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Diffstat (limited to 'cgil/rlhc-go.lm')
| -rw-r--r-- | cgil/rlhc-go.lm | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/cgil/rlhc-go.lm b/cgil/rlhc-go.lm new file mode 100644 index 00000000..21aa1cee --- /dev/null +++ b/cgil/rlhc-go.lm @@ -0,0 +1,453 @@ +include 'ril.lm' + +namespace out_go + 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 string / + '"' ( [^"\\] | '\\' any ) * '"' | + "'" ( [^'\\] | '\\' any ) * "'" + / + + ignore + /[ \t\v\r\n]+/ + end + + def item + [comment] + | [id] + | [number] + | [symbol] + | [string] + | [`{ _IN_ item* _EX_ `} ] + + def out_go + [_IN_ _EX_ item*] +end + + + +namespace go_gen + + global _: parser<out_go::out_go> + + void tok_list( TL: host::tok* ) + { + for Tok: host::tok in repeat(TL) { + switch Tok + case Stmt { + "{ + stmt_list( StmtList ) + "} + } + case Expr { + "([expr( Expr )])" + } + case Escape { + Str: str = $Tok + "[Str.suffix( 1 )]" + } + default { + [Tok] + } + } + } + + void embedded_host( EmbeddedHost: embedded_host ) + { + switch EmbeddedHost + case Expr + { + ['(' tok_list( TL ) ')'] + } + case Stmt + { + ['{' tok_list( TL ) '}\n'] + } + case Bare + { + [tok_list( TL )] + } + } + + void expr_factor( ExprFactor: expr_factor ) + { + switch ExprFactor + case EmbeddedHost + { + [embedded_host(embedded_host)] + } + case Paren + { + ['( ' expr(expr) ' )'] + } + case ArraySub + { + [ident '[ ' expr( expr ) ' ]'] + } + case Offset + { + "int([expr(expr )]) + } + case Deref + { + [ident '[ ' expr( expr ) ' ]' ] + } + case True + { + "true" + } + case False + { + "false" + } + case Nil + { + "0" + } + case Access + { + embedded_host(embedded_host) + expr_factor(_expr_factor) + } + case Cast + { + [type(type) '( ' expr_factor(_expr_factor) ' )' ] + } + default { + # Catches cases not specified + [ExprFactor] + } + } + + void lvalue( ExprFactor: lvalue ) + { + switch ExprFactor + case [EH: embedded_host] + { + [embedded_host(EH)] + } + case [ident `[ TL: expr `]] + { + [ident '[' expr( TL ) ']'] + } + case [E1: embedded_host `-> E2: lvalue] + { + embedded_host( E1 ) + lvalue( E2 ) + } + default { + # Catches cases not specified + [ExprFactor] + } + } + + void expr_factor_op( ExprFactorOp: expr_factor_op ) + { + switch ExprFactorOp + case [B: `! expr_factor_op] + { + ['! ' expr_factor_op( _expr_factor_op )] + } + case [T: `~ expr_factor_op] + { + ['^ ' expr_factor_op( _expr_factor_op )] + } + 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( _expr_bitwise ) ' & ' expr_factor_op( 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( _expr_mult ) ' * ' expr_bitwise( expr_bitwise )] + } + case [expr_bitwise] + { + [expr_bitwise( expr_bitwise )] + } + } + + void expr_add( ExprAdd: expr_add ) + { + switch ExprAdd + case [expr_add Op: add_op expr_mult] + { + [expr_add( _expr_add ) ' ' Op ' ' expr_mult( 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( _expr_shift ) ' ' Op ' ' expr_add( expr_add )] + } + case [expr_add] + { + [expr_add( expr_add )] + } + } + + void expr_test( ExprTest: expr_test ) + { + switch ExprTest + case [expr_test Op: test_op expr_shift] + { + [expr_test( _expr_test ) ' ' Op ' ' expr_shift( 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 + ['int8'] + case S16 + ['int16'] + case S32 + ['int32'] + case S64 + ['int64'] + case S128 + ['long long'] + default + [Type] + } + + void number( Number: number ) + { + switch Number + case Unsigned + [uint] + default + [Number] + } + + void num_list( NumList: num_list ) + { + number( NumList.number ) + for CommaNum: comma_num in NumList { + [', ' number( CommaNum.number )] + } + } + + # Go must have {} around if and for statements. We strip any blocks from + # these statments and force our own. + void strip_block_stmt( Stmt: stmt ) + { + if match Stmt [`{ StmtList: stmt* `}] + stmt_list(StmtList) + else + stmt( Stmt ) + } + + void stmt( Stmt: stmt ) + { + switch Stmt + case [EH: embedded_host] + { + [embedded_host(EH)] + } + case [A: static_array] { + "var [A.ident] = \[\] " + "[type(A.type)] { [num_list(A.num_list)] } + } + case [V: static_value] { + "var [V.ident] [type(V.type)] = [V.number] + "var _ = [V.ident] + } + case [ + 'if' O: `( IfExpr: expr C: `) IfStmt: stmt + ] { + # if-statements with only the if clause can go out as an if. + "if [expr(IfExpr)] { + strip_block_stmt(IfStmt) + "} + } + case [ + 'if' O: `( IfExpr: expr C: `) IfStmt: stmt + ElseIfClauseList: else_if_clause* ElseClauseOpt: else_clause? + ] { + # If the if-statement has more than just an if clause it goes out as a switch. + "if [expr( IfExpr )] { + strip_block_stmt( IfStmt ) + + for ElseIfClause: else_if_clause in repeat( ElseIfClauseList ) { + match ElseIfClause + ['else if (' ElseIfExpr: expr ')' ElseIfStmt: stmt] + + "} else if [expr(ElseIfExpr)] { + strip_block_stmt(ElseIfStmt) + } + + if ( match ElseClauseOpt ['else' ElseStmt: stmt] ) { + "} else { + strip_block_stmt(ElseStmt) + } + + "} + } + case ["while ( TRUE )" WhileStmt: stmt] { + "for { + strip_block_stmt(WhileStmt) + "} + } + case ['while' '(' WhileExpr: expr ')' WhileStmt: stmt] { + "for [expr(WhileExpr)] { + strip_block_stmt(WhileStmt) + "} + } + case ['switch' '(' SwitchExpr: expr ')' '{' StmtList: stmt* '}'] { + "switch [expr(SwitchExpr)] { + stmt_list(StmtList) + "} + } + case [ExprExpr: expr `;] { + [expr(ExprExpr) ';'] + } + case [B: block] { + "{ + stmt_list(B.StmtList) + "} + } + case [D: declaration] + { + "var [D.ident] [type(D.type)]" + + if match D.opt_init ['=' Expr: expr] { + " = [expr(Expr)]" + } + ['\n'] + } + case [ES: export_stmt] + { + "#define [ES.ident] [number(ES.number)] + } + case [fallthrough] + { + "fallthrough + } + case [Index: index_stmt] + { + "var [Index.ident] int" + + if match Index.opt_init ['=' Expr: expr] { + " = [expr(Expr)]" + } + + ['\n'] + } + case [CB: case_block] + { + "case [expr( CB.expr )]: + stmt_list( CB._repeat_stmt ) + } + case [DB: default_block] + { + "default: + stmt_list( DB._repeat_stmt ) + } + case [CL: case_label] + { + "case [expr( CL.expr )]: + } + case [AS: assign_stmt] + { + "[lvalue(AS.LValue) AS.assign_op expr(AS.expr)]; + } + default { + # catches unspecified cases + "[Stmt] + } + } + + void stmt_list( StmtList: stmt* ) + { + for Stmt: stmt in repeat( StmtList ) + stmt( Stmt ) + } + + void trans( Output: stream, Start: start ) + { + _ = new parser<out_go::out_go>() + Input: _input = _->gets() + Input->auto_trim(true) + + if ( Start.opt_bom.bom ) + send Output [Start.opt_bom.bom] + + stmt_list( Start._repeat_stmt ) + + GO: out_go::out_go = _->finish() + + if GO { + send Output + [GO] + } + else { + send stderr + "failed to parse output: [_->error] + } + + } +end + +void trans( Output: stream, Start: start ) +{ + go_gen::trans( Output, Start ) +} + +include 'rlhc-main.lm' |