biggest of %items, largest of %items, highest of %items] =:
".."|compiler.utils.min(\%items as lua\)
macro [min of %items with respect to %keys] =:
".."|compiler.utils.min(\%items as lua\, \%keys as lua\)
macro [max of %items with respect to %keys] =:
".."|compiler.utils.max(\%items as lua\, \%keys as lua\)
|
