199 lines
6.9 KiB
Plaintext
199 lines
6.9 KiB
Plaintext
# This file contains objects that are used to track code positions and incrementally
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build up generated code, while keeping track of where it came from, and managing
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indentation levels.
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use "lib/object.nom"
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object (Code):
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my action [set up]:
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assume %me.source
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%old_bits = %me.bits
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%me.bits = []
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if (%me.source is text):
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%me.source = (Source from text %me.source)
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for % in %old_bits:
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%me::add %
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my action [as text]:
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barf "Not implemented"
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my action [as smext]:
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if (%me.__str == (nil)):
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set {%buff:[], %indent:0}
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for %bit in %me.bits:
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if (%bit is text):
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%spaces = (%bit::matching "\n([ ]*)[^\n]*$")
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if %spaces: %indent = (size of %spaces.1)
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..else:
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%bit = (%bit::as smext)
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if (%indent > 0):
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%bit = (%bit::with "\n" -> "\n\(" "::* %indent)")
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%buff::add %bit
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%me.__str = (%buff::joined)
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return %me.__str
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my action [as lua]:
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barf
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return "\(%me.class.name::as lua id)_from_1_2(\(%me.source::as lua), \(%me.bits::as lua))"
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my action [as nomsu] (..)
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"(\(%me.class.name) \(%me.source::as nomsu) \(%me.bits::as nomsu))"
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my action [size] (size of (%me::as smext))
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my action [mark as dirty]:
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%me.__str = (nil)
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%me._trailing_line_len = (nil)
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%me._num_lines = (nil)
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my action [add %new_bits]:
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unless (%new_bits is a "List"):
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%new_bits = [%new_bits]
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for % in %new_bits:
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if (% == ""): do next %
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#if ((% isn't text) and (% isn't a (Code))):
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% = (%::as lua)
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%me.bits::add %
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%me::mark as dirty
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my action [trailing line length]:
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if (%me._trailing_line_len == (nil)):
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%me._trailing_line_len = (size of ((%me::as smext)::matching "[^\n]*$"))
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return %me._trailing_line_len
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my action [number of lines]:
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unless %me._num_lines:
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%num_lines = 1
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for % in %me:
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if (% is text):
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%num_lines += (size of (%::all matches of "\n"))
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..else:
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%num_lines += ((%::number of lines) - 1)
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%me._num_lines = %num_lines
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return %me._num_lines
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my action [is multiline, is multi-line] ((%me::number of lines) > 1)
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my action [is one line, is single line] ((%me::number of lines) == 1)
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my action [add %values joined with %joiner]:
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%me::add %values joined with %joiner or %joiner
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my action [add %values joined with %joiner or %wrapping_joiner]:
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%line_len = 0
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%bits = %me.bits
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for %value in %values at %i:
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if (%i > 1):
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if (%line_len > 80):
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%bits::add %wrapping_joiner
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%line_len = 0
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..else:
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%bits::add %joiner
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%bits::add %value
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unless (%value is text):
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%value = (%value::as smext)
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%line = (%value::matching "\n([^\n]*)$")
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if %line:
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%line_len = (size of %line)
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..else:
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%line_len += (size of %value)
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%me::mark as dirty
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my action [prepend %]:
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#if ((% isn't text) and (% isn't a %me.__type)):
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% = (%::as lua)
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%me.bits::add % at index 1
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%me::mark as dirty
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my action [parenthesize]:
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%me.bits::add "(" at index 1
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%me.bits::add ")"
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%me::mark as dirty
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object (Lua Code) extends (Code):
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my action [add free vars %vars]:
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if ((size of %vars) == 0): return
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%seen = (%v = (yes) for %v in %me.free_vars)
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for %var in %vars:
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assume (%var is text)
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unless %seen.%var:
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%me.free_vars::add %var
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%seen.%var = (yes)
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%me::mark as dirty
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my action [remove free vars %vars]:
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if ((size of %vars) == 0): return
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%removals = {}
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for %var in %vars:
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assume (%var is text)
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%removals.%var = (yes)
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%stack = [%me]
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repeat while ((size of %stack) > 0):
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%lua = (%stack::pop)
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for %i in (size of %lua.free_vars) to 1 by -1:
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if %removals.(%lua.free_vars.%i):
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lua> "table.remove(\%lua.free_vars, \%i)"
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#TODO: reinstate this
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#%lua.free_vars::remove at index %i
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for % in %lua.bits:
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unless (% is text):
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%stack::add %
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%me::mark as dirty
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my action [declare locals] (%me::declare locals (nil))
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my action [declare locals %to_declare]:
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unless %to_declare:
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set {%to_declare:[], %seen:{}}
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for %lua in recursive %me:
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for %var in %lua.free_vars:
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unless %seen.%var:
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%seen.%var = (yes)
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%to_declare::add %var
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for % in %lua.bits:
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unless (% is text):
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recurse %lua on %
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if ((size of %to_declare) > 0):
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%me::remove free vars %to_declare
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%me::prepend "local \(%to_declare::joined with ", ");\n"
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return %to_declare
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my action [as statements] (%me::as statements "" ";")
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my action [as statements %prefix] (%me::as statements %prefix ";")
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my action [as statements %prefix %suffix]:
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unless %me.is_value:
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return %me
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%statements = (Lua Code from %me.source [])
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if ((%prefix or "") != ""):
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%statements::add %prefix
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%statements::add %me
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if (%suffix != ""):
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%statements::add (%suffix or ";")
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return %statements
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action [Lua Code from %source %bits]:
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if (%bits is text): %bits = [%bits]
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if (%source is a "Syntax Tree"): %source = %source.source
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return (..)
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Lua Code {source:%source, bits:%bits, is_value:(no), free_vars:[]}
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action [Lua Code from %source] (Lua Code from %source [])
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action [Lua Value from %source %bits]:
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if (%bits is text): %bits = [%bits]
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if (%source is a "Syntax Tree"): %source = %source.source
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return (..)
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Lua Code {source:%source, bits:%bits, is_value:(yes), free_vars:[]}
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action [Lua Value from %source] (Lua Value from %source [])
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(Lua Code).add_free_vars = (Lua Code).add_free_vars_1
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(Lua Code).remove_free_vars = (Lua Code).remove_free_vars_1
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(Lua Code).declare_locals = (Lua Code).declare_locals_1
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(Lua Code).as_statements = (Lua Code).as_statements_1_2
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object (Nomsu Code) extends (Code):
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action [Nomsu Code from %source %bits]:
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if (%bits is text): %bits = [%bits]
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if (%source is a "Syntax Tree"): %source = %source.source
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return (..)
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Nomsu Code {source:%source, bits:%bits}
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action [Nomsu Code from %source] (Nomsu Code from %source [])
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