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ruby.g
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header {
package com.xruby.compiler.parser;
}
/**
* Copyright 2005-2007 Xue Yong Zhi
* Distributed under the BSD License
*/
//----------------------------------------------------------------------------
// The Ruby parser. Do not use this one, use RubyParser instead!
//----------------------------------------------------------------------------
class RubyParserBase extends Parser;
options {
k = 1; // Will add prediction manually if we need k > 1.
exportVocab=Ruby;
codeGenMakeSwitchThreshold = 2;
codeGenBitsetTestThreshold = 999;
defaultErrorHandler = false;
buildAST = true;
//analyzerDebug = true;
}
tokens {
// "imaginary" tokens
RPAREN_IN_METHOD_DEFINATION;
BODY;
CALL;
ARG;
COMPSTMT;
SYMBOL;
BLOCK;
MULTIPLE_ASSIGN;
MULTIPLE_ASSIGN_WITH_EXTRA_COMMA;
BLOCK_ARG;
BLOCK_ARG_WITH_EXTRA_COMMA;
MRHS;
NESTED_LHS;
SINGLETON_METHOD;
STRING;
}
{
private int can_be_command_ = 0;
private int is_in_method_definition = 0;
protected void enterScope() {assert(false);}
protected void enterBlockScope() {assert(false);}
protected void leaveScope() {assert(false);}
protected void addVariable(Token id) {assert(false);}
protected void setIsInNestedMultipleAssign(boolean v) {assert(false);}
protected void tellLexerWeHaveFinishedParsingMethodparameters() {assert(false);}
protected void tellLexerWeHaveFinishedParsingSymbol() {assert(false);}
protected void tellLexerWeHaveFinishedParsingStringExpressionSubstituation() {assert(false);}
protected void tellLexerWeHaveFinishedParsingRegexExpressionSubstituation() {assert(false);}
protected void tellLexerWeHaveFinishedParsingHeredocExpressionSubstituation() {assert(false);}
boolean isNotAssign(int token_type) {
switch (token_type) {
case ASSIGN:
case ASSIGN_WITH_NO_LEADING_SPACE:
case PLUS_ASSIGN:
case MINUS_ASSIGN:
case STAR_ASSIGN:
case DIV_ASSIGN:
case MOD_ASSIGN:
case POWER_ASSIGN:
case BAND_ASSIGN:
case BXOR_ASSIGN:
case BOR_ASSIGN:
case LEFT_SHIFT_ASSIGN:
case RIGHT_SHIFT_ASSIGN:
case LOGICAL_AND_ASSIGN:
case LOGICAL_OR_ASSIGN:
return false;
default:
return true;
}
}
}
program
: (compoundStatement)? EOF!
;
compoundStatement
{boolean empty = true;}
: (terminal! (statements {empty = false;})?
| statements {empty = false;})
{if (!empty) #compoundStatement = #(#[COMPSTMT, "COMPSTMT"], #compoundStatement);}
;
statements
: statement
(
terminal
{
if ( (EOF == LA(1)) || //script end
(RCURLY == LA(1)) || (LITERAL_end == LA(1)) || //block end
(RPAREN == LA(1)) ||
(LITERAL_else == LA(1)) || (LITERAL_elsif == LA(1)) ||
(LITERAL_rescue == LA(1)) || (LITERAL_ensure == LA(1)) ||
(LITERAL_when == LA(1))
)
break;
}
statement
)*
;
terminal
: SEMI!
| LINE_BREAK!
;
statement
: body:statementWithoutModifier
(!IF_MODIFIER^ if_condition:expression {#statement = #(#[LITERAL_if, "if"], if_condition, #(#[COMPSTMT, "COMPSTMT"], #body));}
|!UNLESS_MODIFIER^ unless_condition:expression {#statement = #(#[LITERAL_unless, "unless"], unless_condition, #(#[COMPSTMT, "COMPSTMT"], #body));}
|!WHILE_MODIFIER^ while_condition:expression {#statement = #(#WHILE_MODIFIER, while_condition, #(#[COMPSTMT, "COMPSTMT"], #body));}
|!UNTIL_MODIFIER^ until_condition:expression {#statement = #(#UNTIL_MODIFIER, until_condition, #(#[COMPSTMT, "COMPSTMT"], #body));}
|!RESCUE_MODIFIER^ rescue_condition:expression {#statement = #(#[LITERAL_begin, "begin"], #(#[BODY, "BODY"], #(#[COMPSTMT, "COMPSTMT"], #body), #[LITERAL_rescue, "rescue"], rescue_condition));}
)*
;
statementWithoutModifier
{
boolean is_parallel_assignment = false;
boolean has_extra_comma = false;
}
: (aliasStatement
| undefStatement
| keyword_BEGIN LCURLY_BLOCK (compoundStatement)? RCURLY {if (is_in_method_definition>0) {throw new RecognitionException("BEGIN in method");}}
| keyword_END LCURLY_BLOCK (compoundStatement)? RCURLY {if (is_in_method_definition>0) {throw new RecognitionException("END in method");}}
| expression
(options{greedy=true;}:
COMMA!
{if (ASSIGN == LA(1) || ASSIGN_WITH_NO_LEADING_SPACE == LA(1)) {has_extra_comma=true;break;}}
(seen_star:REST_ARG_PREFIX)?
(mlhs_item)? {if (null != seen_star) break;}
{is_parallel_assignment = true;}
)*
( (ASSIGN!|ASSIGN_WITH_NO_LEADING_SPACE!)
(options{greedy=true;}:LINE_BREAK!)?
mrhs
{is_parallel_assignment = true;}
)?
| REST_ARG_PREFIX
mlhs_item
(ASSIGN!|ASSIGN_WITH_NO_LEADING_SPACE!)
(options{greedy=true;}:LINE_BREAK!)?
mrhs
{is_parallel_assignment = true;}
)
{
if (is_parallel_assignment && !has_extra_comma) {
#statementWithoutModifier = #(#[MULTIPLE_ASSIGN, "MULTIPLE_ASSIGN"], #statementWithoutModifier);
} else if (is_parallel_assignment && has_extra_comma) {
#statementWithoutModifier = #(#[MULTIPLE_ASSIGN_WITH_EXTRA_COMMA, "MULTIPLE_ASSIGN_WITH_EXTRA_COMMA"], #statementWithoutModifier);
}
}
;
protected
lparen
: LPAREN_WITH_NO_LEADING_SPACE!
| LPAREN!
;
//LPAREN can start primaryExpression, have to use syntactic predicate here.
mlhs_item
: (lparen dotColonOrArrayAccess COMMA)=>
lparen {setIsInNestedMultipleAssign(true);}
dotColonOrArrayAccess
(COMMA! {if (RPAREN == LA(1)) break;}
(seen_star:REST_ARG_PREFIX)? dotColonOrArrayAccess {if (null != seen_star) break;}
)+
RPAREN! {setIsInNestedMultipleAssign(false);}
{#mlhs_item = #(#[NESTED_LHS, "NESTED_LHS"], #mlhs_item);}
| dotColonOrArrayAccess
;
mrhs
: (expression (COMMA! {if (ASSIGN == LA(1)||RBRACK == LA(1)) break;} (seen_star:REST_ARG_PREFIX)? expression {if (null != seen_star) break;})*
| REST_ARG_PREFIX expression
)
{#mrhs = #(#[MRHS, "MRHS"], #mrhs);}
;
protected
undef_parameter
: IDENTIFIER (ASSIGN_WITH_NO_LEADING_SPACE)?
| CONSTANT (ASSIGN_WITH_NO_LEADING_SPACE)?
| FUNCTION (ASSIGN_WITH_NO_LEADING_SPACE)?
| symbol
| keywordAsMethodName
| operatorAsMethodname
;
undefStatement
: "undef"^ (options{greedy=true;}:LINE_BREAK!)?
undef_parameter (COMMA! undef_parameter)*
;
aliasStatement
: "alias"^ (options{greedy=true;}:LINE_BREAK!)?
(GLOBAL_VARIABLE (LINE_BREAK!)? GLOBAL_VARIABLE
|undef_parameter (LINE_BREAK!)? undef_parameter
)
;
//TODO should be mlhs
block_vars
{
boolean has_extra_comma = false;
}
: (mlhs_item (COMMA! {if (BOR == LA(1) || LITERAL_in == LA(1)) {has_extra_comma = true; break;}} (seen_star:REST_ARG_PREFIX)? (mlhs_item)? {if (null != seen_star) break;})*
| REST_ARG_PREFIX (dotColonOrArrayAccess)?
)
{ if (has_extra_comma) {
#block_vars = #(#[BLOCK_ARG_WITH_EXTRA_COMMA, "BLOCK_ARG_WITH_EXTRA_COMMA"], #block_vars);
} else {
#block_vars = #(#[BLOCK_ARG, "BLOCK_ARG"], #block_vars);
}
}
;
codeBlock
: ("do"! (options{greedy=true;}:LINE_BREAK!)? {enterBlockScope();}
blockContent
"end"! {leaveScope();}
| LCURLY_BLOCK! {enterBlockScope();}
blockContent
RCURLY! {leaveScope();}
)
{#codeBlock = #(#[BLOCK, "BLOCK"], #codeBlock);}
;
protected
blockContent
: (BOR (block_vars)? BOR!
|LOGICAL_OR
)? (compoundStatement)?
;
symbol
: COLON_WITH_NO_FOLLOWING_SPACE!
(IDENTIFIER (options{greedy=true;}:ASSIGN_WITH_NO_LEADING_SPACE)?
|FUNCTION (options{greedy=true;}:ASSIGN_WITH_NO_LEADING_SPACE)?
|CONSTANT (options{greedy=true;}:ASSIGN_WITH_NO_LEADING_SPACE)?
|GLOBAL_VARIABLE
|INSTANCE_VARIABLE
|CLASS_VARIABLE
|UNARY_PLUS_MINUS_METHOD_NAME
|operatorAsMethodname
|keyword
|string)
{tellLexerWeHaveFinishedParsingSymbol();}
{#symbol = #(#[SYMBOL, "SYMBOL"], #symbol);}
;
/*
* operator expression precedence
* lowest->
* and or
* not
* ? :
* = += -= *= /= %= &= ^= |= <<= >>= **=
* .. ...
* ||
* &&
* <=> == === != =~ !~
* > >= < <=
* | ^
* &
* << >>
* + -
* * / %
* -(unary) +(unary) ! ~
* **
* []
* ::
* highest<-
*/
expression
: andorExpression
;
//and or
andorExpression
: notExpression
(options{greedy=true;/*caused by command*/}:
( "and"^ (options{greedy=true;}:LINE_BREAK!)?
| "or"^ (options{greedy=true;}:LINE_BREAK!)?
)
notExpression
)*
;
//not
notExpression
: "not"^
(options{greedy=true;}:LINE_BREAK!)?
notExpression
| ternaryIfThenElseExpression
;
ternaryIfThenElseExpression
: assignmentExpression
(options{greedy=true;/*caused by command*/}:
QUESTION^ (options{greedy=true;}:LINE_BREAK!)?
ternaryIfThenElseExpression
(COLON!|COLON_WITH_NO_FOLLOWING_SPACE!) (options{greedy=true;}:LINE_BREAK!)?
ternaryIfThenElseExpression
)?
;
//= += -= *= /= %= **= &= ^= |= <<= >>= &&= ||=
assignmentExpression
: rangeExpression
(options{greedy=true;/*caused by command*/}:
{REST_ARG_PREFIX != LA(2)}?
( ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| a:ASSIGN_WITH_NO_LEADING_SPACE^ {{#a.setType(ASSIGN);}} (options{greedy=true;}:LINE_BREAK!)?
| PLUS_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| MINUS_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| STAR_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| DIV_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| MOD_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| POWER_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| BAND_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| BXOR_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| BOR_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| LEFT_SHIFT_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| RIGHT_SHIFT_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| LOGICAL_AND_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
| LOGICAL_OR_ASSIGN^ (options{greedy=true;}:LINE_BREAK!)?
)
ternaryIfThenElseExpression
)*
;
//.. ...
rangeExpression
: logicalOrExpression
(options{greedy=true;/*caused by command*/}:
( INCLUSIVE_RANGE^ (options{greedy=true;}:LINE_BREAK!)?
| EXCLUSIVE_RANGE^ (options{greedy=true;}:LINE_BREAK!)?
)
logicalOrExpression
)*
;
//||
logicalOrExpression
: logicalAndExpression
(options{greedy=true;/*caused by command*/}:
LOGICAL_OR^ (options{greedy=true;}:LINE_BREAK!)?
logicalAndExpression
)*
;
//&&
logicalAndExpression
: equalityExpression
(options{greedy=true;/*caused by command*/}:
LOGICAL_AND^ (options{greedy=true;}:LINE_BREAK!)?
equalityExpression
)*
;
//<=> == === != =~ !~
equalityExpression
: relationalExpression
(options{greedy=true;/*caused by command*/}:
( COMPARE^ (options{greedy=true;}:LINE_BREAK!)?
| EQUAL^ (options{greedy=true;}:LINE_BREAK!)?
| CASE_EQUAL^ (options{greedy=true;}:LINE_BREAK!)?
| NOT_EQUAL^ (options{greedy=true;}:LINE_BREAK!)?
| MATCH^ (options{greedy=true;}:LINE_BREAK!)?
| NOT_MATCH^ (options{greedy=true;}:LINE_BREAK!)?
)
relationalExpression
)*
;
//> >= < <=
relationalExpression
: orExpression
(options{greedy=true;/*caused by command*/}:
( LESS_THAN^ (options{greedy=true;}:LINE_BREAK!)?
| GREATER_THAN^ (options{greedy=true;}:LINE_BREAK!)?
| LESS_OR_EQUAL^ (options{greedy=true;}:LINE_BREAK!)?
| GREATER_OR_EQUAL^ (options{greedy=true;}:LINE_BREAK!)?
)
orExpression
)*
;
//| ^
orExpression
: andExpression
(options{greedy=true;/*caused by command*/}:
( BXOR^ (options{greedy=true;}:LINE_BREAK!)?
| BOR^ (options{greedy=true;}:LINE_BREAK!)?
)
andExpression
)*
;
//&
andExpression
: shiftExpression
(options{greedy=true;/*caused by command*/}:
BAND^ (options{greedy=true;}:LINE_BREAK!)?
shiftExpression
)*
;
//<< >>
shiftExpression
: additiveExpression
(options{greedy=true;/*caused by command*/}:
( LEFT_SHIFT^ (options{greedy=true;}:LINE_BREAK!)?
| RIGHT_SHIFT^ (options{greedy=true;}:LINE_BREAK!)?
)
additiveExpression
)*
;
//+ -
additiveExpression
: multiplicativeExpression
(options{greedy=true;/*caused by command*/}:
( PLUS^ (options{greedy=true;}:LINE_BREAK!)?
| MINUS^ (options{greedy=true;}:LINE_BREAK!)?
)
multiplicativeExpression
)*
;
//* / %
multiplicativeExpression
: powerExpression
(options{greedy=true;/*caused by command*/}:
( STAR^ (options{greedy=true;}:LINE_BREAK!)?
| DIV^ (options{greedy=true;}:LINE_BREAK!)?
| MOD^ (options{greedy=true;}:LINE_BREAK!)?
)
powerExpression
)*
;
//**
powerExpression
: bnotExpression
(options{greedy=true;/*caused by command*/}:
POWER^ (options{greedy=true;}:LINE_BREAK!)?
bnotExpression
)*
;
//! ~
bnotExpression
: ( BNOT (options{greedy=true;}:LINE_BREAK!)?
| NOT (options{greedy=true;}:LINE_BREAK!)?
)*
command
;
command
{
boolean seen_arguments = false;
boolean seen_block = false;
int can_be_command = 0;
}
: dotColonOrArrayAccess {can_be_command = can_be_command_;}
(
{can_be_command > 0}?
methodInvocationArgumentWithoutParen[false] {seen_arguments = true;}
)?
(
{can_be_command > 1}?
codeBlock {seen_block = true;}
)?
{
if (seen_arguments || seen_block || ((2 == can_be_command) && isNotAssign(LA(1))))
{
#command = #(#[CALL, "CALL"], #command);
}
}
| ("return"^|"break"^|"next"^) (options{greedy=true;/*caused by command*/}:methodInvocationArgumentWithoutParen[false])?
;
dotColonOrArrayAccess
: unaryExpression
(options{greedy=true;/*caused by command*/}:
(DOT^ methodCall {can_be_command_ = 3;}
|COLON2^ methodCall {can_be_command_ = 1;}
|LBRACK_ARRAY_ACCESS^
(arrayReferenceArgument)?
RBRACK! {can_be_command_ = 1;}
|EMPTY_ARRAY_ACCESS {can_be_command_ = 1;}
)
)*
;
//-(unary) +(unary)
unaryExpression
: ( UNARY_PLUS^ (options{greedy=true;}:LINE_BREAK!)?
| UNARY_MINUS^ (options{greedy=true;}:LINE_BREAK!)?
)*
(methodCall
|primaryExpressionThatCanNotBeMethodName {can_be_command_ = 0;}
)
;
methodCall
{
can_be_command_ = 1;
boolean seen_arguments = false;
boolean seen_block = false;
boolean is_function = false;
}
: name:primaryExpressionThatCanBeMethodName
{is_function = (2 == can_be_command_);}
(options{greedy=true;/*caused by command*/}:arg:methodInvocationArgumentWithParen {seen_arguments = true;})?
(options{greedy=true;/*caused by command*/}:codeBlock {seen_block = true;})?
{
if (seen_arguments || seen_block || (is_function && (LA(1) == LBRACK_ARRAY_ACCESS)/*this is for a[1]*/))
{
#methodCall = #(#[CALL, "CALL"], #methodCall);
can_be_command_ = 0;
}
}
;
//cruby can accept LPAREN in some situation but gives a warning:
//"don't put space before argument parentheses"
methodInvocationArgumentWithParen
{
//super and super() are different, the former takes implicit parameters from the calling method
boolean has_arg = false;
}
: LPAREN_WITH_NO_LEADING_SPACE!
(methodInvocationArgumentWithoutParen[true] {has_arg = true;})?
(LINE_BREAK!)?
RPAREN!
{if (!has_arg) {#methodInvocationArgumentWithParen = #(#[ARG, "ARG"], #methodInvocationArgumentWithParen);}}
;
methodInvocationArgumentWithoutParen[boolean should_ignore_line_break]
{
boolean seen_star_or_band = false;
}
: (normalMethodInvocationArgument[should_ignore_line_break]
(options{greedy=true;/*caused by command*/}:
COMMA! {if (REST_ARG_PREFIX == LA(1) || BLOCK_ARG_PREFIX == LA(1)) {seen_star_or_band = true;break;}}
normalMethodInvocationArgument[should_ignore_line_break]
)*
({seen_star_or_band}? restMethodInvocationArgument
|{seen_star_or_band}? blockMethodInvocationArgument
)?
| restMethodInvocationArgument
| blockMethodInvocationArgument
)
{#methodInvocationArgumentWithoutParen = #(#[ARG, "ARG"], #methodInvocationArgumentWithoutParen);}
;
normalMethodInvocationArgument[boolean should_ignore_line_break]
: expression (options{greedy=true;/*caused by command*/}:ASSOC^ expression)? ({should_ignore_line_break}? LINE_BREAK!)?
;
restMethodInvocationArgument
: REST_ARG_PREFIX expression (options{greedy=true;/*caused by command*/}:COMMA! blockMethodInvocationArgument)?
;
blockMethodInvocationArgument
: BLOCK_ARG_PREFIX expression
;
predefinedValue
: "nil"
| "true"
| "false"
| "__FILE__"
| "__LINE__"
;
string
: DOUBLE_QUOTE_STRING
| SINGLE_QUOTE_STRING
| STRING_BEFORE_EXPRESSION_SUBSTITUTION^
expression_substituation {tellLexerWeHaveFinishedParsingStringExpressionSubstituation();}
(STRING_BETWEEN_EXPRESSION_SUBSTITUTION expression_substituation {tellLexerWeHaveFinishedParsingStringExpressionSubstituation();})*
STRING_AFTER_EXPRESSION_SUBSTITUTION
;
protected
expression_substituation
: ( LCURLY_BLOCK! (compoundStatement)? RCURLY!
| GLOBAL_VARIABLE
| INSTANCE_VARIABLE
| CLASS_VARIABLE
)
;
regex
: REGEX
| REGEX_BEFORE_EXPRESSION_SUBSTITUTION^
expression_substituation {tellLexerWeHaveFinishedParsingRegexExpressionSubstituation();}
(STRING_BETWEEN_EXPRESSION_SUBSTITUTION expression_substituation {tellLexerWeHaveFinishedParsingRegexExpressionSubstituation();})*
STRING_AFTER_EXPRESSION_SUBSTITUTION
;
command_output
: COMMAND_OUTPUT
| COMMAND_OUTPUT_BEFORE_EXPRESSION_SUBSTITUTION^
expression_substituation {tellLexerWeHaveFinishedParsingStringExpressionSubstituation();}
(STRING_BETWEEN_EXPRESSION_SUBSTITUTION expression_substituation {tellLexerWeHaveFinishedParsingStringExpressionSubstituation();})*
STRING_AFTER_EXPRESSION_SUBSTITUTION
;
heredoc
: HERE_DOC_BEGIN!
(HERE_DOC_CONTENT
|HERE_DOC_BEFORE_EXPRESSION_SUBSTITUTION^
expression_substituation {tellLexerWeHaveFinishedParsingHeredocExpressionSubstituation();}
(HERE_DOC_BETWEEN_EXPRESSION_SUBSTITUTION expression_substituation {tellLexerWeHaveFinishedParsingHeredocExpressionSubstituation();})*
HERE_DOC_AFTER_EXPRESSION_SUBSTITUTION
)
;
literal
: regex
| (options{greedy=true;/*caused by command*/}:string)+{ #literal = #([STRING, "STRING"], #literal); }
| heredoc
| command_output
| symbol
| W_ARRAY
;
numeric
: INTEGER
| HEX
| BINARY
| OCTAL
| FLOAT
| ASCII_VALUE
;
primaryExpressionThatCanBeMethodName
: FUNCTION {can_be_command_ = 2;}
| IDENTIFIER //this is OK: p = 1; p 1
| "self"
| "super" {can_be_command_ = 2;}
| CONSTANT
| LEADING_COLON2 CONSTANT
| "retry"
| "yield" {can_be_command_ = 2;}
| keyword_defined
| "redo"
| EMPTY_ARRAY
| EMPTY_ARRAY_ACCESS
| UNARY_PLUS_MINUS_METHOD_NAME
;
primaryExpressionThatCanNotBeMethodName
: INSTANCE_VARIABLE
| GLOBAL_VARIABLE
| CLASS_VARIABLE
| predefinedValue
| numeric
| literal
| arrayExpression
| hashExpression
| LPAREN^ compoundStatement RPAREN!
| LPAREN_WITH_NO_LEADING_SPACE^ compoundStatement RPAREN!
| ifExpression
| unlessExpression
| whileExpression
| untilExpression
| caseExpression
| forExpression
| exceptionHandlingExpression
| moduleDefinition
| classDefinition
| methodDefinition
;
primaryExpression
: primaryExpressionThatCanNotBeMethodName
| primaryExpressionThatCanBeMethodName
;
arrayReferenceArgument
: keyValuePair
( COMMA! {if (ASSIGN == LA(1)||RBRACK == LA(1)) break;}
(seen_star:REST_ARG_PREFIX)? keyValuePair {if (null != seen_star) break;}
)*
| REST_ARG_PREFIX expression (LINE_BREAK!)?
;
arrayExpression
: LBRACK^
(arrayReferenceArgument)?
RBRACK!
;
keyValuePair
: expression (ASSOC expression)? (LINE_BREAK!)?
;
hashExpression
: LCURLY_HASH^
(
keyValuePair
(options{greedy=true;}:{RCURLY != LA(2)}? COMMA! keyValuePair)*
(COMMA!)?
)?
RCURLY!
;
bodyStatement
: (compoundStatement
("rescue" exceptionList thenOrTermialOrColon (compoundStatement)?)*
("else" (compoundStatement)?)?
("ensure" (compoundStatement)?)?
| ("rescue" exceptionList thenOrTermialOrColon (compoundStatement)?)+
("else" (compoundStatement)?)?
("ensure" (compoundStatement)?)?
| ("ensure" (compoundStatement)?)
)
{#bodyStatement = #(#[BODY, "BODY"], #bodyStatement);}
;
exceptionHandlingExpression
: "begin"^
(bodyStatement)?
"end"!
;
exceptionList
: ((className|INSTANCE_VARIABLE|IDENTIFIER) (COMMA! (className|INSTANCE_VARIABLE|IDENTIFIER))*)? (ASSOC variable)?
| GLOBAL_VARIABLE
;
ifExpression
: "if"^ (LINE_BREAK!)?
expression thenOrTermialOrColon (compoundStatement)?
("elsif" (expression)? thenOrTermialOrColon (compoundStatement)?)*
("else" (compoundStatement)?)?
"end"!
;
unlessExpression
: "unless"^ (LINE_BREAK!)?
expression thenOrTermialOrColon (compoundStatement)?
("else" (compoundStatement)?)?
"end"!
;
caseExpression
: "case"^ (expression)? thenOrTermialOrColon //(compoundStatement)?
(keyword_when mrhs thenOrTermialOrColon (compoundStatement)?)+
("else" (compoundStatement)?)?
"end"!
;
forExpression
: "for"^ (LINE_BREAK!)?
block_vars
"in" (LINE_BREAK!)?
expression doOrTermialOrColon
(compoundStatement)?
"end"!
;
whileExpression
: "while"^ (LINE_BREAK!)?
expression doOrTermialOrColon
(compoundStatement)?
"end"!
;
untilExpression
: "until"^ (LINE_BREAK!)?
expression doOrTermialOrColon
(compoundStatement)?
"end"!
;
moduleDefinition
: "module"^ (LINE_BREAK!)?
moduleName (options {greedy=true;}:terminal)? {enterScope();}
(bodyStatement)?
"end"! {leaveScope();}
;
moduleName
: CONSTANT (COLON2^ CONSTANT)*
| (LEADING_COLON2 CONSTANT) (COLON2^ CONSTANT)*
;
classDefinition
: "class"^ (LINE_BREAK!)?
( className (LESS_THAN expression)?
| LEFT_SHIFT expression
)
terminal {enterScope();}
(bodyStatement)?
"end"! {leaveScope();}
;
/*
FIXME
cname : tIDENTIFIER
| tCONSTANT
;
cpath : tCOLON3 cname
| cname
| primary_value tCOLON2 cname
;
*/
className
: (CONSTANT|FUNCTION) (COLON2^ CONSTANT)*
| (LEADING_COLON2 CONSTANT) (COLON2^ CONSTANT)*
;
methodDefinition
: "def"^ {++is_in_method_definition;}
(options{greedy=true;}:LINE_BREAK!)?
methodName {enterScope();}
methodDefinitionArgument
(bodyStatement)?
"end"! {leaveScope();--is_in_method_definition;}
;
protected
methodNameSupplement
: (DOT|COLON2)
(IDENTIFIER (ASSIGN_WITH_NO_LEADING_SPACE)?
|FUNCTION (ASSIGN_WITH_NO_LEADING_SPACE)?
|CONSTANT (ASSIGN_WITH_NO_LEADING_SPACE)?
|operatorAsMethodname
|keyword
)
;
methodName
{boolean is_singleton_method = false;}
: ( operatorAsMethodname
| keywordAsMethodName
| (id:IDENTIFIER
|function:FUNCTION
|constant:CONSTANT
)
(methodNameSupplement{is_singleton_method = true;}|ASSIGN_WITH_NO_LEADING_SPACE)?
| (LPAREN!|LPAREN_WITH_NO_LEADING_SPACE!)
expression (LINE_BREAK!)?
RPAREN!
methodNameSupplement{is_singleton_method = true;}
| (INSTANCE_VARIABLE|CLASS_VARIABLE|GLOBAL_VARIABLE ) methodNameSupplement {is_singleton_method = true;}
| ("nil"|"self"|"true"|"false"|"__FILE__"|"__LINE__") methodNameSupplement {is_singleton_method = true;}
| UNARY_PLUS_MINUS_METHOD_NAME
)
{
if (is_singleton_method) {
#methodName = #(#[SINGLETON_METHOD, "SINGLETON_METHOD"], #methodName);
}
}
;
operatorAsMethodname
: LEFT_SHIFT
| RIGHT_SHIFT
| EQUAL
| CASE_EQUAL
| GREATER_THAN
| GREATER_OR_EQUAL
| LESS_THAN
| LESS_OR_EQUAL
| PLUS
| MINUS
| STAR
| DIV
| MOD
| POWER
| BAND
| BOR
| BXOR
| (EMPTY_ARRAY |EMPTY_ARRAY_ACCESS) (options{greedy=true;}:ASSIGN_WITH_NO_LEADING_SPACE)?
| MATCH
| COMPARE
| BNOT
| SINGLE_QUOTE
;
keyword
: keywordAsMethodName
| "nil"
| "self"
| "true"
| "false"
| "__FILE__"
| "__LINE__"
;
keywordAsMethodName
: "and"
| "def"
| "end"
| "in"
| "or"
| "unless"
| "begin"
| "defined?"
| "ensure"
| "module"
| "redo"
| "super"
| "until"
| "BEGIN"
| "break"
| "do"
| "next"
| "rescue"
| "then"
| "when"
| "END"
| "case"
| "else"
| "for"
| "retry"
| "while"
| "alias"
| "class"
| "elsif"
| "if"
| "not"
| "return"
| "undef"
| "yield"
;
methodDefinitionArgument
: lparen
(methodDefinitionArgumentWithoutParen)?
RPAREN! {tellLexerWeHaveFinishedParsingMethodparameters();}
(options {greedy=true;}:terminal)?
| (methodDefinitionArgumentWithoutParen)? terminal
;
methodDefinitionArgumentWithoutParen
{boolean seen_star_or_band = false;}
: normalMethodDefinitionArgument
(COMMA! {if (REST_ARG_PREFIX == LA(1) || BLOCK_ARG_PREFIX == LA(1)) {seen_star_or_band = true;break;}} normalMethodDefinitionArgument)*
( {seen_star_or_band}? restMethodDefinitionArgument
|{seen_star_or_band}? blockMethodDefinitionArgument
)?
| restMethodDefinitionArgument
| blockMethodDefinitionArgument
;
normalMethodDefinitionArgument
: variable ((ASSIGN|ASSIGN_WITH_NO_LEADING_SPACE) expression)?
;
variable
: id1:IDENTIFIER {addVariable(id1);}
| id2:FUNCTION {addVariable(id2);}
;
restMethodDefinitionArgument
: REST_ARG_PREFIX (variable (COMMA! blockMethodDefinitionArgument)?)?
;
blockMethodDefinitionArgument
: BLOCK_ARG_PREFIX variable
;
thenOrTermialOrColon
: "then"!
| terminal ("then"!)?
| COLON!
;
doOrTermialOrColon
: DO_IN_CONDITION!