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org.jruby.parser.JavaSignatureParser.y Maven / Gradle / Ivy
/*
* We started with a full Java grammar from JavaParser (cup) implementation
* (since it was an LALR grammar already) and then stripped out all bits of
* the grammar unrelated to Java method signature parsing. We also changed the
* grammar to accept signatures which do not specify the parameter names. So,
* 'void foo(int)' is as 'void foo(int name)'. This grammar also only works
* with Jay which is another LALR grammar compiler compiler tool.
*
* The output this tool generates is subject to our tri-license (GPL,LGPL,
* and CPL), but this source file itself is released only under the terms
* of the GPL.
*
* This program is released under the terms of the GPL; see the file
* COPYING for more details. There is NO WARRANTY on this code.
*/
%{
package org.jruby.parser;
import java.io.InputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.jruby.ast.java_signature.ArrayTypeNode;
import org.jruby.ast.java_signature.ConstructorSignatureNode;
import org.jruby.ast.java_signature.MethodSignatureNode;
import org.jruby.ast.java_signature.Modifier;
import org.jruby.ast.java_signature.ParameterNode;
import org.jruby.ast.java_signature.PrimitiveTypeNode;
import org.jruby.ast.java_signature.ReferenceTypeNode;
import org.jruby.ast.java_signature.SignatureNode;
import org.jruby.ast.java_signature.TypeNode;
import org.jruby.lexer.JavaSignatureLexer;
public class JavaSignatureParser {
private static JavaSignatureParser parser = new JavaSignatureParser();
public static SignatureNode parse(InputStream in) throws IOException, ParserSyntaxException {
return (SignatureNode) parser.yyparse(JavaSignatureLexer.create(in));
}
%}
// Primitive types
%token BOOLEAN // 'boolean'
%token BYTE // 'byte'
%token SHORT // 'short'
%token INT // 'int'
%token LONG // 'long'
%token CHAR // 'char'
%token FLOAT // 'float'
%token DOUBLE // 'double'
%token VOID // 'void'
// modifiers
%token PUBLIC // 'public'
%token PROTECTED // 'protected'
%token PRIVATE // 'private'
%token STATIC // 'static'
%token ABSTRACT // 'abstract'
%token FINAL // 'final'
%token NATIVE // 'native'
%token SYNCHRONIZED // 'synchronized'
%token TRANSIENT // 'transient'
%token VOLATILE // 'volatile'
%token STRICTFP // 'strictfp'
// identifier (e.g. setFoo)
%token IDENTIFIER
// syntax markers
%token AND // '&'
%token DOT // '.'
%token COMMA // ','
%token ELLIPSIS // '...' or \u2026
%token LPAREN // '('
%token RPAREN // ')'
%token LBRACK // '['
%token RBRACK // ']'
%token QUESTION // '?'
%token LT // '<'
%token GT // '>'
%token THROWS // 'throws'
%token EXTENDS // 'extends'
%token SUPER // 'super'
%token SUPER // 'super'
%token RSHIFT // '>>'
%token URSHIFT // '>>>'
%type method_declarator, method_header
%type constructor_declarator, constructor_declaration
%type formal_parameter_list_opt, formal_parameter_list //
%type modifiers_opt, modifiers, modifiers_none, throws, class_type_list
%type formal_parameter
%type primitive_type, type
%type class_or_interface, class_or_interface_type, array_type
%type interface_type, class_type, reference_type
%type name, type_variable, variable_declarator_id
%type type_bound_1, additional_bound, additional_bound_list_1
%type wildcard, type_argument, type_argument_list
%type type_argument_1, type_argument_2, type_argument_3
%type wildcard_1, wildcard_2, wildcard_3
%type reference_type_1, reference_type_2, reference_type_3
%type type_argument_list_1, type_argument_list_2, type_argument_list_3
%type type_parameter, type_parameter_1
%type type_parameter_list, type_parameter_list_1,
%type type_bound_opt, type_bound, additional_bound_list, additional_bound_list_opt
%type modifier
%type dims
%type none
%type program
%%
program : method_header {
$$ = $1;
} | constructor_declaration {
$$ = $1;
}
type : primitive_type | reference_type { $$ = $1; }
// PrimitiveTypeNode
primitive_type : BYTE {
$$ = PrimitiveTypeNode.BYTE;
}
| SHORT {
$$ = PrimitiveTypeNode.SHORT;
}
| INT {
$$ = PrimitiveTypeNode.INT;
}
| LONG {
$$ = PrimitiveTypeNode.LONG;
}
| CHAR {
$$ = PrimitiveTypeNode.CHAR;
}
| BOOLEAN {
$$ = PrimitiveTypeNode.BOOLEAN;
}
| FLOAT {
$$ = PrimitiveTypeNode.FLOAT;
}
| DOUBLE {
$$ = PrimitiveTypeNode.DOUBLE;
}
// ReferenceTypeNode
reference_type : class_or_interface_type {
$$ = $1;
}
| array_type {
$$ = $1;
}
// String
type_variable : IDENTIFIER {
$$ = $1;
}
// ReferenceTypeNode
class_or_interface : name {
$$ = new ReferenceTypeNode($1);
}
| class_or_interface LT type_argument_list_1 DOT name {
String genericTyping = "<" + $3 + "." + $5;
$$ = $1;
$1.setGenericsTyping(genericTyping);
}
// ReferenceTypeNode
class_or_interface_type : class_or_interface
| class_or_interface LT type_argument_list_1 {
String genericTyping = "<" + $3;
$$ = $1;
$1.setGenericsTyping(genericTyping);
}
// ReferenceTypeNode
class_type : class_or_interface_type
// ReferenceTypeNode
interface_type : class_or_interface_type
// ReferenceTypeNode
array_type : primitive_type dims {
$2.setTypeForArray($1);
$$ = $2;
}
| name dims {
$2.setTypeForArray(new ReferenceTypeNode($1));
$$ = $2;
}
| class_or_interface LT type_argument_list_1 DOT name dims {
$1.setGenericsTyping("<" + $3 + "." + $5);
$6.setTypeForArray($1);
$$ = $6;
}
| class_or_interface LT type_argument_list_1 dims {
$1.setGenericsTyping("<" + $3);
$4.setTypeForArray($1);
$$ = $4;
}
// String
wildcard : QUESTION {
$$ = "?";
} | QUESTION EXTENDS reference_type {
$$ = "? extends " + $3.getFullyTypedName();
} | QUESTION SUPER reference_type {
$$ = "? super " + $3.getFullyTypedName();
}
// String
wildcard_1 : QUESTION GT {
$$ = "?>";
} | QUESTION EXTENDS reference_type_1 {
$$ = "? extends " + $3;
} | QUESTION SUPER reference_type_1 {
$$ = "? super " + $3;
}
// String
wildcard_2 : QUESTION RSHIFT {
$$ = "?>>";
} | QUESTION EXTENDS reference_type_2 {
$$ = "? extends " + $3;
} | QUESTION SUPER reference_type_2 {
$$ = "? super " + $3;
}
// String
wildcard_3 : QUESTION URSHIFT {
$$ = "?>>";
} | QUESTION EXTENDS reference_type_3 {
$$ = "? extends " + $3;
} | QUESTION SUPER reference_type_3 {
$$ = "? super " + $3;
}
// String
reference_type_1 : reference_type GT {
$$ = $1.getFullyTypedName() + ">";
} | class_or_interface LT type_argument_list_2 {
$$ = $1.getFullyTypedName() + "<" + $3;
}
// String
reference_type_2 : reference_type RSHIFT {
$$ = $1.getFullyTypedName() + ">>";
} | class_or_interface LT type_argument_list_3 {
$$ = $1.getFullyTypedName() + "<" + $3;
}
// String
reference_type_3 : reference_type URSHIFT {
$$ = $1.getFullyTypedName() + ">>>";
}
// String
type_argument_list : type_argument {
$$ = $1;
}
| type_argument_list COMMA type_argument {
$$ = $1 + ", " + $3;
}
// String
type_argument_list_1 : type_argument_1
| type_argument_list COMMA type_argument_1 {
$$ = $1 + ", " + $3;
}
// String
type_argument_list_2 : type_argument_2
| type_argument_list COMMA type_argument_2 {
$$ = $1 + ", " + $3;
}
// String
type_argument_list_3 : type_argument_3
| type_argument_list COMMA type_argument_3 {
$$ = $1 + ", " + $3;
}
// String
type_argument : reference_type {
$$ = $1.getFullyTypedName();
}
| wildcard
// String
type_argument_1 : reference_type_1 | wildcard_1
// String
type_argument_2 : reference_type_2 | wildcard_2
// String
type_argument_3 : reference_type_3 | wildcard_3
// List
modifiers_opt : modifiers | modifiers_none
// List
modifiers : modifier {
$$ = new ArrayList();
$$.add($1);
}
| modifiers modifier {
$1.add($2);
}
// List -- This is just so we don't deal with null's.
modifiers_none : { $$ = new ArrayList(); }
// Modifier
modifier : PUBLIC { $$ = Modifier.PUBLIC; }
| PROTECTED { $$ = Modifier.PROTECTED; }
| PRIVATE { $$ = Modifier.PRIVATE; }
| STATIC { $$ = Modifier.STATIC; }
| ABSTRACT { $$ = Modifier.ABSTRACT; }
| FINAL { $$ = Modifier.FINAL; }
| NATIVE { $$ = Modifier.NATIVE; }
| SYNCHRONIZED { $$ = Modifier.SYNCHRONIZED; }
| TRANSIENT { $$ = Modifier.TRANSIENT; }
| VOLATILE { $$ = Modifier.VOLATILE; }
| STRICTFP { $$ = Modifier.STRICTFP; }
// String
name : IDENTIFIER { $$ = $1; } // Foo (or foo)
| name DOT IDENTIFIER { $$ = $1 + "." + $3; } // foo.Foo
// String -- we do not use this for any info
dims : LBRACK RBRACK {
$$ = new ArrayTypeNode();
} | dims LBRACK RBRACK {
$$ = new ArrayTypeNode($1);
}
// List
throws : THROWS class_type_list { $$ = $2; }
| /* none */ { $$ = new ArrayList(); }
// List
class_type_list : class_type {
$$ = new ArrayList();
$$.add($1);
}
| class_type_list COMMA class_type {
$1.add($3);
}
// MethodSignatureNode
method_declarator : IDENTIFIER LPAREN formal_parameter_list_opt RPAREN {
$$ = new MethodSignatureNode($1, $3);
}
// List
formal_parameter_list_opt : formal_parameter_list
| /* none */ { $$ = new ArrayList(); }
// List
formal_parameter_list : formal_parameter {
List list = new ArrayList();
list.add($1);
$$ = list;
}
| formal_parameter_list COMMA formal_parameter {
$1.add($3);
}
// ParameterNode
formal_parameter : type variable_declarator_id {
$$ = new ParameterNode($1, $2);
}
| type {
$$ = new ParameterNode($1, null);
}
| FINAL type variable_declarator_id {
$$ = new ParameterNode($2, $3, true);
}
| FINAL type {
$$ = new ParameterNode($2, null, true);
}
| type ELLIPSIS IDENTIFIER {
$$ = new ParameterNode($1, $3, false, true);
}
| type ELLIPSIS {
$$ = new ParameterNode($1, null, false, true);
}
| FINAL type ELLIPSIS IDENTIFIER {
$$ = new ParameterNode($2, $4, true, true);
}
| FINAL type ELLIPSIS {
$$ = new ParameterNode($2, null, true, true);
}
// String
variable_declarator_id : IDENTIFIER {
$$ = $1;
} | variable_declarator_id LBRACK RBRACK {
// We know this is always preceeded by 'type' production.
$0 = new ArrayTypeNode($0);
$$ = $1;
}
// String
type_parameter_list : type_parameter_list COMMA type_parameter {
$$ = $1 + ", " + $3;
} | type_parameter
// String
type_parameter_list_1 : type_parameter_1
| type_parameter_list COMMA type_parameter_1 {
$$ = $1 + ", " + $3;
}
// String
type_parameter : type_variable type_bound_opt {
$$ = $1 + $2;
}
// String
type_parameter_1 : type_variable GT {
$$ = $1 + ">";
}
| type_variable type_bound_1 {
$$ = $1 + $2;
}
// String
type_bound_1 : EXTENDS reference_type_1 {
$$ = " extends " + $1;
}
| EXTENDS reference_type additional_bound_list_1 {
$$ = " extends " + $2.getFullyTypedName() + $3;
}
// String
type_bound_opt : type_bound
| none {
$$ = "";
}
// String
type_bound : EXTENDS reference_type additional_bound_list_opt {
$$ = "extends " + $2.getFullyTypedName() + $3;
}
// String
additional_bound_list_opt : additional_bound_list
| none {
$$ = "";
}
// String
additional_bound_list : additional_bound additional_bound_list {
$$ = $1 + $2;
} | additional_bound
// String
additional_bound_list_1 : additional_bound additional_bound_list_1 {
$$ = $1 + $2;
}
| AND reference_type_1 {
$$ = " & " + $1;
}
// String
additional_bound : AND interface_type {
$$ = " & " + $2.getFullyTypedName();
}
none : { $$ = null; }
constructor_declaration : modifiers_opt constructor_declarator throws {
$$ = $2;
$$.setModifiers($1);
$$.setThrows($3);
} | modifiers_opt LT type_parameter_list_1 constructor_declarator throws {
$$ = $4;
$$.setModifiers($1);
$$.setExtraTypeInfo("<" + $3);
$$.setThrows($5);
}
constructor_declarator : name LPAREN formal_parameter_list_opt RPAREN {
$$ = new ConstructorSignatureNode($1, $3);
}
method_header : modifiers_opt type method_declarator throws {
$$ = $3;
$$.setModifiers($1);
$$.setReturnType($2);
$$.setThrows($4);
}
| modifiers_opt LT type_parameter_list_1 type method_declarator throws {
$$ = $5;
$$.setModifiers($1);
$$.setExtraTypeInfo("<" + $3);
$$.setReturnType($4);
$$.setThrows($6);
}
| modifiers_opt VOID method_declarator throws {
$$ = $3;
$$.setModifiers($1);
$$.setReturnType(PrimitiveTypeNode.VOID);
$$.setThrows($4);
}
| modifiers_opt LT type_parameter_list_1 VOID method_declarator throws {
$$ = $5;
$$.setModifiers($1);
$$.setExtraTypeInfo("<" + $3);
$$.setReturnType(PrimitiveTypeNode.VOID);
$$.setThrows($6);
}
%%
}
