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26 lines
669 B
Lua
26 lines
669 B
Lua
--- # Strings
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-- @titlelevel 3
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local utf8 = utf8 or require("lua-utf8")
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local ast = require("anselme.ast")
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local String, Number = ast.String, ast.Number
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return {
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--- Concatenate two strings and return the result as a new string.
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{ "_+_", "(a::is string, b::is string)", function(state, a, b) return String:new(a.string .. b.string) end },
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{
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--- Returns the length of the string `s`.
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"len", "(s::is string)",
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function(state, s)
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return Number:new(utf8.len(s.string))
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end
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},
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{
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--- Return the same string.
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-- See [format](#format-val) for details on the format function.
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"format", "(val::is string)",
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function(state, val)
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return val
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end
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}
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}
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