diff --git a/autotests/folding/build.ninja.fold b/autotests/folding/build.ninja.fold
new file mode 100644
--- /dev/null
+++ b/autotests/folding/build.ninja.fold
@@ -0,0 +1,122 @@
+# comment
+rule b
+rule c
+#d
+rule c
+description=a
+rule d
+ description = ds
+ description = ds
+ rule=ds
+ description = ds
+rule b
+
+rule c
+
+rule c
+ # ds
+ ds=ds
+description=a
+rule d
+ rule =description = ds
+
+rule b
+ command = clang -MMD -MF $out.d -o $out -c $in
+ description = building $out
+ unknown = xyz
+
+rule dump
+ command = sleep 1; ls -l /proc/self/fd; exit 1
+ pool = link_pool
+ # blah blah
+ pool = console
+ pool = $console
+
+rule xy-z_
+rule --xy-z_
+rule _xy-z_
+
+# error
+rule with error
+rule a:a
+rule a|a
+rule a$
+rule 0-@#d
+
+# browse_py.h is used to inline browse.py.
+rule inline
+ command = "$root/src/inline.sh" $varname < $in > $out
+ description = INLINE $out
+
+default foo bar
+default baz
+
+include ninja1.ninja
+
+subninja ninja2.ninja
+
+pool link_pool
+ depth = 4
+ xxx = d
+
+pool link_pool d
+ depth = 4
+
+build a.o: b a.c
+
+build a.o|c: b a.c || a | b
+
+build a.o | c : b a.c | a || b
+
+build $a.o | $c : b $a.c | $a || $b
+
+build 0: sleep README
+
+build 1: sleep README
+
+build all: phony 0 1
+deps = xxx
+CMD = cc
+build all: phony 0 1
+
+build $builddir/browse_py.h: inline $root/src/browse.py | $root/src/inline.sh
+ varname = kBrowsePy
+
+build $builddir/subprocess-posix.o: cxx $root/src/subprocess-posix.cc
+build $builddir/libninja.a: ar $builddir/browse.o $builddir/build.o $
+ $builddir/build_log.o $builddir/clean.o $builddir/debug_flags.o $
+ $builddir/depfile_parser.o $builddir/deps_log.o
+
+build $root/doc/manual.pdf: dblatex $builddir/manual.xml | $
+ $root/doc/dblatex.xsl
+
+builddir=/
+builddir =/
+builddir= /
+ldflags = -L$builddir
+
+xx x
+
+x = $a
+x = $-a_
+x = ${a}
+x = ${-a}
+x = $a@
+x = $@
+x = $$
+x = $:
+x = $ a
+x = $
+ b
+x = $
+ $
+ a
+x = $
+ $a
+x = $a a
+x = ${a} a
+x = $$ a
+x = $: a
+x = $! a
+x = ${a b ds
+ x = a
diff --git a/autotests/html/build.ninja.html b/autotests/html/build.ninja.html
new file mode 100644
--- /dev/null
+++ b/autotests/html/build.ninja.html
@@ -0,0 +1,129 @@
+
+
+
+build.ninja
+
+
+# comment
+rule b
+rule c
+#d
+rule c
+description=a
+rule d
+ description = ds
+ description = ds
+ rule=ds
+ description = ds
+rule b
+
+rule c
+
+rule c
+ # ds
+ ds=ds
+description=a
+rule d
+ rule =description = ds
+
+rule b
+ command = clang -MMD -MF $out.d -o $out -c $in
+ description = building $out
+ unknown = xyz
+
+rule dump
+ command = sleep 1; ls -l /proc/self/fd; exit 1
+ pool = link_pool
+ # blah blah
+ pool = console
+ pool = $console
+
+rule xy-z_
+rule --xy-z_
+rule _xy-z_
+
+# error
+rule with error
+rule a:a
+rule a|a
+rule a$
+rule 0-@#d
+
+# browse_py.h is used to inline browse.py.
+rule inline
+ command = "$root/src/inline.sh" $varname < $in > $out
+ description = INLINE $out
+
+default foo bar
+default baz
+
+include ninja1.ninja
+
+subninja ninja2.ninja
+
+pool link_pool
+ depth = 4
+ xxx = d
+
+pool link_pool d
+ depth = 4
+
+build a.o: b a.c
+
+build a.o|c: b a.c || a | b
+
+build a.o | c : b a.c | a || b
+
+build $a.o | $c : b $a.c | $a || $b
+
+build 0: sleep README
+
+build 1: sleep README
+
+build all: phony 0 1
+deps = xxx
+CMD = cc
+build all: phony 0 1
+
+build $builddir/browse_py.h: inline $root/src/browse.py | $root/src/inline.sh
+ varname = kBrowsePy
+
+build $builddir/subprocess-posix.o: cxx $root/src/subprocess-posix.cc
+build $builddir/libninja.a: ar $builddir/browse.o $builddir/build.o $
+ $builddir/build_log.o $builddir/clean.o $builddir/debug_flags.o $
+ $builddir/depfile_parser.o $builddir/deps_log.o
+
+build $root/doc/manual.pdf: dblatex $builddir/manual.xml | $
+ $root/doc/dblatex.xsl
+
+builddir=/
+builddir =/
+builddir= /
+ldflags = -L$builddir
+
+xx x
+
+x = $a
+x = $-a_
+x = ${a}
+x = ${-a}
+x = $a@
+x = $@
+x = $$
+x = $:
+x = $ a
+x = $
+ b
+x = $
+ $
+ a
+x = $
+ $a
+x = $a a
+x = ${a} a
+x = $$ a
+x = $: a
+x = $! a
+x = ${a b ds
+ x = a
+
diff --git a/autotests/input/build.ninja b/autotests/input/build.ninja
new file mode 100644
--- /dev/null
+++ b/autotests/input/build.ninja
@@ -0,0 +1,122 @@
+# comment
+rule b
+rule c
+#d
+rule c
+description=a
+rule d
+ description = ds
+ description = ds
+ rule=ds
+ description = ds
+rule b
+
+rule c
+
+rule c
+ # ds
+ ds=ds
+description=a
+rule d
+ rule =description = ds
+
+rule b
+ command = clang -MMD -MF $out.d -o $out -c $in
+ description = building $out
+ unknown = xyz
+
+rule dump
+ command = sleep 1; ls -l /proc/self/fd; exit 1
+ pool = link_pool
+ # blah blah
+ pool = console
+ pool = $console
+
+rule xy-z_
+rule --xy-z_
+rule _xy-z_
+
+# error
+rule with error
+rule a:a
+rule a|a
+rule a$
+rule 0-@#d
+
+# browse_py.h is used to inline browse.py.
+rule inline
+ command = "$root/src/inline.sh" $varname < $in > $out
+ description = INLINE $out
+
+default foo bar
+default baz
+
+include ninja1.ninja
+
+subninja ninja2.ninja
+
+pool link_pool
+ depth = 4
+ xxx = d
+
+pool link_pool d
+ depth = 4
+
+build a.o: b a.c
+
+build a.o|c: b a.c || a | b
+
+build a.o | c : b a.c | a || b
+
+build $a.o | $c : b $a.c | $a || $b
+
+build 0: sleep README
+
+build 1: sleep README
+
+build all: phony 0 1
+deps = xxx
+CMD = cc
+build all: phony 0 1
+
+build $builddir/browse_py.h: inline $root/src/browse.py | $root/src/inline.sh
+ varname = kBrowsePy
+
+build $builddir/subprocess-posix.o: cxx $root/src/subprocess-posix.cc
+build $builddir/libninja.a: ar $builddir/browse.o $builddir/build.o $
+ $builddir/build_log.o $builddir/clean.o $builddir/debug_flags.o $
+ $builddir/depfile_parser.o $builddir/deps_log.o
+
+build $root/doc/manual.pdf: dblatex $builddir/manual.xml | $
+ $root/doc/dblatex.xsl
+
+builddir=/
+builddir =/
+builddir= /
+ldflags = -L$builddir
+
+xx x
+
+x = $a
+x = $-a_
+x = ${a}
+x = ${-a}
+x = $a@
+x = $@
+x = $$
+x = $:
+x = $ a
+x = $
+ b
+x = $
+ $
+ a
+x = $
+ $a
+x = $a a
+x = ${a} a
+x = $$ a
+x = $: a
+x = $! a
+x = ${a b ds
+ x = a
diff --git a/autotests/reference/build.ninja.ref b/autotests/reference/build.ninja.ref
new file mode 100644
--- /dev/null
+++ b/autotests/reference/build.ninja.ref
@@ -0,0 +1,122 @@
+# comment
+rule b
+rule c
+#d
+rule c
+description=a
+rule d
+ description = ds
+ description = ds
+ rule=ds
+ description = ds
+rule b
+
+rule c
+
+rule c
+ # ds
+ ds=ds
+description=a
+rule d
+ rule =description = ds
+
+rule b
+ command = clang -MMD -MF $out.d -o $out -c $in
+ description = building $out
+ unknown = xyz
+
+rule dump
+ command = sleep 1; ls -l /proc/self/fd; exit 1
+ pool = link_pool
+ # blah blah
+ pool = console
+ pool = $console
+
+rule xy-z_
+rule --xy-z_
+rule _xy-z_
+
+# error
+rule with error
+rule a:a
+rule a|a
+rule a$
+rule 0-@#d
+
+# browse_py.h is used to inline browse.py.
+rule inline
+ command = "$root/src/inline.sh" $varname < $in > $out
+ description = INLINE $out
+
+default foo bar
+default baz
+
+include ninja1.ninja
+
+subninja ninja2.ninja
+
+pool link_pool
+ depth = 4
+ xxx = d
+
+pool link_pool d
+ depth = 4
+
+build a.o: b a.c
+
+build a.o|c: b a.c || a | b
+
+build a.o | c : b a.c | a || b
+
+build $a.o | $c : b $a.c | $a || $b
+
+build 0: sleep README
+
+build 1: sleep README
+
+build all: phony 0 1
+deps = xxx
+CMD = cc
+build all: phony 0 1
+
+build $builddir/browse_py.h: inline $root/src/browse.py | $root/src/inline.sh
+ varname = kBrowsePy
+
+build $builddir/subprocess-posix.o: cxx $root/src/subprocess-posix.cc
+build $builddir/libninja.a: ar $builddir/browse.o $builddir/build.o $
+ $builddir/build_log.o $builddir/clean.o $builddir/debug_flags.o $
+ $builddir/depfile_parser.o $builddir/deps_log.o
+
+build $root/doc/manual.pdf: dblatex $builddir/manual.xml | $
+ $root/doc/dblatex.xsl
+
+builddir=/
+builddir =/
+builddir= /
+ldflags = -L$builddir
+
+xx x
+
+x = $a
+x = $-a_
+x = ${a}
+x = ${-a}
+x = $a@
+x = $@
+x = $$
+x = $:
+x = $ a
+x = $
+ b
+x = $
+ $
+ a
+x = $
+ $a
+x = $a a
+x = ${a} a
+x = $$ a
+x = $: a
+x = $! a
+x = ${a b ds
+ x = a
diff --git a/data/syntax/ninja.xml b/data/syntax/ninja.xml
new file mode 100644
--- /dev/null
+++ b/data/syntax/ninja.xml
@@ -0,0 +1,288 @@
+
+
+
+]>
+
+
+ - rule
+ - build
+ - pool
+
+ - default
+ - include
+ - subninja
+
+
+
+ - console
+
+
+
+ - phony
+
+
+
+ - builddir
+ - ninja_required_version
+
+
+
+ - depth
+
+
+
+ - command
+ - console
+ - depfile
+ - deps
+ - msvc_deps_prefix
+ - description
+ - generator
+ - in
+ - in_newline
+ - out
+ - pool
+ - restat
+ - rspfile
+ - rspfile_content
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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