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Add a LALR grammar for Rust with testing support #21452

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Jan 25, 2015
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Add a LALR grammar for Rust with testing support #21452

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2 changes: 2 additions & 0 deletions configure
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Original file line number Diff line number Diff line change
Expand Up @@ -647,6 +647,8 @@ probe CFG_ISCC iscc
probe CFG_JAVAC javac
probe CFG_ANTLR4 antlr4
probe CFG_GRUN grun
probe CFG_FLEX flex
probe CFG_BISON bison
probe CFG_PANDOC pandoc
probe CFG_PDFLATEX pdflatex
probe CFG_XELATEX xelatex
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48 changes: 48 additions & 0 deletions mk/grammar.mk
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Expand Up @@ -14,6 +14,11 @@ B = $(CFG_BUILD_DIR)/$(CFG_BUILD)/stage2/
L = $(B)lib/rustlib/$(CFG_BUILD)/lib
LD = $(CFG_BUILD)/stage2/lib/rustlib/$(CFG_BUILD)/lib/
RUSTC = $(STAGE2_T_$(CFG_BUILD)_H_$(CFG_BUILD))
ifeq ($(CFG_OSTYPE),apple-darwin)
FLEX_LDFLAGS=-ll
else
FLEX_LDFLAGS=-lfl
endif

# Run the reference lexer against libsyntax and compare the tokens and spans.
# If "// ignore-lexer-test" is present in the file, it will be ignored.
Expand Down Expand Up @@ -67,3 +72,46 @@ $(info cfg: javac not available, skipping lexer test...)
check-lexer:

endif

$(BG)lex.yy.c: $(SG)lexer.l $(BG)
@$(call E, flex: $@)
$(Q)$(CFG_FLEX) -o $@ $<

$(BG)lexer-lalr.o: $(BG)lex.yy.c $(BG)parser-lalr.tab.h
@$(call E, cc: $@)
$(Q)$(CFG_CC) -include $(BG)parser-lalr.tab.h -c -o $@ $<

$(BG)parser-lalr.tab.c $(BG)parser-lalr.tab.h: $(SG)parser-lalr.y
@$(call E, bison: $@)
$(Q)$(CFG_BISON) $< --output=$(BG)parser-lalr.tab.c --defines=$(BG)parser-lalr.tab.h \
--name-prefix=rs --warnings=error=all

$(BG)parser-lalr.o: $(BG)parser-lalr.tab.c
@$(call E, cc: $@)
$(Q)$(CFG_CC) -c -o $@ $<

$(BG)parser-lalr-main.o: $(SG)parser-lalr-main.c
@$(call E, cc: $@)
$(Q)$(CFG_CC) -std=c99 -c -o $@ $<

$(BG)parser-lalr: $(BG)parser-lalr.o $(BG)parser-lalr-main.o $(BG)lexer-lalr.o
@$(call E, cc: $@)
$(Q)$(CFG_CC) -o $@ $^ $(FLEX_LDFLAGS)


ifdef CFG_FLEX
ifdef CFG_BISON
check-grammar: $(BG) $(BG)parser-lalr
$(info Verifying grammar ...)
$(SG)testparser.py -p $(BG)parser-lalr -s $(S)src

else
$(info cfg: bison not available, skipping parser test...)
check-grammar:

endif
else
$(info cfg: flex not available, skipping parser test...)
check-grammar:

endif
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