2020-02-27 04:07:26 -06:00
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//! Defines input for code generation process.
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2020-01-03 13:37:02 -06:00
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pub(crate) struct KindsSrc<'a> {
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pub(crate) punct: &'a [(&'a str, &'a str)],
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pub(crate) keywords: &'a [&'a str],
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pub(crate) contextual_keywords: &'a [&'a str],
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pub(crate) literals: &'a [&'a str],
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pub(crate) tokens: &'a [&'a str],
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pub(crate) nodes: &'a [&'a str],
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}
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pub(crate) const KINDS_SRC: KindsSrc = KindsSrc {
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punct: &[
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(";", "SEMI"),
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(",", "COMMA"),
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("(", "L_PAREN"),
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(")", "R_PAREN"),
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("{", "L_CURLY"),
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("}", "R_CURLY"),
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("[", "L_BRACK"),
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("]", "R_BRACK"),
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("<", "L_ANGLE"),
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(">", "R_ANGLE"),
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("@", "AT"),
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("#", "POUND"),
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("~", "TILDE"),
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("?", "QUESTION"),
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("$", "DOLLAR"),
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("&", "AMP"),
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("|", "PIPE"),
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("+", "PLUS"),
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("*", "STAR"),
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("/", "SLASH"),
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("^", "CARET"),
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("%", "PERCENT"),
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("_", "UNDERSCORE"),
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(".", "DOT"),
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("..", "DOTDOT"),
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("...", "DOTDOTDOT"),
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("..=", "DOTDOTEQ"),
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(":", "COLON"),
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("::", "COLONCOLON"),
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("=", "EQ"),
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("==", "EQEQ"),
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("=>", "FAT_ARROW"),
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("!", "EXCL"),
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("!=", "NEQ"),
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("-", "MINUS"),
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("->", "THIN_ARROW"),
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("<=", "LTEQ"),
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(">=", "GTEQ"),
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("+=", "PLUSEQ"),
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("-=", "MINUSEQ"),
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("|=", "PIPEEQ"),
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("&=", "AMPEQ"),
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("^=", "CARETEQ"),
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("/=", "SLASHEQ"),
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("*=", "STAREQ"),
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("%=", "PERCENTEQ"),
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("&&", "AMPAMP"),
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("||", "PIPEPIPE"),
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("<<", "SHL"),
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(">>", "SHR"),
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("<<=", "SHLEQ"),
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(">>=", "SHREQ"),
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],
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keywords: &[
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"as", "async", "await", "box", "break", "const", "continue", "crate", "dyn", "else",
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"enum", "extern", "false", "fn", "for", "if", "impl", "in", "let", "loop", "macro",
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"match", "mod", "move", "mut", "pub", "ref", "return", "self", "static", "struct", "super",
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"trait", "true", "try", "type", "unsafe", "use", "where", "while",
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],
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contextual_keywords: &["auto", "default", "existential", "union"],
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literals: &[
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"INT_NUMBER",
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"FLOAT_NUMBER",
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"CHAR",
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"BYTE",
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"STRING",
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"RAW_STRING",
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"BYTE_STRING",
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"RAW_BYTE_STRING",
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],
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tokens: &[
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"ERROR",
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"IDENT",
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"WHITESPACE",
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"LIFETIME",
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"COMMENT",
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"SHEBANG",
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"L_DOLLAR",
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"R_DOLLAR",
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],
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nodes: &[
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"SOURCE_FILE",
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"STRUCT_DEF",
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"UNION_DEF",
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"ENUM_DEF",
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"FN_DEF",
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"RET_TYPE",
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"EXTERN_CRATE_ITEM",
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"MODULE",
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"USE_ITEM",
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"STATIC_DEF",
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"CONST_DEF",
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"TRAIT_DEF",
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2020-02-29 14:24:40 -06:00
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"IMPL_DEF",
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2020-01-03 13:37:02 -06:00
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"TYPE_ALIAS_DEF",
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"MACRO_CALL",
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"TOKEN_TREE",
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"MACRO_DEF",
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"PAREN_TYPE",
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"TUPLE_TYPE",
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"NEVER_TYPE",
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"PATH_TYPE",
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"POINTER_TYPE",
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"ARRAY_TYPE",
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"SLICE_TYPE",
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"REFERENCE_TYPE",
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"PLACEHOLDER_TYPE",
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"FN_POINTER_TYPE",
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"FOR_TYPE",
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"IMPL_TRAIT_TYPE",
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"DYN_TRAIT_TYPE",
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2020-02-09 12:57:01 -06:00
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"OR_PAT",
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"PAREN_PAT",
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"REF_PAT",
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"BOX_PAT",
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"BIND_PAT",
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"PLACEHOLDER_PAT",
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"DOT_DOT_PAT",
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"PATH_PAT",
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"RECORD_PAT",
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"RECORD_FIELD_PAT_LIST",
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"RECORD_FIELD_PAT",
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"TUPLE_STRUCT_PAT",
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"TUPLE_PAT",
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"SLICE_PAT",
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"RANGE_PAT",
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"LITERAL_PAT",
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// atoms
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"TUPLE_EXPR",
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"ARRAY_EXPR",
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"PAREN_EXPR",
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"PATH_EXPR",
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"LAMBDA_EXPR",
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"IF_EXPR",
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"WHILE_EXPR",
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"CONDITION",
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"LOOP_EXPR",
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"FOR_EXPR",
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"CONTINUE_EXPR",
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"BREAK_EXPR",
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"LABEL",
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"BLOCK_EXPR",
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"RETURN_EXPR",
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"MATCH_EXPR",
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"MATCH_ARM_LIST",
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"MATCH_ARM",
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"MATCH_GUARD",
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"RECORD_LIT",
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"RECORD_FIELD_LIST",
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"RECORD_FIELD",
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"TRY_BLOCK_EXPR",
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"BOX_EXPR",
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// postfix
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"CALL_EXPR",
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"INDEX_EXPR",
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"METHOD_CALL_EXPR",
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"FIELD_EXPR",
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"AWAIT_EXPR",
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"TRY_EXPR",
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"CAST_EXPR",
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// unary
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"REF_EXPR",
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"PREFIX_EXPR",
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"RANGE_EXPR", // just weird
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"BIN_EXPR",
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"BLOCK",
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"EXTERN_BLOCK",
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"EXTERN_ITEM_LIST",
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"ENUM_VARIANT",
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"RECORD_FIELD_DEF_LIST",
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"RECORD_FIELD_DEF",
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"TUPLE_FIELD_DEF_LIST",
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"TUPLE_FIELD_DEF",
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"ENUM_VARIANT_LIST",
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"ITEM_LIST",
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"ATTR",
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"META_ITEM", // not an item actually
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"USE_TREE",
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"USE_TREE_LIST",
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"PATH",
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"PATH_SEGMENT",
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"LITERAL",
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"ALIAS",
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"VISIBILITY",
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"WHERE_CLAUSE",
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"WHERE_PRED",
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"ABI",
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"NAME",
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"NAME_REF",
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"LET_STMT",
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"EXPR_STMT",
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"TYPE_PARAM_LIST",
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"LIFETIME_PARAM",
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"TYPE_PARAM",
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"CONST_PARAM",
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"TYPE_ARG_LIST",
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"LIFETIME_ARG",
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"TYPE_ARG",
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"ASSOC_TYPE_ARG",
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2020-01-06 16:59:03 -06:00
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"CONST_ARG",
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2020-01-03 13:37:02 -06:00
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"PARAM_LIST",
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"PARAM",
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"SELF_PARAM",
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"ARG_LIST",
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"TYPE_BOUND",
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"TYPE_BOUND_LIST",
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// macro related
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"MACRO_ITEMS",
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"MACRO_STMTS",
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],
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};
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pub(crate) struct AstSrc<'a> {
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pub(crate) nodes: &'a [AstNodeSrc<'a>],
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pub(crate) enums: &'a [AstEnumSrc<'a>],
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}
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pub(crate) struct AstNodeSrc<'a> {
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pub(crate) name: &'a str,
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pub(crate) traits: &'a [&'a str],
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pub(crate) fields: &'a [(&'a str, FieldSrc<&'a str>)],
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}
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pub(crate) enum FieldSrc<T> {
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Shorthand,
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Optional(T),
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Many(T),
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}
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pub(crate) struct AstEnumSrc<'a> {
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pub(crate) name: &'a str,
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pub(crate) traits: &'a [&'a str],
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pub(crate) variants: &'a [&'a str],
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}
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macro_rules! ast_nodes {
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($(
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struct $name:ident$(: $($trait:ident),*)? {
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$($field_name:ident $(: $ty:tt)?),*$(,)?
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}
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)*) => {
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[$(
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AstNodeSrc {
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name: stringify!($name),
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traits: &[$($(stringify!($trait)),*)?],
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fields: &[$(
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(stringify!($field_name), field_ty!($field_name $($ty)?))
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),*],
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}
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),*]
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};
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}
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macro_rules! field_ty {
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($field_name:ident) => {
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FieldSrc::Shorthand
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};
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($field_name:ident [$ty:ident]) => {
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FieldSrc::Many(stringify!($ty))
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};
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($field_name:ident $ty:ident) => {
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FieldSrc::Optional(stringify!($ty))
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};
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}
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macro_rules! ast_enums {
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($(
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enum $name:ident $(: $($trait:ident),*)? {
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$($variant:ident),*$(,)?
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}
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)*) => {
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[$(
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AstEnumSrc {
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name: stringify!($name),
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traits: &[$($(stringify!($trait)),*)?],
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variants: &[$(stringify!($variant)),*],
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}
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),*]
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};
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}
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pub(crate) const AST_SRC: AstSrc = AstSrc {
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nodes: &ast_nodes! {
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struct SourceFile: ModuleItemOwner, FnDefOwner {
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modules: [Module],
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}
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struct FnDef: VisibilityOwner, NameOwner, TypeParamsOwner, DocCommentsOwner, AttrsOwner {
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ParamList,
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RetType,
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body: BlockExpr,
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}
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struct RetType { TypeRef }
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struct StructDef: VisibilityOwner, NameOwner, TypeParamsOwner, AttrsOwner, DocCommentsOwner {
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}
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struct UnionDef: VisibilityOwner, NameOwner, TypeParamsOwner, AttrsOwner, DocCommentsOwner {
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RecordFieldDefList,
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}
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struct RecordFieldDefList { fields: [RecordFieldDef] }
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struct RecordFieldDef: VisibilityOwner, NameOwner, AttrsOwner, DocCommentsOwner, TypeAscriptionOwner { }
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struct TupleFieldDefList { fields: [TupleFieldDef] }
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struct TupleFieldDef: VisibilityOwner, AttrsOwner {
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TypeRef,
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}
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struct EnumDef: VisibilityOwner, NameOwner, TypeParamsOwner, AttrsOwner, DocCommentsOwner {
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variant_list: EnumVariantList,
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}
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struct EnumVariantList {
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variants: [EnumVariant],
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}
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struct EnumVariant: NameOwner, DocCommentsOwner, AttrsOwner {
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Expr
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}
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struct TraitDef: VisibilityOwner, NameOwner, AttrsOwner, DocCommentsOwner, TypeParamsOwner, TypeBoundsOwner {
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ItemList,
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}
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struct Module: VisibilityOwner, NameOwner, AttrsOwner, DocCommentsOwner {
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ItemList,
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}
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struct ItemList: FnDefOwner, ModuleItemOwner {
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impl_items: [ImplItem],
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}
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struct ConstDef: VisibilityOwner, NameOwner, TypeParamsOwner, AttrsOwner, DocCommentsOwner, TypeAscriptionOwner {
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body: Expr,
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}
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struct StaticDef: VisibilityOwner, NameOwner, TypeParamsOwner, AttrsOwner, DocCommentsOwner, TypeAscriptionOwner {
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body: Expr,
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}
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struct TypeAliasDef: VisibilityOwner, NameOwner, TypeParamsOwner, AttrsOwner, DocCommentsOwner, TypeBoundsOwner {
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TypeRef,
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}
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2020-02-29 14:24:40 -06:00
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struct ImplDef: TypeParamsOwner, AttrsOwner {
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ItemList,
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}
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struct ParenType { TypeRef }
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struct TupleType { fields: [TypeRef] }
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struct NeverType { }
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struct PathType { Path }
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struct PointerType { TypeRef }
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struct ArrayType { TypeRef, Expr }
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struct SliceType { TypeRef }
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struct ReferenceType { TypeRef }
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struct PlaceholderType { }
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struct FnPointerType { ParamList, RetType }
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struct ForType { TypeRef }
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struct ImplTraitType: TypeBoundsOwner {}
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struct DynTraitType: TypeBoundsOwner {}
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struct TupleExpr { exprs: [Expr] }
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struct ArrayExpr { exprs: [Expr] }
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struct ParenExpr { Expr }
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struct PathExpr { Path }
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struct LambdaExpr {
|
|
|
|
ParamList,
|
|
|
|
RetType,
|
|
|
|
body: Expr,
|
|
|
|
}
|
|
|
|
struct IfExpr { Condition }
|
|
|
|
struct LoopExpr: LoopBodyOwner { }
|
|
|
|
struct TryBlockExpr { body: BlockExpr }
|
|
|
|
struct ForExpr: LoopBodyOwner {
|
|
|
|
Pat,
|
|
|
|
iterable: Expr,
|
|
|
|
}
|
|
|
|
struct WhileExpr: LoopBodyOwner { Condition }
|
|
|
|
struct ContinueExpr {}
|
|
|
|
struct BreakExpr { Expr }
|
|
|
|
struct Label {}
|
|
|
|
struct BlockExpr { Block }
|
|
|
|
struct ReturnExpr { Expr }
|
|
|
|
struct CallExpr: ArgListOwner { Expr }
|
|
|
|
struct MethodCallExpr: ArgListOwner {
|
|
|
|
Expr, NameRef, TypeArgList,
|
|
|
|
}
|
|
|
|
struct IndexExpr {}
|
|
|
|
struct FieldExpr { Expr, NameRef }
|
|
|
|
struct AwaitExpr { Expr }
|
|
|
|
struct TryExpr { Expr }
|
|
|
|
struct CastExpr { Expr, TypeRef }
|
|
|
|
struct RefExpr { Expr }
|
|
|
|
struct PrefixExpr { Expr }
|
|
|
|
struct BoxExpr { Expr }
|
|
|
|
struct RangeExpr {}
|
|
|
|
struct BinExpr {}
|
|
|
|
struct Literal {}
|
|
|
|
|
|
|
|
struct MatchExpr { Expr, MatchArmList }
|
|
|
|
struct MatchArmList: AttrsOwner { arms: [MatchArm] }
|
|
|
|
struct MatchArm: AttrsOwner {
|
2020-02-09 12:57:01 -06:00
|
|
|
pat: Pat,
|
2020-01-03 13:37:02 -06:00
|
|
|
guard: MatchGuard,
|
|
|
|
Expr,
|
2020-02-11 15:33:11 -06:00
|
|
|
}
|
2020-01-03 13:37:02 -06:00
|
|
|
struct MatchGuard { Expr }
|
|
|
|
|
|
|
|
struct RecordLit { Path, RecordFieldList }
|
|
|
|
struct RecordFieldList {
|
|
|
|
fields: [RecordField],
|
|
|
|
spread: Expr,
|
2020-02-11 15:33:11 -06:00
|
|
|
}
|
2020-01-03 13:37:02 -06:00
|
|
|
struct RecordField { NameRef, Expr }
|
|
|
|
|
2020-02-09 12:57:01 -06:00
|
|
|
struct OrPat { pats: [Pat] }
|
|
|
|
struct ParenPat { Pat }
|
2020-01-03 13:37:02 -06:00
|
|
|
struct RefPat { Pat }
|
|
|
|
struct BoxPat { Pat }
|
|
|
|
struct BindPat: NameOwner { Pat }
|
|
|
|
struct PlaceholderPat { }
|
|
|
|
struct DotDotPat { }
|
2020-02-11 15:33:11 -06:00
|
|
|
struct PathPat { Path }
|
|
|
|
struct SlicePat { args: [Pat] }
|
2020-01-03 13:37:02 -06:00
|
|
|
struct RangePat {}
|
|
|
|
struct LiteralPat { Literal }
|
|
|
|
|
|
|
|
struct RecordPat { RecordFieldPatList, Path }
|
|
|
|
struct RecordFieldPatList {
|
|
|
|
record_field_pats: [RecordFieldPat],
|
|
|
|
bind_pats: [BindPat],
|
|
|
|
}
|
|
|
|
struct RecordFieldPat: NameOwner { Pat }
|
|
|
|
|
|
|
|
struct TupleStructPat { Path, args: [Pat] }
|
|
|
|
struct TuplePat { args: [Pat] }
|
|
|
|
|
|
|
|
struct Visibility {}
|
|
|
|
struct Name {}
|
|
|
|
struct NameRef {}
|
|
|
|
|
|
|
|
struct MacroCall: NameOwner, AttrsOwner,DocCommentsOwner {
|
|
|
|
TokenTree, Path
|
|
|
|
}
|
|
|
|
struct Attr { Path, input: AttrInput }
|
|
|
|
struct TokenTree {}
|
|
|
|
struct TypeParamList {
|
|
|
|
type_params: [TypeParam],
|
|
|
|
lifetime_params: [LifetimeParam],
|
|
|
|
}
|
|
|
|
struct TypeParam: NameOwner, AttrsOwner, TypeBoundsOwner {
|
|
|
|
default_type: TypeRef,
|
|
|
|
}
|
|
|
|
struct ConstParam: NameOwner, AttrsOwner, TypeAscriptionOwner {
|
|
|
|
default_val: Expr,
|
|
|
|
}
|
|
|
|
struct LifetimeParam: AttrsOwner { }
|
|
|
|
struct TypeBound { TypeRef}
|
|
|
|
struct TypeBoundList { bounds: [TypeBound] }
|
|
|
|
struct WherePred: TypeBoundsOwner { TypeRef }
|
|
|
|
struct WhereClause { predicates: [WherePred] }
|
|
|
|
struct ExprStmt { Expr }
|
|
|
|
struct LetStmt: TypeAscriptionOwner {
|
|
|
|
Pat,
|
|
|
|
initializer: Expr,
|
|
|
|
}
|
|
|
|
struct Condition { Pat, Expr }
|
|
|
|
struct Block: AttrsOwner, ModuleItemOwner {
|
|
|
|
statements: [Stmt],
|
|
|
|
Expr,
|
|
|
|
}
|
|
|
|
struct ParamList {
|
|
|
|
SelfParam,
|
|
|
|
params: [Param],
|
|
|
|
}
|
|
|
|
struct SelfParam: TypeAscriptionOwner, AttrsOwner { }
|
|
|
|
struct Param: TypeAscriptionOwner, AttrsOwner {
|
|
|
|
Pat,
|
|
|
|
}
|
|
|
|
struct UseItem: AttrsOwner, VisibilityOwner {
|
|
|
|
UseTree,
|
|
|
|
}
|
|
|
|
struct UseTree {
|
|
|
|
Path, UseTreeList, Alias
|
|
|
|
}
|
|
|
|
struct Alias: NameOwner { }
|
|
|
|
struct UseTreeList { use_trees: [UseTree] }
|
|
|
|
struct ExternCrateItem: AttrsOwner, VisibilityOwner {
|
|
|
|
NameRef, Alias,
|
|
|
|
}
|
|
|
|
struct ArgList {
|
|
|
|
args: [Expr],
|
|
|
|
}
|
|
|
|
struct Path {
|
|
|
|
segment: PathSegment,
|
|
|
|
qualifier: Path,
|
|
|
|
}
|
|
|
|
struct PathSegment {
|
|
|
|
NameRef, TypeArgList, ParamList, RetType, PathType,
|
|
|
|
}
|
|
|
|
struct TypeArgList {
|
|
|
|
type_args: [TypeArg],
|
|
|
|
lifetime_args: [LifetimeArg],
|
|
|
|
assoc_type_args: [AssocTypeArg],
|
2020-01-06 16:59:03 -06:00
|
|
|
const_arg: [ConstArg],
|
2020-01-03 13:37:02 -06:00
|
|
|
}
|
|
|
|
struct TypeArg { TypeRef }
|
|
|
|
struct AssocTypeArg { NameRef, TypeRef }
|
|
|
|
struct LifetimeArg {}
|
2020-01-06 16:59:03 -06:00
|
|
|
struct ConstArg { Literal, BlockExpr }
|
2020-01-03 13:37:02 -06:00
|
|
|
|
|
|
|
struct MacroItems: ModuleItemOwner, FnDefOwner { }
|
|
|
|
|
|
|
|
struct MacroStmts {
|
|
|
|
statements: [Stmt],
|
|
|
|
Expr,
|
|
|
|
}
|
|
|
|
},
|
|
|
|
enums: &ast_enums! {
|
|
|
|
enum NominalDef: NameOwner, TypeParamsOwner, AttrsOwner {
|
|
|
|
StructDef, EnumDef, UnionDef,
|
|
|
|
}
|
|
|
|
|
|
|
|
enum TypeRef {
|
|
|
|
ParenType,
|
|
|
|
TupleType,
|
|
|
|
NeverType,
|
|
|
|
PathType,
|
|
|
|
PointerType,
|
|
|
|
ArrayType,
|
|
|
|
SliceType,
|
|
|
|
ReferenceType,
|
|
|
|
PlaceholderType,
|
|
|
|
FnPointerType,
|
|
|
|
ForType,
|
|
|
|
ImplTraitType,
|
|
|
|
DynTraitType,
|
|
|
|
}
|
|
|
|
|
|
|
|
enum ModuleItem: AttrsOwner, VisibilityOwner {
|
|
|
|
StructDef,
|
|
|
|
UnionDef,
|
|
|
|
EnumDef,
|
|
|
|
FnDef,
|
|
|
|
TraitDef,
|
|
|
|
TypeAliasDef,
|
2020-02-29 14:24:40 -06:00
|
|
|
ImplDef,
|
2020-01-03 13:37:02 -06:00
|
|
|
UseItem,
|
|
|
|
ExternCrateItem,
|
|
|
|
ConstDef,
|
|
|
|
StaticDef,
|
|
|
|
Module,
|
|
|
|
}
|
|
|
|
|
|
|
|
enum ImplItem: AttrsOwner {
|
|
|
|
FnDef, TypeAliasDef, ConstDef,
|
|
|
|
}
|
|
|
|
|
|
|
|
enum Expr {
|
|
|
|
TupleExpr,
|
|
|
|
ArrayExpr,
|
|
|
|
ParenExpr,
|
|
|
|
PathExpr,
|
|
|
|
LambdaExpr,
|
|
|
|
IfExpr,
|
|
|
|
LoopExpr,
|
|
|
|
ForExpr,
|
|
|
|
WhileExpr,
|
|
|
|
ContinueExpr,
|
|
|
|
BreakExpr,
|
|
|
|
Label,
|
|
|
|
BlockExpr,
|
|
|
|
ReturnExpr,
|
|
|
|
MatchExpr,
|
|
|
|
RecordLit,
|
|
|
|
CallExpr,
|
|
|
|
IndexExpr,
|
|
|
|
MethodCallExpr,
|
|
|
|
FieldExpr,
|
|
|
|
AwaitExpr,
|
|
|
|
TryExpr,
|
|
|
|
TryBlockExpr,
|
|
|
|
CastExpr,
|
|
|
|
RefExpr,
|
|
|
|
PrefixExpr,
|
|
|
|
RangeExpr,
|
|
|
|
BinExpr,
|
|
|
|
Literal,
|
|
|
|
MacroCall,
|
|
|
|
BoxExpr,
|
|
|
|
}
|
|
|
|
|
|
|
|
enum Pat {
|
2020-02-09 12:57:01 -06:00
|
|
|
OrPat,
|
|
|
|
ParenPat,
|
2020-01-03 13:37:02 -06:00
|
|
|
RefPat,
|
|
|
|
BoxPat,
|
|
|
|
BindPat,
|
|
|
|
PlaceholderPat,
|
|
|
|
DotDotPat,
|
|
|
|
PathPat,
|
|
|
|
RecordPat,
|
|
|
|
TupleStructPat,
|
|
|
|
TuplePat,
|
|
|
|
SlicePat,
|
|
|
|
RangePat,
|
|
|
|
LiteralPat,
|
|
|
|
}
|
|
|
|
|
|
|
|
enum AttrInput { Literal, TokenTree }
|
|
|
|
enum Stmt { ExprStmt, LetStmt }
|
|
|
|
},
|
|
|
|
};
|