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local info = {
version = 1.002,
comment = "scintilla lpeg lexer for json",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files",
}
local lpeg = lpeg
local P, R, S = lpeg.P, lpeg.R, lpeg.S
local lexers = require("scite-context-lexer")
local patterns = lexers.patterns
local token = lexers.token
local jsonlexer = lexers.new("json","scite-context-lexer-json")
local jsonwhitespace = jsonlexer.whitespace
local anything = patterns.anything
local comma = P(",")
local colon = P(":")
local escape = P("\\")
----- single = P("'")
local double = P('"')
local openarray = P('[')
local closearray = P(']')
local openhash = P('{')
local closehash = P('}')
----- lineending = S("\n\r")
local space = S(" \t\n\r\f")
local spaces = space^1
local operator = S(':,{}[]')
local fence = openarray + closearray + openhash + closehash
local escape_un = P("\\u") * S("09","AF","af")
local escape_bs = P("\\") * P(1)
----- content = (escape_un + escape_bs + (1-double))^0
local content = (escape_bs + (1-double))^0
local reserved = P("true")
+ P("false")
+ P("null")
local integer = P("-")^-1 * (patterns.hexadecimal + patterns.decimal)
local float = patterns.float
local t_number = token("number", float + integer)
* (token("error", R("AZ","az","__")^1))^0
local t_spacing = token("whitespace", space^1)
local t_optionalws = token("default", space^1)^0
local t_operator = token("special", operator)
local t_string = token("operator", double)
* token("string", content)
* token("operator", double)
local t_key = token("operator", double)
* token("text", content)
* token("operator", double)
* t_optionalws
* token("operator", colon)
local t_fences = token("operator", fence) -- grouping
local t_reserved = token("primitive", reserved)
local t_rest = token("default", anything)
jsonlexer.rules = {
{ "whitespace", t_spacing },
{ "reserved", t_reserved },
{ "key", t_key },
{ "number", t_number },
{ "string", t_string },
{ "fences", t_fences },
{ "operator", t_operator },
{ "rest", t_rest },
}
jsonlexer.folding = {
["{"] = { ["grouping"] = 1 },
["}"] = { ["grouping"] = -1 },
["["] = { ["grouping"] = 1 },
["]"] = { ["grouping"] = -1 },
}
return jsonlexer
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