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This is a flatbuffers implementation in Elixir. In contrast to existing implementations there is no need to compile code from a schema. Instead, data and schemas are processed dynamically at runtime, offering greater flexibility.
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src/schema_lexer.xrl
Definitions.
FLOAT = -?[0-9]+\.[0-9]+([eE][-+]?[0-9]+)?
INT = -?[0-9]+
STRING = [a-zA-Z0-9_\.]+
BOOL = (true|false)
WS = [\s\t]+
NL = [\n\r]+
Rules.
table{WS} : {token, {table, TokenLine}}.
struct{WS} : {token, {struct, TokenLine}}.
enum{WS} : {token, {enum, TokenLine}}.
union{WS} : {token, {union, TokenLine}}.
namespace{WS} : {token, {namespace, TokenLine}}.
root_type{WS} : {token, {root_type, TokenLine}}.
include{WS} : {token, {include, TokenLine}}.
attribute{WS} : {token, {attribute, TokenLine}}.
file_identifier{WS} : {token, {file_identifier, TokenLine}}.
file_extension{WS} : {token, {file_extension, TokenLine}}.
{FLOAT} : {Val, _} = string:to_float(TokenChars), {token, {float, TokenLine, Val}}.
{INT} : {Val, _} = string:to_integer(TokenChars), {token, {int, TokenLine, Val}}.
{BOOL} : {token, {int, TokenLine, get_bool(TokenChars)}}.
{STRING} : {token, {string, TokenLine, TokenChars}}.
{WS} : skip_token.
{NL} : skip_token.
\{ : {token, {'{', TokenLine}}.
\} : {token, {'}', TokenLine}}.
\( : {token, {'(', TokenLine}}.
\) : {token, {')', TokenLine}}.
\[ : {token, {'[', TokenLine}}.
\] : {token, {']', TokenLine}}.
\; : {token, {';', TokenLine}}.
\, : {token, {',', TokenLine}}.
\: : {token, {':', TokenLine}}.
\= : {token, {'=', TokenLine}}.
\" : {token, {quote, TokenLine}}.
Erlang code.
get_bool("true") -> true;
get_bool("false") -> false.