/* * Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc. * * This file is part of Jam - see jam.c for Copyright information. */ /* * jamgram.yy - jam grammar * * 04/13/94 (seiwald) - added shorthand L0 for null list pointer * 06/01/94 (seiwald) - new 'actions existing' does existing sources * 08/23/94 (seiwald) - Support for '+=' (append to variable) * 08/31/94 (seiwald) - Allow ?= as alias for "default =". * 09/15/94 (seiwald) - if conditionals take only single arguments, so * that 'if foo == bar' gives syntax error (use =). * 02/11/95 (seiwald) - when scanning arguments to rules, only treat * punctuation keywords as keywords. All arg lists * are terminated with punctuation keywords. * 09/11/00 (seiwald) - Support for function calls; rules return LIST *. * 01/22/01 (seiwald) - replace evaluate_if() with compile_eval() * 01/24/01 (seiwald) - 'while' statement * 03/23/01 (seiwald) - "[ on target rule ]" support * 02/27/02 (seiwald) - un-break "expr : arg in list" syntax * 03/02/02 (seiwald) - rules can be invoked via variable names * 03/12/02 (seiwald) - set YYMAXDEPTH for big, right-recursive rules * 02/28/02 (seiwald) - merge EXEC_xxx flags in with RULE_xxx * 06/21/02 (seiwald) - support for named parameters * 10/22/02 (seiwald) - working return/break/continue statements */ %token ARG STRING %left `||` `|` %left `&&` `&` %left `=` `!=` `in` %left `<` `<=` `>` `>=` %left `!` %{ #include "jam.h" #include "lists.h" #include "variable.h" #include "parse.h" #include "scan.h" #include "compile.h" #include "newstr.h" #include "rules.h" # define YYMAXDEPTH 10000 /* for OSF and other less endowed yaccs */ # define F0 (LIST *(*)(PARSE *, LOL *, int *))0 # define P0 (PARSE *)0 # define S0 (char *)0 # define pappend( l,r ) parse_make( compile_append,l,r,P0,S0,S0,0 ) # define pbreak( l,f ) parse_make( compile_break,l,P0,P0,S0,S0,f ) # define peval( c,l,r ) parse_make( compile_eval,l,r,P0,S0,S0,c ) # define pfor( s,l,r ) parse_make( compile_foreach,l,r,P0,s,S0,0 ) # define pif( l,r,t ) parse_make( compile_if,l,r,t,S0,S0,0 ) # define pincl( l ) parse_make( compile_include,l,P0,P0,S0,S0,0 ) # define plist( s ) parse_make( compile_list,P0,P0,P0,s,S0,0 ) # define plocal( l,r,t ) parse_make( compile_local,l,r,t,S0,S0,0 ) # define pnull() parse_make( compile_null,P0,P0,P0,S0,S0,0 ) # define pon( l,r ) parse_make( compile_on,l,r,P0,S0,S0,0 ) # define prule( a,p ) parse_make( compile_rule,a,p,P0,S0,S0,0 ) # define prules( l,r ) parse_make( compile_rules,l,r,P0,S0,S0,0 ) # define pset( l,r,a ) parse_make( compile_set,l,r,P0,S0,S0,a ) # define pset1( l,r,t,a ) parse_make( compile_settings,l,r,t,S0,S0,a ) # define psetc( s,l,r ) parse_make( compile_setcomp,l,r,P0,s,S0,0 ) # define psete( s,l,s1,f ) parse_make( compile_setexec,l,P0,P0,s,s1,f ) # define pswitch( l,r ) parse_make( compile_switch,l,r,P0,S0,S0,0 ) # define pwhile( l,r ) parse_make( compile_while,l,r,P0,S0,S0,0 ) # define pnode( l,r ) parse_make( F0,l,r,P0,S0,S0,0 ) # define psnode( s,l ) parse_make( F0,l,P0,P0,s,S0,0 ) %} %% run : /* empty */ /* do nothing */ | rules { parse_save( $1.parse ); } ; /* * block - zero or more rules * rules - one or more rules * rule - any one of jam's rules * right-recursive so rules execute in order. */ block : /* empty */ { $$.parse = pnull(); } | rules { $$.parse = $1.parse; } ; rules : rule { $$.parse = $1.parse; } | rule rules { $$.parse = prules( $1.parse, $2.parse ); } | `local` list `;` block { $$.parse = plocal( $2.parse, pnull(), $4.parse ); } | `local` list `=` list `;` block { $$.parse = plocal( $2.parse, $4.parse, $6.parse ); } ; rule : `{` block `}` { $$.parse = $2.parse; } | `include` list `;` { $$.parse = pincl( $2.parse ); } | arg lol `;` { $$.parse = prule( $1.parse, $2.parse ); } | arg assign list `;` { $$.parse = pset( $1.parse, $3.parse, $2.number ); } | arg `on` list assign list `;` { $$.parse = pset1( $1.parse, $3.parse, $5.parse, $4.number ); } | `break` list `;` { $$.parse = pbreak( $2.parse, JMP_BREAK ); } | `continue` list `;` { $$.parse = pbreak( $2.parse, JMP_CONTINUE ); } | `return` list `;` { $$.parse = pbreak( $2.parse, JMP_RETURN ); } | `for` ARG `in` list `{` block `}` { $$.parse = pfor( $2.string, $4.parse, $6.parse ); } | `switch` list `{` cases `}` { $$.parse = pswitch( $2.parse, $4.parse ); } | `if` expr `{` block `}` { $$.parse = pif( $2.parse, $4.parse, pnull() ); } | `if` expr `{` block `}` `else` rule { $$.parse = pif( $2.parse, $4.parse, $7.parse ); } | `while` expr `{` block `}` { $$.parse = pwhile( $2.parse, $4.parse ); } | `rule` ARG params `{` block `}` { $$.parse = psetc( $2.string, $3.parse, $5.parse ); } | `on` arg rule { $$.parse = pon( $2.parse, $3.parse ); } | `actions` eflags ARG bindlist `{` { yymode( SCAN_STRING ); } STRING { yymode( SCAN_NORMAL ); } `}` { $$.parse = psete( $3.string,$4.parse,$7.string,$2.number ); } ; /* * assign - = or += */ assign : `=` { $$.number = VAR_SET; } | `+=` { $$.number = VAR_APPEND; } | `?=` { $$.number = VAR_DEFAULT; } | `default` `=` { $$.number = VAR_DEFAULT; } ; /* * expr - an expression for if */ expr : arg { $$.parse = peval( EXPR_EXISTS, $1.parse, pnull() ); } | expr `=` expr { $$.parse = peval( EXPR_EQUALS, $1.parse, $3.parse ); } | expr `!=` expr { $$.parse = peval( EXPR_NOTEQ, $1.parse, $3.parse ); } | expr `<` expr { $$.parse = peval( EXPR_LESS, $1.parse, $3.parse ); } | expr `<=` expr { $$.parse = peval( EXPR_LESSEQ, $1.parse, $3.parse ); } | expr `>` expr { $$.parse = peval( EXPR_MORE, $1.parse, $3.parse ); } | expr `>=` expr { $$.parse = peval( EXPR_MOREEQ, $1.parse, $3.parse ); } | expr `&` expr { $$.parse = peval( EXPR_AND, $1.parse, $3.parse ); } | expr `&&` expr { $$.parse = peval( EXPR_AND, $1.parse, $3.parse ); } | expr `|` expr { $$.parse = peval( EXPR_OR, $1.parse, $3.parse ); } | expr `||` expr { $$.parse = peval( EXPR_OR, $1.parse, $3.parse ); } | arg `in` list { $$.parse = peval( EXPR_IN, $1.parse, $3.parse ); } | `!` expr { $$.parse = peval( EXPR_NOT, $2.parse, pnull() ); } | `(` expr `)` { $$.parse = $2.parse; } ; /* * cases - action elements inside a 'switch' * case - a single action element inside a 'switch' * right-recursive rule so cases can be examined in order. */ cases : /* empty */ { $$.parse = P0; } | case cases { $$.parse = pnode( $1.parse, $2.parse ); } ; case : `case` ARG `:` block { $$.parse = psnode( $2.string, $4.parse ); } ; /* * params - optional parameter names to rule definition * right-recursive rule so that params can be added in order. */ params : /* empty */ { $$.parse = P0; } | ARG `:` params { $$.parse = psnode( $1.string, $3.parse ); } | ARG { $$.parse = psnode( $1.string, P0 ); } ; /* * lol - list of lists * right-recursive rule so that lists can be added in order. */ lol : list { $$.parse = pnode( P0, $1.parse ); } | list `:` lol { $$.parse = pnode( $3.parse, $1.parse ); } ; /* * list - zero or more args in a LIST * listp - list (in puncutation only mode) * arg - one ARG or function call */ list : listp { $$.parse = $1.parse; yymode( SCAN_NORMAL ); } ; listp : /* empty */ { $$.parse = pnull(); yymode( SCAN_PUNCT ); } | listp arg { $$.parse = pappend( $1.parse, $2.parse ); } ; arg : ARG { $$.parse = plist( $1.string ); } | `[` { yymode( SCAN_NORMAL ); } func `]` { $$.parse = $3.parse; } ; /* * func - a function call (inside []) * This needs to be split cleanly out of 'rule' */ func : arg lol { $$.parse = prule( $1.parse, $2.parse ); } | `on` arg arg lol { $$.parse = pon( $2.parse, prule( $3.parse, $4.parse ) ); } | `on` arg `return` list { $$.parse = pon( $2.parse, $4.parse ); } ; /* * eflags - zero or more modifiers to 'executes' * eflag - a single modifier to 'executes' */ eflags : /* empty */ { $$.number = 0; } | eflags eflag { $$.number = $1.number | $2.number; } ; eflag : `updated` { $$.number = RULE_UPDATED; } | `together` { $$.number = RULE_TOGETHER; } | `ignore` { $$.number = RULE_IGNORE; } | `quietly` { $$.number = RULE_QUIETLY; } | `piecemeal` { $$.number = RULE_PIECEMEAL; } | `existing` { $$.number = RULE_EXISTING; } | `maxline` ARG { $$.number = atoi( $2.string ) * RULE_MAXLINE; } ; /* * bindlist - list of variable to bind for an action */ bindlist : /* empty */ { $$.parse = pnull(); } | `bind` list { $$.parse = $2.parse; } ;
# | Change | User | Description | Committed | |
---|---|---|---|---|---|
#7 | 3183 | Craig Mcpheeters | Integration of my jam mainline branch into my work branch. | ||
#6 | 1606 | Craig Mcpheeters |
Integration from my modified jam mainline. This is all the mainline changes into my work branch. |
||
#5 | 1605 | Craig Mcpheeters |
Updated with respect to my copy at work. A few minor updates/enhancements |
||
#4 | 1480 | Craig Mcpheeters |
Changed the style of the 'expr' rule in jamgram.yy to something similar to that used in 2.3 for the 'cond' rule. The expr rule was failing on expressions of the form: if ! $(var) in $(list) { } which was being expressed as: if ( ! $(var) ) in $(list) { } rather than the old 2.3 behaviour: if ! ( $(var) in $(list) ) { } In our Jambase, I now turn on the header cache, always |
||
#3 | 1477 | Craig Mcpheeters |
Integration from my main jam branch. This is 2.4-dev with my extensions. |
||
#2 | 785 | Craig Mcpheeters |
Integration from //guest/craig_mcpheeters/jam/src/... This work area now contains both the Alias|Wavefront changes, and the latest integrations from the mainline. There are some changes in this area which shouldn't be merged back into the mainline. As I merge this branch back into my jam/src/... branch, I'll leave out a few of the changes. |
||
#1 | 777 | Craig Mcpheeters |
Branch of my jam/src/... area. This new area establishes the integration base for the copy of Jam which has all the changes. |
||
//guest/craig_mcpheeters/jam/src/jamgram.yy | |||||
#2 | 617 | Craig Mcpheeters | Integration from mainline as of @3 | ||
#1 | 616 | Craig Mcpheeters | Integration from Jam mainline, as of @2 |