#!/bin/bash

# For bold and italic we can use the Mathematical font variant mappings,
#  although those are only defined for Latin and Greek.
# Latin bold capital: u1d400 - u1d419
# Latin bold small: u1d41a - u1d433
# Latin italic capital: u1d434 - u1d44d
# Latin italic small: u1d44e - u1d467
# Latin bold italic capital: u1d468 - u1d481
# Latin bold italic small: u1d482 - u1d49b
# (Script capital, script small, bold script capital, bold script small)
# (Fraktur capital, fraktur small)
# (Double-struck capital, double-struck small)
# (some Hebrew symbol variants)
# (Bold fraktur capital, bold fraktur small)
# (Sans-serif capital, sans-serif small)
# (Sans-serif bold capital, sans-serif bold small)
# (Sans-serif italic capital, sans-serif italic small)
# (Sans-serif bold italic capital, sans-serif bold italic small)
# (Monospace capital, monospace small)
# Greek bold capital: u1d6a8 - u1d6c0
# Greek bold small: u1d6c2 - u1d6da
# Greek italic capital: u1d6e2 - u1d6fa
# Greek italic small: u1dcfc - u1d714
# Greek bold italic capital: u1d71c - u1d734
# Greek bold italic small: u1d736 - u1d74e
# (Greek sans-serif bold capital: u1d756 - u1d76e)
# (Greek sans-serif bold small: u1d770 - u1d788)
# (Greek sans-serif bold italic capital: u1d790 - u1d7a8)
# (Greek sans-serif bold italic small: u1d7aa - u1d7c2)
# bold digits: u1d7ce - u1d7d7
# (double-struck digits)
# (sans-serif digits)
# (sans-serif bold digits)
# (monospace digits)
# (Arabic mathematical)
# (Arabic stretched)
# (Arabic looped)
# (Arabic double-struck)
#
# It turns out there are no Unicode control codes for marking text
#  bold or italic.  There are for subscript and superscript,
#  and ASCII has similar codes which nobody ever uses.

declare -A bold=(
# Digits:
	[0]=𝟎
	[1]=𝟏
	[2]=𝟐
	[3]=𝟑
	[4]=𝟒
	[5]=𝟓
	[6]=𝟔
	[7]=𝟕
	[8]=𝟖
	[9]=𝟗
# Latin:
	[A]=𝐀
	[B]=𝐁
	[C]=𝐂
	[D]=𝐃
	[E]=𝐄
	[F]=𝐅
	[G]=𝐆
	[H]=𝐇
	[I]=𝐈
	[J]=𝐉
	[K]=𝐊
	[L]=𝐋
	[M]=𝐌
	[N]=𝐍
	[O]=𝐎
	[P]=𝐏
	[Q]=𝐐
	[R]=𝐑
	[S]=𝐒
	[T]=𝐓
	[U]=𝐔
	[V]=𝐕
	[W]=𝐖
	[X]=𝐗
	[Y]=𝐘
	[Z]=𝐙
	[a]=𝐚
	[b]=𝐛
	[c]=𝐜
	[d]=𝐝
	[e]=𝐞
	[f]=𝐟
	[g]=𝐠
	[h]=𝐡
	[i]=𝐢
	[j]=𝐣
	[k]=𝐤
	[l]=𝐥
	[m]=𝐦
	[n]=𝐧
	[o]=𝐨
	[p]=𝐩
	[q]=𝐪
	[r]=𝐫
	[s]=𝐬
	[t]=𝐭
	[u]=𝐮
	[v]=𝐯
	[w]=𝐰
	[x]=𝐱
	[y]=𝐲
	[z]=𝐳
# Latin italic:
	[𝐴]=𝑨
	[𝐵]=𝑩
	[𝐶]=𝑪
	[𝐷]=𝑫
	[𝐸]=𝑬
	[𝐹]=𝑭
	[𝐺]=𝑮
	[𝐻]=𝑯
	[𝐼]=𝑰
	[𝐽]=𝑱
	[𝐾]=𝑲
	[𝐿]=𝑳
	[𝑀]=𝑴
	[𝑁]=𝑵
	[𝑂]=𝑶
	[𝑃]=𝑷
	[𝑄]=𝑸
	[𝑅]=𝑹
	[𝑆]=𝑺
	[𝑇]=𝑻
	[𝑈]=𝑼
	[𝑉]=𝑽
	[𝑊]=𝑾
	[𝑋]=𝑿
	[𝑌]=𝒀
	[𝑍]=𝒁
	[𝑎]=𝒂
	[𝑏]=𝒃
	[𝑐]=𝒄
	[𝑑]=𝒅
	[𝑒]=𝒆
	[𝑓]=𝒇
	[𝑔]=𝒈
	[ℎ]=𝒉 # Planck's constant
	[𝑖]=𝒊
	[𝑗]=𝒋
	[𝑘]=𝒌
	[𝑙]=𝒍
	[𝑚]=𝒎
	[𝑛]=𝒏
	[𝑜]=𝒐
	[𝑝]=𝒑
	[𝑞]=𝒒
	[𝑟]=𝒓
	[𝑠]=𝒔
	[𝑡]=𝒕
	[𝑢]=𝒖
	[𝑣]=𝒗
	[𝑤]=𝒘
	[𝑥]=𝒙
	[𝑦]=𝒚
	[𝑧]=𝒛
# Script:
	[𝒜]=𝓐
	[ℬ]=𝓑
	[𝒞]=𝓒
	[𝒟]=𝓓
	[ℰ]=𝓔
	[ℱ]=𝓕
	[𝒢]=𝓖
	[ℋ]=𝓗
	[ℐ]=𝓘
	[𝒥]=𝓙
	[𝒦]=𝓚
	[ℒ]=𝓛
	[ℳ]=𝓜
	[𝒩]=𝓝
	[𝒪]=𝓞
	[𝒫]=𝓟
	[𝒬]=𝓠
	[ℛ]=𝓡
	[𝒮]=𝓢
	[𝒯]=𝓣
	[𝒰]=𝓤
	[𝒱]=𝓥
	[𝒲]=𝓦
	[𝒳]=𝓧
	[𝒴]=𝓨
	[𝒵]=𝓩
	[𝒶]=𝓪
	[𝒷]=𝓫
	[𝒸]=𝓬
	[𝒹]=𝓭
	[ℯ]=𝓮
	[𝒻]=𝓯
	[ℊ]=𝓰
	[𝒽]=𝓱
	[𝒾]=𝓲
	[𝒿]=𝓳
	[𝓀]=𝓴
	[𝓁]=𝓵
	[𝓂]=𝓶
	[𝓃]=𝓷
	[ℴ]=𝓸
	[𝓅]=𝓹
	[𝓆]=𝓺
	[𝓇]=𝓻
	[𝓈]=𝓼
	[𝓉]=𝓽
	[𝓊]=𝓾
	[𝓋]=𝓿
	[𝓌]=𝔀
	[𝓍]=𝔁
	[𝓎]=𝔂
	[𝓏]=𝔃
# Fraktur:
	[𝔄]=𝕬
	[𝔅]=𝕭
	[ℭ]=𝕮
	[𝔇]=𝕯
	[𝔈]=𝕰
	[𝔉]=𝕱
	[𝔊]=𝕲
	[ℌ]=𝕳
	[ℑ]=𝕴
	[𝔍]=𝕵
	[𝔎]=𝕶
	[𝔏]=𝕷
	[𝔐]=𝕸
	[𝔑]=𝕹
	[𝔒]=𝕺
	[𝔓]=𝕻
	[𝔔]=𝕼
	[ℜ]=𝕽
	[𝔖]=𝕾
	[𝔗]=𝕿
	[𝔘]=𝖀
	[𝔙]=𝖁
	[𝔚]=𝖂
	[𝔛]=𝖃
	[𝔜]=𝖄
	[ℨ]=𝖅
	[𝔞]=𝖆
	[𝔟]=𝖇
	[𝔠]=𝖈
	[𝔡]=𝖉
	[𝔢]=𝖊
	[𝔣]=𝖋
	[𝔤]=𝖌
	[𝔥]=𝖍
	[𝔦]=𝖎
	[𝔧]=𝖏
	[𝔨]=𝖐
	[𝔩]=𝖑
	[𝔪]=𝖒
	[𝔫]=𝖓
	[𝔬]=𝖔
	[𝔭]=𝖕
	[𝔮]=𝖖
	[𝔯]=𝖗
	[𝔰]=𝖘
	[𝔱]=𝖙
	[𝔲]=𝖚
	[𝔳]=𝖛
	[𝔴]=𝖜
	[𝔵]=𝖝
	[𝔶]=𝖞
	[𝔷]=𝖟
# Sans-serif digits:
	[𝟢]=𝟬
	[𝟣]=𝟭
	[𝟤]=𝟮
	[𝟥]=𝟯
	[𝟦]=𝟰
	[𝟧]=𝟱
	[𝟨]=𝟲
	[𝟩]=𝟳
	[𝟪]=𝟴
	[𝟫]=𝟵
# Sans-serif Latin:
	[𝖠]=𝗔
	[𝖡]=𝗕
	[𝖢]=𝗖
	[𝖣]=𝗗
	[𝖤]=𝗘
	[𝖥]=𝗙
	[𝖦]=𝗚
	[𝖧]=𝗛
	[𝖨]=𝗜
	[𝖩]=𝗝
	[𝖪]=𝗞
	[𝖫]=𝗟
	[𝖬]=𝗠
	[𝖭]=𝗡
	[𝖮]=𝗢
	[𝖯]=𝗣
	[𝖰]=𝗤
	[𝖱]=𝗥
	[𝖲]=𝗦
	[𝖳]=𝗧
	[𝖴]=𝗨
	[𝖵]=𝗩
	[𝖶]=𝗪
	[𝖷]=𝗫
	[𝖸]=𝗬
	[𝖹]=𝗭
	[𝖺]=𝗮
	[𝖻]=𝗯
	[𝖼]=𝗰
	[𝖽]=𝗱
	[𝖾]=𝗲
	[𝖿]=𝗳
	[𝗀]=𝗴
	[𝗁]=𝗵
	[𝗂]=𝗶
	[𝗃]=𝗷
	[𝗄]=𝗸
	[𝗅]=𝗹
	[𝗆]=𝗺
	[𝗇]=𝗻
	[𝗈]=𝗼
	[𝗉]=𝗽
	[𝗊]=𝗾
	[𝗋]=𝗿
	[𝗌]=𝘀
	[𝗍]=𝘁
	[𝗎]=𝘂
	[𝗏]=𝘃
	[𝗐]=𝘄
	[𝗑]=𝘅
	[𝗒]=𝘆
	[𝗓]=𝘇
# Sans-serif italic:
# 𝘈 𝘉 𝘊 𝘋 𝘌 𝘍 𝘎 𝘏 𝘐 𝘑 𝘒 𝘓 𝘔 𝘕 𝘖 𝘗 𝘘 𝘙 𝘚 𝘛 𝘜 𝘝 𝘞 𝘟 𝘠 𝘡 𝘢 𝘣 𝘤 𝘥 𝘦 𝘧 𝘨 𝘩 𝘪 𝘫 𝘬 𝘭 𝘮 𝘯 𝘰 𝘱 𝘲 𝘳 𝘴 𝘵 𝘶 𝘷 𝘸 𝘹 𝘺 𝘻
# Greek:
	[Α]=𝚨
	[Β]=𝚩
	[Γ]=𝚪
	[Δ]=𝚫
	[Ε]=𝚬
	[Ζ]=𝚭
	[Η]=𝚮
	[Θ]=𝚯
	[Ι]=𝚰
	[Κ]=𝚱
	[Λ]=𝚲
	[Μ]=𝚳
	[Ν]=𝚴
	[Ξ]=𝚵
	[Ο]=𝚶
	[Π]=𝚷
	[Ρ]=𝚸
	[Σ]=𝚺
	[Τ]=𝚻
	[Υ]=𝚼
	[Φ]=𝚽
	[Χ]=𝚾
	[Ψ]=𝚿
	[Ω]=𝛀
	[α]=𝛂
	[β]=𝛃
	[γ]=𝛄
	[δ]=𝛅
	[ε]=𝛆
	[ζ]=𝛇
	[η]=𝛈
	[θ]=𝛉
	[ι]=𝛊
	[κ]=𝛋
	[λ]=𝛌
	[μ]=𝛍
	[ν]=𝛎
	[ξ]=𝛏
	[ο]=𝛐
	[π]=𝛑
	[ρ]=𝛒
	[ς]=𝛓
	[σ]=𝛔
	[τ]=𝛕
	[υ]=𝛖
	[φ]=𝛗
	[χ]=𝛘
	[ψ]=𝛙
	[ω]=𝛚
# Greek italic:
# 𝛢 𝛣 𝛤 𝛥 𝛦 𝛧 𝛨 𝛩 𝛪 𝛫 𝛬 𝛭 𝛮 𝛯 𝛰 𝛱 𝛲 𝛴 𝛵 𝛶 𝛷 𝛸 𝛹 𝛺 𝛼 𝛽 𝛾 𝛿 𝜀 𝜁 𝜂 𝜃 𝜄 𝜅 𝜆 𝜇 𝜈 𝜉 𝜊 𝜋 𝜌 𝜍 𝜎 𝜏 𝜐 𝜑 𝜒 𝜓 𝜔
# Greek sans-serif italic:
)

# case $0 in embolden) italicise) enscript) fracture) double-strike) sans-serif) monospace) stretch) loop) mathise)

while IFS= read -r line
do	for i in $(seq 0 $((${#line}-1)))
	do
		c=${line:$i:1}
		printf '%s' "${bold[$c]:-$c}"
	done
	echo
done