1 files changed, 534 insertions, 0 deletions
diff --git a/src/cgil/rlhc-rust.lm b/src/cgil/rlhc-rust.lm
new file mode 100644
index 00000000..03f8b688
--- /dev/null
+++ b/src/cgil/rlhc-rust.lm
@@ -0,0 +1,534 @@
+include 'ril.lm'
+
+namespace rust_out
+	token _IN_ /''/
+	token _EX_ /''/
+
+	lex
+		token comment /
+			'//' any* :> '\n' |
+			'/*' any* :>> '*/'
+		/
+
+		token id
+			/[a-zA-Z_][a-zA-Z_0-9]*/
+
+		token number /
+			[0-9]+
+		/
+
+		token symbol /
+			'!' | '#' | '$' | '%' | '&' | '(' | ')' | '*' |
+			'+' | ',' | '-' | '.' | '/' | ':' | ';' | '<' |
+			'=' | '>' | '?' | '@' | '[' | ']' | '^' | '|' |
+			'~' /
+
+		literal `{ `}
+
+		token lifetime / "'" id /
+
+		token string /
+				'"' ( [^"\\] | '\\' any ) * '"' |
+				"'" ( [^'\\] | '\\' any ) "'"
+			/
+
+		ignore
+			/[ \t\v\r\n]+/
+	end
+
+	def item
+		[comment]
+	|	[id]
+	|	[number]
+	|	[symbol]
+	|	[string]
+	|	[lifetime]
+	|	[`{ _IN_ item* _EX_ `} ]
+
+	def rust_out
+		[_IN_ _EX_ item*]
+end
+
+namespace rust_gen
+
+	global Parser: parser<rust_out::rust_out>
+
+	void tok_list( TL: host::tok* )
+	{
+		for Tok: host::tok in repeat(TL) {
+			switch Tok
+			case [host::`${ StmtList: stmt* host::`}$]
+				send Parser "{[stmt_list( StmtList )]}"
+			case [host::`={ Expr: expr host::`}=]
+				send Parser "([expr( Expr )])"
+			case [E: escape] {
+				Str: str = $E
+				send Parser
+					"[Str.suffix( 1 )]"
+			}
+			default
+				send Parser [Tok]
+		}
+	}
+
+	void embedded_host( EmbeddedHost: embedded_host )
+	{
+		switch EmbeddedHost
+		case [`host `( string `, uint `) `={ TL: host::tok* host::`}=]
+		{
+			send Parser
+				"([tok_list( TL )])"
+		}
+		case [`host `( string `, uint `) `${ TL: host::tok* host::`}$]
+		{
+			send Parser 
+				"{[tok_list( TL )]}
+		}
+		case [`host `( string `, uint `) `@{ TL: host::tok* host::`}@]
+		{
+			send Parser
+				[tok_list( TL )]
+		}
+	}
+
+	void expr_factor( ExprFactor: expr_factor )
+	{
+		switch ExprFactor
+		case [EH: embedded_host]
+		{
+			send Parser
+				[embedded_host( EH )]
+		}
+		case [O:`( TL: expr C: `)]
+		{
+			send Parser
+				[O expr(TL) C]
+		}
+		case [I: ident `[ E: expr `]]
+		{
+			send Parser
+				"[I]\[([expr( E )]) as usize\]"
+		}
+		case ['offset' '(' ident ',' expr ')']
+		{
+			send Parser
+				"( [expr( ExprFactor.expr )] ) as i32"
+		}
+		case ['deref' '(' I: ident ',' E: expr ')']
+		{
+			send Parser
+				"[I]\[([expr( E )]) as usize\]
+		}
+		case [T: `TRUE]
+		{
+			T.data = 'true'
+			send Parser [T]
+		}
+		case [F: `FALSE]
+		{
+			F.data = 'false'
+			send Parser [F]
+		}
+		case [N: `nil]
+		{
+			N.data = '0'
+			send Parser [N]
+		}
+		case [Number: number]
+		{
+			number( Number )
+		}
+		case [E1: embedded_host `-> E2: expr_factor]
+		{
+			# The accessor operator is contained wihtin the lhs.
+			embedded_host( E1 )
+			expr_factor( E2 )
+		}
+		case [`cast `( T: type `) E: expr_factor]
+		{
+			send Parser
+				"( [expr_factor( E )] ) as [type(T)]"
+		}
+		case [I: ident `[ E: expr `] `. F: ident] {
+			send Parser
+				[^I '_' ^F '[' expr(E) ' as usize]']
+		}
+		default {
+			# Catches cases not specified
+			send Parser [ExprFactor]
+		}
+	}
+
+	void lvalue( ExprFactor: lvalue )
+	{
+		switch ExprFactor
+		case [EH: embedded_host]
+		{
+			send Parser
+				[embedded_host( EH )]
+		}
+		case [I: ident O: `[ E: expr C: `]]
+		{
+			send Parser
+				"[I]\[([expr( E )]) as usize\]
+		}
+		case [E1: embedded_host `-> E2: lvalue]
+		{
+			# The accessor operator is contained wihtin the lhs.
+			embedded_host( E1 )
+			lvalue( E2 )
+		}
+		case [I: ident `[ E: expr `] `. F: ident] {
+			send Parser
+				[^I '_' ^F '[' expr(E) ' as usize]']
+		}
+		default {
+			# Catches cases not specified
+			send Parser [ExprFactor]
+		}
+	}
+
+	void expr_factor_op( ExprFactorOp: expr_factor_op )
+	{
+		switch ExprFactorOp
+		case [B: `! expr_factor_op]
+		{
+			send Parser [B]
+			expr_factor_op( ExprFactorOp._expr_factor_op )
+		}
+		case [`~ EFO: expr_factor_op]
+		{
+			send Parser
+				"![expr_factor_op( EFO )]
+		}
+		case [expr_factor]
+		{
+			expr_factor( ExprFactorOp.expr_factor )
+		}
+	}
+
+	void expr_bitwise( ExprBitwise: expr_bitwise )
+	{
+		switch ExprBitwise
+		case [expr_bitwise A: `& expr_factor_op]
+		{
+			expr_bitwise( ExprBitwise._expr_bitwise )
+			send Parser [A]
+			expr_factor_op( ExprBitwise.expr_factor_op )
+		}
+		case [expr_factor_op]
+		{
+			expr_factor_op( ExprBitwise.expr_factor_op )
+		}
+	}
+
+	void expr_mult( ExprMult: expr_mult )
+	{
+		switch ExprMult
+		case [expr_mult T: `* expr_bitwise]
+		{
+			expr_mult( ExprMult._expr_mult )
+			send Parser [T]
+			expr_bitwise( ExprMult.expr_bitwise )
+		}
+		case [expr_bitwise]
+		{
+			expr_bitwise( ExprMult.expr_bitwise )
+		}
+	}
+
+	void expr_add( ExprAdd: expr_add )
+	{
+		switch ExprAdd
+		case [expr_add Op: add_op expr_mult]
+		{
+			expr_add( ExprAdd._expr_add )
+			send Parser [Op]
+			expr_mult( ExprAdd.expr_mult )
+		}
+		case [expr_mult]
+		{
+			expr_mult( ExprAdd.expr_mult )
+		}
+	}
+
+	void expr_shift( ExprShift: expr_shift )
+	{
+		switch ExprShift
+		case [expr_shift Op: shift_op expr_add]
+		{
+			expr_shift( ExprShift._expr_shift )
+			send Parser [Op]
+			expr_add( ExprShift.expr_add )
+		}
+		case [expr_add]
+		{
+			expr_add( ExprShift.expr_add )
+		}
+	}
+
+	void expr_test( ExprTest: expr_test )
+	{
+		switch ExprTest
+		case [expr_test Op: test_op expr_shift]
+		{
+			expr_test( ExprTest._expr_test )
+			send Parser [Op]
+			expr_shift( ExprTest.expr_shift )
+		}
+		case [expr_shift]
+		{
+			expr_shift( ExprTest.expr_shift )
+		}
+	}
+
+	void expr( Expr: expr )
+	{
+		expr_test( Expr.expr_test )
+	}
+
+	void type( Type: type )
+	{
+		switch Type
+		case "s8"
+			send Parser ['i8 ']
+		case "s16"
+			send Parser ['i16 ']
+		case "s32"
+			send Parser ['i32 ']
+		case "s64"
+			send Parser ['i64 ']
+		case "s128"
+			send Parser ['i128']
+		case "int"
+			send Parser ['i32']
+		case "uint"
+			send Parser ['u32']
+		default
+			send Parser [Type]
+	}
+
+	void number( Number: number )
+	{
+		switch Number
+		case [`u `( uint `) ]
+			send Parser "[Number.uint]"
+		default
+			send Parser [Number]
+	}
+
+	void num_list( NumList: num_list )
+	{
+		for Number: number in NumList
+			send Parser "[number( Number )], "
+		send Parser "0"
+	}
+
+	void stmt( Stmt: stmt )
+	{
+		switch Stmt
+		case [EH: embedded_host]
+		{
+			send Parser
+				[embedded_host( EH )]
+		}
+		case [A: static_array] {
+			Length: int = 1
+			for Number: number in A.num_list
+				Length = Length + 1
+
+			send Parser
+				"static [A.ident]: \[[type(A.type)]; [Length]\] = \[ [num_list(A.num_list)] \];
+		}
+		case [V: static_value] {
+			send Parser
+				"static [V.ident]: i32 = [V.number];
+		}
+		case [D: declaration] {
+			send Parser
+				"let mut [D.ident] "
+
+			switch D.opt_init
+			case [E: `= expr] {
+				send Parser
+					"= [expr(D.opt_init.expr)];
+			}
+			default {
+				send Parser
+					"= 0;
+			}
+		}
+		case [Index: index_stmt]
+		{
+			send Parser
+				"let mut [Index.ident] :i32"
+
+			switch Index.opt_init
+			case [E: `= expr] {
+				send Parser
+					"= [expr(Index.opt_init.expr)];
+			}
+			default {
+				send Parser
+					"= 0;
+			}
+		}
+		case [
+				'if' `( IfExpr: expr `) IfStmt: stmt
+				ElseIfClauseList: else_if_clause* ElseClauseOpt: else_clause?
+		] {
+			send Parser
+				"if ( [expr(IfExpr)] ) {
+				"	[stmt(IfStmt)]
+				"}
+
+			for ElseIfClause: else_if_clause in repeat( ElseIfClauseList ) {
+				match ElseIfClause
+					['else if (' ElseIfExpr: expr ')' ElseIfStmt: stmt]
+
+				send Parser
+					"else if ( [expr(ElseIfExpr)] ) {
+					"	[stmt(ElseIfStmt)]
+					"}
+			}
+
+			if ( match ElseClauseOpt ['else' ElseStmt: stmt] ) {
+				send Parser
+					"else {
+					"	[stmt(ElseStmt)]
+					"}
+			}
+		}
+		case [`continue CL: ident `;] {
+			send Parser
+				"continue '[CL];
+		}
+		case [`break BL: ident `;] {
+			send Parser
+				"break '[BL];
+		}
+		case [BL: break_label? 'while' '(' WhileExpr: expr ')' '{' StmtList: stmt* '}' ] {
+			if match BL [bl: break_label]
+				send Parser "'[bl.ident]: "
+				
+			send Parser
+				"while ( [expr(WhileExpr)] ) {
+				"	[stmt_list(StmtList)]
+				"}
+		}
+		case [`switch `( SwitchExpr: expr `) `{ StmtList: stmt* `}] {
+			send Parser
+				"match ( [expr(SwitchExpr)] ) {
+				"	[stmt_list(StmtList)]
+
+			NeedDef: bool = true
+			for Stmt: stmt in repeat(StmtList) {
+				if match Stmt [default_block]
+					NeedDef = false
+			}
+
+			if NeedDef {
+				send Parser
+					"	_ => {}
+			}
+
+			send Parser
+				"}
+		}
+		case [ExprExpr: expr Semi: `;] {
+			send Parser
+				[expr(ExprExpr) Semi]
+		}
+		case [L: `{ TL: stmt* R: `}] {
+			send Parser
+				[L stmt_list(TL) R]
+		}
+		case [
+			TypeList: opt_const Type: type
+			Ident: ident OptInit: opt_init Semi: `;
+		]
+		{
+			send Parser
+				[TypeList type(Type) Ident]
+
+			if match OptInit [E: `= expr] {
+				send Parser
+					[E expr(OptInit.expr)]
+			}
+
+			send Parser
+				[Semi]
+		}
+		case [Export: export_stmt]
+		{
+			send Parser
+				"#define [Export.ident] [number(Export.number)] 
+		}
+		case ['fallthrough' ';']
+		{
+			# Nothing needed here.
+		}
+		case [case_block]
+		{
+			send Parser
+				"[expr( Stmt.case_block.expr )] => {
+				"[stmt_list( Stmt.case_block._repeat_stmt )]
+				"}
+		}
+		case [default_block]
+		{
+			send Parser
+				"_ => {
+				"[stmt_list( Stmt.default_block._repeat_stmt )]
+				"}
+		}
+		case [case_label]
+		{
+			send Parser
+				"case [expr( Stmt.case_label.expr )]:
+		}
+		case [AS: assign_stmt]
+		{
+			send Parser
+				"[lvalue(AS.LValue) AS.assign_op expr(AS.expr)];
+		}
+		default {
+			# catches unspecified cases
+			send Parser [Stmt]
+		}
+	}
+
+	void stmt_list( StmtList: stmt* )
+	{
+		for Stmt: stmt in repeat( StmtList )
+			stmt( Stmt )
+	}
+
+	void trans( Output: stream, Start: start )
+	{
+		Parser = new parser<rust_out::rust_out>()
+
+		if ( Start.opt_bom.bom )
+			send Output [Start.opt_bom.bom]
+
+		stmt_list( Start._repeat_stmt )
+
+		CO: rust_out::rust_out = Parser->finish()
+
+		if CO {
+			send Output
+				[CO]
+		}
+		else {
+			send stderr
+				"failed to parse output: [Parser->error]
+		}
+	}
+end
+
+void trans( Output: stream, Start: start )
+{
+	rust_gen::trans( Output, Start )
+}
+
+include 'rlhc-main.lm'