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|
include 'ragel.lm'
include 'rlreduce.lm'
rl ident
/( alpha | '_' ) ( alpha | digit | '_' )*/
rl number
/ digit+ /
rl hex_number
/ '0x' [0-9a-fA-F]+ /
rl hex_char
/ '0x' [0-9a-fA-F]{2} /
rl NL / '\n' /
rl c_comment
/ '/*' ( any | NL )* :>> '*/' /
rl cpp_comment
/ '//' [^\n]* NL /
rl ruby_comment
/ '#' [^\n]* NL /
rl s_literal
/ "'" ([^'\\\n] | '\\' (any | NL))* "'" /
rl d_literal
/ '"' ([^"\\] | NL | '\\' (any | NL))* '"' /
rl host_re_literal
/ '/' ([^/\\] | NL | '\\' (any | NL))* '/' /
namespace inline
lex
literal `fpc `fc `fcurs `ftargs
`fentry `fhold `fexec `fgoto `fnext
`fcall `fret `fbreak `fncall `fnret `fnbreak
token ident /ident/
token number /digit+/
token hex_number /'0x' [0-9a-fA-F]+/
token dec_number /'0x' [0-9a-fA-F]+/
token comment
/ c_comment | cpp_comment /
token string
/ s_literal | d_literal /
token whitespace
/ ( [ \t] | NL )+ /
literal
`{ `} `:: `* `, `( `) `;
token var_ref
/ "$" [a-zA-Z_][a-zA-Z_0-9]* /
{
if GblActionParams
{
input->push( make_token(
typeid<var_ref>, input->pull( match_length ) ) )
}
else
{
# Just pull one char. Don't consume the word because it may
# be a keyword.
input->push( make_token(
typeid<c_any>, input->pull( 1 ) ) )
}
}
token c_any
/ any /
end
end
namespace host
lex
literal `%%{
token close_inc /'}--%%'/
{
input->push( make_token( typeid<close_inc>, input->pull( match_length ) ) )
restoreGlobals()
}
token close_imp /'}++%%'/
{
input->push( make_token( typeid<close_imp>, input->pull( match_length ) ) )
restoreGlobals()
}
token slr / '%%' [^{] [^\n]* '\n' /
{
# Translates single line to multi-line
input->pull( 2 )
R: str = input->pull( match_length - 3 )
input->push( "}%%" )
input->push( R )
input->push( "%%{" )
}
rl NL / '\n' /
rl s_literal
/ "'" ([^'\\\n] | '\\' (any | NL))* "'" /
rl d_literal
/ '"' ([^"\\] | NL | '\\' (any | NL))* '"' /
literal `define `=
token ident /ident "'"?/
token number /digit+/
token hex_number /'0x' [0-9a-fA-F]+/
token comment
/ c_comment | cpp_comment /
token string
/ s_literal | d_literal /
token whitespace
/ ( [ \t] | NL )+ /
token c_any / any /
end
def tok
[`define whitespace ident whitespace? number] :ImportDefNum
| [`define whitespace ident whitespace? string] :ImportDefStr
| [ident whitespace? `= whitespace? number] :ImportAssignNum
| [ident whitespace? `= whitespace? string] :ImportAssignStr
| [`define] :Def
| [`=] :Eq
| [ident] :Ident
| [number] :Number
| [hex_number] :HexNumber
| [comment] :Comment
| [string] :String
| [whitespace] :Whitespace
| [c_any] :Any
end
reduction TopLevel
# Pass Through.
# def tok
# [`define ident number] :Def1
# | [`define ident string] :Def2
# | [ident `= number] :Ass1
# | [ident `= string] :Ass2
# [`define whitespace ident whitespace? number] :ImportDefNum
# | [`define whitespace ident whitespace? string] :ImportDefStr
# | [ident whitespace? `= whitespace? number] :ImportAssignNum
# | [ident whitespace? `= whitespace? string] :ImportAssignStr
# | [`define] :Def
# | [`=] :Eq
# | [ident] :Ident
# | [number] :Number
# | [hex_number] :HexNumber
# | [comment] :Comment
# | [string] :String
# | [whitespace] :Whitespace
# | [c_any] :Any
host::tok :ImportDefNum
{
if ( isImport )
{
Literal *lit = new Literal( @number,
false /* $number->neg */, $number->data,
$number->length, Literal::Number );
string name( $ident->data, $ident->length );
import( @ident, name, lit );
}
}
host::tok :ImportDefStr
{
if ( isImport )
{
Literal *lit = new Literal( @string, false,
$string->data, $string->length, Literal::LitString );
string name( $ident->data, $ident->length );
import( @ident, name, lit );
}
}
host::tok :ImportAssignNum
{
if ( isImport )
{
Literal *lit = new Literal( @number,
false /*$number->neg */, $number->data,
$number->length, Literal::Number );
string name( $ident->data, $ident->length );
import( @ident, name, lit );
}
}
host::tok :ImportAssignStr
{
if ( isImport )
{
Literal *lit = new Literal( @string, false,
$string->data, $string->length, Literal::LitString );
string name( $ident->data, $ident->length );
import( @ident, name, lit );
}
}
end
export RagelError: str
# File name. The open is expected to succeed. It is tested before the colm
# program is called.
A: list_el<str> = argv->pop_head_el()
GblFileName = A->value
# Remaining items are include paths.
while ( argv->length > 0 ) {
A = argv->pop_head_el()
GblIncludePaths->push_tail_el( A )
}
Stream: stream = open( GblFileName, "r" )
reduce TopLevel start[ Stream ]
RagelError = error
|
