NAMESPACE_IN_GENERATED ?= $(FB_NAME)

# These types are meant to be cut off the tree and turned into hand coded flex
# regexes
TRIM_SYMBOLS         ?=
CUT_SYMBOLS          ?=
IRRELEVANT_SYMBOLS   ?=
GENERATE_LOG_LEVEL   ?= notice
FIX_EXTENSIONS       ?= discard
CHECK_SYMBOLS        ?= all
ifneq ($(CHECK_SYMBOLS),)
  OPT_CHECK_SYMBOLS  ?= --check-symbols='$(CHECK_SYMBOLS)'
endif

GENERATED_STD          += $(FB_NAME).l $(FB_NAME).y $(FB_NAME).ebnf $(FB_COMMON_H)
GENERATED              += $(FB_NAME)-dense.ebnf $(GENERATED_STD)
GRAMMAR_INPUT        ?= $(FB_NAME)-input.ebnf
FB_NAME_PREFIX       ?= $(FB_NAME)_
FB_HDRDIR            ?= include
FB_BISON_OUT_EXT     ?= cpp
FB_FLEX_OUT_EXT      ?= cpp
FB_CASE_INSENSITIVE  ?= true
FB_SRC               ?= $(filter %.y %.l,$(GENERATED))
FB_COMMON_H          ?= $(FB_HDRDIR)/$(FB_NAME).h

INCLUDED_BY_GENERATED  += include/defs.h $(FB_COMMON_H) include/lex.$(FB_NAME).h include/$(FB_NAME).tab.h


GENERATE_PY          ?= ./generate.py
GENERATE             ?= python ./$(GENERATE_PY) --log-level $(GENERATE_LOG_LEVEL) create \
				--fix-extensions $(FIX_EXTENSIONS) \
				--unroll-lists \
				--unroll-options \
				--unroll-alternatives \
				--replace-whitespace \
				$(OPT_CHECK_SYMBOLS) \
				--trim-symbols=$(shell echo $(TRIM_SYMBOLS) | sed 's/  */,/g') \
				--cut-symbols=$(shell echo $(CUT_SYMBOLS) | sed 's/  */,/g') \
				--irrelevant-symbols=$(shell echo $(IRRELEVANT_SYMBOLS) | sed 's/  */,/g') \
				--namespace=$(NAMESPACE_IN_GENERATED) \
				--includes=$(shell echo $(INCLUDED_BY_GENERATED) | sed 's/  */,/g') \
				$(CREATE_EXTRA_ARGS)
include $(TOPDIR)/make/proj.mk
include $(MODDIR)/make/flex-bison.mk
include $(MODDIR)/make/py-defs.mk

all:
debug-all:
	GENERATE_LOG_LEVEL=debug make all 2>&1 | tee run.out

generate: $(GENERATED)
#$(FB_NAME).y: $(FB_COMMON_H) lex.$(FB_NAME).$(FB_FLEX_OUT_EXT)
#lex.$(FB_NAME).$(FB_FLEX_OUT_EXT): $(FB_NAME).l

check: $(GRAMMAR_INPUT) $(GENERATE_PY) Makefile
	python ./$(GENERATE_PY) --log-level info check --fix-extensions unroll --unroll-lists --unroll-options $(OPT_CHECK_SYMBOLS) $<

$(FB_NAME)-dense.ebnf: $(GRAMMAR_INPUT) $(GENERATE_PY)
	python ./$(GENERATE_PY) --log-level $(GENERATE_LOG_LEVEL) create --fix-extensions keep $< $(FB_NAME).ebnf > $@.tmp
	mv $@.tmp $@

define generate_rule
$(1): $$(GRAMMAR_INPUT) $$(GENERATE_PY) Makefile
	$$(GENERATE) $$< $$(patsubst $(FB_NAME).%,$(FB_NAME).%,$$@) > $$@.tmp
	mv $$@.tmp $$@
endef
$(foreach target,$(GENERATED_STD),$(eval $(call generate_rule,$(target))))

clean.generated:
	rm -f $(GENERATED)
clean: clean.generated
echo-generated:
	@echo GENERATED = $(GENERATED)

help:
	$(GENERATE) --help

expand-macros:
	make 2>/dev/null | sed '/g++/ !d; s/g++\|gcc//; s/-o .*//' | xargs g++ -E -C | indent