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Add constants

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This commit is contained in:
Étienne Fildadut 2022-09-08 22:09:11 +09:00
parent 3e658e4780
commit 95683a0ffd
17 changed files with 290 additions and 8 deletions
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14
parser/preparser.lua
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@ -291,8 +291,15 @@ local function parse_line(line, state, namespace, parent_function)
elseif l:match("^:") then
r.type = "definition"
r.remove_from_block_ast = true
local rem = l:match("^:(.*)$")
-- check if constant
if rem:match("^:") then
rem = rem:match("^:(.*)$")
r.constant = true
end
-- get identifier
local identifier, rem = l:match("^:("..identifier_pattern..")(.-)$")
local identifier
identifier, rem = rem:match("^("..identifier_pattern..")(.-)$")
if not identifier then return nil, ("no valid identifier at start of definition line %q; at %s"):format(l, line.source) end
-- format identifier
local fqm = ("%s%s"):format(namespace, format_identifier(identifier))
@ -319,6 +326,7 @@ local function parse_line(line, state, namespace, parent_function)
r.fqm = fqm
r.expression = exp
state.variables[fqm] = { type = "pending definition", value = { expression = nil, source = r.source } }
if r.constant then state.variable_constants[fqm] = true end
-- tag
elseif l:match("^%#") then
r.type = "tag"
@ -514,6 +522,7 @@ local function parse(state, s, name, source)
inject = {},
aliases = setmetatable({}, { __index = state.aliases }),
variable_constraints = setmetatable({}, { __index = state.variable_constraints }),
variable_constants = setmetatable({}, { __index = state.variable_constants }),
variables = setmetatable({}, { __index = state.aliases }),
functions = setmetatable({}, {
__index = function(self, key)
@ -549,6 +558,9 @@ local function parse(state, s, name, source)
for k,v in pairs(state_proxy.variable_constraints) do
state.variable_constraints[k] = v
end
for k,v in pairs(state_proxy.variable_constants) do
state.variable_constants[k] = v
end
for k,v in pairs(state_proxy.variables) do
state.variables[k] = v
end