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Parse builtin#asm expressions

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This commit is contained in:
Lukas Wirth 2024-09-01 13:43:05 +02:00
parent 50882fbfa2
commit 86658c66b4
21 changed files with 865 additions and 31 deletions
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27
crates/syntax/rust.ungram
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@ -391,8 +391,33 @@ Expr =
OffsetOfExpr =
Attr* 'builtin' '#' 'offset_of' '(' Type ',' fields:(NameRef ('.' NameRef)* ) ')'
// asm := "asm!(" format_string *("," format_string) *("," operand) [","] ")"
// global_asm := "global_asm!(" format_string *("," format_string) *("," operand) [","] ")"
// format_string := STRING_LITERAL / RAW_STRING_LITERAL
AsmExpr =
Attr* 'builtin' '#' 'asm' '(' Expr ')'
Attr* 'builtin' '#' 'asm' '(' template:(Expr (',' Expr)*) (AsmOperand (',' AsmOperand)*)? ','? ')'
// operand_expr := expr / "_" / expr "=>" expr / expr "=>" "_"
AsmOperandExpr = in_expr:Expr ('=>' out_expr:Expr)?
// dir_spec := "in" / "out" / "lateout" / "inout" / "inlateout"
AsmDirSpec = 'in' | 'out' | 'lateout' | 'inout' | 'inlateout'
// reg_spec := <register class> / "\"" <explicit register> "\""
AsmRegSpec = '@string' | NameRef
// reg_operand := [ident "="] dir_spec "(" reg_spec ")" operand_expr
AsmRegOperand = (Name '=')? AsmDirSpec '(' AsmRegSpec ')' AsmOperandExpr
// clobber_abi := "clobber_abi(" <abi> *("," <abi>) [","] ")"
AsmClobberAbi = 'clobber_abi' '(' ('@string' (',' '@string')* ','?) ')'
// option := "pure" / "nomem" / "readonly" / "preserves_flags" / "noreturn" / "nostack" / "att_syntax" / "raw"
AsmOption = 'pure' | 'nomem' | 'readonly' | 'preserves_flags' | 'noreturn' | 'nostack' | 'att_syntax' | 'raw' | 'may_unwind'
// options := "options(" option *("," option) [","] ")"
AsmOptions = 'options' '(' AsmOption *(',' AsmOption) ','? ')'
// operand := reg_operand / clobber_abi / options
AsmOperand = AsmRegOperand | AsmClobberAbi | AsmOptions | AsmLabel
AsmLabel = 'label' BlockExpr
AsmSym = 'sym' Expr
AsmConst = 'const' Expr
FormatArgsExpr =
Attr* 'builtin' '#' 'format_args' '('