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local info = {
version = 1.002,
comment = "scintilla lpeg lexer for cpp",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files",
}
-- looks liks the original cpp lexer but web ready (so nothing special here yet)
local P, R, S = lpeg.P, lpeg.R, lpeg.S
local lexer = require("scite-context-lexer")
local context = lexer.context
local patterns = context.patterns
local token = lexer.token
local exact_match = lexer.exact_match
local cpplexer = lexer.new("cpp","scite-context-lexer-cpp")
local whitespace = cpplexer.whitespace
local keywords = { -- copied from cpp.lua
-- c
"asm", "auto", "break", "case", "const", "continue", "default", "do", "else",
"extern", "false", "for", "goto", "if", "inline", "register", "return",
"sizeof", "static", "switch", "true", "typedef", "volatile", "while",
"restrict",
-- hm
"_Bool", "_Complex", "_Pragma", "_Imaginary",
-- c++.
"catch", "class", "const_cast", "delete", "dynamic_cast", "explicit",
"export", "friend", "mutable", "namespace", "new", "operator", "private",
"protected", "public", "signals", "slots", "reinterpret_cast",
"static_assert", "static_cast", "template", "this", "throw", "try", "typeid",
"typename", "using", "virtual"
}
local datatypes = { -- copied from cpp.lua
"bool", "char", "double", "enum", "float", "int", "long", "short", "signed",
"struct", "union", "unsigned", "void"
}
local macros = { -- copied from cpp.lua
"define", "elif", "else", "endif", "error", "if", "ifdef", "ifndef", "import",
"include", "line", "pragma", "undef", "using", "warning"
}
local space = patterns.space -- S(" \n\r\t\f\v")
local any = patterns.any
local restofline = patterns.restofline
local startofline = patterns.startofline
local squote = P("'")
local dquote = P('"')
local period = P(".")
local escaped = P("\\") * P(1)
local slashes = P("//")
local begincomment = P("/*")
local endcomment = P("*/")
local percent = P("%")
local hexadecimal = patterns.hexadecimal
local decimal = patterns.decimal
local float = patterns.float
local integer = P("-")^-1 * (hexadecimal + decimal) -- also in patterns ?
local spacing = token(whitespace, space^1)
local rest = token("default", any)
local shortcomment = token("comment", slashes * restofline^0)
local longcomment = token("comment", begincomment * (1-endcomment)^0 * endcomment^-1)
local shortstring = token("quote", dquote) -- can be shared
* token("string", (escaped + (1-dquote))^0)
* token("quote", dquote)
+ token("quote", squote)
* token("string", (escaped + (1-squote))^0)
* token("quote", squote)
local number = token("number", float + integer)
local validword = R("AZ","az","__") * R("AZ","az","__","09")^0
local identifier = token("default",validword)
local operator = token("special", S("+-*/%^!=<>;:{}[]().&|?~"))
----- optionalspace = spacing^0
local p_keywords = exact_match(keywords)
local p_datatypes = exact_match(datatypes)
local p_macros = exact_match(macros)
local keyword = token("keyword", p_keywords)
local datatype = token("keyword", p_datatypes)
local identifier = token("default", validword)
local macro = token("data", #P("#") * startofline * P("#") * S("\t ")^0 * p_macros)
cpplexer._rules = {
{ "whitespace", spacing },
{ "keyword", keyword },
{ "type", datatype },
{ "identifier", identifier },
{ "string", shortstring },
{ "longcomment", longcomment },
{ "shortcomment", shortcomment },
{ "number", number },
{ "macro", macro },
{ "operator", operator },
{ "rest", rest },
}
local web = lexer.loadluafile("scite-context-lexer-web-snippets")
if web then
lexer.inform("supporting web snippets in cpp lexer")
cpplexer._rules_web = {
{ "whitespace", spacing },
{ "keyword", keyword },
{ "type", datatype },
{ "identifier", identifier },
{ "string", shortstring },
{ "longcomment", longcomment },
{ "shortcomment", shortcomment },
{ "web", web.pattern },
{ "number", number },
{ "macro", macro },
{ "operator", operator },
{ "rest", rest },
}
else
lexer.report("not supporting web snippets in cpp lexer")
cpplexer._rules_web = {
{ "whitespace", spacing },
{ "keyword", keyword },
{ "type", datatype },
{ "identifier", identifier },
{ "string", shortstring },
{ "longcomment", longcomment },
{ "shortcomment", shortcomment },
{ "number", number },
{ "macro", macro },
{ "operator", operator },
{ "rest", rest },
}
end
cpplexer._tokenstyles = context.styleset
cpplexer._foldpattern = P("/*") + P("*/") + S("{}") -- separate entry else interference (singular?)
cpplexer._foldsymbols = {
_patterns = {
"[{}]",
"/%*",
"%*/",
},
-- ["data"] = { -- macro
-- ["region"] = 1,
-- ["endregion"] = -1,
-- ["if"] = 1,
-- ["ifdef"] = 1,
-- ["ifndef"] = 1,
-- ["endif"] = -1,
-- },
["special"] = { -- operator
["{"] = 1,
["}"] = -1,
},
["comment"] = {
["/*"] = 1,
["*/"] = -1,
}
}
-- -- by indentation:
cpplexer._foldpatterns = nil
cpplexer._foldsymbols = nil
return cpplexer
|
