1 files changed, 161 insertions, 0 deletions
diff --git a/lua/lexers/meson.lua b/lua/lexers/meson.lua
new file mode 100644
index 0000000..b6cbe15
--- /dev/null
+++ b/lua/lexers/meson.lua
@@ -0,0 +1,161 @@
+-- Copyright 2020 Florian Fischer. See LICENSE.
+-- Meson file LPeg lexer.
+
+local l = require('lexer')
+local token, word_match = l.token, l.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local M = {_NAME = 'meson'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local comment = token(l.COMMENT, '#' * l.nonnewline_esc^0)
+
+-- Strings.
+local str = l.delimited_range("'", true)
+local multiline_str = "'''" * (l.any - "'''")^0 * P("'''")^-1
+local string = token(l.STRING, multiline_str + str)
+
+-- Numbers.
+local dec = R('19')^1 * R('09')^0
+local bin = '0b' * S('01')^1
+local oct = '0o' * R('07')^1
+local integer = S('+-')^-1 * (bin + l.hex_num + oct + dec)
+local number = token(l.NUMBER, integer)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'and', 'or', 'not',
+  'if', 'elif', 'else', 'endif',
+  'foreach', 'break', 'continue', 'endforeach',
+})
+
+-- Methods.
+-- https://mesonbuild.com/Reference-manual.html#builtin-objects
+-- https://mesonbuild.com/Reference-manual.html#returned-objects
+local method_names = word_match{
+  -- array --
+  'contains', 'get', 'length',
+  -- boolean --
+  'to_int', 'to_string',
+  -- dictionary --
+  'has_key', 'get', 'keys',
+  -- disabler --
+  'found',
+  -- integer --
+  'is_even', 'is_odd',
+  -- string --
+  'contains', 'endswith', 'format', 'join', 'split', 'startswith', 'substring',
+  'strip', 'to_int', 'to_lower', 'to_upper', 'underscorify', 'version_compare',
+  -- meson object --
+  'add_dist_script', 'add_install_script', 'add_postconf_script', 'backend',
+  'build_root', 'source_root', 'project_build_root', 'project_source_root',
+  'current_build_dir', 'current_source_dir', 'get_compiler',
+  'get_cross_property', 'get_external_property', 'can_run_host_binaries',
+  'has_exe_wrapper', 'install_dependency_manifest', 'is_cross_build',
+  'is_subproject', 'is_unity', 'override_find_program', 'override_dependency',
+  'project_version', 'project_license', 'project_name', 'version',
+  -- *_machine object --
+  'cpu_family', 'cpu', 'system', 'endian',
+  -- compiler object --
+  'alignment', 'cmd_array', 'compiles', 'compute_int', 'find_library',
+  'first_supported_argument', 'first_supported_link_argument', 'get_define',
+  'get_id', 'get_argument_syntax', 'get_linker_id', 'get_supported_arguments',
+  'get_supported_link_arguments', 'has_argument', 'has_link_argument',
+  'has_function', 'check_header', 'has_header', 'has_header_symbol',
+  'has_member', 'has_members', 'has_multi_arguments',
+  'has_multi_link_arguments', 'has_type', 'links', 'run',
+  'symbols_have_underscore_prefix', 'sizeof', 'version',
+  'has_function_attribute', 'get_supported_function_attributes',
+  -- build target object --
+  'extract_all_objects', 'extract_objects', 'full_path', 'private_dir_include',
+  'name',
+  -- configuration data object --
+  'get', 'get_unquoted', 'has', 'keys', 'merge_from', 'set', 'set10',
+  'set_quoted',
+  -- custom target object --
+  'full_path', 'to_list',
+  -- dependency object --
+  'found', 'name', 'get_pkgconfig_variable', 'get_configtool_variable',
+  'type_name', 'version', 'include_type', 'as_system', 'as_link_whole',
+  'partial_dependency', 'found',
+  -- external program object --
+  'found', 'path', 'full_path',
+  -- environment object --
+  'append', 'prepend', 'set',
+  -- external library object --
+  'found', 'type_name', 'partial_dependency', 'enabled', 'disabled', 'auto',
+  -- generator object --
+  'process',
+  -- subproject object --
+  'found', 'get_variable',
+  -- run result object --
+  'compiled', 'returncode', 'stderr', 'stdout',
+}
+-- A method call must be followed by an opening parenthesis.
+local method = token('method', method_names * #P(l.space^0 * S('(')))
+
+-- Function.
+-- https://mesonbuild.com/Reference-manual.html#functions
+local func_names =  word_match{
+  'add_global_arguments', 'add_global_link_arguments', 'add_languages',
+  'add_project_arguments', 'add_project_link_arguments', 'add_test_setup',
+  'alias_targ', 'assert', 'benchmark', 'both_libraries', 'build_target',
+  'configuration_data', 'configure_file', 'custom_target', 'declare_dependency',
+  'dependency', 'disabler', 'error', 'environment', 'executable',
+  'find_library', 'find_program', 'files', 'generator', 'get_option',
+  'get_variable', 'import', 'include_directories', 'install_data',
+  'install_headers', 'install_man', 'install_subdir', 'is_disabler',
+  'is_variable', 'jar', 'join_paths', 'library', 'message', 'warning',
+  'summary', 'project', 'run_command', 'run_targ', 'set_variable',
+  'shared_library', 'shared_module', 'static_library', 'subdir', 'subdir_done',
+  'subproject', 'test', 'vcs_tag',
+}
+-- A function call must be followed by an opening parenthesis.
+-- The matching of function calls instead of just their names is needed to not
+-- falsely highlight function names which can also be keyword arguments.
+-- For example 'include_directories' can be a function call itself or a keyword
+-- argument of an 'executable' or 'library' function call.
+local func = token(l.FUNCTION, func_names * #P(l.space^0 * S('(')))
+
+-- Builtin objects.
+-- https://mesonbuild.com/Reference-manual.html#builtin-objects
+local object = token('object', word_match{
+  'meson', 'build_machine', 'host_machine', 'target_machine',
+})
+
+-- Constants.
+local constant = token(l.CONSTANT, word_match{
+  'false', 'true',
+})
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, l.word)
+
+-- Operators.
+local operator = token(l.OPERATOR, S('()[]{}-=+/%:.,?<>'))
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'method', method},
+  {'function', func},
+  {'object', object},
+  {'constant', constant},
+  {'identifier', identifier},
+  {'comment', comment},
+  {'string', string},
+  {'number', number},
+  {'operator', operator},
+}
+
+M._tokenstyles = {
+  method = l.STYLE_FUNCTION,
+  object = l.STYLE_TYPE,
+}
+
+M._FOLDBYINDENTATION = true
+
+return M