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Deep copy macro ASTs when expanding

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So that we can individually tag expressions that originate from the same macro (see next commit).
This commit is contained in:
Henri DF 2016-02-22 20:27:57 -08:00
parent 3a56c1a0e4
commit 406f079621
1 changed files with 12 additions and 4 deletions
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16
userspace/digwatch/lua/compiler.lua
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@ -339,6 +339,14 @@ end
--]]
function expand_macros(node, defs, changed)
function copy(obj)
if type(obj) ~= 'table' then return obj end
local res = {}
for k, v in pairs(obj) do res[copy(k)] = copy(v) end
return res
end
if (node.type == "Rule") then
macros = expand_macros(node.filter, defs, changed)
elseif node.type == "Filter" then
@ -346,7 +354,7 @@ function expand_macros(node, defs, changed)
if (defs[node.value.value] == nil) then
error("Undefined macro '".. node.value.value .. "' used in filter.")
end
node.value = defs[node.value.value]
node.value = copy(defs[node.value.value])
changed = true
return changed
end
@ -358,7 +366,7 @@ function expand_macros(node, defs, changed)
if (defs[node.left.value] == nil) then
error("Undefined macro '".. node.left.value .. "' used in filter.")
end
node.left = defs[node.left.value]
node.left = copy(defs[node.left.value])
changed = true
end
@ -366,7 +374,7 @@ function expand_macros(node, defs, changed)
if (defs[node.right.value] == nil) then
error("Undefined macro ".. node.right.value .. "used in filter.")
end
node.right = defs[node.right.value]
node.right = copy(defs[node.right.value])
changed = true
end
@ -379,7 +387,7 @@ function expand_macros(node, defs, changed)
if (defs[node.argument.value] == nil) then
error("Undefined macro ".. node.argument.value .. "used in filter.")
end
node.argument = defs[node.argument.value]
node.argument = copy(defs[node.argument.value])
changed = true
end
return expand_macros(node.argument, defs, changed)